LCOV - code coverage report
Current view: top level - src/bin/pgbench - exprparse.c (source / functions) Hit Total Coverage
Test: PostgreSQL 13devel Lines: 113 169 66.9 %
Date: 2019-11-21 12:06:29 Functions: 2 2 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* A Bison parser, made by GNU Bison 3.0.4.  */
       2             : 
       3             : /* Bison implementation for Yacc-like parsers in C
       4             : 
       5             :    Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation, Inc.
       6             : 
       7             :    This program is free software: you can redistribute it and/or modify
       8             :    it under the terms of the GNU General Public License as published by
       9             :    the Free Software Foundation, either version 3 of the License, or
      10             :    (at your option) any later version.
      11             : 
      12             :    This program is distributed in the hope that it will be useful,
      13             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :    GNU General Public License for more details.
      16             : 
      17             :    You should have received a copy of the GNU General Public License
      18             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      19             : 
      20             : /* As a special exception, you may create a larger work that contains
      21             :    part or all of the Bison parser skeleton and distribute that work
      22             :    under terms of your choice, so long as that work isn't itself a
      23             :    parser generator using the skeleton or a modified version thereof
      24             :    as a parser skeleton.  Alternatively, if you modify or redistribute
      25             :    the parser skeleton itself, you may (at your option) remove this
      26             :    special exception, which will cause the skeleton and the resulting
      27             :    Bison output files to be licensed under the GNU General Public
      28             :    License without this special exception.
      29             : 
      30             :    This special exception was added by the Free Software Foundation in
      31             :    version 2.2 of Bison.  */
      32             : 
      33             : /* C LALR(1) parser skeleton written by Richard Stallman, by
      34             :    simplifying the original so-called "semantic" parser.  */
      35             : 
      36             : /* All symbols defined below should begin with yy or YY, to avoid
      37             :    infringing on user name space.  This should be done even for local
      38             :    variables, as they might otherwise be expanded by user macros.
      39             :    There are some unavoidable exceptions within include files to
      40             :    define necessary library symbols; they are noted "INFRINGES ON
      41             :    USER NAME SPACE" below.  */
      42             : 
      43             : /* Identify Bison output.  */
      44             : #define YYBISON 1
      45             : 
      46             : /* Bison version.  */
      47             : #define YYBISON_VERSION "3.0.4"
      48             : 
      49             : /* Skeleton name.  */
      50             : #define YYSKELETON_NAME "yacc.c"
      51             : 
      52             : /* Pure parsers.  */
      53             : #define YYPURE 1
      54             : 
      55             : /* Push parsers.  */
      56             : #define YYPUSH 0
      57             : 
      58             : /* Pull parsers.  */
      59             : #define YYPULL 1
      60             : 
      61             : 
      62             : /* Substitute the variable and function names.  */
      63             : #define yyparse         expr_yyparse
      64             : #define yylex           expr_yylex
      65             : #define yyerror         expr_yyerror
      66             : #define yydebug         expr_yydebug
      67             : #define yynerrs         expr_yynerrs
      68             : 
      69             : 
      70             : /* Copy the first part of user declarations.  */
      71             : #line 1 "exprparse.y" /* yacc.c:339  */
      72             : 
      73             : /*-------------------------------------------------------------------------
      74             :  *
      75             :  * exprparse.y
      76             :  *    bison grammar for a simple expression syntax
      77             :  *
      78             :  * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
      79             :  * Portions Copyright (c) 1994, Regents of the University of California
      80             :  *
      81             :  * src/bin/pgbench/exprparse.y
      82             :  *
      83             :  *-------------------------------------------------------------------------
      84             :  */
      85             : 
      86             : #include "postgres_fe.h"
      87             : 
      88             : #include "pgbench.h"
      89             : 
      90             : #define PGBENCH_NARGS_VARIABLE  (-1)
      91             : #define PGBENCH_NARGS_CASE      (-2)
      92             : #define PGBENCH_NARGS_HASH      (-3)
      93             : 
      94             : PgBenchExpr *expr_parse_result;
      95             : 
      96             : static PgBenchExprList *make_elist(PgBenchExpr *exp, PgBenchExprList *list);
      97             : static PgBenchExpr *make_null_constant(void);
      98             : static PgBenchExpr *make_boolean_constant(bool bval);
      99             : static PgBenchExpr *make_integer_constant(int64 ival);
     100             : static PgBenchExpr *make_double_constant(double dval);
     101             : static PgBenchExpr *make_variable(char *varname);
     102             : static PgBenchExpr *make_op(yyscan_t yyscanner, const char *operator,
     103             :         PgBenchExpr *lexpr, PgBenchExpr *rexpr);
     104             : static PgBenchExpr *make_uop(yyscan_t yyscanner, const char *operator, PgBenchExpr *expr);
     105             : static int  find_func(yyscan_t yyscanner, const char *fname);
     106             : static PgBenchExpr *make_func(yyscan_t yyscanner, int fnumber, PgBenchExprList *args);
     107             : static PgBenchExpr *make_case(yyscan_t yyscanner, PgBenchExprList *when_then_list, PgBenchExpr *else_part);
     108             : 
     109             : 
     110             : #line 111 "exprparse.c" /* yacc.c:339  */
     111             : 
     112             : # ifndef YY_NULLPTR
     113             : #  if defined __cplusplus && 201103L <= __cplusplus
     114             : #   define YY_NULLPTR nullptr
     115             : #  else
     116             : #   define YY_NULLPTR 0
     117             : #  endif
     118             : # endif
     119             : 
     120             : /* Enabling verbose error messages.  */
     121             : #ifdef YYERROR_VERBOSE
     122             : # undef YYERROR_VERBOSE
     123             : # define YYERROR_VERBOSE 1
     124             : #else
     125             : # define YYERROR_VERBOSE 0
     126             : #endif
     127             : 
     128             : 
     129             : /* Debug traces.  */
     130             : #ifndef YYDEBUG
     131             : # define YYDEBUG 0
     132             : #endif
     133             : #if YYDEBUG
     134             : extern int expr_yydebug;
     135             : #endif
     136             : 
     137             : /* Token type.  */
     138             : #ifndef YYTOKENTYPE
     139             : # define YYTOKENTYPE
     140             :   enum yytokentype
     141             :   {
     142             :     NULL_CONST = 258,
     143             :     INTEGER_CONST = 259,
     144             :     MAXINT_PLUS_ONE_CONST = 260,
     145             :     DOUBLE_CONST = 261,
     146             :     BOOLEAN_CONST = 262,
     147             :     VARIABLE = 263,
     148             :     FUNCTION = 264,
     149             :     AND_OP = 265,
     150             :     OR_OP = 266,
     151             :     NOT_OP = 267,
     152             :     NE_OP = 268,
     153             :     LE_OP = 269,
     154             :     GE_OP = 270,
     155             :     LS_OP = 271,
     156             :     RS_OP = 272,
     157             :     IS_OP = 273,
     158             :     CASE_KW = 274,
     159             :     WHEN_KW = 275,
     160             :     THEN_KW = 276,
     161             :     ELSE_KW = 277,
     162             :     END_KW = 278,
     163             :     ISNULL_OP = 279,
     164             :     NOTNULL_OP = 280,
     165             :     UNARY = 281
     166             :   };
     167             : #endif
     168             : 
     169             : /* Value type.  */
     170             : #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
     171             : 
     172             : union YYSTYPE
     173             : {
     174             : #line 48 "exprparse.y" /* yacc.c:355  */
     175             : 
     176             :     int64       ival;
     177             :     double      dval;
     178             :     bool        bval;
     179             :     char       *str;
     180             :     PgBenchExpr *expr;
     181             :     PgBenchExprList *elist;
     182             : 
     183             : #line 184 "exprparse.c" /* yacc.c:355  */
     184             : };
     185             : 
     186             : typedef union YYSTYPE YYSTYPE;
     187             : # define YYSTYPE_IS_TRIVIAL 1
     188             : # define YYSTYPE_IS_DECLARED 1
     189             : #endif
     190             : 
     191             : 
     192             : 
     193             : int expr_yyparse (yyscan_t yyscanner);
     194             : 
     195             : 
     196             : 
     197             : /* Copy the second part of user declarations.  */
     198             : 
     199             : #line 200 "exprparse.c" /* yacc.c:358  */
     200             : 
     201             : #ifdef short
     202             : # undef short
     203             : #endif
     204             : 
     205             : #ifdef YYTYPE_UINT8
     206             : typedef YYTYPE_UINT8 yytype_uint8;
     207             : #else
     208             : typedef unsigned char yytype_uint8;
     209             : #endif
     210             : 
     211             : #ifdef YYTYPE_INT8
     212             : typedef YYTYPE_INT8 yytype_int8;
     213             : #else
     214             : typedef signed char yytype_int8;
     215             : #endif
     216             : 
     217             : #ifdef YYTYPE_UINT16
     218             : typedef YYTYPE_UINT16 yytype_uint16;
     219             : #else
     220             : typedef unsigned short int yytype_uint16;
     221             : #endif
     222             : 
     223             : #ifdef YYTYPE_INT16
     224             : typedef YYTYPE_INT16 yytype_int16;
     225             : #else
     226             : typedef short int yytype_int16;
     227             : #endif
     228             : 
     229             : #ifndef YYSIZE_T
     230             : # ifdef __SIZE_TYPE__
     231             : #  define YYSIZE_T __SIZE_TYPE__
     232             : # elif defined size_t
     233             : #  define YYSIZE_T size_t
     234             : # elif ! defined YYSIZE_T
     235             : #  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
     236             : #  define YYSIZE_T size_t
     237             : # else
     238             : #  define YYSIZE_T unsigned int
     239             : # endif
     240             : #endif
     241             : 
     242             : #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
     243             : 
     244             : #ifndef YY_
     245             : # if defined YYENABLE_NLS && YYENABLE_NLS
     246             : #  if ENABLE_NLS
     247             : #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
     248             : #   define YY_(Msgid) dgettext ("bison-runtime", Msgid)
     249             : #  endif
     250             : # endif
     251             : # ifndef YY_
     252             : #  define YY_(Msgid) Msgid
     253             : # endif
     254             : #endif
     255             : 
     256             : #ifndef YY_ATTRIBUTE
     257             : # if (defined __GNUC__                                               \
     258             :       && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)))  \
     259             :      || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C
     260             : #  define YY_ATTRIBUTE(Spec) __attribute__(Spec)
     261             : # else
     262             : #  define YY_ATTRIBUTE(Spec) /* empty */
     263             : # endif
     264             : #endif
     265             : 
     266             : #ifndef YY_ATTRIBUTE_PURE
     267             : # define YY_ATTRIBUTE_PURE   YY_ATTRIBUTE ((__pure__))
     268             : #endif
     269             : 
     270             : #ifndef YY_ATTRIBUTE_UNUSED
     271             : # define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__))
     272             : #endif
     273             : 
     274             : #if !defined _Noreturn \
     275             :      && (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112)
     276             : # if defined _MSC_VER && 1200 <= _MSC_VER
     277             : #  define _Noreturn __declspec (noreturn)
     278             : # else
     279             : #  define _Noreturn YY_ATTRIBUTE ((__noreturn__))
     280             : # endif
     281             : #endif
     282             : 
     283             : /* Suppress unused-variable warnings by "using" E.  */
     284             : #if ! defined lint || defined __GNUC__
     285             : # define YYUSE(E) ((void) (E))
     286             : #else
     287             : # define YYUSE(E) /* empty */
     288             : #endif
     289             : 
     290             : #if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
     291             : /* Suppress an incorrect diagnostic about yylval being uninitialized.  */
     292             : # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
     293             :     _Pragma ("GCC diagnostic push") \
     294             :     _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
     295             :     _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
     296             : # define YY_IGNORE_MAYBE_UNINITIALIZED_END \
     297             :     _Pragma ("GCC diagnostic pop")
     298             : #else
     299             : # define YY_INITIAL_VALUE(Value) Value
     300             : #endif
     301             : #ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
     302             : # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
     303             : # define YY_IGNORE_MAYBE_UNINITIALIZED_END
     304             : #endif
     305             : #ifndef YY_INITIAL_VALUE
     306             : # define YY_INITIAL_VALUE(Value) /* Nothing. */
     307             : #endif
     308             : 
     309             : 
     310             : #if ! defined yyoverflow || YYERROR_VERBOSE
     311             : 
     312             : /* The parser invokes alloca or malloc; define the necessary symbols.  */
     313             : 
     314             : # ifdef YYSTACK_USE_ALLOCA
     315             : #  if YYSTACK_USE_ALLOCA
     316             : #   ifdef __GNUC__
     317             : #    define YYSTACK_ALLOC __builtin_alloca
     318             : #   elif defined __BUILTIN_VA_ARG_INCR
     319             : #    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
     320             : #   elif defined _AIX
     321             : #    define YYSTACK_ALLOC __alloca
     322             : #   elif defined _MSC_VER
     323             : #    include <malloc.h> /* INFRINGES ON USER NAME SPACE */
     324             : #    define alloca _alloca
     325             : #   else
     326             : #    define YYSTACK_ALLOC alloca
     327             : #    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
     328             : #     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
     329             :       /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
     330             : #     ifndef EXIT_SUCCESS
     331             : #      define EXIT_SUCCESS 0
     332             : #     endif
     333             : #    endif
     334             : #   endif
     335             : #  endif
     336             : # endif
     337             : 
     338             : # ifdef YYSTACK_ALLOC
     339             :    /* Pacify GCC's 'empty if-body' warning.  */
     340             : #  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
     341             : #  ifndef YYSTACK_ALLOC_MAXIMUM
     342             :     /* The OS might guarantee only one guard page at the bottom of the stack,
     343             :        and a page size can be as small as 4096 bytes.  So we cannot safely
     344             :        invoke alloca (N) if N exceeds 4096.  Use a slightly smaller number
     345             :        to allow for a few compiler-allocated temporary stack slots.  */
     346             : #   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
     347             : #  endif
     348             : # else
     349             : #  define YYSTACK_ALLOC YYMALLOC
     350             : #  define YYSTACK_FREE YYFREE
     351             : #  ifndef YYSTACK_ALLOC_MAXIMUM
     352             : #   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
     353             : #  endif
     354             : #  if (defined __cplusplus && ! defined EXIT_SUCCESS \
     355             :        && ! ((defined YYMALLOC || defined malloc) \
     356             :              && (defined YYFREE || defined free)))
     357             : #   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
     358             : #   ifndef EXIT_SUCCESS
     359             : #    define EXIT_SUCCESS 0
     360             : #   endif
     361             : #  endif
     362             : #  ifndef YYMALLOC
     363             : #   define YYMALLOC malloc
     364             : #   if ! defined malloc && ! defined EXIT_SUCCESS
     365             : void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
     366             : #   endif
     367             : #  endif
     368             : #  ifndef YYFREE
     369             : #   define YYFREE free
     370             : #   if ! defined free && ! defined EXIT_SUCCESS
     371             : void free (void *); /* INFRINGES ON USER NAME SPACE */
     372             : #   endif
     373             : #  endif
     374             : # endif
     375             : #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
     376             : 
     377             : 
     378             : #if (! defined yyoverflow \
     379             :      && (! defined __cplusplus \
     380             :          || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
     381             : 
     382             : /* A type that is properly aligned for any stack member.  */
     383             : union yyalloc
     384             : {
     385             :   yytype_int16 yyss_alloc;
     386             :   YYSTYPE yyvs_alloc;
     387             : };
     388             : 
     389             : /* The size of the maximum gap between one aligned stack and the next.  */
     390             : # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
     391             : 
     392             : /* The size of an array large to enough to hold all stacks, each with
     393             :    N elements.  */
     394             : # define YYSTACK_BYTES(N) \
     395             :      ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
     396             :       + YYSTACK_GAP_MAXIMUM)
     397             : 
     398             : # define YYCOPY_NEEDED 1
     399             : 
     400             : /* Relocate STACK from its old location to the new one.  The
     401             :    local variables YYSIZE and YYSTACKSIZE give the old and new number of
     402             :    elements in the stack, and YYPTR gives the new location of the
     403             :    stack.  Advance YYPTR to a properly aligned location for the next
     404             :    stack.  */
     405             : # define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
     406             :     do                                                                  \
     407             :       {                                                                 \
     408             :         YYSIZE_T yynewbytes;                                            \
     409             :         YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
     410             :         Stack = &yyptr->Stack_alloc;                                    \
     411             :         yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
     412             :         yyptr += yynewbytes / sizeof (*yyptr);                          \
     413             :       }                                                                 \
     414             :     while (0)
     415             : 
     416             : #endif
     417             : 
     418             : #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
     419             : /* Copy COUNT objects from SRC to DST.  The source and destination do
     420             :    not overlap.  */
     421             : # ifndef YYCOPY
     422             : #  if defined __GNUC__ && 1 < __GNUC__
     423             : #   define YYCOPY(Dst, Src, Count) \
     424             :       __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
     425             : #  else
     426             : #   define YYCOPY(Dst, Src, Count)              \
     427             :       do                                        \
     428             :         {                                       \
     429             :           YYSIZE_T yyi;                         \
     430             :           for (yyi = 0; yyi < (Count); yyi++)   \
     431             :             (Dst)[yyi] = (Src)[yyi];            \
     432             :         }                                       \
     433             :       while (0)
     434             : #  endif
     435             : # endif
     436             : #endif /* !YYCOPY_NEEDED */
     437             : 
     438             : /* YYFINAL -- State number of the termination state.  */
     439             : #define YYFINAL  25
     440             : /* YYLAST -- Last index in YYTABLE.  */
     441             : #define YYLAST   320
     442             : 
     443             : /* YYNTOKENS -- Number of terminals.  */
     444             : #define YYNTOKENS  42
     445             : /* YYNNTS -- Number of nonterminals.  */
     446             : #define YYNNTS  7
     447             : /* YYNRULES -- Number of rules.  */
     448             : #define YYNRULES  47
     449             : /* YYNSTATES -- Number of states.  */
     450             : #define YYNSTATES  88
     451             : 
     452             : /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
     453             :    by yylex, with out-of-bounds checking.  */
     454             : #define YYUNDEFTOK  2
     455             : #define YYMAXUTOK   281
     456             : 
     457             : #define YYTRANSLATE(YYX)                                                \
     458             :   ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
     459             : 
     460             : /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
     461             :    as returned by yylex, without out-of-bounds checking.  */
     462             : static const yytype_uint8 yytranslate[] =
     463             : {
     464             :        0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     465             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     466             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     467             :        2,     2,     2,     2,     2,    30,     2,    37,    31,     2,
     468             :       40,    41,    35,    33,    39,    34,     2,    36,     2,     2,
     469             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     470             :       26,    28,    27,     2,     2,     2,     2,     2,     2,     2,
     471             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     472             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     473             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     474             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     475             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     476             :        2,     2,     2,     2,    29,     2,    32,     2,     2,     2,
     477             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     478             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     479             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     480             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     481             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     482             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     483             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     484             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     485             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     486             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     487             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     488             :        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     489             :        2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
     490             :        5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
     491             :       15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
     492             :       25,    38
     493             : };
     494             : 
     495             : #if YYDEBUG
     496             :   /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
     497             : static const yytype_uint8 yyrline[] =
     498             : {
     499             :        0,    82,    82,    84,    85,    86,    89,    90,    92,    95,
     500             :       98,   100,   101,   102,   103,   104,   105,   106,   107,   108,
     501             :      109,   110,   111,   112,   113,   114,   115,   116,   117,   118,
     502             :      120,   121,   125,   126,   131,   135,   141,   142,   143,   144,
     503             :      146,   147,   148,   152,   153,   156,   157,   159
     504             : };
     505             : #endif
     506             : 
     507             : #if YYDEBUG || YYERROR_VERBOSE || 0
     508             : /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
     509             :    First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
     510             : static const char *const yytname[] =
     511             : {
     512             :   "$end", "error", "$undefined", "NULL_CONST", "INTEGER_CONST",
     513             :   "MAXINT_PLUS_ONE_CONST", "DOUBLE_CONST", "BOOLEAN_CONST", "VARIABLE",
     514             :   "FUNCTION", "AND_OP", "OR_OP", "NOT_OP", "NE_OP", "LE_OP", "GE_OP",
     515             :   "LS_OP", "RS_OP", "IS_OP", "CASE_KW", "WHEN_KW", "THEN_KW", "ELSE_KW",
     516             :   "END_KW", "ISNULL_OP", "NOTNULL_OP", "'<'", "'>'", "'='", "'|'", "'#'",
     517             :   "'&'", "'~'", "'+'", "'-'", "'*'", "'/'", "'%'", "UNARY", "','", "'('",
     518             :   "')'", "$accept", "result", "elist", "expr", "when_then_list",
     519             :   "case_control", "function", YY_NULLPTR
     520             : };
     521             : #endif
     522             : 
     523             : # ifdef YYPRINT
     524             : /* YYTOKNUM[NUM] -- (External) token number corresponding to the
     525             :    (internal) symbol number NUM (which must be that of a token).  */
     526             : static const yytype_uint16 yytoknum[] =
     527             : {
     528             :        0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
     529             :      265,   266,   267,   268,   269,   270,   271,   272,   273,   274,
     530             :      275,   276,   277,   278,   279,   280,    60,    62,    61,   124,
     531             :       35,    38,   126,    43,    45,    42,    47,    37,   281,    44,
     532             :       40,    41
     533             : };
     534             : # endif
     535             : 
     536             : #define YYPACT_NINF -33
     537             : 
     538             : #define yypact_value_is_default(Yystate) \
     539             :   (!!((Yystate) == (-33)))
     540             : 
     541             : #define YYTABLE_NINF -1
     542             : 
     543             : #define yytable_value_is_error(Yytable_value) \
     544             :   (!!((Yytable_value) == (-1)))
     545             : 
     546             :   /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
     547             :      STATE-NUM.  */
     548             : static const yytype_int16 yypact[] =
     549             : {
     550             :       64,   -33,   -33,   -33,   -33,   -33,   -33,    64,   -19,    64,
     551             :       64,    46,    64,    13,   205,   -33,   -22,   258,    64,    -6,
     552             :       11,   -33,   -33,   -33,    92,   -33,    64,    64,    64,    64,
     553             :       64,    64,    64,     3,   -33,   -33,    64,    64,    64,    64,
     554             :       64,    64,    64,    64,    64,    64,    64,    64,   121,    64,
     555             :       64,   -33,   -33,   258,   233,   283,   283,   283,    11,    11,
     556             :      -33,   -33,     5,   283,   283,   283,    11,    11,    11,    -9,
     557             :       -9,   -33,   -33,   -33,   -32,   205,    64,   149,   177,   -33,
     558             :      -33,    64,   -33,   205,    64,   -33,   205,   205
     559             : };
     560             : 
     561             :   /* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
     562             :      Performed when YYTABLE does not specify something else to do.  Zero
     563             :      means the default is an error.  */
     564             : static const yytype_uint8 yydefact[] =
     565             : {
     566             :        0,    36,    38,    39,    37,    40,    47,     0,     0,     0,
     567             :        0,     0,     0,     0,     2,    42,     0,    11,     0,     0,
     568             :       10,     7,     9,     8,     0,     1,     0,     0,     0,     0,
     569             :        0,     0,     0,     0,    30,    31,     0,     0,     0,     0,
     570             :        0,     0,     0,     0,     0,     0,     0,     3,     0,     0,
     571             :        0,    45,     6,    28,    29,    22,    18,    20,    26,    27,
     572             :       32,    34,     0,    17,    19,    21,    24,    25,    23,    12,
     573             :       13,    14,    15,    16,     0,     4,     0,     0,     0,    33,
     574             :       35,     0,    41,    44,     0,    46,     5,    43
     575             : };
     576             : 
     577             :   /* YYPGOTO[NTERM-NUM].  */
     578             : static const yytype_int8 yypgoto[] =
     579             : {
     580             :      -33,   -33,   -33,    -7,   -33,   -33,   -33
     581             : };
     582             : 
     583             :   /* YYDEFGOTO[NTERM-NUM].  */
     584             : static const yytype_int8 yydefgoto[] =
     585             : {
     586             :       -1,    13,    74,    14,    19,    15,    16
     587             : };
     588             : 
     589             :   /* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
     590             :      positive, shift that token.  If negative, reduce the rule whose
     591             :      number is the opposite.  If YYTABLE_NINF, syntax error.  */
     592             : static const yytype_int8 yytable[] =
     593             : {
     594             :       17,    18,    20,    21,    23,    24,    60,    81,    79,    82,
     595             :       61,    48,    80,    25,    49,    62,    50,    51,    47,    53,
     596             :       54,    55,    56,    57,    58,    59,    44,    45,    46,    63,
     597             :       64,    65,    66,    67,    68,    69,    70,    71,    72,    73,
     598             :       75,     0,    77,    78,    42,    43,    44,    45,    46,     1,
     599             :        2,    22,     3,     4,     5,     6,     0,     0,     7,     0,
     600             :        0,     0,     0,     0,     0,     8,     0,     1,     2,    83,
     601             :        3,     4,     5,     6,    86,     0,     7,    87,     9,    10,
     602             :       11,     0,     0,     8,     0,     0,    12,     0,     0,     0,
     603             :        0,     0,     0,     0,     0,     0,     9,    10,    11,     0,
     604             :        0,     0,    26,    27,    12,    28,    29,    30,    31,    32,
     605             :       33,     0,     0,     0,     0,     0,    34,    35,    36,    37,
     606             :       38,    39,    40,    41,     0,    42,    43,    44,    45,    46,
     607             :        0,    26,    27,    52,    28,    29,    30,    31,    32,    33,
     608             :        0,     0,    76,     0,     0,    34,    35,    36,    37,    38,
     609             :       39,    40,    41,     0,    42,    43,    44,    45,    46,    26,
     610             :       27,     0,    28,    29,    30,    31,    32,    33,     0,     0,
     611             :       84,     0,     0,    34,    35,    36,    37,    38,    39,    40,
     612             :       41,     0,    42,    43,    44,    45,    46,    26,    27,     0,
     613             :       28,    29,    30,    31,    32,    33,     0,     0,     0,     0,
     614             :       85,    34,    35,    36,    37,    38,    39,    40,    41,     0,
     615             :       42,    43,    44,    45,    46,    26,    27,     0,    28,    29,
     616             :       30,    31,    32,    33,     0,     0,     0,     0,     0,    34,
     617             :       35,    36,    37,    38,    39,    40,    41,     0,    42,    43,
     618             :       44,    45,    46,    26,     0,     0,    28,    29,    30,    31,
     619             :       32,    33,     0,     0,     0,     0,     0,    34,    35,    36,
     620             :       37,    38,    39,    40,    41,     0,    42,    43,    44,    45,
     621             :       46,    28,    29,    30,    31,    32,    33,     0,     0,     0,
     622             :        0,     0,    34,    35,    36,    37,    38,    39,    40,    41,
     623             :        0,    42,    43,    44,    45,    46,    -1,    -1,    -1,    31,
     624             :       32,     0,     0,     0,     0,     0,     0,     0,     0,    -1,
     625             :       -1,    -1,    39,    40,    41,     0,    42,    43,    44,    45,
     626             :       46
     627             : };
     628             : 
     629             : static const yytype_int8 yycheck[] =
     630             : {
     631             :        7,    20,     9,    10,    11,    12,     3,    39,     3,    41,
     632             :        7,    18,     7,     0,    20,    12,    22,    23,    40,    26,
     633             :       27,    28,    29,    30,    31,    32,    35,    36,    37,    36,
     634             :       37,    38,    39,    40,    41,    42,    43,    44,    45,    46,
     635             :       47,    -1,    49,    50,    33,    34,    35,    36,    37,     3,
     636             :        4,     5,     6,     7,     8,     9,    -1,    -1,    12,    -1,
     637             :       -1,    -1,    -1,    -1,    -1,    19,    -1,     3,     4,    76,
     638             :        6,     7,     8,     9,    81,    -1,    12,    84,    32,    33,
     639             :       34,    -1,    -1,    19,    -1,    -1,    40,    -1,    -1,    -1,
     640             :       -1,    -1,    -1,    -1,    -1,    -1,    32,    33,    34,    -1,
     641             :       -1,    -1,    10,    11,    40,    13,    14,    15,    16,    17,
     642             :       18,    -1,    -1,    -1,    -1,    -1,    24,    25,    26,    27,
     643             :       28,    29,    30,    31,    -1,    33,    34,    35,    36,    37,
     644             :       -1,    10,    11,    41,    13,    14,    15,    16,    17,    18,
     645             :       -1,    -1,    21,    -1,    -1,    24,    25,    26,    27,    28,
     646             :       29,    30,    31,    -1,    33,    34,    35,    36,    37,    10,
     647             :       11,    -1,    13,    14,    15,    16,    17,    18,    -1,    -1,
     648             :       21,    -1,    -1,    24,    25,    26,    27,    28,    29,    30,
     649             :       31,    -1,    33,    34,    35,    36,    37,    10,    11,    -1,
     650             :       13,    14,    15,    16,    17,    18,    -1,    -1,    -1,    -1,
     651             :       23,    24,    25,    26,    27,    28,    29,    30,    31,    -1,
     652             :       33,    34,    35,    36,    37,    10,    11,    -1,    13,    14,
     653             :       15,    16,    17,    18,    -1,    -1,    -1,    -1,    -1,    24,
     654             :       25,    26,    27,    28,    29,    30,    31,    -1,    33,    34,
     655             :       35,    36,    37,    10,    -1,    -1,    13,    14,    15,    16,
     656             :       17,    18,    -1,    -1,    -1,    -1,    -1,    24,    25,    26,
     657             :       27,    28,    29,    30,    31,    -1,    33,    34,    35,    36,
     658             :       37,    13,    14,    15,    16,    17,    18,    -1,    -1,    -1,
     659             :       -1,    -1,    24,    25,    26,    27,    28,    29,    30,    31,
     660             :       -1,    33,    34,    35,    36,    37,    13,    14,    15,    16,
     661             :       17,    -1,    -1,    -1,    -1,    -1,    -1,    -1,    -1,    26,
     662             :       27,    28,    29,    30,    31,    -1,    33,    34,    35,    36,
     663             :       37
     664             : };
     665             : 
     666             :   /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
     667             :      symbol of state STATE-NUM.  */
     668             : static const yytype_uint8 yystos[] =
     669             : {
     670             :        0,     3,     4,     6,     7,     8,     9,    12,    19,    32,
     671             :       33,    34,    40,    43,    45,    47,    48,    45,    20,    46,
     672             :       45,    45,     5,    45,    45,     0,    10,    11,    13,    14,
     673             :       15,    16,    17,    18,    24,    25,    26,    27,    28,    29,
     674             :       30,    31,    33,    34,    35,    36,    37,    40,    45,    20,
     675             :       22,    23,    41,    45,    45,    45,    45,    45,    45,    45,
     676             :        3,     7,    12,    45,    45,    45,    45,    45,    45,    45,
     677             :       45,    45,    45,    45,    44,    45,    21,    45,    45,     3,
     678             :        7,    39,    41,    45,    21,    23,    45,    45
     679             : };
     680             : 
     681             :   /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
     682             : static const yytype_uint8 yyr1[] =
     683             : {
     684             :        0,    42,    43,    44,    44,    44,    45,    45,    45,    45,
     685             :       45,    45,    45,    45,    45,    45,    45,    45,    45,    45,
     686             :       45,    45,    45,    45,    45,    45,    45,    45,    45,    45,
     687             :       45,    45,    45,    45,    45,    45,    45,    45,    45,    45,
     688             :       45,    45,    45,    46,    46,    47,    47,    48
     689             : };
     690             : 
     691             :   /* YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.  */
     692             : static const yytype_uint8 yyr2[] =
     693             : {
     694             :        0,     2,     1,     0,     1,     3,     3,     2,     2,     2,
     695             :        2,     2,     3,     3,     3,     3,     3,     3,     3,     3,
     696             :        3,     3,     3,     3,     3,     3,     3,     3,     3,     3,
     697             :        2,     2,     3,     4,     3,     4,     1,     1,     1,     1,
     698             :        1,     4,     1,     5,     4,     3,     5,     1
     699             : };
     700             : 
     701             : 
     702             : #define yyerrok         (yyerrstatus = 0)
     703             : #define yyclearin       (yychar = YYEMPTY)
     704             : #define YYEMPTY         (-2)
     705             : #define YYEOF           0
     706             : 
     707             : #define YYACCEPT        goto yyacceptlab
     708             : #define YYABORT         goto yyabortlab
     709             : #define YYERROR         goto yyerrorlab
     710             : 
     711             : 
     712             : #define YYRECOVERING()  (!!yyerrstatus)
     713             : 
     714             : #define YYBACKUP(Token, Value)                                  \
     715             : do                                                              \
     716             :   if (yychar == YYEMPTY)                                        \
     717             :     {                                                           \
     718             :       yychar = (Token);                                         \
     719             :       yylval = (Value);                                         \
     720             :       YYPOPSTACK (yylen);                                       \
     721             :       yystate = *yyssp;                                         \
     722             :       goto yybackup;                                            \
     723             :     }                                                           \
     724             :   else                                                          \
     725             :     {                                                           \
     726             :       yyerror (yyscanner, YY_("syntax error: cannot back up")); \
     727             :       YYERROR;                                                  \
     728             :     }                                                           \
     729             : while (0)
     730             : 
     731             : /* Error token number */
     732             : #define YYTERROR        1
     733             : #define YYERRCODE       256
     734             : 
     735             : 
     736             : 
     737             : /* Enable debugging if requested.  */
     738             : #if YYDEBUG
     739             : 
     740             : # ifndef YYFPRINTF
     741             : #  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
     742             : #  define YYFPRINTF fprintf
     743             : # endif
     744             : 
     745             : # define YYDPRINTF(Args)                        \
     746             : do {                                            \
     747             :   if (yydebug)                                  \
     748             :     YYFPRINTF Args;                             \
     749             : } while (0)
     750             : 
     751             : /* This macro is provided for backward compatibility. */
     752             : #ifndef YY_LOCATION_PRINT
     753             : # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
     754             : #endif
     755             : 
     756             : 
     757             : # define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
     758             : do {                                                                      \
     759             :   if (yydebug)                                                            \
     760             :     {                                                                     \
     761             :       YYFPRINTF (stderr, "%s ", Title);                                   \
     762             :       yy_symbol_print (stderr,                                            \
     763             :                   Type, Value, yyscanner); \
     764             :       YYFPRINTF (stderr, "\n");                                           \
     765             :     }                                                                     \
     766             : } while (0)
     767             : 
     768             : 
     769             : /*----------------------------------------.
     770             : | Print this symbol's value on YYOUTPUT.  |
     771             : `----------------------------------------*/
     772             : 
     773             : static void
     774             : yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep, yyscan_t yyscanner)
     775             : {
     776             :   FILE *yyo = yyoutput;
     777             :   YYUSE (yyo);
     778             :   YYUSE (yyscanner);
     779             :   if (!yyvaluep)
     780             :     return;
     781             : # ifdef YYPRINT
     782             :   if (yytype < YYNTOKENS)
     783             :     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
     784             : # endif
     785             :   YYUSE (yytype);
     786             : }
     787             : 
     788             : 
     789             : /*--------------------------------.
     790             : | Print this symbol on YYOUTPUT.  |
     791             : `--------------------------------*/
     792             : 
     793             : static void
     794             : yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep, yyscan_t yyscanner)
     795             : {
     796             :   YYFPRINTF (yyoutput, "%s %s (",
     797             :              yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]);
     798             : 
     799             :   yy_symbol_value_print (yyoutput, yytype, yyvaluep, yyscanner);
     800             :   YYFPRINTF (yyoutput, ")");
     801             : }
     802             : 
     803             : /*------------------------------------------------------------------.
     804             : | yy_stack_print -- Print the state stack from its BOTTOM up to its |
     805             : | TOP (included).                                                   |
     806             : `------------------------------------------------------------------*/
     807             : 
     808             : static void
     809             : yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop)
     810             : {
     811             :   YYFPRINTF (stderr, "Stack now");
     812             :   for (; yybottom <= yytop; yybottom++)
     813             :     {
     814             :       int yybot = *yybottom;
     815             :       YYFPRINTF (stderr, " %d", yybot);
     816             :     }
     817             :   YYFPRINTF (stderr, "\n");
     818             : }
     819             : 
     820             : # define YY_STACK_PRINT(Bottom, Top)                            \
     821             : do {                                                            \
     822             :   if (yydebug)                                                  \
     823             :     yy_stack_print ((Bottom), (Top));                           \
     824             : } while (0)
     825             : 
     826             : 
     827             : /*------------------------------------------------.
     828             : | Report that the YYRULE is going to be reduced.  |
     829             : `------------------------------------------------*/
     830             : 
     831             : static void
     832             : yy_reduce_print (yytype_int16 *yyssp, YYSTYPE *yyvsp, int yyrule, yyscan_t yyscanner)
     833             : {
     834             :   unsigned long int yylno = yyrline[yyrule];
     835             :   int yynrhs = yyr2[yyrule];
     836             :   int yyi;
     837             :   YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
     838             :              yyrule - 1, yylno);
     839             :   /* The symbols being reduced.  */
     840             :   for (yyi = 0; yyi < yynrhs; yyi++)
     841             :     {
     842             :       YYFPRINTF (stderr, "   $%d = ", yyi + 1);
     843             :       yy_symbol_print (stderr,
     844             :                        yystos[yyssp[yyi + 1 - yynrhs]],
     845             :                        &(yyvsp[(yyi + 1) - (yynrhs)])
     846             :                                               , yyscanner);
     847             :       YYFPRINTF (stderr, "\n");
     848             :     }
     849             : }
     850             : 
     851             : # define YY_REDUCE_PRINT(Rule)          \
     852             : do {                                    \
     853             :   if (yydebug)                          \
     854             :     yy_reduce_print (yyssp, yyvsp, Rule, yyscanner); \
     855             : } while (0)
     856             : 
     857             : /* Nonzero means print parse trace.  It is left uninitialized so that
     858             :    multiple parsers can coexist.  */
     859             : int yydebug;
     860             : #else /* !YYDEBUG */
     861             : # define YYDPRINTF(Args)
     862             : # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
     863             : # define YY_STACK_PRINT(Bottom, Top)
     864             : # define YY_REDUCE_PRINT(Rule)
     865             : #endif /* !YYDEBUG */
     866             : 
     867             : 
     868             : /* YYINITDEPTH -- initial size of the parser's stacks.  */
     869             : #ifndef YYINITDEPTH
     870             : # define YYINITDEPTH 200
     871             : #endif
     872             : 
     873             : /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
     874             :    if the built-in stack extension method is used).
     875             : 
     876             :    Do not make this value too large; the results are undefined if
     877             :    YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
     878             :    evaluated with infinite-precision integer arithmetic.  */
     879             : 
     880             : #ifndef YYMAXDEPTH
     881             : # define YYMAXDEPTH 10000
     882             : #endif
     883             : 
     884             : 
     885             : #if YYERROR_VERBOSE
     886             : 
     887             : # ifndef yystrlen
     888             : #  if defined __GLIBC__ && defined _STRING_H
     889             : #   define yystrlen strlen
     890             : #  else
     891             : /* Return the length of YYSTR.  */
     892             : static YYSIZE_T
     893             : yystrlen (const char *yystr)
     894             : {
     895             :   YYSIZE_T yylen;
     896             :   for (yylen = 0; yystr[yylen]; yylen++)
     897             :     continue;
     898             :   return yylen;
     899             : }
     900             : #  endif
     901             : # endif
     902             : 
     903             : # ifndef yystpcpy
     904             : #  if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
     905             : #   define yystpcpy stpcpy
     906             : #  else
     907             : /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
     908             :    YYDEST.  */
     909             : static char *
     910             : yystpcpy (char *yydest, const char *yysrc)
     911             : {
     912             :   char *yyd = yydest;
     913             :   const char *yys = yysrc;
     914             : 
     915             :   while ((*yyd++ = *yys++) != '\0')
     916             :     continue;
     917             : 
     918             :   return yyd - 1;
     919             : }
     920             : #  endif
     921             : # endif
     922             : 
     923             : # ifndef yytnamerr
     924             : /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
     925             :    quotes and backslashes, so that it's suitable for yyerror.  The
     926             :    heuristic is that double-quoting is unnecessary unless the string
     927             :    contains an apostrophe, a comma, or backslash (other than
     928             :    backslash-backslash).  YYSTR is taken from yytname.  If YYRES is
     929             :    null, do not copy; instead, return the length of what the result
     930             :    would have been.  */
     931             : static YYSIZE_T
     932             : yytnamerr (char *yyres, const char *yystr)
     933             : {
     934             :   if (*yystr == '"')
     935             :     {
     936             :       YYSIZE_T yyn = 0;
     937             :       char const *yyp = yystr;
     938             : 
     939             :       for (;;)
     940             :         switch (*++yyp)
     941             :           {
     942             :           case '\'':
     943             :           case ',':
     944             :             goto do_not_strip_quotes;
     945             : 
     946             :           case '\\':
     947             :             if (*++yyp != '\\')
     948             :               goto do_not_strip_quotes;
     949             :             /* Fall through.  */
     950             :           default:
     951             :             if (yyres)
     952             :               yyres[yyn] = *yyp;
     953             :             yyn++;
     954             :             break;
     955             : 
     956             :           case '"':
     957             :             if (yyres)
     958             :               yyres[yyn] = '\0';
     959             :             return yyn;
     960             :           }
     961             :     do_not_strip_quotes: ;
     962             :     }
     963             : 
     964             :   if (! yyres)
     965             :     return yystrlen (yystr);
     966             : 
     967             :   return yystpcpy (yyres, yystr) - yyres;
     968             : }
     969             : # endif
     970             : 
     971             : /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
     972             :    about the unexpected token YYTOKEN for the state stack whose top is
     973             :    YYSSP.
     974             : 
     975             :    Return 0 if *YYMSG was successfully written.  Return 1 if *YYMSG is
     976             :    not large enough to hold the message.  In that case, also set
     977             :    *YYMSG_ALLOC to the required number of bytes.  Return 2 if the
     978             :    required number of bytes is too large to store.  */
     979             : static int
     980             : yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
     981             :                 yytype_int16 *yyssp, int yytoken)
     982             : {
     983             :   YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
     984             :   YYSIZE_T yysize = yysize0;
     985             :   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
     986             :   /* Internationalized format string. */
     987             :   const char *yyformat = YY_NULLPTR;
     988             :   /* Arguments of yyformat. */
     989             :   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
     990             :   /* Number of reported tokens (one for the "unexpected", one per
     991             :      "expected"). */
     992             :   int yycount = 0;
     993             : 
     994             :   /* There are many possibilities here to consider:
     995             :      - If this state is a consistent state with a default action, then
     996             :        the only way this function was invoked is if the default action
     997             :        is an error action.  In that case, don't check for expected
     998             :        tokens because there are none.
     999             :      - The only way there can be no lookahead present (in yychar) is if
    1000             :        this state is a consistent state with a default action.  Thus,
    1001             :        detecting the absence of a lookahead is sufficient to determine
    1002             :        that there is no unexpected or expected token to report.  In that
    1003             :        case, just report a simple "syntax error".
    1004             :      - Don't assume there isn't a lookahead just because this state is a
    1005             :        consistent state with a default action.  There might have been a
    1006             :        previous inconsistent state, consistent state with a non-default
    1007             :        action, or user semantic action that manipulated yychar.
    1008             :      - Of course, the expected token list depends on states to have
    1009             :        correct lookahead information, and it depends on the parser not
    1010             :        to perform extra reductions after fetching a lookahead from the
    1011             :        scanner and before detecting a syntax error.  Thus, state merging
    1012             :        (from LALR or IELR) and default reductions corrupt the expected
    1013             :        token list.  However, the list is correct for canonical LR with
    1014             :        one exception: it will still contain any token that will not be
    1015             :        accepted due to an error action in a later state.
    1016             :   */
    1017             :   if (yytoken != YYEMPTY)
    1018             :     {
    1019             :       int yyn = yypact[*yyssp];
    1020             :       yyarg[yycount++] = yytname[yytoken];
    1021             :       if (!yypact_value_is_default (yyn))
    1022             :         {
    1023             :           /* Start YYX at -YYN if negative to avoid negative indexes in
    1024             :              YYCHECK.  In other words, skip the first -YYN actions for
    1025             :              this state because they are default actions.  */
    1026             :           int yyxbegin = yyn < 0 ? -yyn : 0;
    1027             :           /* Stay within bounds of both yycheck and yytname.  */
    1028             :           int yychecklim = YYLAST - yyn + 1;
    1029             :           int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
    1030             :           int yyx;
    1031             : 
    1032             :           for (yyx = yyxbegin; yyx < yyxend; ++yyx)
    1033             :             if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
    1034             :                 && !yytable_value_is_error (yytable[yyx + yyn]))
    1035             :               {
    1036             :                 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
    1037             :                   {
    1038             :                     yycount = 1;
    1039             :                     yysize = yysize0;
    1040             :                     break;
    1041             :                   }
    1042             :                 yyarg[yycount++] = yytname[yyx];
    1043             :                 {
    1044             :                   YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
    1045             :                   if (! (yysize <= yysize1
    1046             :                          && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
    1047             :                     return 2;
    1048             :                   yysize = yysize1;
    1049             :                 }
    1050             :               }
    1051             :         }
    1052             :     }
    1053             : 
    1054             :   switch (yycount)
    1055             :     {
    1056             : # define YYCASE_(N, S)                      \
    1057             :       case N:                               \
    1058             :         yyformat = S;                       \
    1059             :       break
    1060             :       YYCASE_(0, YY_("syntax error"));
    1061             :       YYCASE_(1, YY_("syntax error, unexpected %s"));
    1062             :       YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
    1063             :       YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
    1064             :       YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
    1065             :       YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
    1066             : # undef YYCASE_
    1067             :     }
    1068             : 
    1069             :   {
    1070             :     YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
    1071             :     if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
    1072             :       return 2;
    1073             :     yysize = yysize1;
    1074             :   }
    1075             : 
    1076             :   if (*yymsg_alloc < yysize)
    1077             :     {
    1078             :       *yymsg_alloc = 2 * yysize;
    1079             :       if (! (yysize <= *yymsg_alloc
    1080             :              && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
    1081             :         *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
    1082             :       return 1;
    1083             :     }
    1084             : 
    1085             :   /* Avoid sprintf, as that infringes on the user's name space.
    1086             :      Don't have undefined behavior even if the translation
    1087             :      produced a string with the wrong number of "%s"s.  */
    1088             :   {
    1089             :     char *yyp = *yymsg;
    1090             :     int yyi = 0;
    1091             :     while ((*yyp = *yyformat) != '\0')
    1092             :       if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
    1093             :         {
    1094             :           yyp += yytnamerr (yyp, yyarg[yyi++]);
    1095             :           yyformat += 2;
    1096             :         }
    1097             :       else
    1098             :         {
    1099             :           yyp++;
    1100             :           yyformat++;
    1101             :         }
    1102             :   }
    1103             :   return 0;
    1104             : }
    1105             : #endif /* YYERROR_VERBOSE */
    1106             : 
    1107             : /*-----------------------------------------------.
    1108             : | Release the memory associated to this symbol.  |
    1109             : `-----------------------------------------------*/
    1110             : 
    1111             : static void
    1112        1360 : yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep, yyscan_t yyscanner)
    1113             : {
    1114             :   YYUSE (yyvaluep);
    1115             :   YYUSE (yyscanner);
    1116        1360 :   if (!yymsg)
    1117           0 :     yymsg = "Deleting";
    1118             :   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
    1119             : 
    1120             :   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
    1121             :   YYUSE (yytype);
    1122             :   YY_IGNORE_MAYBE_UNINITIALIZED_END
    1123        1360 : }
    1124             : 
    1125             : 
    1126             : 
    1127             : 
    1128             : /*----------.
    1129             : | yyparse.  |
    1130             : `----------*/
    1131             : 
    1132             : int
    1133         712 : yyparse (yyscan_t yyscanner)
    1134             : {
    1135             : /* The lookahead symbol.  */
    1136             : int yychar;
    1137             : 
    1138             : 
    1139             : /* The semantic value of the lookahead symbol.  */
    1140             : /* Default value used for initialization, for pacifying older GCCs
    1141             :    or non-GCC compilers.  */
    1142             : YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
    1143             : YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);
    1144             : 
    1145             :     /* Number of syntax errors so far.  */
    1146             :     int yynerrs;
    1147             : 
    1148             :     int yystate;
    1149             :     /* Number of tokens to shift before error messages enabled.  */
    1150             :     int yyerrstatus;
    1151             : 
    1152             :     /* The stacks and their tools:
    1153             :        'yyss': related to states.
    1154             :        'yyvs': related to semantic values.
    1155             : 
    1156             :        Refer to the stacks through separate pointers, to allow yyoverflow
    1157             :        to reallocate them elsewhere.  */
    1158             : 
    1159             :     /* The state stack.  */
    1160             :     yytype_int16 yyssa[YYINITDEPTH];
    1161             :     yytype_int16 *yyss;
    1162             :     yytype_int16 *yyssp;
    1163             : 
    1164             :     /* The semantic value stack.  */
    1165             :     YYSTYPE yyvsa[YYINITDEPTH];
    1166             :     YYSTYPE *yyvs;
    1167             :     YYSTYPE *yyvsp;
    1168             : 
    1169             :     YYSIZE_T yystacksize;
    1170             : 
    1171             :   int yyn;
    1172             :   int yyresult;
    1173             :   /* Lookahead token as an internal (translated) token number.  */
    1174         712 :   int yytoken = 0;
    1175             :   /* The variables used to return semantic value and location from the
    1176             :      action routines.  */
    1177             :   YYSTYPE yyval;
    1178             : 
    1179             : #if YYERROR_VERBOSE
    1180             :   /* Buffer for error messages, and its allocated size.  */
    1181             :   char yymsgbuf[128];
    1182             :   char *yymsg = yymsgbuf;
    1183             :   YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
    1184             : #endif
    1185             : 
    1186             : #define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N))
    1187             : 
    1188             :   /* The number of symbols on the RHS of the reduced rule.
    1189             :      Keep to zero when no symbol should be popped.  */
    1190         712 :   int yylen = 0;
    1191             : 
    1192         712 :   yyssp = yyss = yyssa;
    1193         712 :   yyvsp = yyvs = yyvsa;
    1194         712 :   yystacksize = YYINITDEPTH;
    1195             : 
    1196             :   YYDPRINTF ((stderr, "Starting parse\n"));
    1197             : 
    1198         712 :   yystate = 0;
    1199         712 :   yyerrstatus = 0;
    1200         712 :   yynerrs = 0;
    1201         712 :   yychar = YYEMPTY; /* Cause a token to be read.  */
    1202         712 :   goto yysetstate;
    1203             : 
    1204             : /*------------------------------------------------------------.
    1205             : | yynewstate -- Push a new state, which is found in yystate.  |
    1206             : `------------------------------------------------------------*/
    1207             :  yynewstate:
    1208             :   /* In all cases, when you get here, the value and location stacks
    1209             :      have just been pushed.  So pushing a state here evens the stacks.  */
    1210       12528 :   yyssp++;
    1211             : 
    1212             :  yysetstate:
    1213       13240 :   *yyssp = yystate;
    1214             : 
    1215       13240 :   if (yyss + yystacksize - 1 <= yyssp)
    1216             :     {
    1217             :       /* Get the current used size of the three stacks, in elements.  */
    1218           0 :       YYSIZE_T yysize = yyssp - yyss + 1;
    1219             : 
    1220             : #ifdef yyoverflow
    1221             :       {
    1222             :         /* Give user a chance to reallocate the stack.  Use copies of
    1223             :            these so that the &'s don't force the real ones into
    1224             :            memory.  */
    1225             :         YYSTYPE *yyvs1 = yyvs;
    1226             :         yytype_int16 *yyss1 = yyss;
    1227             : 
    1228             :         /* Each stack pointer address is followed by the size of the
    1229             :            data in use in that stack, in bytes.  This used to be a
    1230             :            conditional around just the two extra args, but that might
    1231             :            be undefined if yyoverflow is a macro.  */
    1232             :         yyoverflow (YY_("memory exhausted"),
    1233             :                     &yyss1, yysize * sizeof (*yyssp),
    1234             :                     &yyvs1, yysize * sizeof (*yyvsp),
    1235             :                     &yystacksize);
    1236             : 
    1237             :         yyss = yyss1;
    1238             :         yyvs = yyvs1;
    1239             :       }
    1240             : #else /* no yyoverflow */
    1241             : # ifndef YYSTACK_RELOCATE
    1242             :       goto yyexhaustedlab;
    1243             : # else
    1244             :       /* Extend the stack our own way.  */
    1245           0 :       if (YYMAXDEPTH <= yystacksize)
    1246           0 :         goto yyexhaustedlab;
    1247           0 :       yystacksize *= 2;
    1248           0 :       if (YYMAXDEPTH < yystacksize)
    1249           0 :         yystacksize = YYMAXDEPTH;
    1250             : 
    1251             :       {
    1252           0 :         yytype_int16 *yyss1 = yyss;
    1253           0 :         union yyalloc *yyptr =
    1254           0 :           (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
    1255           0 :         if (! yyptr)
    1256           0 :           goto yyexhaustedlab;
    1257           0 :         YYSTACK_RELOCATE (yyss_alloc, yyss);
    1258           0 :         YYSTACK_RELOCATE (yyvs_alloc, yyvs);
    1259             : #  undef YYSTACK_RELOCATE
    1260           0 :         if (yyss1 != yyssa)
    1261           0 :           YYSTACK_FREE (yyss1);
    1262             :       }
    1263             : # endif
    1264             : #endif /* no yyoverflow */
    1265             : 
    1266           0 :       yyssp = yyss + yysize - 1;
    1267           0 :       yyvsp = yyvs + yysize - 1;
    1268             : 
    1269             :       YYDPRINTF ((stderr, "Stack size increased to %lu\n",
    1270             :                   (unsigned long int) yystacksize));
    1271             : 
    1272           0 :       if (yyss + yystacksize - 1 <= yyssp)
    1273           0 :         YYABORT;
    1274             :     }
    1275             : 
    1276             :   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
    1277             : 
    1278       13240 :   if (yystate == YYFINAL)
    1279         680 :     YYACCEPT;
    1280             : 
    1281       12560 :   goto yybackup;
    1282             : 
    1283             : /*-----------.
    1284             : | yybackup.  |
    1285             : `-----------*/
    1286             : yybackup:
    1287             : 
    1288             :   /* Do appropriate processing given the current state.  Read a
    1289             :      lookahead token if we need one and don't already have one.  */
    1290             : 
    1291             :   /* First try to decide what to do without reference to lookahead token.  */
    1292       12560 :   yyn = yypact[yystate];
    1293       12560 :   if (yypact_value_is_default (yyn))
    1294        3986 :     goto yydefault;
    1295             : 
    1296             :   /* Not known => get a lookahead token if don't already have one.  */
    1297             : 
    1298             :   /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
    1299        8574 :   if (yychar == YYEMPTY)
    1300             :     {
    1301             :       YYDPRINTF ((stderr, "Reading a token: "));
    1302        6382 :       yychar = yylex (&yylval, yyscanner);
    1303             :     }
    1304             : 
    1305        8566 :   if (yychar <= YYEOF)
    1306             :     {
    1307        1396 :       yychar = yytoken = YYEOF;
    1308             :       YYDPRINTF ((stderr, "Now at end of input.\n"));
    1309             :     }
    1310             :   else
    1311             :     {
    1312        7170 :       yytoken = YYTRANSLATE (yychar);
    1313             :       YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
    1314             :     }
    1315             : 
    1316             :   /* If the proper action on seeing token YYTOKEN is to reduce or to
    1317             :      detect an error, take that action.  */
    1318        8566 :   yyn += yytoken;
    1319        8566 :   if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
    1320             :     goto yydefault;
    1321        6364 :   yyn = yytable[yyn];
    1322        6364 :   if (yyn <= 0)
    1323             :     {
    1324           0 :       if (yytable_value_is_error (yyn))
    1325           0 :         goto yyerrlab;
    1326           0 :       yyn = -yyn;
    1327           0 :       goto yyreduce;
    1328             :     }
    1329             : 
    1330             :   /* Count tokens shifted since error; after three, turn off error
    1331             :      status.  */
    1332        6364 :   if (yyerrstatus)
    1333           0 :     yyerrstatus--;
    1334             : 
    1335             :   /* Shift the lookahead token.  */
    1336             :   YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
    1337             : 
    1338             :   /* Discard the shifted token.  */
    1339        6364 :   yychar = YYEMPTY;
    1340             : 
    1341        6364 :   yystate = yyn;
    1342             :   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
    1343        6364 :   *++yyvsp = yylval;
    1344             :   YY_IGNORE_MAYBE_UNINITIALIZED_END
    1345             : 
    1346        6364 :   goto yynewstate;
    1347             : 
    1348             : 
    1349             : /*-----------------------------------------------------------.
    1350             : | yydefault -- do the default action for the current state.  |
    1351             : `-----------------------------------------------------------*/
    1352             : yydefault:
    1353        6188 :   yyn = yydefact[yystate];
    1354        6188 :   if (yyn == 0)
    1355          10 :     goto yyerrlab;
    1356        6178 :   goto yyreduce;
    1357             : 
    1358             : 
    1359             : /*-----------------------------.
    1360             : | yyreduce -- Do a reduction.  |
    1361             : `-----------------------------*/
    1362             : yyreduce:
    1363             :   /* yyn is the number of a rule to reduce with.  */
    1364        6178 :   yylen = yyr2[yyn];
    1365             : 
    1366             :   /* If YYLEN is nonzero, implement the default value of the action:
    1367             :      '$$ = $1'.
    1368             : 
    1369             :      Otherwise, the following line sets YYVAL to garbage.
    1370             :      This behavior is undocumented and Bison
    1371             :      users should not rely upon it.  Assigning to YYVAL
    1372             :      unconditionally makes the parser a bit smaller, and it avoids a
    1373             :      GCC warning that YYVAL may be used uninitialized.  */
    1374        6178 :   yyval = yyvsp[1-yylen];
    1375             : 
    1376             : 
    1377             :   YY_REDUCE_PRINT (yyn);
    1378        6178 :   switch (yyn)
    1379             :     {
    1380             :         case 2:
    1381             : #line 82 "exprparse.y" /* yacc.c:1646  */
    1382             :     { expr_parse_result = (yyvsp[0].expr); }
    1383             : #line 1384 "exprparse.c" /* yacc.c:1646  */
    1384         680 :     break;
    1385             : 
    1386             :   case 3:
    1387             : #line 84 "exprparse.y" /* yacc.c:1646  */
    1388             :     { (yyval.elist) = NULL; }
    1389             : #line 1390 "exprparse.c" /* yacc.c:1646  */
    1390          10 :     break;
    1391             : 
    1392             :   case 4:
    1393             : #line 85 "exprparse.y" /* yacc.c:1646  */
    1394             :     { (yyval.elist) = make_elist((yyvsp[0].expr), NULL); }
    1395             : #line 1396 "exprparse.c" /* yacc.c:1646  */
    1396         650 :     break;
    1397             : 
    1398             :   case 5:
    1399             : #line 86 "exprparse.y" /* yacc.c:1646  */
    1400             :     { (yyval.elist) = make_elist((yyvsp[0].expr), (yyvsp[-2].elist)); }
    1401             : #line 1402 "exprparse.c" /* yacc.c:1646  */
    1402         552 :     break;
    1403             : 
    1404             :   case 6:
    1405             : #line 89 "exprparse.y" /* yacc.c:1646  */
    1406             :     { (yyval.expr) = (yyvsp[-1].expr); }
    1407             : #line 1408 "exprparse.c" /* yacc.c:1646  */
    1408         104 :     break;
    1409             : 
    1410             :   case 7:
    1411             : #line 90 "exprparse.y" /* yacc.c:1646  */
    1412             :     { (yyval.expr) = (yyvsp[0].expr); }
    1413             : #line 1414 "exprparse.c" /* yacc.c:1646  */
    1414           4 :     break;
    1415             : 
    1416             :   case 8:
    1417             : #line 92 "exprparse.y" /* yacc.c:1646  */
    1418             :     { (yyval.expr) = make_op(yyscanner, "-",
    1419             :                                            make_integer_constant(0), (yyvsp[0].expr)); }
    1420             : #line 1421 "exprparse.c" /* yacc.c:1646  */
    1421          88 :     break;
    1422             : 
    1423             :   case 9:
    1424             : #line 96 "exprparse.y" /* yacc.c:1646  */
    1425             :     { (yyval.expr) = make_integer_constant(PG_INT64_MIN); }
    1426             : #line 1427 "exprparse.c" /* yacc.c:1646  */
    1427           2 :     break;
    1428             : 
    1429             :   case 10:
    1430             : #line 98 "exprparse.y" /* yacc.c:1646  */
    1431             :     { (yyval.expr) = make_op(yyscanner, "#",
    1432             :                                            make_integer_constant(~INT64CONST(0)), (yyvsp[0].expr)); }
    1433             : #line 1434 "exprparse.c" /* yacc.c:1646  */
    1434           4 :     break;
    1435             : 
    1436             :   case 11:
    1437             : #line 100 "exprparse.y" /* yacc.c:1646  */
    1438             :     { (yyval.expr) = make_uop(yyscanner, "!not", (yyvsp[0].expr)); }
    1439             : #line 1440 "exprparse.c" /* yacc.c:1646  */
    1440          24 :     break;
    1441             : 
    1442             :   case 12:
    1443             : #line 101 "exprparse.y" /* yacc.c:1646  */
    1444             :     { (yyval.expr) = make_op(yyscanner, "+", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1445             : #line 1446 "exprparse.c" /* yacc.c:1646  */
    1446          42 :     break;
    1447             : 
    1448             :   case 13:
    1449             : #line 102 "exprparse.y" /* yacc.c:1646  */
    1450             :     { (yyval.expr) = make_op(yyscanner, "-", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1451             : #line 1452 "exprparse.c" /* yacc.c:1646  */
    1452          18 :     break;
    1453             : 
    1454             :   case 14:
    1455             : #line 103 "exprparse.y" /* yacc.c:1646  */
    1456             :     { (yyval.expr) = make_op(yyscanner, "*", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1457             : #line 1458 "exprparse.c" /* yacc.c:1646  */
    1458         402 :     break;
    1459             : 
    1460             :   case 15:
    1461             : #line 104 "exprparse.y" /* yacc.c:1646  */
    1462             :     { (yyval.expr) = make_op(yyscanner, "/", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1463             : #line 1464 "exprparse.c" /* yacc.c:1646  */
    1464          24 :     break;
    1465             : 
    1466             :   case 16:
    1467             : #line 105 "exprparse.y" /* yacc.c:1646  */
    1468             :     { (yyval.expr) = make_op(yyscanner, "mod", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1469             : #line 1470 "exprparse.c" /* yacc.c:1646  */
    1470           4 :     break;
    1471             : 
    1472             :   case 17:
    1473             : #line 106 "exprparse.y" /* yacc.c:1646  */
    1474             :     { (yyval.expr) = make_op(yyscanner, "<", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1475             : #line 1476 "exprparse.c" /* yacc.c:1646  */
    1476          18 :     break;
    1477             : 
    1478             :   case 18:
    1479             : #line 107 "exprparse.y" /* yacc.c:1646  */
    1480             :     { (yyval.expr) = make_op(yyscanner, "<=", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1481             : #line 1482 "exprparse.c" /* yacc.c:1646  */
    1482           6 :     break;
    1483             : 
    1484             :   case 19:
    1485             : #line 108 "exprparse.y" /* yacc.c:1646  */
    1486             :     { (yyval.expr) = make_op(yyscanner, "<", (yyvsp[0].expr), (yyvsp[-2].expr)); }
    1487             : #line 1488 "exprparse.c" /* yacc.c:1646  */
    1488          12 :     break;
    1489             : 
    1490             :   case 20:
    1491             : #line 109 "exprparse.y" /* yacc.c:1646  */
    1492             :     { (yyval.expr) = make_op(yyscanner, "<=", (yyvsp[0].expr), (yyvsp[-2].expr)); }
    1493             : #line 1494 "exprparse.c" /* yacc.c:1646  */
    1494           6 :     break;
    1495             : 
    1496             :   case 21:
    1497             : #line 110 "exprparse.y" /* yacc.c:1646  */
    1498             :     { (yyval.expr) = make_op(yyscanner, "=", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1499             : #line 1500 "exprparse.c" /* yacc.c:1646  */
    1500          26 :     break;
    1501             : 
    1502             :   case 22:
    1503             : #line 111 "exprparse.y" /* yacc.c:1646  */
    1504             :     { (yyval.expr) = make_op(yyscanner, "<>", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1505             : #line 1506 "exprparse.c" /* yacc.c:1646  */
    1506          14 :     break;
    1507             : 
    1508             :   case 23:
    1509             : #line 112 "exprparse.y" /* yacc.c:1646  */
    1510             :     { (yyval.expr) = make_op(yyscanner, "&", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1511             : #line 1512 "exprparse.c" /* yacc.c:1646  */
    1512           2 :     break;
    1513             : 
    1514             :   case 24:
    1515             : #line 113 "exprparse.y" /* yacc.c:1646  */
    1516             :     { (yyval.expr) = make_op(yyscanner, "|", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1517             : #line 1518 "exprparse.c" /* yacc.c:1646  */
    1518           4 :     break;
    1519             : 
    1520             :   case 25:
    1521             : #line 114 "exprparse.y" /* yacc.c:1646  */
    1522             :     { (yyval.expr) = make_op(yyscanner, "#", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1523             : #line 1524 "exprparse.c" /* yacc.c:1646  */
    1524           2 :     break;
    1525             : 
    1526             :   case 26:
    1527             : #line 115 "exprparse.y" /* yacc.c:1646  */
    1528             :     { (yyval.expr) = make_op(yyscanner, "<<", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1529             : #line 1530 "exprparse.c" /* yacc.c:1646  */
    1530          14 :     break;
    1531             : 
    1532             :   case 27:
    1533             : #line 116 "exprparse.y" /* yacc.c:1646  */
    1534             :     { (yyval.expr) = make_op(yyscanner, ">>", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1535             : #line 1536 "exprparse.c" /* yacc.c:1646  */
    1536           2 :     break;
    1537             : 
    1538             :   case 28:
    1539             : #line 117 "exprparse.y" /* yacc.c:1646  */
    1540             :     { (yyval.expr) = make_op(yyscanner, "!and", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1541             : #line 1542 "exprparse.c" /* yacc.c:1646  */
    1542          64 :     break;
    1543             : 
    1544             :   case 29:
    1545             : #line 118 "exprparse.y" /* yacc.c:1646  */
    1546             :     { (yyval.expr) = make_op(yyscanner, "!or", (yyvsp[-2].expr), (yyvsp[0].expr)); }
    1547             : #line 1548 "exprparse.c" /* yacc.c:1646  */
    1548          10 :     break;
    1549             : 
    1550             :   case 30:
    1551             : #line 120 "exprparse.y" /* yacc.c:1646  */
    1552             :     { (yyval.expr) = make_op(yyscanner, "!is", (yyvsp[-1].expr), make_null_constant()); }
    1553             : #line 1554 "exprparse.c" /* yacc.c:1646  */
    1554           2 :     break;
    1555             : 
    1556             :   case 31:
    1557             : #line 121 "exprparse.y" /* yacc.c:1646  */
    1558             :     {
    1559             :                                 (yyval.expr) = make_uop(yyscanner, "!not",
    1560             :                                               make_op(yyscanner, "!is", (yyvsp[-1].expr), make_null_constant()));
    1561             :                             }
    1562             : #line 1563 "exprparse.c" /* yacc.c:1646  */
    1563           2 :     break;
    1564             : 
    1565             :   case 32:
    1566             : #line 125 "exprparse.y" /* yacc.c:1646  */
    1567             :     { (yyval.expr) = make_op(yyscanner, "!is", (yyvsp[-2].expr), make_null_constant()); }
    1568             : #line 1569 "exprparse.c" /* yacc.c:1646  */
    1569           8 :     break;
    1570             : 
    1571             :   case 33:
    1572             : #line 127 "exprparse.y" /* yacc.c:1646  */
    1573             :     {
    1574             :                                 (yyval.expr) = make_uop(yyscanner, "!not",
    1575             :                                               make_op(yyscanner, "!is", (yyvsp[-3].expr), make_null_constant()));
    1576             :                             }
    1577             : #line 1578 "exprparse.c" /* yacc.c:1646  */
    1578           4 :     break;
    1579             : 
    1580             :   case 34:
    1581             : #line 132 "exprparse.y" /* yacc.c:1646  */
    1582             :     {
    1583             :                                 (yyval.expr) = make_op(yyscanner, "!is", (yyvsp[-2].expr), make_boolean_constant((yyvsp[0].bval)));
    1584             :                             }
    1585             : #line 1586 "exprparse.c" /* yacc.c:1646  */
    1586           2 :     break;
    1587             : 
    1588             :   case 35:
    1589             : #line 136 "exprparse.y" /* yacc.c:1646  */
    1590             :     {
    1591             :                                 (yyval.expr) = make_uop(yyscanner, "!not",
    1592             :                                               make_op(yyscanner, "!is", (yyvsp[-3].expr), make_boolean_constant((yyvsp[0].bval))));
    1593             :                             }
    1594             : #line 1595 "exprparse.c" /* yacc.c:1646  */
    1595           2 :     break;
    1596             : 
    1597             :   case 36:
    1598             : #line 141 "exprparse.y" /* yacc.c:1646  */
    1599             :     { (yyval.expr) = make_null_constant(); }
    1600             : #line 1601 "exprparse.c" /* yacc.c:1646  */
    1601          12 :     break;
    1602             : 
    1603             :   case 37:
    1604             : #line 142 "exprparse.y" /* yacc.c:1646  */
    1605             :     { (yyval.expr) = make_boolean_constant((yyvsp[0].bval)); }
    1606             : #line 1607 "exprparse.c" /* yacc.c:1646  */
    1607          40 :     break;
    1608             : 
    1609             :   case 38:
    1610             : #line 143 "exprparse.y" /* yacc.c:1646  */
    1611             :     { (yyval.expr) = make_integer_constant((yyvsp[0].ival)); }
    1612             : #line 1613 "exprparse.c" /* yacc.c:1646  */
    1613        1324 :     break;
    1614             : 
    1615             :   case 39:
    1616             : #line 144 "exprparse.y" /* yacc.c:1646  */
    1617             :     { (yyval.expr) = make_double_constant((yyvsp[0].dval)); }
    1618             : #line 1619 "exprparse.c" /* yacc.c:1646  */
    1619         122 :     break;
    1620             : 
    1621             :   case 40:
    1622             : #line 146 "exprparse.y" /* yacc.c:1646  */
    1623             :     { (yyval.expr) = make_variable((yyvsp[0].str)); }
    1624             : #line 1625 "exprparse.c" /* yacc.c:1646  */
    1625         462 :     break;
    1626             : 
    1627             :   case 41:
    1628             : #line 147 "exprparse.y" /* yacc.c:1646  */
    1629             :     { (yyval.expr) = make_func(yyscanner, (yyvsp[-3].ival), (yyvsp[-1].elist)); }
    1630             : #line 1631 "exprparse.c" /* yacc.c:1646  */
    1631         648 :     break;
    1632             : 
    1633             :   case 42:
    1634             : #line 148 "exprparse.y" /* yacc.c:1646  */
    1635             :     { (yyval.expr) = (yyvsp[0].expr); }
    1636             : #line 1637 "exprparse.c" /* yacc.c:1646  */
    1637          28 :     break;
    1638             : 
    1639             :   case 43:
    1640             : #line 152 "exprparse.y" /* yacc.c:1646  */
    1641             :     { (yyval.elist) = make_elist((yyvsp[0].expr), make_elist((yyvsp[-2].expr), (yyvsp[-4].elist))); }
    1642             : #line 1643 "exprparse.c" /* yacc.c:1646  */
    1643           4 :     break;
    1644             : 
    1645             :   case 44:
    1646             : #line 153 "exprparse.y" /* yacc.c:1646  */
    1647             :     { (yyval.elist) = make_elist((yyvsp[0].expr), make_elist((yyvsp[-2].expr), NULL)); }
    1648             : #line 1649 "exprparse.c" /* yacc.c:1646  */
    1649          28 :     break;
    1650             : 
    1651             :   case 45:
    1652             : #line 156 "exprparse.y" /* yacc.c:1646  */
    1653             :     { (yyval.expr) = make_case(yyscanner, (yyvsp[-1].elist), make_null_constant()); }
    1654             : #line 1655 "exprparse.c" /* yacc.c:1646  */
    1655           8 :     break;
    1656             : 
    1657             :   case 46:
    1658             : #line 157 "exprparse.y" /* yacc.c:1646  */
    1659             :     { (yyval.expr) = make_case(yyscanner, (yyvsp[-3].elist), (yyvsp[-1].expr)); }
    1660             : #line 1661 "exprparse.c" /* yacc.c:1646  */
    1661          20 :     break;
    1662             : 
    1663             :   case 47:
    1664             : #line 159 "exprparse.y" /* yacc.c:1646  */
    1665             :     { (yyval.ival) = find_func(yyscanner, (yyvsp[0].str)); pg_free((yyvsp[0].str)); }
    1666             : #line 1667 "exprparse.c" /* yacc.c:1646  */
    1667         660 :     break;
    1668             : 
    1669             : 
    1670             : #line 1671 "exprparse.c" /* yacc.c:1646  */
    1671           0 :       default: break;
    1672             :     }
    1673             :   /* User semantic actions sometimes alter yychar, and that requires
    1674             :      that yytoken be updated with the new translation.  We take the
    1675             :      approach of translating immediately before every use of yytoken.
    1676             :      One alternative is translating here after every semantic action,
    1677             :      but that translation would be missed if the semantic action invokes
    1678             :      YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
    1679             :      if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
    1680             :      incorrect destructor might then be invoked immediately.  In the
    1681             :      case of YYERROR or YYBACKUP, subsequent parser actions might lead
    1682             :      to an incorrect destructor call or verbose syntax error message
    1683             :      before the lookahead is translated.  */
    1684             :   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
    1685             : 
    1686        6164 :   YYPOPSTACK (yylen);
    1687        6164 :   yylen = 0;
    1688             :   YY_STACK_PRINT (yyss, yyssp);
    1689             : 
    1690        6164 :   *++yyvsp = yyval;
    1691             : 
    1692             :   /* Now 'shift' the result of the reduction.  Determine what state
    1693             :      that goes to, based on the state we popped back to and the rule
    1694             :      number reduced by.  */
    1695             : 
    1696        6164 :   yyn = yyr1[yyn];
    1697             : 
    1698        6164 :   yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
    1699        6164 :   if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
    1700        2834 :     yystate = yytable[yystate];
    1701             :   else
    1702        3330 :     yystate = yydefgoto[yyn - YYNTOKENS];
    1703             : 
    1704        6164 :   goto yynewstate;
    1705             : 
    1706             : 
    1707             : /*--------------------------------------.
    1708             : | yyerrlab -- here on detecting error.  |
    1709             : `--------------------------------------*/
    1710             : yyerrlab:
    1711             :   /* Make sure we have latest lookahead translation.  See comments at
    1712             :      user semantic actions for why this is necessary.  */
    1713          10 :   yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
    1714             : 
    1715             :   /* If not already recovering from an error, report this error.  */
    1716          10 :   if (!yyerrstatus)
    1717             :     {
    1718          10 :       ++yynerrs;
    1719             : #if ! YYERROR_VERBOSE
    1720          10 :       yyerror (yyscanner, YY_("syntax error"));
    1721             : #else
    1722             : # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \
    1723             :                                         yyssp, yytoken)
    1724             :       {
    1725             :         char const *yymsgp = YY_("syntax error");
    1726             :         int yysyntax_error_status;
    1727             :         yysyntax_error_status = YYSYNTAX_ERROR;
    1728             :         if (yysyntax_error_status == 0)
    1729             :           yymsgp = yymsg;
    1730             :         else if (yysyntax_error_status == 1)
    1731             :           {
    1732             :             if (yymsg != yymsgbuf)
    1733             :               YYSTACK_FREE (yymsg);
    1734             :             yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
    1735             :             if (!yymsg)
    1736             :               {
    1737             :                 yymsg = yymsgbuf;
    1738             :                 yymsg_alloc = sizeof yymsgbuf;
    1739             :                 yysyntax_error_status = 2;
    1740             :               }
    1741             :             else
    1742             :               {
    1743             :                 yysyntax_error_status = YYSYNTAX_ERROR;
    1744             :                 yymsgp = yymsg;
    1745             :               }
    1746             :           }
    1747             :         yyerror (yyscanner, yymsgp);
    1748             :         if (yysyntax_error_status == 2)
    1749             :           goto yyexhaustedlab;
    1750             :       }
    1751             : # undef YYSYNTAX_ERROR
    1752             : #endif
    1753             :     }
    1754             : 
    1755             : 
    1756             : 
    1757           0 :   if (yyerrstatus == 3)
    1758             :     {
    1759             :       /* If just tried and failed to reuse lookahead token after an
    1760             :          error, discard it.  */
    1761             : 
    1762           0 :       if (yychar <= YYEOF)
    1763             :         {
    1764             :           /* Return failure if at end of input.  */
    1765           0 :           if (yychar == YYEOF)
    1766           0 :             YYABORT;
    1767             :         }
    1768             :       else
    1769             :         {
    1770           0 :           yydestruct ("Error: discarding",
    1771             :                       yytoken, &yylval, yyscanner);
    1772           0 :           yychar = YYEMPTY;
    1773             :         }
    1774             :     }
    1775             : 
    1776             :   /* Else will try to reuse lookahead token after shifting the error
    1777             :      token.  */
    1778           0 :   goto yyerrlab1;
    1779             : 
    1780             : 
    1781             : /*---------------------------------------------------.
    1782             : | yyerrorlab -- error raised explicitly by YYERROR.  |
    1783             : `---------------------------------------------------*/
    1784             : yyerrorlab:
    1785             : 
    1786             :   /* Pacify compilers like GCC when the user code never invokes
    1787             :      YYERROR and the label yyerrorlab therefore never appears in user
    1788             :      code.  */
    1789             :   if (/*CONSTCOND*/ 0)
    1790             :      goto yyerrorlab;
    1791             : 
    1792             :   /* Do not reclaim the symbols of the rule whose action triggered
    1793             :      this YYERROR.  */
    1794             :   YYPOPSTACK (yylen);
    1795             :   yylen = 0;
    1796             :   YY_STACK_PRINT (yyss, yyssp);
    1797             :   yystate = *yyssp;
    1798             :   goto yyerrlab1;
    1799             : 
    1800             : 
    1801             : /*-------------------------------------------------------------.
    1802             : | yyerrlab1 -- common code for both syntax error and YYERROR.  |
    1803             : `-------------------------------------------------------------*/
    1804             : yyerrlab1:
    1805           0 :   yyerrstatus = 3;      /* Each real token shifted decrements this.  */
    1806             : 
    1807             :   for (;;)
    1808             :     {
    1809           0 :       yyn = yypact[yystate];
    1810           0 :       if (!yypact_value_is_default (yyn))
    1811             :         {
    1812           0 :           yyn += YYTERROR;
    1813           0 :           if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
    1814             :             {
    1815           0 :               yyn = yytable[yyn];
    1816           0 :               if (0 < yyn)
    1817           0 :                 break;
    1818             :             }
    1819             :         }
    1820             : 
    1821             :       /* Pop the current state because it cannot handle the error token.  */
    1822           0 :       if (yyssp == yyss)
    1823           0 :         YYABORT;
    1824             : 
    1825             : 
    1826           0 :       yydestruct ("Error: popping",
    1827           0 :                   yystos[yystate], yyvsp, yyscanner);
    1828           0 :       YYPOPSTACK (1);
    1829           0 :       yystate = *yyssp;
    1830             :       YY_STACK_PRINT (yyss, yyssp);
    1831             :     }
    1832             : 
    1833             :   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
    1834           0 :   *++yyvsp = yylval;
    1835             :   YY_IGNORE_MAYBE_UNINITIALIZED_END
    1836             : 
    1837             : 
    1838             :   /* Shift the error token.  */
    1839             :   YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
    1840             : 
    1841           0 :   yystate = yyn;
    1842           0 :   goto yynewstate;
    1843             : 
    1844             : 
    1845             : /*-------------------------------------.
    1846             : | yyacceptlab -- YYACCEPT comes here.  |
    1847             : `-------------------------------------*/
    1848             : yyacceptlab:
    1849         680 :   yyresult = 0;
    1850         680 :   goto yyreturn;
    1851             : 
    1852             : /*-----------------------------------.
    1853             : | yyabortlab -- YYABORT comes here.  |
    1854             : `-----------------------------------*/
    1855             : yyabortlab:
    1856           0 :   yyresult = 1;
    1857           0 :   goto yyreturn;
    1858             : 
    1859             : #if !defined yyoverflow || YYERROR_VERBOSE
    1860             : /*-------------------------------------------------.
    1861             : | yyexhaustedlab -- memory exhaustion comes here.  |
    1862             : `-------------------------------------------------*/
    1863             : yyexhaustedlab:
    1864           0 :   yyerror (yyscanner, YY_("memory exhausted"));
    1865             :   yyresult = 2;
    1866             :   /* Fall through.  */
    1867             : #endif
    1868             : 
    1869             : yyreturn:
    1870         680 :   if (yychar != YYEMPTY)
    1871             :     {
    1872             :       /* Make sure we have latest lookahead translation.  See comments at
    1873             :          user semantic actions for why this is necessary.  */
    1874           0 :       yytoken = YYTRANSLATE (yychar);
    1875           0 :       yydestruct ("Cleanup: discarding lookahead",
    1876             :                   yytoken, &yylval, yyscanner);
    1877             :     }
    1878             :   /* Do not reclaim the symbols of the rule whose action triggered
    1879             :      this YYABORT or YYACCEPT.  */
    1880         680 :   YYPOPSTACK (yylen);
    1881             :   YY_STACK_PRINT (yyss, yyssp);
    1882        2720 :   while (yyssp != yyss)
    1883             :     {
    1884        1360 :       yydestruct ("Cleanup: popping",
    1885        1360 :                   yystos[*yyssp], yyvsp, yyscanner);
    1886        1360 :       YYPOPSTACK (1);
    1887             :     }
    1888             : #ifndef yyoverflow
    1889         680 :   if (yyss != yyssa)
    1890           0 :     YYSTACK_FREE (yyss);
    1891             : #endif
    1892             : #if YYERROR_VERBOSE
    1893             :   if (yymsg != yymsgbuf)
    1894             :     YYSTACK_FREE (yymsg);
    1895             : #endif
    1896         680 :   return yyresult;
    1897             : }
    1898             : #line 162 "exprparse.y" /* yacc.c:1906  */
    1899             : 
    1900             : 
    1901             : static PgBenchExpr *
    1902             : make_null_constant(void)
    1903             : {
    1904             :     PgBenchExpr *expr = pg_malloc(sizeof(PgBenchExpr));
    1905             : 
    1906             :     expr->etype = ENODE_CONSTANT;
    1907             :     expr->u.constant.type = PGBT_NULL;
    1908             :     expr->u.constant.u.ival = 0;
    1909             :     return expr;
    1910             : }
    1911             : 
    1912             : static PgBenchExpr *
    1913             : make_integer_constant(int64 ival)
    1914             : {
    1915             :     PgBenchExpr *expr = pg_malloc(sizeof(PgBenchExpr));
    1916             : 
    1917             :     expr->etype = ENODE_CONSTANT;
    1918             :     expr->u.constant.type = PGBT_INT;
    1919             :     expr->u.constant.u.ival = ival;
    1920             :     return expr;
    1921             : }
    1922             : 
    1923             : static PgBenchExpr *
    1924             : make_double_constant(double dval)
    1925             : {
    1926             :     PgBenchExpr *expr = pg_malloc(sizeof(PgBenchExpr));
    1927             : 
    1928             :     expr->etype = ENODE_CONSTANT;
    1929             :     expr->u.constant.type = PGBT_DOUBLE;
    1930             :     expr->u.constant.u.dval = dval;
    1931             :     return expr;
    1932             : }
    1933             : 
    1934             : static PgBenchExpr *
    1935             : make_boolean_constant(bool bval)
    1936             : {
    1937             :     PgBenchExpr *expr = pg_malloc(sizeof(PgBenchExpr));
    1938             : 
    1939             :     expr->etype = ENODE_CONSTANT;
    1940             :     expr->u.constant.type = PGBT_BOOLEAN;
    1941             :     expr->u.constant.u.bval = bval;
    1942             :     return expr;
    1943             : }
    1944             : 
    1945             : static PgBenchExpr *
    1946             : make_variable(char *varname)
    1947             : {
    1948             :     PgBenchExpr *expr = pg_malloc(sizeof(PgBenchExpr));
    1949             : 
    1950             :     expr->etype = ENODE_VARIABLE;
    1951             :     expr->u.variable.varname = varname;
    1952             :     return expr;
    1953             : }
    1954             : 
    1955             : /* binary operators */
    1956             : static PgBenchExpr *
    1957             : make_op(yyscan_t yyscanner, const char *operator,
    1958             :         PgBenchExpr *lexpr, PgBenchExpr *rexpr)
    1959             : {
    1960             :     return make_func(yyscanner, find_func(yyscanner, operator),
    1961             :                      make_elist(rexpr, make_elist(lexpr, NULL)));
    1962             : }
    1963             : 
    1964             : /* unary operator */
    1965             : static PgBenchExpr *
    1966             : make_uop(yyscan_t yyscanner, const char *operator, PgBenchExpr *expr)
    1967             : {
    1968             :     return make_func(yyscanner, find_func(yyscanner, operator), make_elist(expr, NULL));
    1969             : }
    1970             : 
    1971             : /*
    1972             :  * List of available functions:
    1973             :  * - fname: function name, "!..." for special internal functions
    1974             :  * - nargs: number of arguments. Special cases:
    1975             :  *          - PGBENCH_NARGS_VARIABLE is a special value for least & greatest
    1976             :  *            meaning #args >= 1;
    1977             :  *          - PGBENCH_NARGS_CASE is for the "CASE WHEN ..." function, which
    1978             :  *            has #args >= 3 and odd;
    1979             :  *          - PGBENCH_NARGS_HASH is for hash functions, which have one required
    1980             :  *            and one optional argument;
    1981             :  * - tag: function identifier from PgBenchFunction enum
    1982             :  */
    1983             : static const struct
    1984             : {
    1985             :     const char *fname;
    1986             :     int         nargs;
    1987             :     PgBenchFunction tag;
    1988             : }   PGBENCH_FUNCTIONS[] =
    1989             : {
    1990             :     /* parsed as operators, executed as functions */
    1991             :     {
    1992             :         "+", 2, PGBENCH_ADD
    1993             :     },
    1994             :     {
    1995             :         "-", 2, PGBENCH_SUB
    1996             :     },
    1997             :     {
    1998             :         "*", 2, PGBENCH_MUL
    1999             :     },
    2000             :     {
    2001             :         "/", 2, PGBENCH_DIV
    2002             :     },
    2003             :     {
    2004             :         "mod", 2, PGBENCH_MOD
    2005             :     },
    2006             :     /* actual functions */
    2007             :     {
    2008             :         "abs", 1, PGBENCH_ABS
    2009             :     },
    2010             :     {
    2011             :         "least", PGBENCH_NARGS_VARIABLE, PGBENCH_LEAST
    2012             :     },
    2013             :     {
    2014             :         "greatest", PGBENCH_NARGS_VARIABLE, PGBENCH_GREATEST
    2015             :     },
    2016             :     {
    2017             :         "debug", 1, PGBENCH_DEBUG
    2018             :     },
    2019             :     {
    2020             :         "pi", 0, PGBENCH_PI
    2021             :     },
    2022             :     {
    2023             :         "sqrt", 1, PGBENCH_SQRT
    2024             :     },
    2025             :     {
    2026             :         "ln", 1, PGBENCH_LN
    2027             :     },
    2028             :     {
    2029             :         "exp", 1, PGBENCH_EXP
    2030             :     },
    2031             :     {
    2032             :         "int", 1, PGBENCH_INT
    2033             :     },
    2034             :     {
    2035             :         "double", 1, PGBENCH_DOUBLE
    2036             :     },
    2037             :     {
    2038             :         "random", 2, PGBENCH_RANDOM
    2039             :     },
    2040             :     {
    2041             :         "random_gaussian", 3, PGBENCH_RANDOM_GAUSSIAN
    2042             :     },
    2043             :     {
    2044             :         "random_exponential", 3, PGBENCH_RANDOM_EXPONENTIAL
    2045             :     },
    2046             :     {
    2047             :         "random_zipfian", 3, PGBENCH_RANDOM_ZIPFIAN
    2048             :     },
    2049             :     {
    2050             :         "pow", 2, PGBENCH_POW
    2051             :     },
    2052             :     {
    2053             :         "power", 2, PGBENCH_POW
    2054             :     },
    2055             :     /* logical operators */
    2056             :     {
    2057             :         "!and", 2, PGBENCH_AND
    2058             :     },
    2059             :     {
    2060             :         "!or", 2, PGBENCH_OR
    2061             :     },
    2062             :     {
    2063             :         "!not", 1, PGBENCH_NOT
    2064             :     },
    2065             :     /* bitwise integer operators */
    2066             :     {
    2067             :         "&", 2, PGBENCH_BITAND
    2068             :     },
    2069             :     {
    2070             :         "|", 2, PGBENCH_BITOR
    2071             :     },
    2072             :     {
    2073             :         "#", 2, PGBENCH_BITXOR
    2074             :     },
    2075             :     {
    2076             :         "<<", 2, PGBENCH_LSHIFT
    2077             :     },
    2078             :     {
    2079             :         ">>", 2, PGBENCH_RSHIFT
    2080             :     },
    2081             :     /* comparison operators */
    2082             :     {
    2083             :         "=", 2, PGBENCH_EQ
    2084             :     },
    2085             :     {
    2086             :         "<>", 2, PGBENCH_NE
    2087             :     },
    2088             :     {
    2089             :         "<=", 2, PGBENCH_LE
    2090             :     },
    2091             :     {
    2092             :         "<", 2, PGBENCH_LT
    2093             :     },
    2094             :     {
    2095             :         "!is", 2, PGBENCH_IS
    2096             :     },
    2097             :     /* "case when ... then ... else ... end" construction */
    2098             :     {
    2099             :         "!case_end", PGBENCH_NARGS_CASE, PGBENCH_CASE
    2100             :     },
    2101             :     {
    2102             :         "hash", PGBENCH_NARGS_HASH, PGBENCH_HASH_MURMUR2
    2103             :     },
    2104             :     {
    2105             :         "hash_murmur2", PGBENCH_NARGS_HASH, PGBENCH_HASH_MURMUR2
    2106             :     },
    2107             :     {
    2108             :         "hash_fnv1a", PGBENCH_NARGS_HASH, PGBENCH_HASH_FNV1A
    2109             :     },
    2110             :     /* keep as last array element */
    2111             :     {
    2112             :         NULL, 0, 0
    2113             :     }
    2114             : };
    2115             : 
    2116             : /*
    2117             :  * Find a function from its name
    2118             :  *
    2119             :  * return the index of the function from the PGBENCH_FUNCTIONS array
    2120             :  * or fail if the function is unknown.
    2121             :  */
    2122             : static int
    2123             : find_func(yyscan_t yyscanner, const char *fname)
    2124             : {
    2125             :     int         i = 0;
    2126             : 
    2127             :     while (PGBENCH_FUNCTIONS[i].fname)
    2128             :     {
    2129             :         if (pg_strcasecmp(fname, PGBENCH_FUNCTIONS[i].fname) == 0)
    2130             :             return i;
    2131             :         i++;
    2132             :     }
    2133             : 
    2134             :     expr_yyerror_more(yyscanner, "unexpected function name", fname);
    2135             : 
    2136             :     /* not reached */
    2137             :     return -1;
    2138             : }
    2139             : 
    2140             : /* Expression linked list builder */
    2141             : static PgBenchExprList *
    2142             : make_elist(PgBenchExpr *expr, PgBenchExprList *list)
    2143             : {
    2144             :     PgBenchExprLink *cons;
    2145             : 
    2146             :     if (list == NULL)
    2147             :     {
    2148             :         list = pg_malloc(sizeof(PgBenchExprList));
    2149             :         list->head = NULL;
    2150             :         list->tail = NULL;
    2151             :     }
    2152             : 
    2153             :     cons = pg_malloc(sizeof(PgBenchExprLink));
    2154             :     cons->expr = expr;
    2155             :     cons->next = NULL;
    2156             : 
    2157             :     if (list->head == NULL)
    2158             :         list->head = cons;
    2159             :     else
    2160             :         list->tail->next = cons;
    2161             : 
    2162             :     list->tail = cons;
    2163             : 
    2164             :     return list;
    2165             : }
    2166             : 
    2167             : /* Return the length of an expression list */
    2168             : static int
    2169             : elist_length(PgBenchExprList *list)
    2170             : {
    2171             :     PgBenchExprLink *link = list != NULL ? list->head : NULL;
    2172             :     int         len = 0;
    2173             : 
    2174             :     for (; link != NULL; link = link->next)
    2175             :         len++;
    2176             : 
    2177             :     return len;
    2178             : }
    2179             : 
    2180             : /* Build function call expression */
    2181             : static PgBenchExpr *
    2182             : make_func(yyscan_t yyscanner, int fnumber, PgBenchExprList *args)
    2183             : {
    2184             :     int len = elist_length(args);
    2185             : 
    2186             :     PgBenchExpr *expr = pg_malloc(sizeof(PgBenchExpr));
    2187             : 
    2188             :     Assert(fnumber >= 0);
    2189             : 
    2190             :     /* validate arguments number including few special cases */
    2191             :     switch (PGBENCH_FUNCTIONS[fnumber].nargs)
    2192             :     {
    2193             :         /* check at least one arg for least & greatest */
    2194             :         case PGBENCH_NARGS_VARIABLE:
    2195             :             if (len == 0)
    2196             :                 expr_yyerror_more(yyscanner, "at least one argument expected",
    2197             :                                   PGBENCH_FUNCTIONS[fnumber].fname);
    2198             :             break;
    2199             : 
    2200             :         /* case (when ... then ...)+ (else ...)? end */
    2201             :         case PGBENCH_NARGS_CASE:
    2202             :             /* 'else' branch is always present, but could be a NULL-constant */
    2203             :             if (len < 3 || len % 2 != 1)
    2204             :                 expr_yyerror_more(yyscanner,
    2205             :                                   "odd and >= 3 number of arguments expected",
    2206             :                                   "case control structure");
    2207             :             break;
    2208             : 
    2209             :         /* hash functions with optional seed argument */
    2210             :         case PGBENCH_NARGS_HASH:
    2211             :             if (len < 1 || len > 2)
    2212             :                 expr_yyerror_more(yyscanner, "unexpected number of arguments",
    2213             :                                   PGBENCH_FUNCTIONS[fnumber].fname);
    2214             : 
    2215             :             if (len == 1)
    2216             :             {
    2217             :                 PgBenchExpr *var = make_variable("default_seed");
    2218             :                 args = make_elist(var, args);
    2219             :             }
    2220             :             break;
    2221             : 
    2222             :         /* common case: positive arguments number */
    2223             :         default:
    2224             :             Assert(PGBENCH_FUNCTIONS[fnumber].nargs >= 0);
    2225             : 
    2226             :             if (PGBENCH_FUNCTIONS[fnumber].nargs != len)
    2227             :                 expr_yyerror_more(yyscanner, "unexpected number of arguments",
    2228             :                                   PGBENCH_FUNCTIONS[fnumber].fname);
    2229             :     }
    2230             : 
    2231             :     expr->etype = ENODE_FUNCTION;
    2232             :     expr->u.function.function = PGBENCH_FUNCTIONS[fnumber].tag;
    2233             : 
    2234             :     /* only the link is used, the head/tail is not useful anymore */
    2235             :     expr->u.function.args = args != NULL ? args->head : NULL;
    2236             :     if (args)
    2237             :         pg_free(args);
    2238             : 
    2239             :     return expr;
    2240             : }
    2241             : 
    2242             : static PgBenchExpr *
    2243             : make_case(yyscan_t yyscanner, PgBenchExprList *when_then_list, PgBenchExpr *else_part)
    2244             : {
    2245             :     return make_func(yyscanner,
    2246             :                      find_func(yyscanner, "!case_end"),
    2247             :                      make_elist(else_part, when_then_list));
    2248             : }
    2249             : 
    2250             : /*
    2251             :  * exprscan.l is compiled as part of exprparse.y.  Currently, this is
    2252             :  * unavoidable because exprparse does not create a .h file to export
    2253             :  * its token symbols.  If these files ever grow large enough to be
    2254             :  * worth compiling separately, that could be fixed; but for now it
    2255             :  * seems like useless complication.
    2256             :  */
    2257             : 
    2258             : /* First, get rid of "#define yyscan_t" from pgbench.h */
    2259             : #undef yyscan_t
    2260             : /* ... and the yylval macro, which flex will have its own definition for */
    2261             : #undef yylval
    2262             : 
    2263             : #include "exprscan.c"

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