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) 2010-2025, 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_format.h"
28 : #include "commands/explain_state.h"
29 : #include "commands/vacuum.h"
30 : #include "executor/executor.h"
31 : #include "foreign/fdwapi.h"
32 : #include "foreign/foreign.h"
33 : #include "miscadmin.h"
34 : #include "nodes/makefuncs.h"
35 : #include "optimizer/optimizer.h"
36 : #include "optimizer/pathnode.h"
37 : #include "optimizer/planmain.h"
38 : #include "optimizer/restrictinfo.h"
39 : #include "utils/acl.h"
40 : #include "utils/memutils.h"
41 : #include "utils/rel.h"
42 : #include "utils/sampling.h"
43 : #include "utils/varlena.h"
44 :
45 2 : PG_MODULE_MAGIC_EXT(
46 : .name = "file_fdw",
47 : .version = PG_VERSION
48 : );
49 :
50 : /*
51 : * Describes the valid options for objects that use this wrapper.
52 : */
53 : struct FileFdwOption
54 : {
55 : const char *optname;
56 : Oid optcontext; /* Oid of catalog in which option may appear */
57 : };
58 :
59 : /*
60 : * Valid options for file_fdw.
61 : * These options are based on the options for the COPY FROM command.
62 : * But note that force_not_null and force_null are handled as boolean options
63 : * attached to a column, not as table options.
64 : *
65 : * Note: If you are adding new option for user mapping, you need to modify
66 : * fileGetOptions(), which currently doesn't bother to look at user mappings.
67 : */
68 : static const struct FileFdwOption valid_options[] = {
69 : /* Data source options */
70 : {"filename", ForeignTableRelationId},
71 : {"program", ForeignTableRelationId},
72 :
73 : /* Format options */
74 : /* oids option is not supported */
75 : {"format", ForeignTableRelationId},
76 : {"header", ForeignTableRelationId},
77 : {"delimiter", ForeignTableRelationId},
78 : {"quote", ForeignTableRelationId},
79 : {"escape", ForeignTableRelationId},
80 : {"null", ForeignTableRelationId},
81 : {"default", ForeignTableRelationId},
82 : {"encoding", ForeignTableRelationId},
83 : {"on_error", ForeignTableRelationId},
84 : {"log_verbosity", ForeignTableRelationId},
85 : {"reject_limit", ForeignTableRelationId},
86 : {"force_not_null", AttributeRelationId},
87 : {"force_null", AttributeRelationId},
88 :
89 : /*
90 : * force_quote is not supported by file_fdw because it's for COPY TO.
91 : */
92 :
93 : /* Sentinel */
94 : {NULL, InvalidOid}
95 : };
96 :
97 : /*
98 : * FDW-specific information for RelOptInfo.fdw_private.
99 : */
100 : typedef struct FileFdwPlanState
101 : {
102 : char *filename; /* file or program to read from */
103 : bool is_program; /* true if filename represents an OS command */
104 : List *options; /* merged COPY options, excluding filename and
105 : * is_program */
106 : BlockNumber pages; /* estimate of file's physical size */
107 : double ntuples; /* estimate of number of data rows */
108 : } FileFdwPlanState;
109 :
110 : /*
111 : * FDW-specific information for ForeignScanState.fdw_state.
112 : */
113 : typedef struct FileFdwExecutionState
114 : {
115 : char *filename; /* file or program to read from */
116 : bool is_program; /* true if filename represents an OS command */
117 : List *options; /* merged COPY options, excluding filename and
118 : * is_program */
119 : CopyFromState cstate; /* COPY execution state */
120 : } FileFdwExecutionState;
121 :
122 : /*
123 : * SQL functions
124 : */
125 4 : PG_FUNCTION_INFO_V1(file_fdw_handler);
126 4 : PG_FUNCTION_INFO_V1(file_fdw_validator);
127 :
128 : /*
129 : * FDW callback routines
130 : */
131 : static void fileGetForeignRelSize(PlannerInfo *root,
132 : RelOptInfo *baserel,
133 : Oid foreigntableid);
134 : static void fileGetForeignPaths(PlannerInfo *root,
135 : RelOptInfo *baserel,
136 : Oid foreigntableid);
137 : static ForeignScan *fileGetForeignPlan(PlannerInfo *root,
138 : RelOptInfo *baserel,
139 : Oid foreigntableid,
140 : ForeignPath *best_path,
141 : List *tlist,
142 : List *scan_clauses,
143 : Plan *outer_plan);
144 : static void fileExplainForeignScan(ForeignScanState *node, ExplainState *es);
145 : static void fileBeginForeignScan(ForeignScanState *node, int eflags);
146 : static TupleTableSlot *fileIterateForeignScan(ForeignScanState *node);
147 : static void fileReScanForeignScan(ForeignScanState *node);
148 : static void fileEndForeignScan(ForeignScanState *node);
149 : static bool fileAnalyzeForeignTable(Relation relation,
150 : AcquireSampleRowsFunc *func,
151 : BlockNumber *totalpages);
152 : static bool fileIsForeignScanParallelSafe(PlannerInfo *root, RelOptInfo *rel,
153 : RangeTblEntry *rte);
154 :
155 : /*
156 : * Helper functions
157 : */
158 : static bool is_valid_option(const char *option, Oid context);
159 : static void fileGetOptions(Oid foreigntableid,
160 : char **filename,
161 : bool *is_program,
162 : List **other_options);
163 : static List *get_file_fdw_attribute_options(Oid relid);
164 : static bool check_selective_binary_conversion(RelOptInfo *baserel,
165 : Oid foreigntableid,
166 : List **columns);
167 : static void estimate_size(PlannerInfo *root, RelOptInfo *baserel,
168 : FileFdwPlanState *fdw_private);
169 : static void estimate_costs(PlannerInfo *root, RelOptInfo *baserel,
170 : FileFdwPlanState *fdw_private,
171 : Cost *startup_cost, Cost *total_cost);
172 : static int file_acquire_sample_rows(Relation onerel, int elevel,
173 : HeapTuple *rows, int targrows,
174 : double *totalrows, double *totaldeadrows);
175 :
176 :
177 : /*
178 : * Foreign-data wrapper handler function: return a struct with pointers
179 : * to my callback routines.
180 : */
181 : Datum
182 38 : file_fdw_handler(PG_FUNCTION_ARGS)
183 : {
184 38 : FdwRoutine *fdwroutine = makeNode(FdwRoutine);
185 :
186 38 : fdwroutine->GetForeignRelSize = fileGetForeignRelSize;
187 38 : fdwroutine->GetForeignPaths = fileGetForeignPaths;
188 38 : fdwroutine->GetForeignPlan = fileGetForeignPlan;
189 38 : fdwroutine->ExplainForeignScan = fileExplainForeignScan;
190 38 : fdwroutine->BeginForeignScan = fileBeginForeignScan;
191 38 : fdwroutine->IterateForeignScan = fileIterateForeignScan;
192 38 : fdwroutine->ReScanForeignScan = fileReScanForeignScan;
193 38 : fdwroutine->EndForeignScan = fileEndForeignScan;
194 38 : fdwroutine->AnalyzeForeignTable = fileAnalyzeForeignTable;
195 38 : fdwroutine->IsForeignScanParallelSafe = fileIsForeignScanParallelSafe;
196 :
197 38 : PG_RETURN_POINTER(fdwroutine);
198 : }
199 :
200 : /*
201 : * Validate the generic options given to a FOREIGN DATA WRAPPER, SERVER,
202 : * USER MAPPING or FOREIGN TABLE that uses file_fdw.
203 : *
204 : * Raise an ERROR if the option or its value is considered invalid.
205 : */
206 : Datum
207 122 : file_fdw_validator(PG_FUNCTION_ARGS)
208 : {
209 122 : List *options_list = untransformRelOptions(PG_GETARG_DATUM(0));
210 122 : Oid catalog = PG_GETARG_OID(1);
211 122 : char *filename = NULL;
212 122 : DefElem *force_not_null = NULL;
213 122 : DefElem *force_null = NULL;
214 122 : List *other_options = NIL;
215 : ListCell *cell;
216 :
217 : /*
218 : * Check that only options supported by file_fdw, and allowed for the
219 : * current object type, are given.
220 : */
221 402 : foreach(cell, options_list)
222 : {
223 298 : DefElem *def = (DefElem *) lfirst(cell);
224 :
225 298 : if (!is_valid_option(def->defname, catalog))
226 : {
227 : const struct FileFdwOption *opt;
228 : const char *closest_match;
229 : ClosestMatchState match_state;
230 16 : bool has_valid_options = false;
231 :
232 : /*
233 : * Unknown option specified, complain about it. Provide a hint
234 : * with a valid option that looks similar, if there is one.
235 : */
236 16 : initClosestMatch(&match_state, def->defname, 4);
237 256 : for (opt = valid_options; opt->optname; opt++)
238 : {
239 240 : if (catalog == opt->optcontext)
240 : {
241 52 : has_valid_options = true;
242 52 : updateClosestMatch(&match_state, opt->optname);
243 : }
244 : }
245 :
246 16 : closest_match = getClosestMatch(&match_state);
247 16 : ereport(ERROR,
248 : (errcode(ERRCODE_FDW_INVALID_OPTION_NAME),
249 : errmsg("invalid option \"%s\"", def->defname),
250 : has_valid_options ? closest_match ?
251 : errhint("Perhaps you meant the option \"%s\".",
252 : closest_match) : 0 :
253 : errhint("There are no valid options in this context.")));
254 : }
255 :
256 : /*
257 : * Separate out filename, program, and column-specific options, since
258 : * ProcessCopyOptions won't accept them.
259 : */
260 282 : if (strcmp(def->defname, "filename") == 0 ||
261 250 : strcmp(def->defname, "program") == 0)
262 : {
263 32 : if (filename)
264 0 : ereport(ERROR,
265 : (errcode(ERRCODE_SYNTAX_ERROR),
266 : errmsg("conflicting or redundant options")));
267 :
268 : /*
269 : * Check permissions for changing which file or program is used by
270 : * the file_fdw.
271 : *
272 : * Only members of the role 'pg_read_server_files' are allowed to
273 : * set the 'filename' option of a file_fdw foreign table, while
274 : * only members of the role 'pg_execute_server_program' are
275 : * allowed to set the 'program' option. This is because we don't
276 : * want regular users to be able to control which file gets read
277 : * or which program gets executed.
278 : *
279 : * Putting this sort of permissions check in a validator is a bit
280 : * of a crock, but there doesn't seem to be any other place that
281 : * can enforce the check more cleanly.
282 : *
283 : * Note that the valid_options[] array disallows setting filename
284 : * and program at any options level other than foreign table ---
285 : * otherwise there'd still be a security hole.
286 : */
287 32 : if (strcmp(def->defname, "filename") == 0 &&
288 32 : !has_privs_of_role(GetUserId(), ROLE_PG_READ_SERVER_FILES))
289 2 : ereport(ERROR,
290 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
291 : errmsg("permission denied to set the \"%s\" option of a file_fdw foreign table",
292 : "filename"),
293 : errdetail("Only roles with privileges of the \"%s\" role may set this option.",
294 : "pg_read_server_files")));
295 :
296 30 : if (strcmp(def->defname, "program") == 0 &&
297 0 : !has_privs_of_role(GetUserId(), ROLE_PG_EXECUTE_SERVER_PROGRAM))
298 0 : ereport(ERROR,
299 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
300 : errmsg("permission denied to set the \"%s\" option of a file_fdw foreign table",
301 : "program"),
302 : errdetail("Only roles with privileges of the \"%s\" role may set this option.",
303 : "pg_execute_server_program")));
304 :
305 30 : filename = defGetString(def);
306 : }
307 :
308 : /*
309 : * force_not_null is a boolean option; after validation we can discard
310 : * it - it will be retrieved later in get_file_fdw_attribute_options()
311 : */
312 250 : else if (strcmp(def->defname, "force_not_null") == 0)
313 : {
314 8 : if (force_not_null)
315 0 : ereport(ERROR,
316 : (errcode(ERRCODE_SYNTAX_ERROR),
317 : errmsg("conflicting or redundant options"),
318 : errhint("Option \"force_not_null\" supplied more than once for a column.")));
319 8 : force_not_null = def;
320 : /* Don't care what the value is, as long as it's a legal boolean */
321 8 : (void) defGetBoolean(def);
322 : }
323 : /* See comments for force_not_null above */
324 242 : else if (strcmp(def->defname, "force_null") == 0)
325 : {
326 8 : if (force_null)
327 0 : ereport(ERROR,
328 : (errcode(ERRCODE_SYNTAX_ERROR),
329 : errmsg("conflicting or redundant options"),
330 : errhint("Option \"force_null\" supplied more than once for a column.")));
331 8 : force_null = def;
332 8 : (void) defGetBoolean(def);
333 : }
334 : else
335 234 : other_options = lappend(other_options, def);
336 : }
337 :
338 : /*
339 : * Now apply the core COPY code's validation logic for more checks.
340 : */
341 104 : ProcessCopyOptions(NULL, NULL, true, other_options);
342 :
343 : /*
344 : * Either filename or program option is required for file_fdw foreign
345 : * tables.
346 : */
347 54 : if (catalog == ForeignTableRelationId && filename == NULL)
348 2 : ereport(ERROR,
349 : (errcode(ERRCODE_FDW_DYNAMIC_PARAMETER_VALUE_NEEDED),
350 : errmsg("either filename or program is required for file_fdw foreign tables")));
351 :
352 52 : PG_RETURN_VOID();
353 : }
354 :
355 : /*
356 : * Check if the provided option is one of the valid options.
357 : * context is the Oid of the catalog holding the object the option is for.
358 : */
359 : static bool
360 298 : is_valid_option(const char *option, Oid context)
361 : {
362 : const struct FileFdwOption *opt;
363 :
364 1876 : for (opt = valid_options; opt->optname; opt++)
365 : {
366 1860 : if (context == opt->optcontext && strcmp(opt->optname, option) == 0)
367 282 : return true;
368 : }
369 16 : return false;
370 : }
371 :
372 : /*
373 : * Fetch the options for a file_fdw foreign table.
374 : *
375 : * We have to separate out filename/program from the other options because
376 : * those must not appear in the options list passed to the core COPY code.
377 : */
378 : static void
379 154 : fileGetOptions(Oid foreigntableid,
380 : char **filename, bool *is_program, List **other_options)
381 : {
382 : ForeignTable *table;
383 : ForeignServer *server;
384 : ForeignDataWrapper *wrapper;
385 : List *options;
386 : ListCell *lc;
387 :
388 : /*
389 : * Extract options from FDW objects. We ignore user mappings because
390 : * file_fdw doesn't have any options that can be specified there.
391 : *
392 : * (XXX Actually, given the current contents of valid_options[], there's
393 : * no point in examining anything except the foreign table's own options.
394 : * Simplify?)
395 : */
396 154 : table = GetForeignTable(foreigntableid);
397 154 : server = GetForeignServer(table->serverid);
398 154 : wrapper = GetForeignDataWrapper(server->fdwid);
399 :
400 154 : options = NIL;
401 154 : options = list_concat(options, wrapper->options);
402 154 : options = list_concat(options, server->options);
403 154 : options = list_concat(options, table->options);
404 154 : options = list_concat(options, get_file_fdw_attribute_options(foreigntableid));
405 :
406 : /*
407 : * Separate out the filename or program option (we assume there is only
408 : * one).
409 : */
410 154 : *filename = NULL;
411 154 : *is_program = false;
412 308 : foreach(lc, options)
413 : {
414 308 : DefElem *def = (DefElem *) lfirst(lc);
415 :
416 308 : if (strcmp(def->defname, "filename") == 0)
417 : {
418 154 : *filename = defGetString(def);
419 154 : options = foreach_delete_current(options, lc);
420 154 : break;
421 : }
422 154 : else if (strcmp(def->defname, "program") == 0)
423 : {
424 0 : *filename = defGetString(def);
425 0 : *is_program = true;
426 0 : options = foreach_delete_current(options, lc);
427 0 : break;
428 : }
429 : }
430 :
431 : /*
432 : * The validator should have checked that filename or program was included
433 : * in the options, but check again, just in case.
434 : */
435 154 : if (*filename == NULL)
436 0 : elog(ERROR, "either filename or program is required for file_fdw foreign tables");
437 :
438 154 : *other_options = options;
439 154 : }
440 :
441 : /*
442 : * Retrieve per-column generic options from pg_attribute and construct a list
443 : * of DefElems representing them.
444 : *
445 : * At the moment we only have "force_not_null", and "force_null",
446 : * which should each be combined into a single DefElem listing all such
447 : * columns, since that's what COPY expects.
448 : */
449 : static List *
450 154 : get_file_fdw_attribute_options(Oid relid)
451 : {
452 : Relation rel;
453 : TupleDesc tupleDesc;
454 : AttrNumber natts;
455 : AttrNumber attnum;
456 154 : List *fnncolumns = NIL;
457 154 : List *fncolumns = NIL;
458 :
459 154 : List *options = NIL;
460 :
461 154 : rel = table_open(relid, AccessShareLock);
462 154 : tupleDesc = RelationGetDescr(rel);
463 154 : natts = tupleDesc->natts;
464 :
465 : /* Retrieve FDW options for all user-defined attributes. */
466 486 : for (attnum = 1; attnum <= natts; attnum++)
467 : {
468 332 : Form_pg_attribute attr = TupleDescAttr(tupleDesc, attnum - 1);
469 : List *column_options;
470 : ListCell *lc;
471 :
472 : /* Skip dropped attributes. */
473 332 : if (attr->attisdropped)
474 0 : continue;
475 :
476 332 : column_options = GetForeignColumnOptions(relid, attnum);
477 364 : foreach(lc, column_options)
478 : {
479 32 : DefElem *def = (DefElem *) lfirst(lc);
480 :
481 32 : if (strcmp(def->defname, "force_not_null") == 0)
482 : {
483 16 : if (defGetBoolean(def))
484 : {
485 8 : char *attname = pstrdup(NameStr(attr->attname));
486 :
487 8 : fnncolumns = lappend(fnncolumns, makeString(attname));
488 : }
489 : }
490 16 : else if (strcmp(def->defname, "force_null") == 0)
491 : {
492 16 : if (defGetBoolean(def))
493 : {
494 8 : char *attname = pstrdup(NameStr(attr->attname));
495 :
496 8 : fncolumns = lappend(fncolumns, makeString(attname));
497 : }
498 : }
499 : /* maybe in future handle other column options here */
500 : }
501 : }
502 :
503 154 : table_close(rel, AccessShareLock);
504 :
505 : /*
506 : * Return DefElem only when some column(s) have force_not_null /
507 : * force_null options set
508 : */
509 154 : if (fnncolumns != NIL)
510 8 : options = lappend(options, makeDefElem("force_not_null", (Node *) fnncolumns, -1));
511 :
512 154 : if (fncolumns != NIL)
513 8 : options = lappend(options, makeDefElem("force_null", (Node *) fncolumns, -1));
514 :
515 154 : return options;
516 : }
517 :
518 : /*
519 : * fileGetForeignRelSize
520 : * Obtain relation size estimates for a foreign table
521 : */
522 : static void
523 80 : fileGetForeignRelSize(PlannerInfo *root,
524 : RelOptInfo *baserel,
525 : Oid foreigntableid)
526 : {
527 : FileFdwPlanState *fdw_private;
528 :
529 : /*
530 : * Fetch options. We only need filename (or program) at this point, but
531 : * we might as well get everything and not need to re-fetch it later in
532 : * planning.
533 : */
534 80 : fdw_private = (FileFdwPlanState *) palloc(sizeof(FileFdwPlanState));
535 80 : fileGetOptions(foreigntableid,
536 : &fdw_private->filename,
537 : &fdw_private->is_program,
538 : &fdw_private->options);
539 80 : baserel->fdw_private = fdw_private;
540 :
541 : /* Estimate relation size */
542 80 : estimate_size(root, baserel, fdw_private);
543 80 : }
544 :
545 : /*
546 : * fileGetForeignPaths
547 : * Create possible access paths for a scan on the foreign table
548 : *
549 : * Currently we don't support any push-down feature, so there is only one
550 : * possible access path, which simply returns all records in the order in
551 : * the data file.
552 : */
553 : static void
554 80 : fileGetForeignPaths(PlannerInfo *root,
555 : RelOptInfo *baserel,
556 : Oid foreigntableid)
557 : {
558 80 : FileFdwPlanState *fdw_private = (FileFdwPlanState *) baserel->fdw_private;
559 : Cost startup_cost;
560 : Cost total_cost;
561 : List *columns;
562 80 : List *coptions = NIL;
563 :
564 : /* Decide whether to selectively perform binary conversion */
565 80 : if (check_selective_binary_conversion(baserel,
566 : foreigntableid,
567 : &columns))
568 8 : coptions = list_make1(makeDefElem("convert_selectively",
569 : (Node *) columns, -1));
570 :
571 : /* Estimate costs */
572 80 : estimate_costs(root, baserel, fdw_private,
573 : &startup_cost, &total_cost);
574 :
575 : /*
576 : * Create a ForeignPath node and add it as only possible path. We use the
577 : * fdw_private list of the path to carry the convert_selectively option;
578 : * it will be propagated into the fdw_private list of the Plan node.
579 : *
580 : * We don't support pushing join clauses into the quals of this path, but
581 : * it could still have required parameterization due to LATERAL refs in
582 : * its tlist.
583 : */
584 80 : add_path(baserel, (Path *)
585 80 : create_foreignscan_path(root, baserel,
586 : NULL, /* default pathtarget */
587 : baserel->rows,
588 : 0,
589 : startup_cost,
590 : total_cost,
591 : NIL, /* no pathkeys */
592 : baserel->lateral_relids,
593 : NULL, /* no extra plan */
594 : NIL, /* no fdw_restrictinfo list */
595 : coptions));
596 :
597 : /*
598 : * If data file was sorted, and we knew it somehow, we could insert
599 : * appropriate pathkeys into the ForeignPath node to tell the planner
600 : * that.
601 : */
602 80 : }
603 :
604 : /*
605 : * fileGetForeignPlan
606 : * Create a ForeignScan plan node for scanning the foreign table
607 : */
608 : static ForeignScan *
609 80 : fileGetForeignPlan(PlannerInfo *root,
610 : RelOptInfo *baserel,
611 : Oid foreigntableid,
612 : ForeignPath *best_path,
613 : List *tlist,
614 : List *scan_clauses,
615 : Plan *outer_plan)
616 : {
617 80 : Index scan_relid = baserel->relid;
618 :
619 : /*
620 : * We have no native ability to evaluate restriction clauses, so we just
621 : * put all the scan_clauses into the plan node's qual list for the
622 : * executor to check. So all we have to do here is strip RestrictInfo
623 : * nodes from the clauses and ignore pseudoconstants (which will be
624 : * handled elsewhere).
625 : */
626 80 : scan_clauses = extract_actual_clauses(scan_clauses, false);
627 :
628 : /* Create the ForeignScan node */
629 80 : return make_foreignscan(tlist,
630 : scan_clauses,
631 : scan_relid,
632 : NIL, /* no expressions to evaluate */
633 : best_path->fdw_private,
634 : NIL, /* no custom tlist */
635 : NIL, /* no remote quals */
636 : outer_plan);
637 : }
638 :
639 : /*
640 : * fileExplainForeignScan
641 : * Produce extra output for EXPLAIN
642 : */
643 : static void
644 6 : fileExplainForeignScan(ForeignScanState *node, ExplainState *es)
645 : {
646 : char *filename;
647 : bool is_program;
648 : List *options;
649 :
650 : /* Fetch options --- we only need filename and is_program at this point */
651 6 : fileGetOptions(RelationGetRelid(node->ss.ss_currentRelation),
652 : &filename, &is_program, &options);
653 :
654 6 : if (is_program)
655 0 : ExplainPropertyText("Foreign Program", filename, es);
656 : else
657 6 : ExplainPropertyText("Foreign File", filename, es);
658 :
659 : /* Suppress file size if we're not showing cost details */
660 6 : if (es->costs)
661 : {
662 : struct stat stat_buf;
663 :
664 0 : if (!is_program &&
665 0 : stat(filename, &stat_buf) == 0)
666 0 : ExplainPropertyInteger("Foreign File Size", "b",
667 0 : (int64) stat_buf.st_size, es);
668 : }
669 6 : }
670 :
671 : /*
672 : * fileBeginForeignScan
673 : * Initiate access to the file by creating CopyState
674 : */
675 : static void
676 70 : fileBeginForeignScan(ForeignScanState *node, int eflags)
677 : {
678 70 : ForeignScan *plan = (ForeignScan *) node->ss.ps.plan;
679 : char *filename;
680 : bool is_program;
681 : List *options;
682 : CopyFromState cstate;
683 : FileFdwExecutionState *festate;
684 :
685 : /*
686 : * Do nothing in EXPLAIN (no ANALYZE) case. node->fdw_state stays NULL.
687 : */
688 70 : if (eflags & EXEC_FLAG_EXPLAIN_ONLY)
689 6 : return;
690 :
691 : /* Fetch options of foreign table */
692 64 : fileGetOptions(RelationGetRelid(node->ss.ss_currentRelation),
693 : &filename, &is_program, &options);
694 :
695 : /* Add any options from the plan (currently only convert_selectively) */
696 64 : options = list_concat(options, plan->fdw_private);
697 :
698 : /*
699 : * Create CopyState from FDW options. We always acquire all columns, so
700 : * as to match the expected ScanTupleSlot signature.
701 : */
702 64 : cstate = BeginCopyFrom(NULL,
703 : node->ss.ss_currentRelation,
704 : NULL,
705 : filename,
706 : is_program,
707 : NULL,
708 : NIL,
709 : options);
710 :
711 : /*
712 : * Save state in node->fdw_state. We must save enough information to call
713 : * BeginCopyFrom() again.
714 : */
715 62 : festate = (FileFdwExecutionState *) palloc(sizeof(FileFdwExecutionState));
716 62 : festate->filename = filename;
717 62 : festate->is_program = is_program;
718 62 : festate->options = options;
719 62 : festate->cstate = cstate;
720 :
721 62 : node->fdw_state = festate;
722 : }
723 :
724 : /*
725 : * fileIterateForeignScan
726 : * Read next record from the data file and store it into the
727 : * ScanTupleSlot as a virtual tuple
728 : */
729 : static TupleTableSlot *
730 246 : fileIterateForeignScan(ForeignScanState *node)
731 : {
732 246 : FileFdwExecutionState *festate = (FileFdwExecutionState *) node->fdw_state;
733 246 : EState *estate = CreateExecutorState();
734 : ExprContext *econtext;
735 246 : MemoryContext oldcontext = CurrentMemoryContext;
736 246 : TupleTableSlot *slot = node->ss.ss_ScanTupleSlot;
737 246 : CopyFromState cstate = festate->cstate;
738 : ErrorContextCallback errcallback;
739 :
740 : /* Set up callback to identify error line number. */
741 246 : errcallback.callback = CopyFromErrorCallback;
742 246 : errcallback.arg = cstate;
743 246 : errcallback.previous = error_context_stack;
744 246 : error_context_stack = &errcallback;
745 :
746 : /*
747 : * We pass ExprContext because there might be a use of the DEFAULT option
748 : * in COPY FROM, so we may need to evaluate default expressions.
749 : */
750 246 : econtext = GetPerTupleExprContext(estate);
751 :
752 260 : retry:
753 :
754 : /*
755 : * DEFAULT expressions need to be evaluated in a per-tuple context, so
756 : * switch in case we are doing that.
757 : */
758 260 : MemoryContextSwitchTo(GetPerTupleMemoryContext(estate));
759 :
760 : /*
761 : * The protocol for loading a virtual tuple into a slot is first
762 : * ExecClearTuple, then fill the values/isnull arrays, then
763 : * ExecStoreVirtualTuple. If we don't find another row in the file, we
764 : * just skip the last step, leaving the slot empty as required.
765 : *
766 : */
767 260 : ExecClearTuple(slot);
768 :
769 260 : if (NextCopyFrom(cstate, econtext, slot->tts_values, slot->tts_isnull))
770 : {
771 196 : if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
772 32 : cstate->escontext->error_occurred)
773 : {
774 : /*
775 : * Soft error occurred, skip this tuple and just make
776 : * ErrorSaveContext ready for the next NextCopyFrom. Since we
777 : * don't set details_wanted and error_data is not to be filled,
778 : * just resetting error_occurred is enough.
779 : */
780 16 : cstate->escontext->error_occurred = false;
781 :
782 : /* Switch back to original memory context */
783 16 : MemoryContextSwitchTo(oldcontext);
784 :
785 : /*
786 : * Make sure we are interruptible while repeatedly calling
787 : * NextCopyFrom() until no soft error occurs.
788 : */
789 16 : CHECK_FOR_INTERRUPTS();
790 :
791 : /*
792 : * Reset the per-tuple exprcontext, to clean-up after expression
793 : * evaluations etc.
794 : */
795 16 : ResetPerTupleExprContext(estate);
796 :
797 16 : if (cstate->opts.reject_limit > 0 &&
798 8 : cstate->num_errors > cstate->opts.reject_limit)
799 2 : ereport(ERROR,
800 : (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
801 : errmsg("skipped more than REJECT_LIMIT (%" PRId64 ") rows due to data type incompatibility",
802 : cstate->opts.reject_limit)));
803 :
804 : /* Repeat NextCopyFrom() until no soft error occurs */
805 14 : goto retry;
806 : }
807 :
808 180 : ExecStoreVirtualTuple(slot);
809 : }
810 :
811 : /* Switch back to original memory context */
812 240 : MemoryContextSwitchTo(oldcontext);
813 :
814 : /* Remove error callback. */
815 240 : error_context_stack = errcallback.previous;
816 :
817 240 : return slot;
818 : }
819 :
820 : /*
821 : * fileReScanForeignScan
822 : * Rescan table, possibly with new parameters
823 : */
824 : static void
825 6 : fileReScanForeignScan(ForeignScanState *node)
826 : {
827 6 : FileFdwExecutionState *festate = (FileFdwExecutionState *) node->fdw_state;
828 :
829 6 : EndCopyFrom(festate->cstate);
830 :
831 12 : festate->cstate = BeginCopyFrom(NULL,
832 : node->ss.ss_currentRelation,
833 : NULL,
834 6 : festate->filename,
835 6 : festate->is_program,
836 : NULL,
837 : NIL,
838 : festate->options);
839 6 : }
840 :
841 : /*
842 : * fileEndForeignScan
843 : * Finish scanning foreign table and dispose objects used for this scan
844 : */
845 : static void
846 62 : fileEndForeignScan(ForeignScanState *node)
847 : {
848 62 : FileFdwExecutionState *festate = (FileFdwExecutionState *) node->fdw_state;
849 :
850 : /* if festate is NULL, we are in EXPLAIN; nothing to do */
851 62 : if (!festate)
852 6 : return;
853 :
854 56 : if (festate->cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
855 6 : festate->cstate->num_errors > 0 &&
856 6 : festate->cstate->opts.log_verbosity >= COPY_LOG_VERBOSITY_DEFAULT)
857 2 : ereport(NOTICE,
858 : errmsg_plural("%" PRIu64 " row was skipped due to data type incompatibility",
859 : "%" PRIu64 " rows were skipped due to data type incompatibility",
860 : festate->cstate->num_errors,
861 : festate->cstate->num_errors));
862 :
863 56 : EndCopyFrom(festate->cstate);
864 : }
865 :
866 : /*
867 : * fileAnalyzeForeignTable
868 : * Test whether analyzing this foreign table is supported
869 : */
870 : static bool
871 2 : fileAnalyzeForeignTable(Relation relation,
872 : AcquireSampleRowsFunc *func,
873 : BlockNumber *totalpages)
874 : {
875 : char *filename;
876 : bool is_program;
877 : List *options;
878 : struct stat stat_buf;
879 :
880 : /* Fetch options of foreign table */
881 2 : fileGetOptions(RelationGetRelid(relation), &filename, &is_program, &options);
882 :
883 : /*
884 : * If this is a program instead of a file, just return false to skip
885 : * analyzing the table. We could run the program and collect stats on
886 : * whatever it currently returns, but it seems likely that in such cases
887 : * the output would be too volatile for the stats to be useful. Maybe
888 : * there should be an option to enable doing this?
889 : */
890 2 : if (is_program)
891 0 : return false;
892 :
893 : /*
894 : * Get size of the file. (XXX if we fail here, would it be better to just
895 : * return false to skip analyzing the table?)
896 : */
897 2 : if (stat(filename, &stat_buf) < 0)
898 0 : ereport(ERROR,
899 : (errcode_for_file_access(),
900 : errmsg("could not stat file \"%s\": %m",
901 : filename)));
902 :
903 : /*
904 : * Convert size to pages. Must return at least 1 so that we can tell
905 : * later on that pg_class.relpages is not default.
906 : */
907 2 : *totalpages = (stat_buf.st_size + (BLCKSZ - 1)) / BLCKSZ;
908 2 : if (*totalpages < 1)
909 0 : *totalpages = 1;
910 :
911 2 : *func = file_acquire_sample_rows;
912 :
913 2 : return true;
914 : }
915 :
916 : /*
917 : * fileIsForeignScanParallelSafe
918 : * Reading a file, or external program, in a parallel worker should work
919 : * just the same as reading it in the leader, so mark scans safe.
920 : */
921 : static bool
922 72 : fileIsForeignScanParallelSafe(PlannerInfo *root, RelOptInfo *rel,
923 : RangeTblEntry *rte)
924 : {
925 72 : return true;
926 : }
927 :
928 : /*
929 : * check_selective_binary_conversion
930 : *
931 : * Check to see if it's useful to convert only a subset of the file's columns
932 : * to binary. If so, construct a list of the column names to be converted,
933 : * return that at *columns, and return true. (Note that it's possible to
934 : * determine that no columns need be converted, for instance with a COUNT(*)
935 : * query. So we can't use returning a NIL list to indicate failure.)
936 : */
937 : static bool
938 80 : check_selective_binary_conversion(RelOptInfo *baserel,
939 : Oid foreigntableid,
940 : List **columns)
941 : {
942 : ForeignTable *table;
943 : ListCell *lc;
944 : Relation rel;
945 : TupleDesc tupleDesc;
946 : int attidx;
947 80 : Bitmapset *attrs_used = NULL;
948 80 : bool has_wholerow = false;
949 : int numattrs;
950 : int i;
951 :
952 80 : *columns = NIL; /* default result */
953 :
954 : /*
955 : * Check format of the file. If binary format, this is irrelevant.
956 : */
957 80 : table = GetForeignTable(foreigntableid);
958 80 : foreach(lc, table->options)
959 : {
960 80 : DefElem *def = (DefElem *) lfirst(lc);
961 :
962 80 : if (strcmp(def->defname, "format") == 0)
963 : {
964 80 : char *format = defGetString(def);
965 :
966 80 : if (strcmp(format, "binary") == 0)
967 0 : return false;
968 80 : break;
969 : }
970 : }
971 :
972 : /* Collect all the attributes needed for joins or final output. */
973 80 : pull_varattnos((Node *) baserel->reltarget->exprs, baserel->relid,
974 : &attrs_used);
975 :
976 : /* Add all the attributes used by restriction clauses. */
977 96 : foreach(lc, baserel->baserestrictinfo)
978 : {
979 16 : RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
980 :
981 16 : pull_varattnos((Node *) rinfo->clause, baserel->relid,
982 : &attrs_used);
983 : }
984 :
985 : /* Convert attribute numbers to column names. */
986 80 : rel = table_open(foreigntableid, AccessShareLock);
987 80 : tupleDesc = RelationGetDescr(rel);
988 :
989 80 : attidx = -1;
990 254 : while ((attidx = bms_next_member(attrs_used, attidx)) >= 0)
991 : {
992 : /* attidx is zero-based, attnum is the normal attribute number */
993 182 : AttrNumber attnum = attidx + FirstLowInvalidHeapAttributeNumber;
994 :
995 182 : if (attnum == 0)
996 : {
997 8 : has_wholerow = true;
998 8 : break;
999 : }
1000 :
1001 : /* Ignore system attributes. */
1002 174 : if (attnum < 0)
1003 26 : continue;
1004 :
1005 : /* Get user attributes. */
1006 148 : if (attnum > 0)
1007 : {
1008 148 : Form_pg_attribute attr = TupleDescAttr(tupleDesc, attnum - 1);
1009 148 : char *attname = NameStr(attr->attname);
1010 :
1011 : /* Skip dropped attributes (probably shouldn't see any here). */
1012 148 : if (attr->attisdropped)
1013 0 : continue;
1014 :
1015 : /*
1016 : * Skip generated columns (COPY won't accept them in the column
1017 : * list)
1018 : */
1019 148 : if (attr->attgenerated)
1020 2 : continue;
1021 146 : *columns = lappend(*columns, makeString(pstrdup(attname)));
1022 : }
1023 : }
1024 :
1025 : /* Count non-dropped user attributes while we have the tupdesc. */
1026 80 : numattrs = 0;
1027 252 : for (i = 0; i < tupleDesc->natts; i++)
1028 : {
1029 172 : Form_pg_attribute attr = TupleDescAttr(tupleDesc, i);
1030 :
1031 172 : if (attr->attisdropped)
1032 0 : continue;
1033 172 : numattrs++;
1034 : }
1035 :
1036 80 : table_close(rel, AccessShareLock);
1037 :
1038 : /* If there's a whole-row reference, fail: we need all the columns. */
1039 80 : if (has_wholerow)
1040 : {
1041 8 : *columns = NIL;
1042 8 : return false;
1043 : }
1044 :
1045 : /* If all the user attributes are needed, fail. */
1046 72 : if (numattrs == list_length(*columns))
1047 : {
1048 64 : *columns = NIL;
1049 64 : return false;
1050 : }
1051 :
1052 8 : return true;
1053 : }
1054 :
1055 : /*
1056 : * Estimate size of a foreign table.
1057 : *
1058 : * The main result is returned in baserel->rows. We also set
1059 : * fdw_private->pages and fdw_private->ntuples for later use in the cost
1060 : * calculation.
1061 : */
1062 : static void
1063 80 : estimate_size(PlannerInfo *root, RelOptInfo *baserel,
1064 : FileFdwPlanState *fdw_private)
1065 : {
1066 : struct stat stat_buf;
1067 : BlockNumber pages;
1068 : double ntuples;
1069 : double nrows;
1070 :
1071 : /*
1072 : * Get size of the file. It might not be there at plan time, though, in
1073 : * which case we have to use a default estimate. We also have to fall
1074 : * back to the default if using a program as the input.
1075 : */
1076 80 : if (fdw_private->is_program || stat(fdw_private->filename, &stat_buf) < 0)
1077 0 : stat_buf.st_size = 10 * BLCKSZ;
1078 :
1079 : /*
1080 : * Convert size to pages for use in I/O cost estimate later.
1081 : */
1082 80 : pages = (stat_buf.st_size + (BLCKSZ - 1)) / BLCKSZ;
1083 80 : if (pages < 1)
1084 0 : pages = 1;
1085 80 : fdw_private->pages = pages;
1086 :
1087 : /*
1088 : * Estimate the number of tuples in the file.
1089 : */
1090 80 : if (baserel->tuples >= 0 && baserel->pages > 0)
1091 0 : {
1092 : /*
1093 : * We have # of pages and # of tuples from pg_class (that is, from a
1094 : * previous ANALYZE), so compute a tuples-per-page estimate and scale
1095 : * that by the current file size.
1096 : */
1097 : double density;
1098 :
1099 0 : density = baserel->tuples / (double) baserel->pages;
1100 0 : ntuples = clamp_row_est(density * (double) pages);
1101 : }
1102 : else
1103 : {
1104 : /*
1105 : * Otherwise we have to fake it. We back into this estimate using the
1106 : * planner's idea of the relation width; which is bogus if not all
1107 : * columns are being read, not to mention that the text representation
1108 : * of a row probably isn't the same size as its internal
1109 : * representation. Possibly we could do something better, but the
1110 : * real answer to anyone who complains is "ANALYZE" ...
1111 : */
1112 : int tuple_width;
1113 :
1114 80 : tuple_width = MAXALIGN(baserel->reltarget->width) +
1115 : MAXALIGN(SizeofHeapTupleHeader);
1116 80 : ntuples = clamp_row_est((double) stat_buf.st_size /
1117 80 : (double) tuple_width);
1118 : }
1119 80 : fdw_private->ntuples = ntuples;
1120 :
1121 : /*
1122 : * Now estimate the number of rows returned by the scan after applying the
1123 : * baserestrictinfo quals.
1124 : */
1125 80 : nrows = ntuples *
1126 80 : clauselist_selectivity(root,
1127 : baserel->baserestrictinfo,
1128 : 0,
1129 : JOIN_INNER,
1130 : NULL);
1131 :
1132 80 : nrows = clamp_row_est(nrows);
1133 :
1134 : /* Save the output-rows estimate for the planner */
1135 80 : baserel->rows = nrows;
1136 80 : }
1137 :
1138 : /*
1139 : * Estimate costs of scanning a foreign table.
1140 : *
1141 : * Results are returned in *startup_cost and *total_cost.
1142 : */
1143 : static void
1144 80 : estimate_costs(PlannerInfo *root, RelOptInfo *baserel,
1145 : FileFdwPlanState *fdw_private,
1146 : Cost *startup_cost, Cost *total_cost)
1147 : {
1148 80 : BlockNumber pages = fdw_private->pages;
1149 80 : double ntuples = fdw_private->ntuples;
1150 80 : Cost run_cost = 0;
1151 : Cost cpu_per_tuple;
1152 :
1153 : /*
1154 : * We estimate costs almost the same way as cost_seqscan(), thus assuming
1155 : * that I/O costs are equivalent to a regular table file of the same size.
1156 : * However, we take per-tuple CPU costs as 10x of a seqscan, to account
1157 : * for the cost of parsing records.
1158 : *
1159 : * In the case of a program source, this calculation is even more divorced
1160 : * from reality, but we have no good alternative; and it's not clear that
1161 : * the numbers we produce here matter much anyway, since there's only one
1162 : * access path for the rel.
1163 : */
1164 80 : run_cost += seq_page_cost * pages;
1165 :
1166 80 : *startup_cost = baserel->baserestrictcost.startup;
1167 80 : cpu_per_tuple = cpu_tuple_cost * 10 + baserel->baserestrictcost.per_tuple;
1168 80 : run_cost += cpu_per_tuple * ntuples;
1169 80 : *total_cost = *startup_cost + run_cost;
1170 80 : }
1171 :
1172 : /*
1173 : * file_acquire_sample_rows -- acquire a random sample of rows from the table
1174 : *
1175 : * Selected rows are returned in the caller-allocated array rows[],
1176 : * which must have at least targrows entries.
1177 : * The actual number of rows selected is returned as the function result.
1178 : * We also count the total number of rows in the file and return it into
1179 : * *totalrows. Rows skipped due to on_error = 'ignore' are not included
1180 : * in this count. Note that *totaldeadrows is always set to 0.
1181 : *
1182 : * Note that the returned list of rows is not always in order by physical
1183 : * position in the file. Therefore, correlation estimates derived later
1184 : * may be meaningless, but it's OK because we don't use the estimates
1185 : * currently (the planner only pays attention to correlation for indexscans).
1186 : */
1187 : static int
1188 2 : file_acquire_sample_rows(Relation onerel, int elevel,
1189 : HeapTuple *rows, int targrows,
1190 : double *totalrows, double *totaldeadrows)
1191 : {
1192 2 : int numrows = 0;
1193 2 : double rowstoskip = -1; /* -1 means not set yet */
1194 : ReservoirStateData rstate;
1195 : TupleDesc tupDesc;
1196 : Datum *values;
1197 : bool *nulls;
1198 : bool found;
1199 : char *filename;
1200 : bool is_program;
1201 : List *options;
1202 : CopyFromState cstate;
1203 : ErrorContextCallback errcallback;
1204 2 : MemoryContext oldcontext = CurrentMemoryContext;
1205 : MemoryContext tupcontext;
1206 :
1207 : Assert(onerel);
1208 : Assert(targrows > 0);
1209 :
1210 2 : tupDesc = RelationGetDescr(onerel);
1211 2 : values = (Datum *) palloc(tupDesc->natts * sizeof(Datum));
1212 2 : nulls = (bool *) palloc(tupDesc->natts * sizeof(bool));
1213 :
1214 : /* Fetch options of foreign table */
1215 2 : fileGetOptions(RelationGetRelid(onerel), &filename, &is_program, &options);
1216 :
1217 : /*
1218 : * Create CopyState from FDW options.
1219 : */
1220 2 : cstate = BeginCopyFrom(NULL, onerel, NULL, filename, is_program, NULL, NIL,
1221 : options);
1222 :
1223 : /*
1224 : * Use per-tuple memory context to prevent leak of memory used to read
1225 : * rows from the file with Copy routines.
1226 : */
1227 2 : tupcontext = AllocSetContextCreate(CurrentMemoryContext,
1228 : "file_fdw temporary context",
1229 : ALLOCSET_DEFAULT_SIZES);
1230 :
1231 : /* Prepare for sampling rows */
1232 2 : reservoir_init_selection_state(&rstate, targrows);
1233 :
1234 : /* Set up callback to identify error line number. */
1235 2 : errcallback.callback = CopyFromErrorCallback;
1236 2 : errcallback.arg = cstate;
1237 2 : errcallback.previous = error_context_stack;
1238 2 : error_context_stack = &errcallback;
1239 :
1240 2 : *totalrows = 0;
1241 2 : *totaldeadrows = 0;
1242 : for (;;)
1243 : {
1244 : /* Check for user-requested abort or sleep */
1245 10 : vacuum_delay_point(true);
1246 :
1247 : /* Fetch next row */
1248 10 : MemoryContextReset(tupcontext);
1249 10 : MemoryContextSwitchTo(tupcontext);
1250 :
1251 10 : found = NextCopyFrom(cstate, NULL, values, nulls);
1252 :
1253 10 : MemoryContextSwitchTo(oldcontext);
1254 :
1255 10 : if (!found)
1256 2 : break;
1257 :
1258 8 : if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
1259 8 : cstate->escontext->error_occurred)
1260 : {
1261 : /*
1262 : * Soft error occurred, skip this tuple and just make
1263 : * ErrorSaveContext ready for the next NextCopyFrom. Since we
1264 : * don't set details_wanted and error_data is not to be filled,
1265 : * just resetting error_occurred is enough.
1266 : */
1267 4 : cstate->escontext->error_occurred = false;
1268 :
1269 : /* Repeat NextCopyFrom() until no soft error occurs */
1270 4 : continue;
1271 : }
1272 :
1273 : /*
1274 : * The first targrows sample rows are simply copied into the
1275 : * reservoir. Then we start replacing tuples in the sample until we
1276 : * reach the end of the relation. This algorithm is from Jeff Vitter's
1277 : * paper (see more info in commands/analyze.c).
1278 : */
1279 4 : if (numrows < targrows)
1280 : {
1281 4 : rows[numrows++] = heap_form_tuple(tupDesc, values, nulls);
1282 : }
1283 : else
1284 : {
1285 : /*
1286 : * t in Vitter's paper is the number of records already processed.
1287 : * If we need to compute a new S value, we must use the
1288 : * not-yet-incremented value of totalrows as t.
1289 : */
1290 0 : if (rowstoskip < 0)
1291 0 : rowstoskip = reservoir_get_next_S(&rstate, *totalrows, targrows);
1292 :
1293 0 : if (rowstoskip <= 0)
1294 : {
1295 : /*
1296 : * Found a suitable tuple, so save it, replacing one old tuple
1297 : * at random
1298 : */
1299 0 : int k = (int) (targrows * sampler_random_fract(&rstate.randstate));
1300 :
1301 : Assert(k >= 0 && k < targrows);
1302 0 : heap_freetuple(rows[k]);
1303 0 : rows[k] = heap_form_tuple(tupDesc, values, nulls);
1304 : }
1305 :
1306 0 : rowstoskip -= 1;
1307 : }
1308 :
1309 4 : *totalrows += 1;
1310 : }
1311 :
1312 : /* Remove error callback. */
1313 2 : error_context_stack = errcallback.previous;
1314 :
1315 : /* Clean up. */
1316 2 : MemoryContextDelete(tupcontext);
1317 :
1318 2 : if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
1319 2 : cstate->num_errors > 0 &&
1320 2 : cstate->opts.log_verbosity >= COPY_LOG_VERBOSITY_DEFAULT)
1321 0 : ereport(NOTICE,
1322 : errmsg_plural("%" PRIu64 " row was skipped due to data type incompatibility",
1323 : "%" PRIu64 " rows were skipped due to data type incompatibility",
1324 : cstate->num_errors,
1325 : cstate->num_errors));
1326 :
1327 2 : EndCopyFrom(cstate);
1328 :
1329 2 : pfree(values);
1330 2 : pfree(nulls);
1331 :
1332 : /*
1333 : * Emit some interesting relation info
1334 : */
1335 2 : ereport(elevel,
1336 : (errmsg("\"%s\": file contains %.0f rows; "
1337 : "%d rows in sample",
1338 : RelationGetRelationName(onerel),
1339 : *totalrows, numrows)));
1340 :
1341 2 : return numrows;
1342 : }
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