PostgreSQL Source Code  git master
guc_funcs.c File Reference
#include "postgres.h"
#include <sys/stat.h>
#include <unistd.h>
#include "access/xact.h"
#include "catalog/objectaccess.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_parameter_acl.h"
#include "funcapi.h"
#include "guc_internal.h"
#include "miscadmin.h"
#include "parser/parse_type.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/guc_tables.h"
#include "utils/snapmgr.h"
Include dependency graph for guc_funcs.c:

Go to the source code of this file.

Macros

#define MAX_GUC_FLAGS   6
 
#define NUM_PG_SETTINGS_ATTS   17
 
#define NUM_PG_FILE_SETTINGS_ATTS   7
 

Functions

static char * flatten_set_variable_args (const char *name, List *args)
 
static void ShowGUCConfigOption (const char *name, DestReceiver *dest)
 
static void ShowAllGUCConfig (DestReceiver *dest)
 
void ExecSetVariableStmt (VariableSetStmt *stmt, bool isTopLevel)
 
char * ExtractSetVariableArgs (VariableSetStmt *stmt)
 
void SetPGVariable (const char *name, List *args, bool is_local)
 
Datum set_config_by_name (PG_FUNCTION_ARGS)
 
void GetPGVariable (const char *name, DestReceiver *dest)
 
TupleDesc GetPGVariableResultDesc (const char *name)
 
Datum pg_settings_get_flags (PG_FUNCTION_ARGS)
 
bool ConfigOptionIsVisible (struct config_generic *conf)
 
static void GetConfigOptionValues (struct config_generic *conf, const char **values)
 
Datum show_config_by_name (PG_FUNCTION_ARGS)
 
Datum show_config_by_name_missing_ok (PG_FUNCTION_ARGS)
 
Datum show_all_settings (PG_FUNCTION_ARGS)
 
Datum show_all_file_settings (PG_FUNCTION_ARGS)
 

Macro Definition Documentation

◆ MAX_GUC_FLAGS

#define MAX_GUC_FLAGS   6

◆ NUM_PG_FILE_SETTINGS_ATTS

#define NUM_PG_FILE_SETTINGS_ATTS   7

◆ NUM_PG_SETTINGS_ATTS

#define NUM_PG_SETTINGS_ATTS   17

Definition at line 846 of file guc_funcs.c.

Function Documentation

◆ ConfigOptionIsVisible()

bool ConfigOptionIsVisible ( struct config_generic conf)

Definition at line 581 of file guc_funcs.c.

582 {
583  if ((conf->flags & GUC_SUPERUSER_ONLY) &&
584  !has_privs_of_role(GetUserId(), ROLE_PG_READ_ALL_SETTINGS))
585  return false;
586  else
587  return true;
588 }
bool has_privs_of_role(Oid member, Oid role)
Definition: acl.c:5128
#define GUC_SUPERUSER_ONLY
Definition: guc.h:220
Oid GetUserId(void)
Definition: miscinit.c:514

References config_generic::flags, GetUserId(), GUC_SUPERUSER_ONLY, and has_privs_of_role().

Referenced by get_explain_guc_options(), GetConfigOption(), GetConfigOptionByName(), GetConfigOptionResetString(), show_all_settings(), and ShowAllGUCConfig().

◆ ExecSetVariableStmt()

void ExecSetVariableStmt ( VariableSetStmt stmt,
bool  isTopLevel 
)

Definition at line 43 of file guc_funcs.c.

44 {
46 
47  /*
48  * Workers synchronize these parameters at the start of the parallel
49  * operation; then, we block SET during the operation.
50  */
51  if (IsInParallelMode())
52  ereport(ERROR,
53  (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
54  errmsg("cannot set parameters during a parallel operation")));
55 
56  switch (stmt->kind)
57  {
58  case VAR_SET_VALUE:
59  case VAR_SET_CURRENT:
60  if (stmt->is_local)
61  WarnNoTransactionBlock(isTopLevel, "SET LOCAL");
62  (void) set_config_option(stmt->name,
66  action, true, 0, false);
67  break;
68  case VAR_SET_MULTI:
69 
70  /*
71  * Special-case SQL syntaxes. The TRANSACTION and SESSION
72  * CHARACTERISTICS cases effectively set more than one variable
73  * per statement. TRANSACTION SNAPSHOT only takes one argument,
74  * but we put it here anyway since it's a special case and not
75  * related to any GUC variable.
76  */
77  if (strcmp(stmt->name, "TRANSACTION") == 0)
78  {
79  ListCell *head;
80 
81  WarnNoTransactionBlock(isTopLevel, "SET TRANSACTION");
82 
83  foreach(head, stmt->args)
84  {
85  DefElem *item = (DefElem *) lfirst(head);
86 
87  if (strcmp(item->defname, "transaction_isolation") == 0)
88  SetPGVariable("transaction_isolation",
89  list_make1(item->arg), stmt->is_local);
90  else if (strcmp(item->defname, "transaction_read_only") == 0)
91  SetPGVariable("transaction_read_only",
92  list_make1(item->arg), stmt->is_local);
93  else if (strcmp(item->defname, "transaction_deferrable") == 0)
94  SetPGVariable("transaction_deferrable",
95  list_make1(item->arg), stmt->is_local);
96  else
97  elog(ERROR, "unexpected SET TRANSACTION element: %s",
98  item->defname);
99  }
100  }
101  else if (strcmp(stmt->name, "SESSION CHARACTERISTICS") == 0)
102  {
103  ListCell *head;
104 
105  foreach(head, stmt->args)
106  {
107  DefElem *item = (DefElem *) lfirst(head);
108 
109  if (strcmp(item->defname, "transaction_isolation") == 0)
110  SetPGVariable("default_transaction_isolation",
111  list_make1(item->arg), stmt->is_local);
112  else if (strcmp(item->defname, "transaction_read_only") == 0)
113  SetPGVariable("default_transaction_read_only",
114  list_make1(item->arg), stmt->is_local);
115  else if (strcmp(item->defname, "transaction_deferrable") == 0)
116  SetPGVariable("default_transaction_deferrable",
117  list_make1(item->arg), stmt->is_local);
118  else
119  elog(ERROR, "unexpected SET SESSION element: %s",
120  item->defname);
121  }
122  }
123  else if (strcmp(stmt->name, "TRANSACTION SNAPSHOT") == 0)
124  {
125  A_Const *con = linitial_node(A_Const, stmt->args);
126 
127  if (stmt->is_local)
128  ereport(ERROR,
129  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
130  errmsg("SET LOCAL TRANSACTION SNAPSHOT is not implemented")));
131 
132  WarnNoTransactionBlock(isTopLevel, "SET TRANSACTION");
133  ImportSnapshot(strVal(&con->val));
134  }
135  else
136  elog(ERROR, "unexpected SET MULTI element: %s",
137  stmt->name);
138  break;
139  case VAR_SET_DEFAULT:
140  if (stmt->is_local)
141  WarnNoTransactionBlock(isTopLevel, "SET LOCAL");
142  /* fall through */
143  case VAR_RESET:
144  (void) set_config_option(stmt->name,
145  NULL,
148  action, true, 0, false);
149  break;
150  case VAR_RESET_ALL:
151  ResetAllOptions();
152  break;
153  }
154 
155  /* Invoke the post-alter hook for setting this GUC variable, by name. */
156  InvokeObjectPostAlterHookArgStr(ParameterAclRelationId, stmt->name,
157  ACL_SET, stmt->kind, false);
158 }
int errcode(int sqlerrcode)
Definition: elog.c:857
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:224
#define ereport(elevel,...)
Definition: elog.h:149
void ResetAllOptions(void)
Definition: guc.c:2005
int set_config_option(const char *name, const char *value, GucContext context, GucSource source, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3343
GucAction
Definition: guc.h:197
@ GUC_ACTION_SET
Definition: guc.h:199
@ GUC_ACTION_LOCAL
Definition: guc.h:200
@ PGC_S_SESSION
Definition: guc.h:122
@ PGC_SUSET
Definition: guc.h:74
@ PGC_USERSET
Definition: guc.h:75
void SetPGVariable(const char *name, List *args, bool is_local)
Definition: guc_funcs.c:315
char * ExtractSetVariableArgs(VariableSetStmt *stmt)
Definition: guc_funcs.c:167
#define stmt
Definition: indent_codes.h:59
#define InvokeObjectPostAlterHookArgStr(classId, objectName, subId, auxiliaryId, is_internal)
Definition: objectaccess.h:247
#define ACL_SET
Definition: parsenodes.h:88
@ VAR_SET_DEFAULT
Definition: parsenodes.h:2616
@ VAR_RESET
Definition: parsenodes.h:2619
@ VAR_SET_MULTI
Definition: parsenodes.h:2618
@ VAR_SET_VALUE
Definition: parsenodes.h:2615
@ VAR_SET_CURRENT
Definition: parsenodes.h:2617
@ VAR_RESET_ALL
Definition: parsenodes.h:2620
#define lfirst(lc)
Definition: pg_list.h:172
#define linitial_node(type, l)
Definition: pg_list.h:181
#define list_make1(x1)
Definition: pg_list.h:212
void ImportSnapshot(const char *idstr)
Definition: snapmgr.c:1367
union ValUnion val
Definition: parsenodes.h:362
char * defname
Definition: parsenodes.h:815
Node * arg
Definition: parsenodes.h:816
bool superuser(void)
Definition: superuser.c:46
#define strVal(v)
Definition: value.h:82
void WarnNoTransactionBlock(bool isTopLevel, const char *stmtType)
Definition: xact.c:3656
bool IsInParallelMode(void)
Definition: xact.c:1086

References ACL_SET, generate_unaccent_rules::action, DefElem::arg, DefElem::defname, elog, ereport, errcode(), errmsg(), ERROR, ExtractSetVariableArgs(), GUC_ACTION_LOCAL, GUC_ACTION_SET, ImportSnapshot(), InvokeObjectPostAlterHookArgStr, IsInParallelMode(), lfirst, linitial_node, list_make1, PGC_S_SESSION, PGC_SUSET, PGC_USERSET, ResetAllOptions(), set_config_option(), SetPGVariable(), stmt, strVal, superuser(), A_Const::val, VAR_RESET, VAR_RESET_ALL, VAR_SET_CURRENT, VAR_SET_DEFAULT, VAR_SET_MULTI, VAR_SET_VALUE, and WarnNoTransactionBlock().

Referenced by standard_ProcessUtility().

◆ ExtractSetVariableArgs()

char* ExtractSetVariableArgs ( VariableSetStmt stmt)

Definition at line 167 of file guc_funcs.c.

168 {
169  switch (stmt->kind)
170  {
171  case VAR_SET_VALUE:
172  return flatten_set_variable_args(stmt->name, stmt->args);
173  case VAR_SET_CURRENT:
174  return GetConfigOptionByName(stmt->name, NULL, false);
175  default:
176  return NULL;
177  }
178 }
char * GetConfigOptionByName(const char *name, const char **varname, bool missing_ok)
Definition: guc.c:5385
static char * flatten_set_variable_args(const char *name, List *args)
Definition: guc_funcs.c:192

References flatten_set_variable_args(), GetConfigOptionByName(), stmt, VAR_SET_CURRENT, and VAR_SET_VALUE.

Referenced by AlterSetting(), AlterSystemSetConfigFile(), ExecSetVariableStmt(), and update_proconfig_value().

◆ flatten_set_variable_args()

static char * flatten_set_variable_args ( const char *  name,
List args 
)
static

Definition at line 192 of file guc_funcs.c.

193 {
194  struct config_generic *record;
195  int flags;
197  ListCell *l;
198 
199  /* Fast path if just DEFAULT */
200  if (args == NIL)
201  return NULL;
202 
203  /*
204  * Get flags for the variable; if it's not known, use default flags.
205  * (Caller might throw error later, but not our business to do so here.)
206  */
207  record = find_option(name, false, true, WARNING);
208  if (record)
209  flags = record->flags;
210  else
211  flags = 0;
212 
213  /* Complain if list input and non-list variable */
214  if ((flags & GUC_LIST_INPUT) == 0 &&
215  list_length(args) != 1)
216  ereport(ERROR,
217  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
218  errmsg("SET %s takes only one argument", name)));
219 
221 
222  /*
223  * Each list member may be a plain A_Const node, or an A_Const within a
224  * TypeCast; the latter case is supported only for ConstInterval arguments
225  * (for SET TIME ZONE).
226  */
227  foreach(l, args)
228  {
229  Node *arg = (Node *) lfirst(l);
230  char *val;
231  TypeName *typeName = NULL;
232  A_Const *con;
233 
234  if (l != list_head(args))
235  appendStringInfoString(&buf, ", ");
236 
237  if (IsA(arg, TypeCast))
238  {
239  TypeCast *tc = (TypeCast *) arg;
240 
241  arg = tc->arg;
242  typeName = tc->typeName;
243  }
244 
245  if (!IsA(arg, A_Const))
246  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(arg));
247  con = (A_Const *) arg;
248 
249  switch (nodeTag(&con->val))
250  {
251  case T_Integer:
252  appendStringInfo(&buf, "%d", intVal(&con->val));
253  break;
254  case T_Float:
255  /* represented as a string, so just copy it */
256  appendStringInfoString(&buf, castNode(Float, &con->val)->fval);
257  break;
258  case T_String:
259  val = strVal(&con->val);
260  if (typeName != NULL)
261  {
262  /*
263  * Must be a ConstInterval argument for TIME ZONE. Coerce
264  * to interval and back to normalize the value and account
265  * for any typmod.
266  */
267  Oid typoid;
268  int32 typmod;
269  Datum interval;
270  char *intervalout;
271 
272  typenameTypeIdAndMod(NULL, typeName, &typoid, &typmod);
273  Assert(typoid == INTERVALOID);
274 
275  interval =
279  Int32GetDatum(typmod));
280 
281  intervalout =
283  interval));
284  appendStringInfo(&buf, "INTERVAL '%s'", intervalout);
285  }
286  else
287  {
288  /*
289  * Plain string literal or identifier. For quote mode,
290  * quote it if it's not a vanilla identifier.
291  */
292  if (flags & GUC_LIST_QUOTE)
294  else
296  }
297  break;
298  default:
299  elog(ERROR, "unrecognized node type: %d",
300  (int) nodeTag(&con->val));
301  break;
302  }
303  }
304 
305  return buf.data;
306 }
Datum interval_out(PG_FUNCTION_ARGS)
Definition: timestamp.c:982
Datum interval_in(PG_FUNCTION_ARGS)
Definition: timestamp.c:900
signed int int32
Definition: c.h:494
#define Assert(condition)
Definition: c.h:858
#define WARNING
Definition: elog.h:36
#define DirectFunctionCall1(func, arg1)
Definition: fmgr.h:642
#define DirectFunctionCall3(func, arg1, arg2, arg3)
Definition: fmgr.h:646
struct config_generic * find_option(const char *name, bool create_placeholders, bool skip_errors, int elevel)
Definition: guc.c:1237
#define GUC_LIST_QUOTE
Definition: guc.h:211
#define GUC_LIST_INPUT
Definition: guc.h:210
long val
Definition: informix.c:670
#define IsA(nodeptr, _type_)
Definition: nodes.h:158
#define nodeTag(nodeptr)
Definition: nodes.h:133
#define castNode(_type_, nodeptr)
Definition: nodes.h:176
void typenameTypeIdAndMod(ParseState *pstate, const TypeName *typeName, Oid *typeid_p, int32 *typmod_p)
Definition: parse_type.c:310
void * arg
static int list_length(const List *l)
Definition: pg_list.h:152
#define NIL
Definition: pg_list.h:68
static ListCell * list_head(const List *l)
Definition: pg_list.h:128
static char * buf
Definition: pg_test_fsync.c:73
static char * DatumGetCString(Datum X)
Definition: postgres.h:335
uintptr_t Datum
Definition: postgres.h:64
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
static Datum CStringGetDatum(const char *X)
Definition: postgres.h:350
static Datum Int32GetDatum(int32 X)
Definition: postgres.h:212
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
const char * quote_identifier(const char *ident)
Definition: ruleutils.c:12596
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:97
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:182
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
Definition: value.h:48
Definition: nodes.h:129
TypeName * typeName
Definition: parsenodes.h:374
Node * arg
Definition: parsenodes.h:373
#define intVal(v)
Definition: value.h:79
const char * name

References appendStringInfo(), appendStringInfoString(), arg, TypeCast::arg, generate_unaccent_rules::args, Assert, buf, castNode, CStringGetDatum(), DatumGetCString(), DirectFunctionCall1, DirectFunctionCall3, elog, ereport, errcode(), errmsg(), ERROR, find_option(), config_generic::flags, GUC_LIST_INPUT, GUC_LIST_QUOTE, initStringInfo(), Int32GetDatum(), interval_in(), interval_out(), intVal, InvalidOid, IsA, lfirst, list_head(), list_length(), name, NIL, nodeTag, ObjectIdGetDatum(), quote_identifier(), strVal, TypeCast::typeName, typenameTypeIdAndMod(), A_Const::val, val, and WARNING.

Referenced by ExtractSetVariableArgs(), and SetPGVariable().

◆ GetConfigOptionValues()

static void GetConfigOptionValues ( struct config_generic conf,
const char **  values 
)
static

Definition at line 594 of file guc_funcs.c.

595 {
596  char buffer[256];
597 
598  /* first get the generic attributes */
599 
600  /* name */
601  values[0] = conf->name;
602 
603  /* setting: use ShowGUCOption in order to avoid duplicating the logic */
604  values[1] = ShowGUCOption(conf, false);
605 
606  /* unit, if any (NULL is fine) */
607  values[2] = get_config_unit_name(conf->flags);
608 
609  /* group */
610  values[3] = _(config_group_names[conf->group]);
611 
612  /* short_desc */
613  values[4] = conf->short_desc != NULL ? _(conf->short_desc) : NULL;
614 
615  /* extra_desc */
616  values[5] = conf->long_desc != NULL ? _(conf->long_desc) : NULL;
617 
618  /* context */
619  values[6] = GucContext_Names[conf->context];
620 
621  /* vartype */
622  values[7] = config_type_names[conf->vartype];
623 
624  /* source */
625  values[8] = GucSource_Names[conf->source];
626 
627  /* now get the type specific attributes */
628  switch (conf->vartype)
629  {
630  case PGC_BOOL:
631  {
632  struct config_bool *lconf = (struct config_bool *) conf;
633 
634  /* min_val */
635  values[9] = NULL;
636 
637  /* max_val */
638  values[10] = NULL;
639 
640  /* enumvals */
641  values[11] = NULL;
642 
643  /* boot_val */
644  values[12] = pstrdup(lconf->boot_val ? "on" : "off");
645 
646  /* reset_val */
647  values[13] = pstrdup(lconf->reset_val ? "on" : "off");
648  }
649  break;
650 
651  case PGC_INT:
652  {
653  struct config_int *lconf = (struct config_int *) conf;
654 
655  /* min_val */
656  snprintf(buffer, sizeof(buffer), "%d", lconf->min);
657  values[9] = pstrdup(buffer);
658 
659  /* max_val */
660  snprintf(buffer, sizeof(buffer), "%d", lconf->max);
661  values[10] = pstrdup(buffer);
662 
663  /* enumvals */
664  values[11] = NULL;
665 
666  /* boot_val */
667  snprintf(buffer, sizeof(buffer), "%d", lconf->boot_val);
668  values[12] = pstrdup(buffer);
669 
670  /* reset_val */
671  snprintf(buffer, sizeof(buffer), "%d", lconf->reset_val);
672  values[13] = pstrdup(buffer);
673  }
674  break;
675 
676  case PGC_REAL:
677  {
678  struct config_real *lconf = (struct config_real *) conf;
679 
680  /* min_val */
681  snprintf(buffer, sizeof(buffer), "%g", lconf->min);
682  values[9] = pstrdup(buffer);
683 
684  /* max_val */
685  snprintf(buffer, sizeof(buffer), "%g", lconf->max);
686  values[10] = pstrdup(buffer);
687 
688  /* enumvals */
689  values[11] = NULL;
690 
691  /* boot_val */
692  snprintf(buffer, sizeof(buffer), "%g", lconf->boot_val);
693  values[12] = pstrdup(buffer);
694 
695  /* reset_val */
696  snprintf(buffer, sizeof(buffer), "%g", lconf->reset_val);
697  values[13] = pstrdup(buffer);
698  }
699  break;
700 
701  case PGC_STRING:
702  {
703  struct config_string *lconf = (struct config_string *) conf;
704 
705  /* min_val */
706  values[9] = NULL;
707 
708  /* max_val */
709  values[10] = NULL;
710 
711  /* enumvals */
712  values[11] = NULL;
713 
714  /* boot_val */
715  if (lconf->boot_val == NULL)
716  values[12] = NULL;
717  else
718  values[12] = pstrdup(lconf->boot_val);
719 
720  /* reset_val */
721  if (lconf->reset_val == NULL)
722  values[13] = NULL;
723  else
724  values[13] = pstrdup(lconf->reset_val);
725  }
726  break;
727 
728  case PGC_ENUM:
729  {
730  struct config_enum *lconf = (struct config_enum *) conf;
731 
732  /* min_val */
733  values[9] = NULL;
734 
735  /* max_val */
736  values[10] = NULL;
737 
738  /* enumvals */
739 
740  /*
741  * NOTE! enumvals with double quotes in them are not
742  * supported!
743  */
744  values[11] = config_enum_get_options((struct config_enum *) conf,
745  "{\"", "\"}", "\",\"");
746 
747  /* boot_val */
749  lconf->boot_val));
750 
751  /* reset_val */
753  lconf->reset_val));
754  }
755  break;
756 
757  default:
758  {
759  /*
760  * should never get here, but in case we do, set 'em to NULL
761  */
762 
763  /* min_val */
764  values[9] = NULL;
765 
766  /* max_val */
767  values[10] = NULL;
768 
769  /* enumvals */
770  values[11] = NULL;
771 
772  /* boot_val */
773  values[12] = NULL;
774 
775  /* reset_val */
776  values[13] = NULL;
777  }
778  break;
779  }
780 
781  /*
782  * If the setting came from a config file, set the source location. For
783  * security reasons, we don't show source file/line number for
784  * insufficiently-privileged users.
785  */
786  if (conf->source == PGC_S_FILE &&
787  has_privs_of_role(GetUserId(), ROLE_PG_READ_ALL_SETTINGS))
788  {
789  values[14] = conf->sourcefile;
790  snprintf(buffer, sizeof(buffer), "%d", conf->sourceline);
791  values[15] = pstrdup(buffer);
792  }
793  else
794  {
795  values[14] = NULL;
796  values[15] = NULL;
797  }
798 
799  values[16] = (conf->status & GUC_PENDING_RESTART) ? "t" : "f";
800 }
static Datum values[MAXATTR]
Definition: bootstrap.c:152
#define _(x)
Definition: elog.c:90
const char * config_enum_lookup_by_value(struct config_enum *record, int val)
Definition: guc.c:3025
char * ShowGUCOption(struct config_generic *record, bool use_units)
Definition: guc.c:5418
const char * get_config_unit_name(int flags)
Definition: guc.c:2816
char * config_enum_get_options(struct config_enum *record, const char *prefix, const char *suffix, const char *separator)
Definition: guc.c:3074
@ PGC_S_FILE
Definition: guc.h:112
const char *const GucContext_Names[]
Definition: guc_tables.c:630
const char *const GucSource_Names[]
Definition: guc_tables.c:649
const char *const config_type_names[]
Definition: guc_tables.c:730
const char *const config_group_names[]
Definition: guc_tables.c:673
@ PGC_BOOL
Definition: guc_tables.h:25
@ PGC_STRING
Definition: guc_tables.h:28
@ PGC_ENUM
Definition: guc_tables.h:29
@ PGC_REAL
Definition: guc_tables.h:27
@ PGC_INT
Definition: guc_tables.h:26
#define GUC_PENDING_RESTART
Definition: guc_tables.h:192
char * pstrdup(const char *in)
Definition: mcxt.c:1695
#define snprintf
Definition: port.h:238
bool reset_val
Definition: guc_tables.h:208
bool boot_val
Definition: guc_tables.h:203
enum config_group group
Definition: guc_tables.h:158
GucContext context
Definition: guc_tables.h:157
const char * long_desc
Definition: guc_tables.h:160
const char * name
Definition: guc_tables.h:156
const char * short_desc
Definition: guc_tables.h:159
char * sourcefile
Definition: guc_tables.h:181
enum config_type vartype
Definition: guc_tables.h:163
GucSource source
Definition: guc_tables.h:165
int reset_val
Definition: guc_tables.h:224
int boot_val
Definition: guc_tables.h:217
double boot_val
Definition: guc_tables.h:233
double reset_val
Definition: guc_tables.h:240
double min
Definition: guc_tables.h:234
double max
Definition: guc_tables.h:235
char * reset_val
Definition: guc_tables.h:264
const char * boot_val
Definition: guc_tables.h:259

References _, config_bool::boot_val, config_int::boot_val, config_real::boot_val, config_string::boot_val, config_enum::boot_val, config_enum_get_options(), config_enum_lookup_by_value(), config_group_names, config_type_names, config_generic::context, config_generic::flags, get_config_unit_name(), GetUserId(), config_generic::group, GUC_PENDING_RESTART, GucContext_Names, GucSource_Names, has_privs_of_role(), config_generic::long_desc, config_int::max, config_real::max, config_int::min, config_real::min, config_generic::name, PGC_BOOL, PGC_ENUM, PGC_INT, PGC_REAL, PGC_S_FILE, PGC_STRING, pstrdup(), config_bool::reset_val, config_int::reset_val, config_real::reset_val, config_string::reset_val, config_enum::reset_val, config_generic::short_desc, ShowGUCOption(), snprintf, config_generic::source, config_generic::sourcefile, config_generic::sourceline, config_generic::status, values, and config_generic::vartype.

Referenced by show_all_settings().

◆ GetPGVariable()

void GetPGVariable ( const char *  name,
DestReceiver dest 
)

Definition at line 382 of file guc_funcs.c.

383 {
384  if (guc_name_compare(name, "all") == 0)
386  else
388 }
int guc_name_compare(const char *namea, const char *nameb)
Definition: guc.c:1302
static void ShowGUCConfigOption(const char *name, DestReceiver *dest)
Definition: guc_funcs.c:428
static void ShowAllGUCConfig(DestReceiver *dest)
Definition: guc_funcs.c:456

References generate_unaccent_rules::dest, guc_name_compare(), name, ShowAllGUCConfig(), and ShowGUCConfigOption().

Referenced by exec_replication_command(), and standard_ProcessUtility().

◆ GetPGVariableResultDesc()

TupleDesc GetPGVariableResultDesc ( const char *  name)

Definition at line 394 of file guc_funcs.c.

395 {
396  TupleDesc tupdesc;
397 
398  if (guc_name_compare(name, "all") == 0)
399  {
400  /* need a tuple descriptor representing three TEXT columns */
401  tupdesc = CreateTemplateTupleDesc(3);
402  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
403  TEXTOID, -1, 0);
404  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
405  TEXTOID, -1, 0);
406  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "description",
407  TEXTOID, -1, 0);
408  }
409  else
410  {
411  const char *varname;
412 
413  /* Get the canonical spelling of name */
414  (void) GetConfigOptionByName(name, &varname, false);
415 
416  /* need a tuple descriptor representing a single TEXT column */
417  tupdesc = CreateTemplateTupleDesc(1);
418  TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
419  TEXTOID, -1, 0);
420  }
421  return tupdesc;
422 }
int16 AttrNumber
Definition: attnum.h:21
TupleDesc CreateTemplateTupleDesc(int natts)
Definition: tupdesc.c:67
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:651

References CreateTemplateTupleDesc(), GetConfigOptionByName(), guc_name_compare(), name, and TupleDescInitEntry().

Referenced by UtilityTupleDescriptor().

◆ pg_settings_get_flags()

Datum pg_settings_get_flags ( PG_FUNCTION_ARGS  )

Definition at line 542 of file guc_funcs.c.

543 {
544 #define MAX_GUC_FLAGS 6
545  char *varname = TextDatumGetCString(PG_GETARG_DATUM(0));
546  struct config_generic *record;
547  int cnt = 0;
549  ArrayType *a;
550 
551  record = find_option(varname, false, true, ERROR);
552 
553  /* return NULL if no such variable */
554  if (record == NULL)
555  PG_RETURN_NULL();
556 
557  if (record->flags & GUC_EXPLAIN)
558  flags[cnt++] = CStringGetTextDatum("EXPLAIN");
559  if (record->flags & GUC_NO_RESET)
560  flags[cnt++] = CStringGetTextDatum("NO_RESET");
561  if (record->flags & GUC_NO_RESET_ALL)
562  flags[cnt++] = CStringGetTextDatum("NO_RESET_ALL");
563  if (record->flags & GUC_NO_SHOW_ALL)
564  flags[cnt++] = CStringGetTextDatum("NO_SHOW_ALL");
565  if (record->flags & GUC_NOT_IN_SAMPLE)
566  flags[cnt++] = CStringGetTextDatum("NOT_IN_SAMPLE");
567  if (record->flags & GUC_RUNTIME_COMPUTED)
568  flags[cnt++] = CStringGetTextDatum("RUNTIME_COMPUTED");
569 
570  Assert(cnt <= MAX_GUC_FLAGS);
571 
572  /* Returns the record as Datum */
573  a = construct_array_builtin(flags, cnt, TEXTOID);
575 }
#define PG_RETURN_ARRAYTYPE_P(x)
Definition: array.h:265
ArrayType * construct_array_builtin(Datum *elems, int nelems, Oid elmtype)
Definition: arrayfuncs.c:3374
#define CStringGetTextDatum(s)
Definition: builtins.h:97
#define TextDatumGetCString(d)
Definition: builtins.h:98
#define PG_GETARG_DATUM(n)
Definition: fmgr.h:268
#define PG_RETURN_NULL()
Definition: fmgr.h:345
#define GUC_EXPLAIN
Definition: guc.h:215
#define GUC_NO_RESET_ALL
Definition: guc.h:214
#define GUC_NO_RESET
Definition: guc.h:213
#define GUC_RUNTIME_COMPUTED
Definition: guc.h:225
#define GUC_NO_SHOW_ALL
Definition: guc.h:212
#define GUC_NOT_IN_SAMPLE
Definition: guc.h:217
#define MAX_GUC_FLAGS
int a
Definition: isn.c:69

References a, Assert, construct_array_builtin(), CStringGetTextDatum, ERROR, find_option(), config_generic::flags, GUC_EXPLAIN, GUC_NO_RESET, GUC_NO_RESET_ALL, GUC_NO_SHOW_ALL, GUC_NOT_IN_SAMPLE, GUC_RUNTIME_COMPUTED, MAX_GUC_FLAGS, PG_GETARG_DATUM, PG_RETURN_ARRAYTYPE_P, PG_RETURN_NULL, and TextDatumGetCString.

◆ set_config_by_name()

Datum set_config_by_name ( PG_FUNCTION_ARGS  )

Definition at line 332 of file guc_funcs.c.

333 {
334  char *name;
335  char *value;
336  char *new_value;
337  bool is_local;
338 
339  if (PG_ARGISNULL(0))
340  ereport(ERROR,
341  (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
342  errmsg("SET requires parameter name")));
343 
344  /* Get the GUC variable name */
346 
347  /* Get the desired value or set to NULL for a reset request */
348  if (PG_ARGISNULL(1))
349  value = NULL;
350  else
352 
353  /*
354  * Get the desired state of is_local. Default to false if provided value
355  * is NULL
356  */
357  if (PG_ARGISNULL(2))
358  is_local = false;
359  else
360  is_local = PG_GETARG_BOOL(2);
361 
362  /* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
363  (void) set_config_option(name,
364  value,
367  is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
368  true, 0, false);
369 
370  /* get the new current value */
371  new_value = GetConfigOptionByName(name, NULL, false);
372 
373  /* Convert return string to text */
374  PG_RETURN_TEXT_P(cstring_to_text(new_value));
375 }
#define PG_ARGISNULL(n)
Definition: fmgr.h:209
#define PG_RETURN_TEXT_P(x)
Definition: fmgr.h:372
#define PG_GETARG_BOOL(n)
Definition: fmgr.h:274
static struct @155 value
text * cstring_to_text(const char *s)
Definition: varlena.c:184

References cstring_to_text(), ereport, errcode(), errmsg(), ERROR, GetConfigOptionByName(), GUC_ACTION_LOCAL, GUC_ACTION_SET, name, PG_ARGISNULL, PG_GETARG_BOOL, PG_GETARG_DATUM, PG_RETURN_TEXT_P, PGC_S_SESSION, PGC_SUSET, PGC_USERSET, set_config_option(), superuser(), TextDatumGetCString, and value.

◆ SetPGVariable()

void SetPGVariable ( const char *  name,
List args,
bool  is_local 
)

Definition at line 315 of file guc_funcs.c.

316 {
317  char *argstring = flatten_set_variable_args(name, args);
318 
319  /* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
320  (void) set_config_option(name,
321  argstring,
324  is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
325  true, 0, false);
326 }

References generate_unaccent_rules::args, flatten_set_variable_args(), GUC_ACTION_LOCAL, GUC_ACTION_SET, name, PGC_S_SESSION, PGC_SUSET, PGC_USERSET, set_config_option(), and superuser().

Referenced by DiscardAll(), ExecSetVariableStmt(), and standard_ProcessUtility().

◆ show_all_file_settings()

Datum show_all_file_settings ( PG_FUNCTION_ARGS  )

Definition at line 984 of file guc_funcs.c.

985 {
986 #define NUM_PG_FILE_SETTINGS_ATTS 7
987  ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
988  ConfigVariable *conf;
989  int seqno;
990 
991  /* Scan the config files using current context as workspace */
993 
994  /* Build a tuplestore to return our results in */
995  InitMaterializedSRF(fcinfo, 0);
996 
997  /* Process the results and create a tuplestore */
998  for (seqno = 1; conf != NULL; conf = conf->next, seqno++)
999  {
1001  bool nulls[NUM_PG_FILE_SETTINGS_ATTS];
1002 
1003  memset(values, 0, sizeof(values));
1004  memset(nulls, 0, sizeof(nulls));
1005 
1006  /* sourcefile */
1007  if (conf->filename)
1008  values[0] = PointerGetDatum(cstring_to_text(conf->filename));
1009  else
1010  nulls[0] = true;
1011 
1012  /* sourceline (not meaningful if no sourcefile) */
1013  if (conf->filename)
1014  values[1] = Int32GetDatum(conf->sourceline);
1015  else
1016  nulls[1] = true;
1017 
1018  /* seqno */
1019  values[2] = Int32GetDatum(seqno);
1020 
1021  /* name */
1022  if (conf->name)
1023  values[3] = PointerGetDatum(cstring_to_text(conf->name));
1024  else
1025  nulls[3] = true;
1026 
1027  /* setting */
1028  if (conf->value)
1029  values[4] = PointerGetDatum(cstring_to_text(conf->value));
1030  else
1031  nulls[4] = true;
1032 
1033  /* applied */
1034  values[5] = BoolGetDatum(conf->applied);
1035 
1036  /* error */
1037  if (conf->errmsg)
1038  values[6] = PointerGetDatum(cstring_to_text(conf->errmsg));
1039  else
1040  nulls[6] = true;
1041 
1042  /* shove row into tuplestore */
1043  tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
1044  }
1045 
1046  return (Datum) 0;
1047 }
#define DEBUG3
Definition: elog.h:28
void InitMaterializedSRF(FunctionCallInfo fcinfo, bits32 flags)
Definition: funcapi.c:76
ConfigVariable * ProcessConfigFileInternal(GucContext context, bool applySettings, int elevel)
Definition: guc.c:284
@ PGC_SIGHUP
Definition: guc.h:71
#define NUM_PG_FILE_SETTINGS_ATTS
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:322
static Datum BoolGetDatum(bool X)
Definition: postgres.h:102
TupleDesc setDesc
Definition: execnodes.h:340
Tuplestorestate * setResult
Definition: execnodes.h:339
void tuplestore_putvalues(Tuplestorestate *state, TupleDesc tdesc, const Datum *values, const bool *isnull)
Definition: tuplestore.c:750

References BoolGetDatum(), cstring_to_text(), DEBUG3, InitMaterializedSRF(), Int32GetDatum(), NUM_PG_FILE_SETTINGS_ATTS, PGC_SIGHUP, PointerGetDatum(), ProcessConfigFileInternal(), ReturnSetInfo::setDesc, ReturnSetInfo::setResult, tuplestore_putvalues(), and values.

◆ show_all_settings()

Datum show_all_settings ( PG_FUNCTION_ARGS  )

Definition at line 849 of file guc_funcs.c.

850 {
851  FuncCallContext *funcctx;
852  struct config_generic **guc_vars;
853  int num_vars;
854  TupleDesc tupdesc;
855  int call_cntr;
856  int max_calls;
857  AttInMetadata *attinmeta;
858  MemoryContext oldcontext;
859 
860  /* stuff done only on the first call of the function */
861  if (SRF_IS_FIRSTCALL())
862  {
863  /* create a function context for cross-call persistence */
864  funcctx = SRF_FIRSTCALL_INIT();
865 
866  /*
867  * switch to memory context appropriate for multiple function calls
868  */
869  oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
870 
871  /*
872  * need a tuple descriptor representing NUM_PG_SETTINGS_ATTS columns
873  * of the appropriate types
874  */
876  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
877  TEXTOID, -1, 0);
878  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
879  TEXTOID, -1, 0);
880  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "unit",
881  TEXTOID, -1, 0);
882  TupleDescInitEntry(tupdesc, (AttrNumber) 4, "category",
883  TEXTOID, -1, 0);
884  TupleDescInitEntry(tupdesc, (AttrNumber) 5, "short_desc",
885  TEXTOID, -1, 0);
886  TupleDescInitEntry(tupdesc, (AttrNumber) 6, "extra_desc",
887  TEXTOID, -1, 0);
888  TupleDescInitEntry(tupdesc, (AttrNumber) 7, "context",
889  TEXTOID, -1, 0);
890  TupleDescInitEntry(tupdesc, (AttrNumber) 8, "vartype",
891  TEXTOID, -1, 0);
892  TupleDescInitEntry(tupdesc, (AttrNumber) 9, "source",
893  TEXTOID, -1, 0);
894  TupleDescInitEntry(tupdesc, (AttrNumber) 10, "min_val",
895  TEXTOID, -1, 0);
896  TupleDescInitEntry(tupdesc, (AttrNumber) 11, "max_val",
897  TEXTOID, -1, 0);
898  TupleDescInitEntry(tupdesc, (AttrNumber) 12, "enumvals",
899  TEXTARRAYOID, -1, 0);
900  TupleDescInitEntry(tupdesc, (AttrNumber) 13, "boot_val",
901  TEXTOID, -1, 0);
902  TupleDescInitEntry(tupdesc, (AttrNumber) 14, "reset_val",
903  TEXTOID, -1, 0);
904  TupleDescInitEntry(tupdesc, (AttrNumber) 15, "sourcefile",
905  TEXTOID, -1, 0);
906  TupleDescInitEntry(tupdesc, (AttrNumber) 16, "sourceline",
907  INT4OID, -1, 0);
908  TupleDescInitEntry(tupdesc, (AttrNumber) 17, "pending_restart",
909  BOOLOID, -1, 0);
910 
911  /*
912  * Generate attribute metadata needed later to produce tuples from raw
913  * C strings
914  */
915  attinmeta = TupleDescGetAttInMetadata(tupdesc);
916  funcctx->attinmeta = attinmeta;
917 
918  /* collect the variables, in sorted order */
919  guc_vars = get_guc_variables(&num_vars);
920 
921  /* use user_fctx to remember the array location */
922  funcctx->user_fctx = guc_vars;
923 
924  /* total number of tuples to be returned */
925  funcctx->max_calls = num_vars;
926 
927  MemoryContextSwitchTo(oldcontext);
928  }
929 
930  /* stuff done on every call of the function */
931  funcctx = SRF_PERCALL_SETUP();
932 
933  guc_vars = (struct config_generic **) funcctx->user_fctx;
934  call_cntr = funcctx->call_cntr;
935  max_calls = funcctx->max_calls;
936  attinmeta = funcctx->attinmeta;
937 
938  while (call_cntr < max_calls) /* do when there is more left to send */
939  {
940  struct config_generic *conf = guc_vars[call_cntr];
942  HeapTuple tuple;
943  Datum result;
944 
945  /* skip if marked NO_SHOW_ALL or if not visible to current user */
946  if ((conf->flags & GUC_NO_SHOW_ALL) ||
947  !ConfigOptionIsVisible(conf))
948  {
949  call_cntr = ++funcctx->call_cntr;
950  continue;
951  }
952 
953  /* extract values for the current variable */
954  GetConfigOptionValues(conf, (const char **) values);
955 
956  /* build a tuple */
957  tuple = BuildTupleFromCStrings(attinmeta, values);
958 
959  /* make the tuple into a datum */
960  result = HeapTupleGetDatum(tuple);
961 
962  SRF_RETURN_NEXT(funcctx, result);
963  }
964 
965  /* do when there is no more left */
966  SRF_RETURN_DONE(funcctx);
967 }
HeapTuple BuildTupleFromCStrings(AttInMetadata *attinmeta, char **values)
Definition: execTuples.c:2222
AttInMetadata * TupleDescGetAttInMetadata(TupleDesc tupdesc)
Definition: execTuples.c:2173
#define SRF_IS_FIRSTCALL()
Definition: funcapi.h:304
#define SRF_PERCALL_SETUP()
Definition: funcapi.h:308
#define SRF_RETURN_NEXT(_funcctx, _result)
Definition: funcapi.h:310
#define SRF_FIRSTCALL_INIT()
Definition: funcapi.h:306
static Datum HeapTupleGetDatum(const HeapTupleData *tuple)
Definition: funcapi.h:230
#define SRF_RETURN_DONE(_funcctx)
Definition: funcapi.h:328
struct config_generic ** get_guc_variables(int *num_vars)
Definition: guc.c:874
#define NUM_PG_SETTINGS_ATTS
Definition: guc_funcs.c:846
bool ConfigOptionIsVisible(struct config_generic *conf)
Definition: guc_funcs.c:581
static void GetConfigOptionValues(struct config_generic *conf, const char **values)
Definition: guc_funcs.c:594
while(p+4<=pend)
MemoryContextSwitchTo(old_ctx)
void * user_fctx
Definition: funcapi.h:82
uint64 max_calls
Definition: funcapi.h:74
uint64 call_cntr
Definition: funcapi.h:65
AttInMetadata * attinmeta
Definition: funcapi.h:91
MemoryContext multi_call_memory_ctx
Definition: funcapi.h:101

References FuncCallContext::attinmeta, BuildTupleFromCStrings(), FuncCallContext::call_cntr, ConfigOptionIsVisible(), CreateTemplateTupleDesc(), config_generic::flags, get_guc_variables(), GetConfigOptionValues(), GUC_NO_SHOW_ALL, HeapTupleGetDatum(), FuncCallContext::max_calls, MemoryContextSwitchTo(), FuncCallContext::multi_call_memory_ctx, NUM_PG_SETTINGS_ATTS, SRF_FIRSTCALL_INIT, SRF_IS_FIRSTCALL, SRF_PERCALL_SETUP, SRF_RETURN_DONE, SRF_RETURN_NEXT, TupleDescGetAttInMetadata(), TupleDescInitEntry(), FuncCallContext::user_fctx, values, and while().

◆ show_config_by_name()

Datum show_config_by_name ( PG_FUNCTION_ARGS  )

Definition at line 807 of file guc_funcs.c.

808 {
809  char *varname = TextDatumGetCString(PG_GETARG_DATUM(0));
810  char *varval;
811 
812  /* Get the value */
813  varval = GetConfigOptionByName(varname, NULL, false);
814 
815  /* Convert to text */
817 }

References cstring_to_text(), GetConfigOptionByName(), PG_GETARG_DATUM, PG_RETURN_TEXT_P, and TextDatumGetCString.

◆ show_config_by_name_missing_ok()

Datum show_config_by_name_missing_ok ( PG_FUNCTION_ARGS  )

Definition at line 825 of file guc_funcs.c.

826 {
827  char *varname = TextDatumGetCString(PG_GETARG_DATUM(0));
828  bool missing_ok = PG_GETARG_BOOL(1);
829  char *varval;
830 
831  /* Get the value */
832  varval = GetConfigOptionByName(varname, NULL, missing_ok);
833 
834  /* return NULL if no such variable */
835  if (varval == NULL)
836  PG_RETURN_NULL();
837 
838  /* Convert to text */
840 }

References cstring_to_text(), GetConfigOptionByName(), PG_GETARG_BOOL, PG_GETARG_DATUM, PG_RETURN_NULL, PG_RETURN_TEXT_P, and TextDatumGetCString.

◆ ShowAllGUCConfig()

static void ShowAllGUCConfig ( DestReceiver dest)
static

Definition at line 456 of file guc_funcs.c.

457 {
458  struct config_generic **guc_vars;
459  int num_vars;
460  TupOutputState *tstate;
461  TupleDesc tupdesc;
462  Datum values[3];
463  bool isnull[3] = {false, false, false};
464 
465  /* collect the variables, in sorted order */
466  guc_vars = get_guc_variables(&num_vars);
467 
468  /* need a tuple descriptor representing three TEXT columns */
469  tupdesc = CreateTemplateTupleDesc(3);
470  TupleDescInitBuiltinEntry(tupdesc, (AttrNumber) 1, "name",
471  TEXTOID, -1, 0);
472  TupleDescInitBuiltinEntry(tupdesc, (AttrNumber) 2, "setting",
473  TEXTOID, -1, 0);
474  TupleDescInitBuiltinEntry(tupdesc, (AttrNumber) 3, "description",
475  TEXTOID, -1, 0);
476 
477  /* prepare for projection of tuples */
478  tstate = begin_tup_output_tupdesc(dest, tupdesc, &TTSOpsVirtual);
479 
480  for (int i = 0; i < num_vars; i++)
481  {
482  struct config_generic *conf = guc_vars[i];
483  char *setting;
484 
485  /* skip if marked NO_SHOW_ALL */
486  if (conf->flags & GUC_NO_SHOW_ALL)
487  continue;
488 
489  /* return only options visible to the current user */
490  if (!ConfigOptionIsVisible(conf))
491  continue;
492 
493  /* assign to the values array */
495 
496  setting = ShowGUCOption(conf, true);
497  if (setting)
498  {
499  values[1] = PointerGetDatum(cstring_to_text(setting));
500  isnull[1] = false;
501  }
502  else
503  {
504  values[1] = PointerGetDatum(NULL);
505  isnull[1] = true;
506  }
507 
508  if (conf->short_desc)
509  {
511  isnull[2] = false;
512  }
513  else
514  {
515  values[2] = PointerGetDatum(NULL);
516  isnull[2] = true;
517  }
518 
519  /* send it to dest */
520  do_tup_output(tstate, values, isnull);
521 
522  /* clean up */
524  if (setting)
525  {
526  pfree(setting);
528  }
529  if (conf->short_desc)
531  }
532 
533  end_tup_output(tstate);
534 }
void do_tup_output(TupOutputState *tstate, const Datum *values, const bool *isnull)
Definition: execTuples.c:2362
const TupleTableSlotOps TTSOpsVirtual
Definition: execTuples.c:84
void end_tup_output(TupOutputState *tstate)
Definition: execTuples.c:2420
TupOutputState * begin_tup_output_tupdesc(DestReceiver *dest, TupleDesc tupdesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:2342
int i
Definition: isn.c:73
void pfree(void *pointer)
Definition: mcxt.c:1520
static Pointer DatumGetPointer(Datum X)
Definition: postgres.h:312
void TupleDescInitBuiltinEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:726

References begin_tup_output_tupdesc(), ConfigOptionIsVisible(), CreateTemplateTupleDesc(), cstring_to_text(), DatumGetPointer(), generate_unaccent_rules::dest, do_tup_output(), end_tup_output(), config_generic::flags, get_guc_variables(), GUC_NO_SHOW_ALL, i, config_generic::name, pfree(), PointerGetDatum(), config_generic::short_desc, ShowGUCOption(), TTSOpsVirtual, TupleDescInitBuiltinEntry(), and values.

Referenced by GetPGVariable().

◆ ShowGUCConfigOption()

static void ShowGUCConfigOption ( const char *  name,
DestReceiver dest 
)
static

Definition at line 428 of file guc_funcs.c.

429 {
430  TupOutputState *tstate;
431  TupleDesc tupdesc;
432  const char *varname;
433  char *value;
434 
435  /* Get the value and canonical spelling of name */
436  value = GetConfigOptionByName(name, &varname, false);
437 
438  /* need a tuple descriptor representing a single TEXT column */
439  tupdesc = CreateTemplateTupleDesc(1);
440  TupleDescInitBuiltinEntry(tupdesc, (AttrNumber) 1, varname,
441  TEXTOID, -1, 0);
442 
443  /* prepare for projection of tuples */
444  tstate = begin_tup_output_tupdesc(dest, tupdesc, &TTSOpsVirtual);
445 
446  /* Send it */
447  do_text_output_oneline(tstate, value);
448 
449  end_tup_output(tstate);
450 }
#define do_text_output_oneline(tstate, str_to_emit)
Definition: executor.h:522

References begin_tup_output_tupdesc(), CreateTemplateTupleDesc(), generate_unaccent_rules::dest, do_text_output_oneline, end_tup_output(), GetConfigOptionByName(), name, TTSOpsVirtual, TupleDescInitBuiltinEntry(), and value.

Referenced by GetPGVariable().