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paramassign.h File Reference
#include "nodes/pathnodes.h"
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Functions

Paramreplace_outer_var (PlannerInfo *root, Var *var)
 
Paramreplace_outer_placeholdervar (PlannerInfo *root, PlaceHolderVar *phv)
 
Paramreplace_outer_agg (PlannerInfo *root, Aggref *agg)
 
Paramreplace_outer_grouping (PlannerInfo *root, GroupingFunc *grp)
 
Paramreplace_nestloop_param_var (PlannerInfo *root, Var *var)
 
Paramreplace_nestloop_param_placeholdervar (PlannerInfo *root, PlaceHolderVar *phv)
 
void process_subquery_nestloop_params (PlannerInfo *root, List *subplan_params)
 
Listidentify_current_nestloop_params (PlannerInfo *root, Relids leftrelids)
 
Paramgenerate_new_exec_param (PlannerInfo *root, Oid paramtype, int32 paramtypmod, Oid paramcollation)
 
int assign_special_exec_param (PlannerInfo *root)
 

Function Documentation

◆ assign_special_exec_param()

int assign_special_exec_param ( PlannerInfo root)

Definition at line 612 of file paramassign.c.

613 {
614  int paramId = list_length(root->glob->paramExecTypes);
615 
617  InvalidOid);
618  return paramId;
619 }
List * lappend_oid(List *list, Oid datum)
Definition: list.c:374
static int list_length(const List *l)
Definition: pg_list.h:152
#define InvalidOid
Definition: postgres_ext.h:36
List * paramExecTypes
Definition: pathnodes.h:135
PlannerGlobal * glob
Definition: pathnodes.h:202

References PlannerInfo::glob, InvalidOid, lappend_oid(), list_length(), and PlannerGlobal::paramExecTypes.

Referenced by create_gather_merge_plan(), create_gather_plan(), grouping_planner(), SS_process_ctes(), and subquery_planner().

◆ generate_new_exec_param()

Param* generate_new_exec_param ( PlannerInfo root,
Oid  paramtype,
int32  paramtypmod,
Oid  paramcollation 
)

Definition at line 585 of file paramassign.c.

587 {
588  Param *retval;
589 
590  retval = makeNode(Param);
591  retval->paramkind = PARAM_EXEC;
592  retval->paramid = list_length(root->glob->paramExecTypes);
594  paramtype);
595  retval->paramtype = paramtype;
596  retval->paramtypmod = paramtypmod;
597  retval->paramcollid = paramcollation;
598  retval->location = -1;
599 
600  return retval;
601 }
#define makeNode(_type_)
Definition: nodes.h:176
@ PARAM_EXEC
Definition: primnodes.h:354
int paramid
Definition: primnodes.h:363
Oid paramtype
Definition: primnodes.h:364
ParamKind paramkind
Definition: primnodes.h:362
int location
Definition: primnodes.h:370

References PlannerInfo::glob, lappend_oid(), list_length(), Param::location, makeNode, PARAM_EXEC, PlannerGlobal::paramExecTypes, Param::paramid, Param::paramkind, and Param::paramtype.

Referenced by build_subplan(), convert_EXISTS_to_ANY(), generate_subquery_params(), replace_nestloop_param_placeholdervar(), replace_nestloop_param_var(), and SS_make_initplan_output_param().

◆ identify_current_nestloop_params()

List* identify_current_nestloop_params ( PlannerInfo root,
Relids  leftrelids 
)

Definition at line 530 of file paramassign.c.

531 {
532  List *result;
533  ListCell *cell;
534 
535  result = NIL;
536  foreach(cell, root->curOuterParams)
537  {
538  NestLoopParam *nlp = (NestLoopParam *) lfirst(cell);
539 
540  /*
541  * We are looking for Vars and PHVs that can be supplied by the
542  * lefthand rels. When we find one, it's okay to modify it in-place
543  * because all the routines above make a fresh copy to put into
544  * curOuterParams.
545  */
546  if (IsA(nlp->paramval, Var) &&
547  bms_is_member(nlp->paramval->varno, leftrelids))
548  {
549  Var *var = (Var *) nlp->paramval;
550 
552  cell);
553  var->varnullingrels = bms_intersect(var->varnullingrels,
554  leftrelids);
555  result = lappend(result, nlp);
556  }
557  else if (IsA(nlp->paramval, PlaceHolderVar) &&
560  leftrelids))
561  {
562  PlaceHolderVar *phv = (PlaceHolderVar *) nlp->paramval;
563 
565  cell);
567  leftrelids);
568  result = lappend(result, nlp);
569  }
570  }
571  return result;
572 }
bool bms_is_subset(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:363
bool bms_is_member(int x, const Bitmapset *a)
Definition: bitmapset.c:460
Bitmapset * bms_intersect(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:248
List * lappend(List *list, void *datum)
Definition: list.c:338
#define IsA(nodeptr, _type_)
Definition: nodes.h:179
#define lfirst(lc)
Definition: pg_list.h:172
#define NIL
Definition: pg_list.h:68
#define foreach_delete_current(lst, cell)
Definition: pg_list.h:390
PlaceHolderInfo * find_placeholder_info(PlannerInfo *root, PlaceHolderVar *phv)
Definition: placeholder.c:83
Definition: pg_list.h:54
Var * paramval
Definition: plannodes.h:817
Relids ph_eval_at
Definition: pathnodes.h:3047
Relids phnullingrels
Definition: pathnodes.h:2753
List * curOuterParams
Definition: pathnodes.h:531
Definition: primnodes.h:234
int varno
Definition: primnodes.h:241

References bms_intersect(), bms_is_member(), bms_is_subset(), PlannerInfo::curOuterParams, find_placeholder_info(), foreach_delete_current, IsA, lappend(), lfirst, NIL, NestLoopParam::paramval, PlaceHolderInfo::ph_eval_at, PlaceHolderVar::phnullingrels, and Var::varno.

Referenced by create_nestloop_plan().

◆ process_subquery_nestloop_params()

void process_subquery_nestloop_params ( PlannerInfo root,
List subplan_params 
)

Definition at line 428 of file paramassign.c.

429 {
430  ListCell *lc;
431 
432  foreach(lc, subplan_params)
433  {
435 
436  if (IsA(pitem->item, Var))
437  {
438  Var *var = (Var *) pitem->item;
439  NestLoopParam *nlp;
440  ListCell *lc2;
441 
442  /* If not from a nestloop outer rel, complain */
443  if (!bms_is_member(var->varno, root->curOuterRels))
444  elog(ERROR, "non-LATERAL parameter required by subquery");
445 
446  /* Is this param already listed in root->curOuterParams? */
447  foreach(lc2, root->curOuterParams)
448  {
449  nlp = (NestLoopParam *) lfirst(lc2);
450  if (nlp->paramno == pitem->paramId)
451  {
452  Assert(equal(var, nlp->paramval));
453  /* Present, so nothing to do */
454  break;
455  }
456  }
457  if (lc2 == NULL)
458  {
459  /* No, so add it */
460  nlp = makeNode(NestLoopParam);
461  nlp->paramno = pitem->paramId;
462  nlp->paramval = copyObject(var);
463  root->curOuterParams = lappend(root->curOuterParams, nlp);
464  }
465  }
466  else if (IsA(pitem->item, PlaceHolderVar))
467  {
468  PlaceHolderVar *phv = (PlaceHolderVar *) pitem->item;
469  NestLoopParam *nlp;
470  ListCell *lc2;
471 
472  /* If not from a nestloop outer rel, complain */
473  if (!bms_is_subset(find_placeholder_info(root, phv)->ph_eval_at,
474  root->curOuterRels))
475  elog(ERROR, "non-LATERAL parameter required by subquery");
476 
477  /* Is this param already listed in root->curOuterParams? */
478  foreach(lc2, root->curOuterParams)
479  {
480  nlp = (NestLoopParam *) lfirst(lc2);
481  if (nlp->paramno == pitem->paramId)
482  {
483  Assert(equal(phv, nlp->paramval));
484  /* Present, so nothing to do */
485  break;
486  }
487  }
488  if (lc2 == NULL)
489  {
490  /* No, so add it */
491  nlp = makeNode(NestLoopParam);
492  nlp->paramno = pitem->paramId;
493  nlp->paramval = (Var *) copyObject(phv);
494  root->curOuterParams = lappend(root->curOuterParams, nlp);
495  }
496  }
497  else
498  elog(ERROR, "unexpected type of subquery parameter");
499  }
500 }
#define ERROR
Definition: elog.h:39
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:223
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:77
Assert(fmt[strlen(fmt) - 1] !='\n')
#define copyObject(obj)
Definition: nodes.h:244
#define lfirst_node(type, lc)
Definition: pg_list.h:176
Relids curOuterRels
Definition: pathnodes.h:529

References Assert(), bms_is_member(), bms_is_subset(), copyObject, PlannerInfo::curOuterParams, PlannerInfo::curOuterRels, elog(), equal(), ERROR, find_placeholder_info(), if(), IsA, PlannerParamItem::item, lappend(), lfirst, lfirst_node, makeNode, PlannerParamItem::paramId, and Var::varno.

Referenced by create_subqueryscan_plan().

◆ replace_nestloop_param_placeholdervar()

Param* replace_nestloop_param_placeholdervar ( PlannerInfo root,
PlaceHolderVar phv 
)

Definition at line 364 of file paramassign.c.

365 {
366  Param *param;
367  NestLoopParam *nlp;
368  ListCell *lc;
369 
370  /* Is this PHV already listed in root->curOuterParams? */
371  foreach(lc, root->curOuterParams)
372  {
373  nlp = (NestLoopParam *) lfirst(lc);
374  if (equal(phv, nlp->paramval))
375  {
376  /* Yes, so just make a Param referencing this NLP's slot */
377  param = makeNode(Param);
378  param->paramkind = PARAM_EXEC;
379  param->paramid = nlp->paramno;
380  param->paramtype = exprType((Node *) phv->phexpr);
381  param->paramtypmod = exprTypmod((Node *) phv->phexpr);
382  param->paramcollid = exprCollation((Node *) phv->phexpr);
383  param->location = -1;
384  return param;
385  }
386  }
387 
388  /* No, so assign a PARAM_EXEC slot for a new NLP */
389  param = generate_new_exec_param(root,
390  exprType((Node *) phv->phexpr),
391  exprTypmod((Node *) phv->phexpr),
392  exprCollation((Node *) phv->phexpr));
393 
394  /* Add it to the list of required NLPs */
395  nlp = makeNode(NestLoopParam);
396  nlp->paramno = param->paramid;
397  nlp->paramval = (Var *) copyObject(phv);
398  root->curOuterParams = lappend(root->curOuterParams, nlp);
399 
400  /* And return the replacement Param */
401  return param;
402 }
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:43
int32 exprTypmod(const Node *expr)
Definition: nodeFuncs.c:282
Oid exprCollation(const Node *expr)
Definition: nodeFuncs.c:786
Param * generate_new_exec_param(PlannerInfo *root, Oid paramtype, int32 paramtypmod, Oid paramcollation)
Definition: paramassign.c:585
Definition: nodes.h:129

References copyObject, PlannerInfo::curOuterParams, equal(), exprCollation(), exprType(), exprTypmod(), generate_new_exec_param(), lappend(), lfirst, Param::location, makeNode, PARAM_EXEC, Param::paramid, Param::paramkind, NestLoopParam::paramno, Param::paramtype, and NestLoopParam::paramval.

Referenced by replace_nestloop_params_mutator().

◆ replace_nestloop_param_var()

Param* replace_nestloop_param_var ( PlannerInfo root,
Var var 
)

Definition at line 315 of file paramassign.c.

316 {
317  Param *param;
318  NestLoopParam *nlp;
319  ListCell *lc;
320 
321  /* Is this Var already listed in root->curOuterParams? */
322  foreach(lc, root->curOuterParams)
323  {
324  nlp = (NestLoopParam *) lfirst(lc);
325  if (equal(var, nlp->paramval))
326  {
327  /* Yes, so just make a Param referencing this NLP's slot */
328  param = makeNode(Param);
329  param->paramkind = PARAM_EXEC;
330  param->paramid = nlp->paramno;
331  param->paramtype = var->vartype;
332  param->paramtypmod = var->vartypmod;
333  param->paramcollid = var->varcollid;
334  param->location = var->location;
335  return param;
336  }
337  }
338 
339  /* No, so assign a PARAM_EXEC slot for a new NLP */
340  param = generate_new_exec_param(root,
341  var->vartype,
342  var->vartypmod,
343  var->varcollid);
344  param->location = var->location;
345 
346  /* Add it to the list of required NLPs */
347  nlp = makeNode(NestLoopParam);
348  nlp->paramno = param->paramid;
349  nlp->paramval = copyObject(var);
350  root->curOuterParams = lappend(root->curOuterParams, nlp);
351 
352  /* And return the replacement Param */
353  return param;
354 }
int location
Definition: primnodes.h:279

References copyObject, PlannerInfo::curOuterParams, equal(), generate_new_exec_param(), lappend(), lfirst, Var::location, Param::location, makeNode, PARAM_EXEC, Param::paramid, Param::paramkind, NestLoopParam::paramno, Param::paramtype, and NestLoopParam::paramval.

Referenced by replace_nestloop_params_mutator().

◆ replace_outer_agg()

Param* replace_outer_agg ( PlannerInfo root,
Aggref agg 
)

Definition at line 223 of file paramassign.c.

224 {
225  Param *retval;
226  PlannerParamItem *pitem;
227  Index levelsup;
228 
229  Assert(agg->agglevelsup > 0 && agg->agglevelsup < root->query_level);
230 
231  /* Find the query level the Aggref belongs to */
232  for (levelsup = agg->agglevelsup; levelsup > 0; levelsup--)
233  root = root->parent_root;
234 
235  /*
236  * It does not seem worthwhile to try to de-duplicate references to outer
237  * aggs. Just make a new slot every time.
238  */
239  agg = copyObject(agg);
240  IncrementVarSublevelsUp((Node *) agg, -((int) agg->agglevelsup), 0);
241  Assert(agg->agglevelsup == 0);
242 
243  pitem = makeNode(PlannerParamItem);
244  pitem->item = (Node *) agg;
245  pitem->paramId = list_length(root->glob->paramExecTypes);
247  agg->aggtype);
248 
249  root->plan_params = lappend(root->plan_params, pitem);
250 
251  retval = makeNode(Param);
252  retval->paramkind = PARAM_EXEC;
253  retval->paramid = pitem->paramId;
254  retval->paramtype = agg->aggtype;
255  retval->paramtypmod = -1;
256  retval->paramcollid = agg->aggcollid;
257  retval->location = agg->location;
258 
259  return retval;
260 }
unsigned int Index
Definition: c.h:603
void IncrementVarSublevelsUp(Node *node, int delta_sublevels_up, int min_sublevels_up)
Definition: rewriteManip.c:841
Index query_level
Definition: pathnodes.h:205
List * plan_params
Definition: pathnodes.h:217

References Assert(), copyObject, PlannerInfo::glob, IncrementVarSublevelsUp(), PlannerParamItem::item, lappend(), lappend_oid(), list_length(), Param::location, Aggref::location, makeNode, PARAM_EXEC, PlannerGlobal::paramExecTypes, PlannerParamItem::paramId, Param::paramid, Param::paramkind, Param::paramtype, PlannerInfo::plan_params, and PlannerInfo::query_level.

Referenced by replace_correlation_vars_mutator().

◆ replace_outer_grouping()

Param* replace_outer_grouping ( PlannerInfo root,
GroupingFunc grp 
)

Definition at line 269 of file paramassign.c.

270 {
271  Param *retval;
272  PlannerParamItem *pitem;
273  Index levelsup;
274  Oid ptype = exprType((Node *) grp);
275 
276  Assert(grp->agglevelsup > 0 && grp->agglevelsup < root->query_level);
277 
278  /* Find the query level the GroupingFunc belongs to */
279  for (levelsup = grp->agglevelsup; levelsup > 0; levelsup--)
280  root = root->parent_root;
281 
282  /*
283  * It does not seem worthwhile to try to de-duplicate references to outer
284  * aggs. Just make a new slot every time.
285  */
286  grp = copyObject(grp);
287  IncrementVarSublevelsUp((Node *) grp, -((int) grp->agglevelsup), 0);
288  Assert(grp->agglevelsup == 0);
289 
290  pitem = makeNode(PlannerParamItem);
291  pitem->item = (Node *) grp;
292  pitem->paramId = list_length(root->glob->paramExecTypes);
294  ptype);
295 
296  root->plan_params = lappend(root->plan_params, pitem);
297 
298  retval = makeNode(Param);
299  retval->paramkind = PARAM_EXEC;
300  retval->paramid = pitem->paramId;
301  retval->paramtype = ptype;
302  retval->paramtypmod = -1;
303  retval->paramcollid = InvalidOid;
304  retval->location = grp->location;
305 
306  return retval;
307 }
unsigned int Oid
Definition: postgres_ext.h:31
Index agglevelsup
Definition: primnodes.h:537

References GroupingFunc::agglevelsup, Assert(), copyObject, exprType(), PlannerInfo::glob, IncrementVarSublevelsUp(), InvalidOid, PlannerParamItem::item, lappend(), lappend_oid(), list_length(), Param::location, GroupingFunc::location, makeNode, PARAM_EXEC, PlannerGlobal::paramExecTypes, PlannerParamItem::paramId, Param::paramid, Param::paramkind, Param::paramtype, PlannerInfo::plan_params, and PlannerInfo::query_level.

Referenced by replace_correlation_vars_mutator().

◆ replace_outer_placeholdervar()

Param* replace_outer_placeholdervar ( PlannerInfo root,
PlaceHolderVar phv 
)

Definition at line 196 of file paramassign.c.

197 {
198  Param *retval;
199  int i;
200 
201  Assert(phv->phlevelsup > 0 && phv->phlevelsup < root->query_level);
202 
203  /* Find the PHV in the appropriate plan_params, or add it if not present */
204  i = assign_param_for_placeholdervar(root, phv);
205 
206  retval = makeNode(Param);
207  retval->paramkind = PARAM_EXEC;
208  retval->paramid = i;
209  retval->paramtype = exprType((Node *) phv->phexpr);
210  retval->paramtypmod = exprTypmod((Node *) phv->phexpr);
211  retval->paramcollid = exprCollation((Node *) phv->phexpr);
212  retval->location = -1;
213 
214  return retval;
215 }
int i
Definition: isn.c:73
static int assign_param_for_placeholdervar(PlannerInfo *root, PlaceHolderVar *phv)
Definition: paramassign.c:148
Index phlevelsup
Definition: pathnodes.h:2759

References Assert(), assign_param_for_placeholdervar(), exprCollation(), exprType(), exprTypmod(), i, Param::location, makeNode, PARAM_EXEC, Param::paramid, Param::paramkind, Param::paramtype, PlaceHolderVar::phlevelsup, and PlannerInfo::query_level.

Referenced by replace_correlation_vars_mutator().

◆ replace_outer_var()

Param* replace_outer_var ( PlannerInfo root,
Var var 
)

Definition at line 119 of file paramassign.c.

120 {
121  Param *retval;
122  int i;
123 
124  Assert(var->varlevelsup > 0 && var->varlevelsup < root->query_level);
125 
126  /* Find the Var in the appropriate plan_params, or add it if not present */
127  i = assign_param_for_var(root, var);
128 
129  retval = makeNode(Param);
130  retval->paramkind = PARAM_EXEC;
131  retval->paramid = i;
132  retval->paramtype = var->vartype;
133  retval->paramtypmod = var->vartypmod;
134  retval->paramcollid = var->varcollid;
135  retval->location = var->location;
136 
137  return retval;
138 }
static int assign_param_for_var(PlannerInfo *root, Var *var)
Definition: paramassign.c:66
Index varlevelsup
Definition: primnodes.h:266

References Assert(), assign_param_for_var(), i, Var::location, Param::location, makeNode, PARAM_EXEC, Param::paramid, Param::paramkind, Param::paramtype, PlannerInfo::query_level, and Var::varlevelsup.

Referenced by replace_correlation_vars_mutator().