Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * file_fdw.c
4 : * foreign-data wrapper for server-side flat files (or programs).
5 : *
6 : * Copyright (c) 2010-2024, PostgreSQL Global Development Group
7 : *
8 : * IDENTIFICATION
9 : * contrib/file_fdw/file_fdw.c
10 : *
11 : *-------------------------------------------------------------------------
12 : */
13 : #include "postgres.h"
14 :
15 : #include <sys/stat.h>
16 : #include <unistd.h>
17 :
18 : #include "access/htup_details.h"
19 : #include "access/reloptions.h"
20 : #include "access/sysattr.h"
21 : #include "access/table.h"
22 : #include "catalog/pg_authid.h"
23 : #include "catalog/pg_foreign_table.h"
24 : #include "commands/copy.h"
25 : #include "commands/copyfrom_internal.h"
26 : #include "commands/defrem.h"
27 : #include "commands/explain.h"
28 : #include "commands/vacuum.h"
29 : #include "foreign/fdwapi.h"
30 : #include "foreign/foreign.h"
31 : #include "miscadmin.h"
32 : #include "nodes/makefuncs.h"
33 : #include "optimizer/optimizer.h"
34 : #include "optimizer/pathnode.h"
35 : #include "optimizer/planmain.h"
36 : #include "optimizer/restrictinfo.h"
37 : #include "utils/acl.h"
38 : #include "utils/memutils.h"
39 : #include "utils/rel.h"
40 : #include "utils/sampling.h"
41 : #include "utils/varlena.h"
42 :
43 2 : PG_MODULE_MAGIC;
44 :
45 : /*
46 : * Describes the valid options for objects that use this wrapper.
47 : */
48 : struct FileFdwOption
49 : {
50 : const char *optname;
51 : Oid optcontext; /* Oid of catalog in which option may appear */
52 : };
53 :
54 : /*
55 : * Valid options for file_fdw.
56 : * These options are based on the options for the COPY FROM command.
57 : * But note that force_not_null and force_null are handled as boolean options
58 : * attached to a column, not as table options.
59 : *
60 : * Note: If you are adding new option for user mapping, you need to modify
61 : * fileGetOptions(), which currently doesn't bother to look at user mappings.
62 : */
63 : static const struct FileFdwOption valid_options[] = {
64 : /* Data source options */
65 : {"filename", ForeignTableRelationId},
66 : {"program", ForeignTableRelationId},
67 :
68 : /* Format options */
69 : /* oids option is not supported */
70 : {"format", ForeignTableRelationId},
71 : {"header", ForeignTableRelationId},
72 : {"delimiter", ForeignTableRelationId},
73 : {"quote", ForeignTableRelationId},
74 : {"escape", ForeignTableRelationId},
75 : {"null", ForeignTableRelationId},
76 : {"default", ForeignTableRelationId},
77 : {"encoding", ForeignTableRelationId},
78 : {"on_error", ForeignTableRelationId},
79 : {"log_verbosity", ForeignTableRelationId},
80 : {"reject_limit", ForeignTableRelationId},
81 : {"force_not_null", AttributeRelationId},
82 : {"force_null", AttributeRelationId},
83 :
84 : /*
85 : * force_quote is not supported by file_fdw because it's for COPY TO.
86 : */
87 :
88 : /* Sentinel */
89 : {NULL, InvalidOid}
90 : };
91 :
92 : /*
93 : * FDW-specific information for RelOptInfo.fdw_private.
94 : */
95 : typedef struct FileFdwPlanState
96 : {
97 : char *filename; /* file or program to read from */
98 : bool is_program; /* true if filename represents an OS command */
99 : List *options; /* merged COPY options, excluding filename and
100 : * is_program */
101 : BlockNumber pages; /* estimate of file's physical size */
102 : double ntuples; /* estimate of number of data rows */
103 : } FileFdwPlanState;
104 :
105 : /*
106 : * FDW-specific information for ForeignScanState.fdw_state.
107 : */
108 : typedef struct FileFdwExecutionState
109 : {
110 : char *filename; /* file or program to read from */
111 : bool is_program; /* true if filename represents an OS command */
112 : List *options; /* merged COPY options, excluding filename and
113 : * is_program */
114 : CopyFromState cstate; /* COPY execution state */
115 : } FileFdwExecutionState;
116 :
117 : /*
118 : * SQL functions
119 : */
120 4 : PG_FUNCTION_INFO_V1(file_fdw_handler);
121 4 : PG_FUNCTION_INFO_V1(file_fdw_validator);
122 :
123 : /*
124 : * FDW callback routines
125 : */
126 : static void fileGetForeignRelSize(PlannerInfo *root,
127 : RelOptInfo *baserel,
128 : Oid foreigntableid);
129 : static void fileGetForeignPaths(PlannerInfo *root,
130 : RelOptInfo *baserel,
131 : Oid foreigntableid);
132 : static ForeignScan *fileGetForeignPlan(PlannerInfo *root,
133 : RelOptInfo *baserel,
134 : Oid foreigntableid,
135 : ForeignPath *best_path,
136 : List *tlist,
137 : List *scan_clauses,
138 : Plan *outer_plan);
139 : static void fileExplainForeignScan(ForeignScanState *node, ExplainState *es);
140 : static void fileBeginForeignScan(ForeignScanState *node, int eflags);
141 : static TupleTableSlot *fileIterateForeignScan(ForeignScanState *node);
142 : static void fileReScanForeignScan(ForeignScanState *node);
143 : static void fileEndForeignScan(ForeignScanState *node);
144 : static bool fileAnalyzeForeignTable(Relation relation,
145 : AcquireSampleRowsFunc *func,
146 : BlockNumber *totalpages);
147 : static bool fileIsForeignScanParallelSafe(PlannerInfo *root, RelOptInfo *rel,
148 : RangeTblEntry *rte);
149 :
150 : /*
151 : * Helper functions
152 : */
153 : static bool is_valid_option(const char *option, Oid context);
154 : static void fileGetOptions(Oid foreigntableid,
155 : char **filename,
156 : bool *is_program,
157 : List **other_options);
158 : static List *get_file_fdw_attribute_options(Oid relid);
159 : static bool check_selective_binary_conversion(RelOptInfo *baserel,
160 : Oid foreigntableid,
161 : List **columns);
162 : static void estimate_size(PlannerInfo *root, RelOptInfo *baserel,
163 : FileFdwPlanState *fdw_private);
164 : static void estimate_costs(PlannerInfo *root, RelOptInfo *baserel,
165 : FileFdwPlanState *fdw_private,
166 : Cost *startup_cost, Cost *total_cost);
167 : static int file_acquire_sample_rows(Relation onerel, int elevel,
168 : HeapTuple *rows, int targrows,
169 : double *totalrows, double *totaldeadrows);
170 :
171 :
172 : /*
173 : * Foreign-data wrapper handler function: return a struct with pointers
174 : * to my callback routines.
175 : */
176 : Datum
177 38 : file_fdw_handler(PG_FUNCTION_ARGS)
178 : {
179 38 : FdwRoutine *fdwroutine = makeNode(FdwRoutine);
180 :
181 38 : fdwroutine->GetForeignRelSize = fileGetForeignRelSize;
182 38 : fdwroutine->GetForeignPaths = fileGetForeignPaths;
183 38 : fdwroutine->GetForeignPlan = fileGetForeignPlan;
184 38 : fdwroutine->ExplainForeignScan = fileExplainForeignScan;
185 38 : fdwroutine->BeginForeignScan = fileBeginForeignScan;
186 38 : fdwroutine->IterateForeignScan = fileIterateForeignScan;
187 38 : fdwroutine->ReScanForeignScan = fileReScanForeignScan;
188 38 : fdwroutine->EndForeignScan = fileEndForeignScan;
189 38 : fdwroutine->AnalyzeForeignTable = fileAnalyzeForeignTable;
190 38 : fdwroutine->IsForeignScanParallelSafe = fileIsForeignScanParallelSafe;
191 :
192 38 : PG_RETURN_POINTER(fdwroutine);
193 : }
194 :
195 : /*
196 : * Validate the generic options given to a FOREIGN DATA WRAPPER, SERVER,
197 : * USER MAPPING or FOREIGN TABLE that uses file_fdw.
198 : *
199 : * Raise an ERROR if the option or its value is considered invalid.
200 : */
201 : Datum
202 114 : file_fdw_validator(PG_FUNCTION_ARGS)
203 : {
204 114 : List *options_list = untransformRelOptions(PG_GETARG_DATUM(0));
205 114 : Oid catalog = PG_GETARG_OID(1);
206 114 : char *filename = NULL;
207 114 : DefElem *force_not_null = NULL;
208 114 : DefElem *force_null = NULL;
209 114 : List *other_options = NIL;
210 : ListCell *cell;
211 :
212 : /*
213 : * Check that only options supported by file_fdw, and allowed for the
214 : * current object type, are given.
215 : */
216 382 : foreach(cell, options_list)
217 : {
218 286 : DefElem *def = (DefElem *) lfirst(cell);
219 :
220 286 : if (!is_valid_option(def->defname, catalog))
221 : {
222 : const struct FileFdwOption *opt;
223 : const char *closest_match;
224 : ClosestMatchState match_state;
225 16 : bool has_valid_options = false;
226 :
227 : /*
228 : * Unknown option specified, complain about it. Provide a hint
229 : * with a valid option that looks similar, if there is one.
230 : */
231 16 : initClosestMatch(&match_state, def->defname, 4);
232 256 : for (opt = valid_options; opt->optname; opt++)
233 : {
234 240 : if (catalog == opt->optcontext)
235 : {
236 52 : has_valid_options = true;
237 52 : updateClosestMatch(&match_state, opt->optname);
238 : }
239 : }
240 :
241 16 : closest_match = getClosestMatch(&match_state);
242 16 : ereport(ERROR,
243 : (errcode(ERRCODE_FDW_INVALID_OPTION_NAME),
244 : errmsg("invalid option \"%s\"", def->defname),
245 : has_valid_options ? closest_match ?
246 : errhint("Perhaps you meant the option \"%s\".",
247 : closest_match) : 0 :
248 : errhint("There are no valid options in this context.")));
249 : }
250 :
251 : /*
252 : * Separate out filename, program, and column-specific options, since
253 : * ProcessCopyOptions won't accept them.
254 : */
255 270 : if (strcmp(def->defname, "filename") == 0 ||
256 238 : strcmp(def->defname, "program") == 0)
257 : {
258 32 : if (filename)
259 0 : ereport(ERROR,
260 : (errcode(ERRCODE_SYNTAX_ERROR),
261 : errmsg("conflicting or redundant options")));
262 :
263 : /*
264 : * Check permissions for changing which file or program is used by
265 : * the file_fdw.
266 : *
267 : * Only members of the role 'pg_read_server_files' are allowed to
268 : * set the 'filename' option of a file_fdw foreign table, while
269 : * only members of the role 'pg_execute_server_program' are
270 : * allowed to set the 'program' option. This is because we don't
271 : * want regular users to be able to control which file gets read
272 : * or which program gets executed.
273 : *
274 : * Putting this sort of permissions check in a validator is a bit
275 : * of a crock, but there doesn't seem to be any other place that
276 : * can enforce the check more cleanly.
277 : *
278 : * Note that the valid_options[] array disallows setting filename
279 : * and program at any options level other than foreign table ---
280 : * otherwise there'd still be a security hole.
281 : */
282 32 : if (strcmp(def->defname, "filename") == 0 &&
283 32 : !has_privs_of_role(GetUserId(), ROLE_PG_READ_SERVER_FILES))
284 2 : ereport(ERROR,
285 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
286 : errmsg("permission denied to set the \"%s\" option of a file_fdw foreign table",
287 : "filename"),
288 : errdetail("Only roles with privileges of the \"%s\" role may set this option.",
289 : "pg_read_server_files")));
290 :
291 30 : if (strcmp(def->defname, "program") == 0 &&
292 0 : !has_privs_of_role(GetUserId(), ROLE_PG_EXECUTE_SERVER_PROGRAM))
293 0 : ereport(ERROR,
294 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
295 : errmsg("permission denied to set the \"%s\" option of a file_fdw foreign table",
296 : "program"),
297 : errdetail("Only roles with privileges of the \"%s\" role may set this option.",
298 : "pg_execute_server_program")));
299 :
300 30 : filename = defGetString(def);
301 : }
302 :
303 : /*
304 : * force_not_null is a boolean option; after validation we can discard
305 : * it - it will be retrieved later in get_file_fdw_attribute_options()
306 : */
307 238 : else if (strcmp(def->defname, "force_not_null") == 0)
308 : {
309 8 : if (force_not_null)
310 0 : ereport(ERROR,
311 : (errcode(ERRCODE_SYNTAX_ERROR),
312 : errmsg("conflicting or redundant options"),
313 : errhint("Option \"force_not_null\" supplied more than once for a column.")));
314 8 : force_not_null = def;
315 : /* Don't care what the value is, as long as it's a legal boolean */
316 8 : (void) defGetBoolean(def);
317 : }
318 : /* See comments for force_not_null above */
319 230 : else if (strcmp(def->defname, "force_null") == 0)
320 : {
321 8 : if (force_null)
322 0 : ereport(ERROR,
323 : (errcode(ERRCODE_SYNTAX_ERROR),
324 : errmsg("conflicting or redundant options"),
325 : errhint("Option \"force_null\" supplied more than once for a column.")));
326 8 : force_null = def;
327 8 : (void) defGetBoolean(def);
328 : }
329 : else
330 222 : other_options = lappend(other_options, def);
331 : }
332 :
333 : /*
334 : * Now apply the core COPY code's validation logic for more checks.
335 : */
336 96 : ProcessCopyOptions(NULL, NULL, true, other_options);
337 :
338 : /*
339 : * Either filename or program option is required for file_fdw foreign
340 : * tables.
341 : */
342 54 : if (catalog == ForeignTableRelationId && filename == NULL)
343 2 : ereport(ERROR,
344 : (errcode(ERRCODE_FDW_DYNAMIC_PARAMETER_VALUE_NEEDED),
345 : errmsg("either filename or program is required for file_fdw foreign tables")));
346 :
347 52 : PG_RETURN_VOID();
348 : }
349 :
350 : /*
351 : * Check if the provided option is one of the valid options.
352 : * context is the Oid of the catalog holding the object the option is for.
353 : */
354 : static bool
355 286 : is_valid_option(const char *option, Oid context)
356 : {
357 : const struct FileFdwOption *opt;
358 :
359 1754 : for (opt = valid_options; opt->optname; opt++)
360 : {
361 1738 : if (context == opt->optcontext && strcmp(opt->optname, option) == 0)
362 270 : return true;
363 : }
364 16 : return false;
365 : }
366 :
367 : /*
368 : * Fetch the options for a file_fdw foreign table.
369 : *
370 : * We have to separate out filename/program from the other options because
371 : * those must not appear in the options list passed to the core COPY code.
372 : */
373 : static void
374 154 : fileGetOptions(Oid foreigntableid,
375 : char **filename, bool *is_program, List **other_options)
376 : {
377 : ForeignTable *table;
378 : ForeignServer *server;
379 : ForeignDataWrapper *wrapper;
380 : List *options;
381 : ListCell *lc;
382 :
383 : /*
384 : * Extract options from FDW objects. We ignore user mappings because
385 : * file_fdw doesn't have any options that can be specified there.
386 : *
387 : * (XXX Actually, given the current contents of valid_options[], there's
388 : * no point in examining anything except the foreign table's own options.
389 : * Simplify?)
390 : */
391 154 : table = GetForeignTable(foreigntableid);
392 154 : server = GetForeignServer(table->serverid);
393 154 : wrapper = GetForeignDataWrapper(server->fdwid);
394 :
395 154 : options = NIL;
396 154 : options = list_concat(options, wrapper->options);
397 154 : options = list_concat(options, server->options);
398 154 : options = list_concat(options, table->options);
399 154 : options = list_concat(options, get_file_fdw_attribute_options(foreigntableid));
400 :
401 : /*
402 : * Separate out the filename or program option (we assume there is only
403 : * one).
404 : */
405 154 : *filename = NULL;
406 154 : *is_program = false;
407 308 : foreach(lc, options)
408 : {
409 308 : DefElem *def = (DefElem *) lfirst(lc);
410 :
411 308 : if (strcmp(def->defname, "filename") == 0)
412 : {
413 154 : *filename = defGetString(def);
414 154 : options = foreach_delete_current(options, lc);
415 154 : break;
416 : }
417 154 : else if (strcmp(def->defname, "program") == 0)
418 : {
419 0 : *filename = defGetString(def);
420 0 : *is_program = true;
421 0 : options = foreach_delete_current(options, lc);
422 0 : break;
423 : }
424 : }
425 :
426 : /*
427 : * The validator should have checked that filename or program was included
428 : * in the options, but check again, just in case.
429 : */
430 154 : if (*filename == NULL)
431 0 : elog(ERROR, "either filename or program is required for file_fdw foreign tables");
432 :
433 154 : *other_options = options;
434 154 : }
435 :
436 : /*
437 : * Retrieve per-column generic options from pg_attribute and construct a list
438 : * of DefElems representing them.
439 : *
440 : * At the moment we only have "force_not_null", and "force_null",
441 : * which should each be combined into a single DefElem listing all such
442 : * columns, since that's what COPY expects.
443 : */
444 : static List *
445 154 : get_file_fdw_attribute_options(Oid relid)
446 : {
447 : Relation rel;
448 : TupleDesc tupleDesc;
449 : AttrNumber natts;
450 : AttrNumber attnum;
451 154 : List *fnncolumns = NIL;
452 154 : List *fncolumns = NIL;
453 :
454 154 : List *options = NIL;
455 :
456 154 : rel = table_open(relid, AccessShareLock);
457 154 : tupleDesc = RelationGetDescr(rel);
458 154 : natts = tupleDesc->natts;
459 :
460 : /* Retrieve FDW options for all user-defined attributes. */
461 486 : for (attnum = 1; attnum <= natts; attnum++)
462 : {
463 332 : Form_pg_attribute attr = TupleDescAttr(tupleDesc, attnum - 1);
464 : List *column_options;
465 : ListCell *lc;
466 :
467 : /* Skip dropped attributes. */
468 332 : if (attr->attisdropped)
469 0 : continue;
470 :
471 332 : column_options = GetForeignColumnOptions(relid, attnum);
472 364 : foreach(lc, column_options)
473 : {
474 32 : DefElem *def = (DefElem *) lfirst(lc);
475 :
476 32 : if (strcmp(def->defname, "force_not_null") == 0)
477 : {
478 16 : if (defGetBoolean(def))
479 : {
480 8 : char *attname = pstrdup(NameStr(attr->attname));
481 :
482 8 : fnncolumns = lappend(fnncolumns, makeString(attname));
483 : }
484 : }
485 16 : else if (strcmp(def->defname, "force_null") == 0)
486 : {
487 16 : if (defGetBoolean(def))
488 : {
489 8 : char *attname = pstrdup(NameStr(attr->attname));
490 :
491 8 : fncolumns = lappend(fncolumns, makeString(attname));
492 : }
493 : }
494 : /* maybe in future handle other column options here */
495 : }
496 : }
497 :
498 154 : table_close(rel, AccessShareLock);
499 :
500 : /*
501 : * Return DefElem only when some column(s) have force_not_null /
502 : * force_null options set
503 : */
504 154 : if (fnncolumns != NIL)
505 8 : options = lappend(options, makeDefElem("force_not_null", (Node *) fnncolumns, -1));
506 :
507 154 : if (fncolumns != NIL)
508 8 : options = lappend(options, makeDefElem("force_null", (Node *) fncolumns, -1));
509 :
510 154 : return options;
511 : }
512 :
513 : /*
514 : * fileGetForeignRelSize
515 : * Obtain relation size estimates for a foreign table
516 : */
517 : static void
518 80 : fileGetForeignRelSize(PlannerInfo *root,
519 : RelOptInfo *baserel,
520 : Oid foreigntableid)
521 : {
522 : FileFdwPlanState *fdw_private;
523 :
524 : /*
525 : * Fetch options. We only need filename (or program) at this point, but
526 : * we might as well get everything and not need to re-fetch it later in
527 : * planning.
528 : */
529 80 : fdw_private = (FileFdwPlanState *) palloc(sizeof(FileFdwPlanState));
530 80 : fileGetOptions(foreigntableid,
531 : &fdw_private->filename,
532 : &fdw_private->is_program,
533 : &fdw_private->options);
534 80 : baserel->fdw_private = (void *) fdw_private;
535 :
536 : /* Estimate relation size */
537 80 : estimate_size(root, baserel, fdw_private);
538 80 : }
539 :
540 : /*
541 : * fileGetForeignPaths
542 : * Create possible access paths for a scan on the foreign table
543 : *
544 : * Currently we don't support any push-down feature, so there is only one
545 : * possible access path, which simply returns all records in the order in
546 : * the data file.
547 : */
548 : static void
549 80 : fileGetForeignPaths(PlannerInfo *root,
550 : RelOptInfo *baserel,
551 : Oid foreigntableid)
552 : {
553 80 : FileFdwPlanState *fdw_private = (FileFdwPlanState *) baserel->fdw_private;
554 : Cost startup_cost;
555 : Cost total_cost;
556 : List *columns;
557 80 : List *coptions = NIL;
558 :
559 : /* Decide whether to selectively perform binary conversion */
560 80 : if (check_selective_binary_conversion(baserel,
561 : foreigntableid,
562 : &columns))
563 8 : coptions = list_make1(makeDefElem("convert_selectively",
564 : (Node *) columns, -1));
565 :
566 : /* Estimate costs */
567 80 : estimate_costs(root, baserel, fdw_private,
568 : &startup_cost, &total_cost);
569 :
570 : /*
571 : * Create a ForeignPath node and add it as only possible path. We use the
572 : * fdw_private list of the path to carry the convert_selectively option;
573 : * it will be propagated into the fdw_private list of the Plan node.
574 : *
575 : * We don't support pushing join clauses into the quals of this path, but
576 : * it could still have required parameterization due to LATERAL refs in
577 : * its tlist.
578 : */
579 80 : add_path(baserel, (Path *)
580 80 : create_foreignscan_path(root, baserel,
581 : NULL, /* default pathtarget */
582 : baserel->rows,
583 : 0,
584 : startup_cost,
585 : total_cost,
586 : NIL, /* no pathkeys */
587 : baserel->lateral_relids,
588 : NULL, /* no extra plan */
589 : NIL, /* no fdw_restrictinfo list */
590 : coptions));
591 :
592 : /*
593 : * If data file was sorted, and we knew it somehow, we could insert
594 : * appropriate pathkeys into the ForeignPath node to tell the planner
595 : * that.
596 : */
597 80 : }
598 :
599 : /*
600 : * fileGetForeignPlan
601 : * Create a ForeignScan plan node for scanning the foreign table
602 : */
603 : static ForeignScan *
604 80 : fileGetForeignPlan(PlannerInfo *root,
605 : RelOptInfo *baserel,
606 : Oid foreigntableid,
607 : ForeignPath *best_path,
608 : List *tlist,
609 : List *scan_clauses,
610 : Plan *outer_plan)
611 : {
612 80 : Index scan_relid = baserel->relid;
613 :
614 : /*
615 : * We have no native ability to evaluate restriction clauses, so we just
616 : * put all the scan_clauses into the plan node's qual list for the
617 : * executor to check. So all we have to do here is strip RestrictInfo
618 : * nodes from the clauses and ignore pseudoconstants (which will be
619 : * handled elsewhere).
620 : */
621 80 : scan_clauses = extract_actual_clauses(scan_clauses, false);
622 :
623 : /* Create the ForeignScan node */
624 80 : return make_foreignscan(tlist,
625 : scan_clauses,
626 : scan_relid,
627 : NIL, /* no expressions to evaluate */
628 : best_path->fdw_private,
629 : NIL, /* no custom tlist */
630 : NIL, /* no remote quals */
631 : outer_plan);
632 : }
633 :
634 : /*
635 : * fileExplainForeignScan
636 : * Produce extra output for EXPLAIN
637 : */
638 : static void
639 6 : fileExplainForeignScan(ForeignScanState *node, ExplainState *es)
640 : {
641 : char *filename;
642 : bool is_program;
643 : List *options;
644 :
645 : /* Fetch options --- we only need filename and is_program at this point */
646 6 : fileGetOptions(RelationGetRelid(node->ss.ss_currentRelation),
647 : &filename, &is_program, &options);
648 :
649 6 : if (is_program)
650 0 : ExplainPropertyText("Foreign Program", filename, es);
651 : else
652 6 : ExplainPropertyText("Foreign File", filename, es);
653 :
654 : /* Suppress file size if we're not showing cost details */
655 6 : if (es->costs)
656 : {
657 : struct stat stat_buf;
658 :
659 0 : if (!is_program &&
660 0 : stat(filename, &stat_buf) == 0)
661 0 : ExplainPropertyInteger("Foreign File Size", "b",
662 0 : (int64) stat_buf.st_size, es);
663 : }
664 6 : }
665 :
666 : /*
667 : * fileBeginForeignScan
668 : * Initiate access to the file by creating CopyState
669 : */
670 : static void
671 70 : fileBeginForeignScan(ForeignScanState *node, int eflags)
672 : {
673 70 : ForeignScan *plan = (ForeignScan *) node->ss.ps.plan;
674 : char *filename;
675 : bool is_program;
676 : List *options;
677 : CopyFromState cstate;
678 : FileFdwExecutionState *festate;
679 :
680 : /*
681 : * Do nothing in EXPLAIN (no ANALYZE) case. node->fdw_state stays NULL.
682 : */
683 70 : if (eflags & EXEC_FLAG_EXPLAIN_ONLY)
684 6 : return;
685 :
686 : /* Fetch options of foreign table */
687 64 : fileGetOptions(RelationGetRelid(node->ss.ss_currentRelation),
688 : &filename, &is_program, &options);
689 :
690 : /* Add any options from the plan (currently only convert_selectively) */
691 64 : options = list_concat(options, plan->fdw_private);
692 :
693 : /*
694 : * Create CopyState from FDW options. We always acquire all columns, so
695 : * as to match the expected ScanTupleSlot signature.
696 : */
697 64 : cstate = BeginCopyFrom(NULL,
698 : node->ss.ss_currentRelation,
699 : NULL,
700 : filename,
701 : is_program,
702 : NULL,
703 : NIL,
704 : options);
705 :
706 : /*
707 : * Save state in node->fdw_state. We must save enough information to call
708 : * BeginCopyFrom() again.
709 : */
710 62 : festate = (FileFdwExecutionState *) palloc(sizeof(FileFdwExecutionState));
711 62 : festate->filename = filename;
712 62 : festate->is_program = is_program;
713 62 : festate->options = options;
714 62 : festate->cstate = cstate;
715 :
716 62 : node->fdw_state = (void *) festate;
717 : }
718 :
719 : /*
720 : * fileIterateForeignScan
721 : * Read next record from the data file and store it into the
722 : * ScanTupleSlot as a virtual tuple
723 : */
724 : static TupleTableSlot *
725 246 : fileIterateForeignScan(ForeignScanState *node)
726 : {
727 246 : FileFdwExecutionState *festate = (FileFdwExecutionState *) node->fdw_state;
728 246 : EState *estate = CreateExecutorState();
729 : ExprContext *econtext;
730 246 : MemoryContext oldcontext = CurrentMemoryContext;
731 246 : TupleTableSlot *slot = node->ss.ss_ScanTupleSlot;
732 246 : CopyFromState cstate = festate->cstate;
733 : ErrorContextCallback errcallback;
734 :
735 : /* Set up callback to identify error line number. */
736 246 : errcallback.callback = CopyFromErrorCallback;
737 246 : errcallback.arg = (void *) cstate;
738 246 : errcallback.previous = error_context_stack;
739 246 : error_context_stack = &errcallback;
740 :
741 : /*
742 : * We pass ExprContext because there might be a use of the DEFAULT option
743 : * in COPY FROM, so we may need to evaluate default expressions.
744 : */
745 246 : econtext = GetPerTupleExprContext(estate);
746 :
747 260 : retry:
748 :
749 : /*
750 : * DEFAULT expressions need to be evaluated in a per-tuple context, so
751 : * switch in case we are doing that.
752 : */
753 260 : MemoryContextSwitchTo(GetPerTupleMemoryContext(estate));
754 :
755 : /*
756 : * The protocol for loading a virtual tuple into a slot is first
757 : * ExecClearTuple, then fill the values/isnull arrays, then
758 : * ExecStoreVirtualTuple. If we don't find another row in the file, we
759 : * just skip the last step, leaving the slot empty as required.
760 : *
761 : */
762 260 : ExecClearTuple(slot);
763 :
764 260 : if (NextCopyFrom(cstate, econtext, slot->tts_values, slot->tts_isnull))
765 : {
766 196 : if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
767 32 : cstate->escontext->error_occurred)
768 : {
769 : /*
770 : * Soft error occurred, skip this tuple and just make
771 : * ErrorSaveContext ready for the next NextCopyFrom. Since we
772 : * don't set details_wanted and error_data is not to be filled,
773 : * just resetting error_occurred is enough.
774 : */
775 16 : cstate->escontext->error_occurred = false;
776 :
777 : /* Switch back to original memory context */
778 16 : MemoryContextSwitchTo(oldcontext);
779 :
780 : /*
781 : * Make sure we are interruptible while repeatedly calling
782 : * NextCopyFrom() until no soft error occurs.
783 : */
784 16 : CHECK_FOR_INTERRUPTS();
785 :
786 : /*
787 : * Reset the per-tuple exprcontext, to clean-up after expression
788 : * evaluations etc.
789 : */
790 16 : ResetPerTupleExprContext(estate);
791 :
792 16 : if (cstate->opts.reject_limit > 0 &&
793 8 : cstate->num_errors > cstate->opts.reject_limit)
794 2 : ereport(ERROR,
795 : (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
796 : errmsg("skipped more than REJECT_LIMIT (%lld) rows due to data type incompatibility",
797 : (long long) cstate->opts.reject_limit)));
798 :
799 : /* Repeat NextCopyFrom() until no soft error occurs */
800 14 : goto retry;
801 : }
802 :
803 180 : ExecStoreVirtualTuple(slot);
804 : }
805 :
806 : /* Switch back to original memory context */
807 240 : MemoryContextSwitchTo(oldcontext);
808 :
809 : /* Remove error callback. */
810 240 : error_context_stack = errcallback.previous;
811 :
812 240 : return slot;
813 : }
814 :
815 : /*
816 : * fileReScanForeignScan
817 : * Rescan table, possibly with new parameters
818 : */
819 : static void
820 6 : fileReScanForeignScan(ForeignScanState *node)
821 : {
822 6 : FileFdwExecutionState *festate = (FileFdwExecutionState *) node->fdw_state;
823 :
824 6 : EndCopyFrom(festate->cstate);
825 :
826 12 : festate->cstate = BeginCopyFrom(NULL,
827 : node->ss.ss_currentRelation,
828 : NULL,
829 6 : festate->filename,
830 6 : festate->is_program,
831 : NULL,
832 : NIL,
833 : festate->options);
834 6 : }
835 :
836 : /*
837 : * fileEndForeignScan
838 : * Finish scanning foreign table and dispose objects used for this scan
839 : */
840 : static void
841 62 : fileEndForeignScan(ForeignScanState *node)
842 : {
843 62 : FileFdwExecutionState *festate = (FileFdwExecutionState *) node->fdw_state;
844 :
845 : /* if festate is NULL, we are in EXPLAIN; nothing to do */
846 62 : if (!festate)
847 6 : return;
848 :
849 56 : if (festate->cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
850 6 : festate->cstate->num_errors > 0 &&
851 6 : festate->cstate->opts.log_verbosity >= COPY_LOG_VERBOSITY_DEFAULT)
852 2 : ereport(NOTICE,
853 : errmsg_plural("%llu row was skipped due to data type incompatibility",
854 : "%llu rows were skipped due to data type incompatibility",
855 : (unsigned long long) festate->cstate->num_errors,
856 : (unsigned long long) festate->cstate->num_errors));
857 :
858 56 : EndCopyFrom(festate->cstate);
859 : }
860 :
861 : /*
862 : * fileAnalyzeForeignTable
863 : * Test whether analyzing this foreign table is supported
864 : */
865 : static bool
866 2 : fileAnalyzeForeignTable(Relation relation,
867 : AcquireSampleRowsFunc *func,
868 : BlockNumber *totalpages)
869 : {
870 : char *filename;
871 : bool is_program;
872 : List *options;
873 : struct stat stat_buf;
874 :
875 : /* Fetch options of foreign table */
876 2 : fileGetOptions(RelationGetRelid(relation), &filename, &is_program, &options);
877 :
878 : /*
879 : * If this is a program instead of a file, just return false to skip
880 : * analyzing the table. We could run the program and collect stats on
881 : * whatever it currently returns, but it seems likely that in such cases
882 : * the output would be too volatile for the stats to be useful. Maybe
883 : * there should be an option to enable doing this?
884 : */
885 2 : if (is_program)
886 0 : return false;
887 :
888 : /*
889 : * Get size of the file. (XXX if we fail here, would it be better to just
890 : * return false to skip analyzing the table?)
891 : */
892 2 : if (stat(filename, &stat_buf) < 0)
893 0 : ereport(ERROR,
894 : (errcode_for_file_access(),
895 : errmsg("could not stat file \"%s\": %m",
896 : filename)));
897 :
898 : /*
899 : * Convert size to pages. Must return at least 1 so that we can tell
900 : * later on that pg_class.relpages is not default.
901 : */
902 2 : *totalpages = (stat_buf.st_size + (BLCKSZ - 1)) / BLCKSZ;
903 2 : if (*totalpages < 1)
904 0 : *totalpages = 1;
905 :
906 2 : *func = file_acquire_sample_rows;
907 :
908 2 : return true;
909 : }
910 :
911 : /*
912 : * fileIsForeignScanParallelSafe
913 : * Reading a file, or external program, in a parallel worker should work
914 : * just the same as reading it in the leader, so mark scans safe.
915 : */
916 : static bool
917 72 : fileIsForeignScanParallelSafe(PlannerInfo *root, RelOptInfo *rel,
918 : RangeTblEntry *rte)
919 : {
920 72 : return true;
921 : }
922 :
923 : /*
924 : * check_selective_binary_conversion
925 : *
926 : * Check to see if it's useful to convert only a subset of the file's columns
927 : * to binary. If so, construct a list of the column names to be converted,
928 : * return that at *columns, and return true. (Note that it's possible to
929 : * determine that no columns need be converted, for instance with a COUNT(*)
930 : * query. So we can't use returning a NIL list to indicate failure.)
931 : */
932 : static bool
933 80 : check_selective_binary_conversion(RelOptInfo *baserel,
934 : Oid foreigntableid,
935 : List **columns)
936 : {
937 : ForeignTable *table;
938 : ListCell *lc;
939 : Relation rel;
940 : TupleDesc tupleDesc;
941 : int attidx;
942 80 : Bitmapset *attrs_used = NULL;
943 80 : bool has_wholerow = false;
944 : int numattrs;
945 : int i;
946 :
947 80 : *columns = NIL; /* default result */
948 :
949 : /*
950 : * Check format of the file. If binary format, this is irrelevant.
951 : */
952 80 : table = GetForeignTable(foreigntableid);
953 80 : foreach(lc, table->options)
954 : {
955 80 : DefElem *def = (DefElem *) lfirst(lc);
956 :
957 80 : if (strcmp(def->defname, "format") == 0)
958 : {
959 80 : char *format = defGetString(def);
960 :
961 80 : if (strcmp(format, "binary") == 0)
962 0 : return false;
963 80 : break;
964 : }
965 : }
966 :
967 : /* Collect all the attributes needed for joins or final output. */
968 80 : pull_varattnos((Node *) baserel->reltarget->exprs, baserel->relid,
969 : &attrs_used);
970 :
971 : /* Add all the attributes used by restriction clauses. */
972 96 : foreach(lc, baserel->baserestrictinfo)
973 : {
974 16 : RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
975 :
976 16 : pull_varattnos((Node *) rinfo->clause, baserel->relid,
977 : &attrs_used);
978 : }
979 :
980 : /* Convert attribute numbers to column names. */
981 80 : rel = table_open(foreigntableid, AccessShareLock);
982 80 : tupleDesc = RelationGetDescr(rel);
983 :
984 80 : attidx = -1;
985 254 : while ((attidx = bms_next_member(attrs_used, attidx)) >= 0)
986 : {
987 : /* attidx is zero-based, attnum is the normal attribute number */
988 182 : AttrNumber attnum = attidx + FirstLowInvalidHeapAttributeNumber;
989 :
990 182 : if (attnum == 0)
991 : {
992 8 : has_wholerow = true;
993 8 : break;
994 : }
995 :
996 : /* Ignore system attributes. */
997 174 : if (attnum < 0)
998 26 : continue;
999 :
1000 : /* Get user attributes. */
1001 148 : if (attnum > 0)
1002 : {
1003 148 : Form_pg_attribute attr = TupleDescAttr(tupleDesc, attnum - 1);
1004 148 : char *attname = NameStr(attr->attname);
1005 :
1006 : /* Skip dropped attributes (probably shouldn't see any here). */
1007 148 : if (attr->attisdropped)
1008 0 : continue;
1009 :
1010 : /*
1011 : * Skip generated columns (COPY won't accept them in the column
1012 : * list)
1013 : */
1014 148 : if (attr->attgenerated)
1015 2 : continue;
1016 146 : *columns = lappend(*columns, makeString(pstrdup(attname)));
1017 : }
1018 : }
1019 :
1020 : /* Count non-dropped user attributes while we have the tupdesc. */
1021 80 : numattrs = 0;
1022 252 : for (i = 0; i < tupleDesc->natts; i++)
1023 : {
1024 172 : Form_pg_attribute attr = TupleDescAttr(tupleDesc, i);
1025 :
1026 172 : if (attr->attisdropped)
1027 0 : continue;
1028 172 : numattrs++;
1029 : }
1030 :
1031 80 : table_close(rel, AccessShareLock);
1032 :
1033 : /* If there's a whole-row reference, fail: we need all the columns. */
1034 80 : if (has_wholerow)
1035 : {
1036 8 : *columns = NIL;
1037 8 : return false;
1038 : }
1039 :
1040 : /* If all the user attributes are needed, fail. */
1041 72 : if (numattrs == list_length(*columns))
1042 : {
1043 64 : *columns = NIL;
1044 64 : return false;
1045 : }
1046 :
1047 8 : return true;
1048 : }
1049 :
1050 : /*
1051 : * Estimate size of a foreign table.
1052 : *
1053 : * The main result is returned in baserel->rows. We also set
1054 : * fdw_private->pages and fdw_private->ntuples for later use in the cost
1055 : * calculation.
1056 : */
1057 : static void
1058 80 : estimate_size(PlannerInfo *root, RelOptInfo *baserel,
1059 : FileFdwPlanState *fdw_private)
1060 : {
1061 : struct stat stat_buf;
1062 : BlockNumber pages;
1063 : double ntuples;
1064 : double nrows;
1065 :
1066 : /*
1067 : * Get size of the file. It might not be there at plan time, though, in
1068 : * which case we have to use a default estimate. We also have to fall
1069 : * back to the default if using a program as the input.
1070 : */
1071 80 : if (fdw_private->is_program || stat(fdw_private->filename, &stat_buf) < 0)
1072 0 : stat_buf.st_size = 10 * BLCKSZ;
1073 :
1074 : /*
1075 : * Convert size to pages for use in I/O cost estimate later.
1076 : */
1077 80 : pages = (stat_buf.st_size + (BLCKSZ - 1)) / BLCKSZ;
1078 80 : if (pages < 1)
1079 0 : pages = 1;
1080 80 : fdw_private->pages = pages;
1081 :
1082 : /*
1083 : * Estimate the number of tuples in the file.
1084 : */
1085 80 : if (baserel->tuples >= 0 && baserel->pages > 0)
1086 0 : {
1087 : /*
1088 : * We have # of pages and # of tuples from pg_class (that is, from a
1089 : * previous ANALYZE), so compute a tuples-per-page estimate and scale
1090 : * that by the current file size.
1091 : */
1092 : double density;
1093 :
1094 0 : density = baserel->tuples / (double) baserel->pages;
1095 0 : ntuples = clamp_row_est(density * (double) pages);
1096 : }
1097 : else
1098 : {
1099 : /*
1100 : * Otherwise we have to fake it. We back into this estimate using the
1101 : * planner's idea of the relation width; which is bogus if not all
1102 : * columns are being read, not to mention that the text representation
1103 : * of a row probably isn't the same size as its internal
1104 : * representation. Possibly we could do something better, but the
1105 : * real answer to anyone who complains is "ANALYZE" ...
1106 : */
1107 : int tuple_width;
1108 :
1109 80 : tuple_width = MAXALIGN(baserel->reltarget->width) +
1110 : MAXALIGN(SizeofHeapTupleHeader);
1111 80 : ntuples = clamp_row_est((double) stat_buf.st_size /
1112 80 : (double) tuple_width);
1113 : }
1114 80 : fdw_private->ntuples = ntuples;
1115 :
1116 : /*
1117 : * Now estimate the number of rows returned by the scan after applying the
1118 : * baserestrictinfo quals.
1119 : */
1120 80 : nrows = ntuples *
1121 80 : clauselist_selectivity(root,
1122 : baserel->baserestrictinfo,
1123 : 0,
1124 : JOIN_INNER,
1125 : NULL);
1126 :
1127 80 : nrows = clamp_row_est(nrows);
1128 :
1129 : /* Save the output-rows estimate for the planner */
1130 80 : baserel->rows = nrows;
1131 80 : }
1132 :
1133 : /*
1134 : * Estimate costs of scanning a foreign table.
1135 : *
1136 : * Results are returned in *startup_cost and *total_cost.
1137 : */
1138 : static void
1139 80 : estimate_costs(PlannerInfo *root, RelOptInfo *baserel,
1140 : FileFdwPlanState *fdw_private,
1141 : Cost *startup_cost, Cost *total_cost)
1142 : {
1143 80 : BlockNumber pages = fdw_private->pages;
1144 80 : double ntuples = fdw_private->ntuples;
1145 80 : Cost run_cost = 0;
1146 : Cost cpu_per_tuple;
1147 :
1148 : /*
1149 : * We estimate costs almost the same way as cost_seqscan(), thus assuming
1150 : * that I/O costs are equivalent to a regular table file of the same size.
1151 : * However, we take per-tuple CPU costs as 10x of a seqscan, to account
1152 : * for the cost of parsing records.
1153 : *
1154 : * In the case of a program source, this calculation is even more divorced
1155 : * from reality, but we have no good alternative; and it's not clear that
1156 : * the numbers we produce here matter much anyway, since there's only one
1157 : * access path for the rel.
1158 : */
1159 80 : run_cost += seq_page_cost * pages;
1160 :
1161 80 : *startup_cost = baserel->baserestrictcost.startup;
1162 80 : cpu_per_tuple = cpu_tuple_cost * 10 + baserel->baserestrictcost.per_tuple;
1163 80 : run_cost += cpu_per_tuple * ntuples;
1164 80 : *total_cost = *startup_cost + run_cost;
1165 80 : }
1166 :
1167 : /*
1168 : * file_acquire_sample_rows -- acquire a random sample of rows from the table
1169 : *
1170 : * Selected rows are returned in the caller-allocated array rows[],
1171 : * which must have at least targrows entries.
1172 : * The actual number of rows selected is returned as the function result.
1173 : * We also count the total number of rows in the file and return it into
1174 : * *totalrows. Rows skipped due to on_error = 'ignore' are not included
1175 : * in this count. Note that *totaldeadrows is always set to 0.
1176 : *
1177 : * Note that the returned list of rows is not always in order by physical
1178 : * position in the file. Therefore, correlation estimates derived later
1179 : * may be meaningless, but it's OK because we don't use the estimates
1180 : * currently (the planner only pays attention to correlation for indexscans).
1181 : */
1182 : static int
1183 2 : file_acquire_sample_rows(Relation onerel, int elevel,
1184 : HeapTuple *rows, int targrows,
1185 : double *totalrows, double *totaldeadrows)
1186 : {
1187 2 : int numrows = 0;
1188 2 : double rowstoskip = -1; /* -1 means not set yet */
1189 : ReservoirStateData rstate;
1190 : TupleDesc tupDesc;
1191 : Datum *values;
1192 : bool *nulls;
1193 : bool found;
1194 : char *filename;
1195 : bool is_program;
1196 : List *options;
1197 : CopyFromState cstate;
1198 : ErrorContextCallback errcallback;
1199 2 : MemoryContext oldcontext = CurrentMemoryContext;
1200 : MemoryContext tupcontext;
1201 :
1202 : Assert(onerel);
1203 : Assert(targrows > 0);
1204 :
1205 2 : tupDesc = RelationGetDescr(onerel);
1206 2 : values = (Datum *) palloc(tupDesc->natts * sizeof(Datum));
1207 2 : nulls = (bool *) palloc(tupDesc->natts * sizeof(bool));
1208 :
1209 : /* Fetch options of foreign table */
1210 2 : fileGetOptions(RelationGetRelid(onerel), &filename, &is_program, &options);
1211 :
1212 : /*
1213 : * Create CopyState from FDW options.
1214 : */
1215 2 : cstate = BeginCopyFrom(NULL, onerel, NULL, filename, is_program, NULL, NIL,
1216 : options);
1217 :
1218 : /*
1219 : * Use per-tuple memory context to prevent leak of memory used to read
1220 : * rows from the file with Copy routines.
1221 : */
1222 2 : tupcontext = AllocSetContextCreate(CurrentMemoryContext,
1223 : "file_fdw temporary context",
1224 : ALLOCSET_DEFAULT_SIZES);
1225 :
1226 : /* Prepare for sampling rows */
1227 2 : reservoir_init_selection_state(&rstate, targrows);
1228 :
1229 : /* Set up callback to identify error line number. */
1230 2 : errcallback.callback = CopyFromErrorCallback;
1231 2 : errcallback.arg = (void *) cstate;
1232 2 : errcallback.previous = error_context_stack;
1233 2 : error_context_stack = &errcallback;
1234 :
1235 2 : *totalrows = 0;
1236 2 : *totaldeadrows = 0;
1237 : for (;;)
1238 : {
1239 : /* Check for user-requested abort or sleep */
1240 10 : vacuum_delay_point();
1241 :
1242 : /* Fetch next row */
1243 10 : MemoryContextReset(tupcontext);
1244 10 : MemoryContextSwitchTo(tupcontext);
1245 :
1246 10 : found = NextCopyFrom(cstate, NULL, values, nulls);
1247 :
1248 10 : MemoryContextSwitchTo(oldcontext);
1249 :
1250 10 : if (!found)
1251 2 : break;
1252 :
1253 8 : if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
1254 8 : cstate->escontext->error_occurred)
1255 : {
1256 : /*
1257 : * Soft error occurred, skip this tuple and just make
1258 : * ErrorSaveContext ready for the next NextCopyFrom. Since we
1259 : * don't set details_wanted and error_data is not to be filled,
1260 : * just resetting error_occurred is enough.
1261 : */
1262 4 : cstate->escontext->error_occurred = false;
1263 :
1264 : /* Repeat NextCopyFrom() until no soft error occurs */
1265 4 : continue;
1266 : }
1267 :
1268 : /*
1269 : * The first targrows sample rows are simply copied into the
1270 : * reservoir. Then we start replacing tuples in the sample until we
1271 : * reach the end of the relation. This algorithm is from Jeff Vitter's
1272 : * paper (see more info in commands/analyze.c).
1273 : */
1274 4 : if (numrows < targrows)
1275 : {
1276 4 : rows[numrows++] = heap_form_tuple(tupDesc, values, nulls);
1277 : }
1278 : else
1279 : {
1280 : /*
1281 : * t in Vitter's paper is the number of records already processed.
1282 : * If we need to compute a new S value, we must use the
1283 : * not-yet-incremented value of totalrows as t.
1284 : */
1285 0 : if (rowstoskip < 0)
1286 0 : rowstoskip = reservoir_get_next_S(&rstate, *totalrows, targrows);
1287 :
1288 0 : if (rowstoskip <= 0)
1289 : {
1290 : /*
1291 : * Found a suitable tuple, so save it, replacing one old tuple
1292 : * at random
1293 : */
1294 0 : int k = (int) (targrows * sampler_random_fract(&rstate.randstate));
1295 :
1296 : Assert(k >= 0 && k < targrows);
1297 0 : heap_freetuple(rows[k]);
1298 0 : rows[k] = heap_form_tuple(tupDesc, values, nulls);
1299 : }
1300 :
1301 0 : rowstoskip -= 1;
1302 : }
1303 :
1304 4 : *totalrows += 1;
1305 : }
1306 :
1307 : /* Remove error callback. */
1308 2 : error_context_stack = errcallback.previous;
1309 :
1310 : /* Clean up. */
1311 2 : MemoryContextDelete(tupcontext);
1312 :
1313 2 : if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
1314 2 : cstate->num_errors > 0 &&
1315 2 : cstate->opts.log_verbosity >= COPY_LOG_VERBOSITY_DEFAULT)
1316 0 : ereport(NOTICE,
1317 : errmsg_plural("%llu row was skipped due to data type incompatibility",
1318 : "%llu rows were skipped due to data type incompatibility",
1319 : (unsigned long long) cstate->num_errors,
1320 : (unsigned long long) cstate->num_errors));
1321 :
1322 2 : EndCopyFrom(cstate);
1323 :
1324 2 : pfree(values);
1325 2 : pfree(nulls);
1326 :
1327 : /*
1328 : * Emit some interesting relation info
1329 : */
1330 2 : ereport(elevel,
1331 : (errmsg("\"%s\": file contains %.0f rows; "
1332 : "%d rows in sample",
1333 : RelationGetRelationName(onerel),
1334 : *totalrows, numrows)));
1335 :
1336 2 : return numrows;
1337 : }
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