#include "nodes/relation.h"

Include dependency graph for var.h:

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Enumerations
enum	PVCAggregateBehavior { PVC_REJECT_AGGREGATES, PVC_INCLUDE_AGGREGATES, PVC_RECURSE_AGGREGATES }
enum	PVCPlaceHolderBehavior { PVC_REJECT_PLACEHOLDERS, PVC_INCLUDE_PLACEHOLDERS, PVC_RECURSE_PLACEHOLDERS }
Functions
Relids	pull_varnos (Node *node)
Relids	pull_varnos_of_level (Node *node, int levelsup)
void	pull_varattnos (Node node, Index varno, Bitmapset *varattnos)
List *	pull_vars_of_level (Node *node, int levelsup)
bool	contain_var_clause (Node *node)
bool	contain_vars_of_level (Node *node, int levelsup)
int	locate_var_of_level (Node *node, int levelsup)
List *	pull_var_clause (Node *node, PVCAggregateBehavior aggbehavior, PVCPlaceHolderBehavior phbehavior)
Node *	flatten_join_alias_vars (PlannerInfo root, Node node)

Enumeration Type Documentation

enum PVCAggregateBehavior

Enumerator:

PVC_REJECT_AGGREGATES
PVC_INCLUDE_AGGREGATES
PVC_RECURSE_AGGREGATES

Definition at line 19 of file var.h.

{
    PVC_REJECT_AGGREGATES,      /* throw error if Aggref found */
    PVC_INCLUDE_AGGREGATES,     /* include Aggrefs in output list */
    PVC_RECURSE_AGGREGATES      /* recurse into Aggref arguments */
} PVCAggregateBehavior;

enum PVCPlaceHolderBehavior

Enumerator:

PVC_REJECT_PLACEHOLDERS
PVC_INCLUDE_PLACEHOLDERS
PVC_RECURSE_PLACEHOLDERS

Definition at line 26 of file var.h.

{
    PVC_REJECT_PLACEHOLDERS,    /* throw error if PlaceHolderVar found */
    PVC_INCLUDE_PLACEHOLDERS,   /* include PlaceHolderVars in output list */
    PVC_RECURSE_PLACEHOLDERS    /* recurse into PlaceHolderVar arguments */
} PVCPlaceHolderBehavior;

Function Documentation

bool contain_var_clause ( Node * node )

Definition at line 324 of file var.c.

References contain_var_clause_walker(), and NULL.

Referenced by cookDefault(), domainAddConstraint(), examine_parameter_list(), is_pseudo_constant_clause(), and match_clause_to_ordering_op().

{
    return contain_var_clause_walker(node, NULL);
}

bool contain_vars_of_level	(	Node *	node,
		int	levelsup
	)

Definition at line 362 of file var.c.

References contain_vars_of_level_walker(), and query_or_expression_tree_walker().

Referenced by checkExprIsVarFree(), convert_ANY_sublink_to_join(), convert_EXISTS_sublink_to_join(), convert_EXISTS_to_ANY(), make_restrictinfos_from_actual_clauses(), pullup_replace_vars_callback(), transformAExprIn(), transformRangeFunction(), transformSetOperationTree(), and transformValuesClause().

{
    int         sublevels_up = levelsup;

    return query_or_expression_tree_walker(node,
                                           contain_vars_of_level_walker,
                                           (void *) &sublevels_up,
                                           0);
}

Node* flatten_join_alias_vars	(	PlannerInfo *	root,
		Node *	node
	)

Definition at line 608 of file var.c.

References flatten_join_alias_vars_mutator(), Query::hasSubLinks, flatten_join_alias_vars_context::inserted_sublink, PlannerInfo::parse, flatten_join_alias_vars_context::possible_sublink, flatten_join_alias_vars_context::root, and flatten_join_alias_vars_context::sublevels_up.

Referenced by parseCheckAggregates(), preprocess_expression(), and subquery_planner().

{
    flatten_join_alias_vars_context context;

    context.root = root;
    context.sublevels_up = 0;
    /* flag whether join aliases could possibly contain SubLinks */
    context.possible_sublink = root->parse->hasSubLinks;
    /* if hasSubLinks is already true, no need to work hard */
    context.inserted_sublink = root->parse->hasSubLinks;

    return flatten_join_alias_vars_mutator(node, &context);
}

int locate_var_of_level	(	Node *	node,
		int	levelsup
	)

Definition at line 430 of file var.c.

References locate_var_of_level_walker(), query_or_expression_tree_walker(), locate_var_of_level_context::sublevels_up, and locate_var_of_level_context::var_location.

Referenced by checkExprIsVarFree(), and transformSetOperationTree().

{
    locate_var_of_level_context context;

    context.var_location = -1;  /* in case we find nothing */
    context.sublevels_up = levelsup;

    (void) query_or_expression_tree_walker(node,
                                           locate_var_of_level_walker,
                                           (void *) &context,
                                           0);

    return context.var_location;
}

List* pull_var_clause	(	Node *	node,
		PVCAggregateBehavior	aggbehavior,
		PVCPlaceHolderBehavior	phbehavior
	)

Definition at line 516 of file var.c.

References pull_var_clause_context::aggbehavior, pull_var_clause_context::phbehavior, pull_var_clause_walker(), and pull_var_clause_context::varlist.

Referenced by AddRelationNewConstraints(), build_base_rel_tlists(), CreateTrigger(), distribute_qual_to_rels(), estimate_num_groups(), fix_placeholder_input_needed_levels(), flatten_tlist(), generate_base_implied_equalities_no_const(), make_subplanTargetList(), make_windowInputTargetList(), mark_placeholders_in_expr(), prepare_sort_from_pathkeys(), preprocess_targetlist(), qual_is_pushdown_safe(), and StoreRelCheck().

{
    pull_var_clause_context context;

    context.varlist = NIL;
    context.aggbehavior = aggbehavior;
    context.phbehavior = phbehavior;

    pull_var_clause_walker(node, &context);
    return context.varlist;
}

void pull_varattnos	(	Node *	node,
		Index	varno,
		Bitmapset **	varattnos
	)

Definition at line 212 of file var.c.

References pull_varattnos_walker(), pull_varattnos_context::varattnos, and pull_varattnos_context::varno.

Referenced by check_index_only(), check_selective_binary_conversion(), deparseReturningList(), postgresGetForeignRelSize(), and RelationGetIndexAttrBitmap().

{
    pull_varattnos_context context;

    context.varattnos = *varattnos;
    context.varno = varno;

    (void) pull_varattnos_walker(node, &context);

    *varattnos = context.varattnos;
}

Relids pull_varnos ( Node * node )

Definition at line 96 of file var.c.

References pull_varnos_walker(), query_or_expression_tree_walker(), pull_varnos_context::sublevels_up, and pull_varnos_context::varnos.

Referenced by adjust_rowcompare_for_index(), convert_ANY_sublink_to_join(), convert_EXISTS_sublink_to_join(), create_unique_path(), distribute_qual_to_rels(), examine_variable(), find_placeholder_info(), get_eclass_for_sort_expr(), join_is_removable(), make_outerjoininfo(), make_restrictinfo_internal(), match_clause_to_indexcol(), match_rowcompare_to_indexcol(), NumRelids(), and reduce_outer_joins_pass2().

{
    pull_varnos_context context;

    context.varnos = NULL;
    context.sublevels_up = 0;

    /*
     * Must be prepared to start with a Query or a bare expression tree; if
     * it's a Query, we don't want to increment sublevels_up.
     */
    query_or_expression_tree_walker(node,
                                    pull_varnos_walker,
                                    (void *) &context,
                                    0);

    return context.varnos;
}

Relids pull_varnos_of_level	(	Node *	node,
		int	levelsup
	)

Definition at line 121 of file var.c.

References pull_varnos_walker(), query_or_expression_tree_walker(), pull_varnos_context::sublevels_up, and pull_varnos_context::varnos.

Referenced by is_simple_subquery().

{
    pull_varnos_context context;

    context.varnos = NULL;
    context.sublevels_up = levelsup;

    /*
     * Must be prepared to start with a Query or a bare expression tree; if
     * it's a Query, we don't want to increment sublevels_up.
     */
    query_or_expression_tree_walker(node,
                                    pull_varnos_walker,
                                    (void *) &context,
                                    0);

    return context.varnos;
}

List* pull_vars_of_level	(	Node *	node,
		int	levelsup
	)

Definition at line 256 of file var.c.

References pull_vars_walker(), query_or_expression_tree_walker(), pull_vars_context::sublevels_up, and pull_vars_context::vars.

Referenced by extract_lateral_references().

{
    pull_vars_context context;

    context.vars = NIL;
    context.sublevels_up = levelsup;

    /*
     * Must be prepared to start with a Query or a bare expression tree; if
     * it's a Query, we don't want to increment sublevels_up.
     */
    query_or_expression_tree_walker(node,
                                    pull_vars_walker,
                                    (void *) &context,
                                    0);

    return context.vars;
}

Header And Logo

var.h File Reference

Enumerations

Functions

Enumeration Type Documentation

Function Documentation