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7724cb9935
The recent commit to change copyObject() to use typeof_unqual allows cleaning up some APIs to take advantage of this improved qualifier handling. EventTriggerCollectSimpleCommand() is a good example: It takes a node tree and makes a copy that it keeps around for its internal purposes, but it can't communicate via its function signature that it promises not scribble on the passed node tree. That is now fixed. Reviewed-by: David Geier <geidav.pg@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/92f9750f-c7f6-42d8-9a4a-85a3cbe808f3%40eisentraut.org
122 lines
4.3 KiB
C
122 lines
4.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* rewriteManip.h
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* Querytree manipulation subroutines for query rewriter.
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*
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*
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* Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/rewrite/rewriteManip.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef REWRITEMANIP_H
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#define REWRITEMANIP_H
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#include "nodes/parsenodes.h"
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#include "nodes/pathnodes.h"
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typedef struct AttrMap AttrMap; /* avoid including attmap.h here */
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typedef struct replace_rte_variables_context replace_rte_variables_context;
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typedef Node *(*replace_rte_variables_callback) (const Var *var,
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replace_rte_variables_context *context);
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struct replace_rte_variables_context
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{
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replace_rte_variables_callback callback; /* callback function */
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void *callback_arg; /* context data for callback function */
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int target_varno; /* RTE index to search for */
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int sublevels_up; /* (current) nesting depth */
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bool inserted_sublink; /* have we inserted a SubLink? */
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};
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typedef enum ReplaceVarsNoMatchOption
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{
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REPLACEVARS_REPORT_ERROR, /* throw error if no match */
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REPLACEVARS_CHANGE_VARNO, /* change the Var's varno, nothing else */
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REPLACEVARS_SUBSTITUTE_NULL, /* replace with a NULL Const */
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} ReplaceVarsNoMatchOption;
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typedef struct ChangeVarNodes_context ChangeVarNodes_context;
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typedef bool (*ChangeVarNodes_callback) (Node *node,
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ChangeVarNodes_context *arg);
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struct ChangeVarNodes_context
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{
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int rt_index;
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int new_index;
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int sublevels_up;
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ChangeVarNodes_callback callback;
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};
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extern Relids adjust_relid_set(Relids relids, int oldrelid, int newrelid);
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extern void CombineRangeTables(List **dst_rtable, List **dst_perminfos,
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List *src_rtable, List *src_perminfos);
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extern void OffsetVarNodes(Node *node, int offset, int sublevels_up);
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extern void ChangeVarNodes(Node *node, int rt_index, int new_index,
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int sublevels_up);
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extern void ChangeVarNodesExtended(Node *node, int rt_index, int new_index,
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int sublevels_up,
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ChangeVarNodes_callback callback);
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extern bool ChangeVarNodesWalkExpression(Node *node,
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ChangeVarNodes_context *context);
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extern void IncrementVarSublevelsUp(Node *node, int delta_sublevels_up,
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int min_sublevels_up);
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extern void IncrementVarSublevelsUp_rtable(List *rtable,
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int delta_sublevels_up, int min_sublevels_up);
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extern bool rangeTableEntry_used(Node *node, int rt_index,
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int sublevels_up);
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extern Query *getInsertSelectQuery(Query *parsetree, Query ***subquery_ptr);
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extern void AddQual(Query *parsetree, Node *qual);
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extern void AddInvertedQual(Query *parsetree, Node *qual);
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extern bool contain_aggs_of_level(Node *node, int levelsup);
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extern int locate_agg_of_level(Node *node, int levelsup);
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extern bool contain_windowfuncs(Node *node);
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extern int locate_windowfunc(Node *node);
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extern bool checkExprHasSubLink(Node *node);
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extern Node *add_nulling_relids(Node *node,
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const Bitmapset *target_relids,
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const Bitmapset *added_relids);
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extern Node *remove_nulling_relids(Node *node,
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const Bitmapset *removable_relids,
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const Bitmapset *except_relids);
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extern Node *replace_rte_variables(Node *node,
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int target_varno, int sublevels_up,
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replace_rte_variables_callback callback,
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void *callback_arg,
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bool *outer_hasSubLinks);
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extern Node *replace_rte_variables_mutator(Node *node,
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replace_rte_variables_context *context);
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extern Node *map_variable_attnos(Node *node,
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int target_varno, int sublevels_up,
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const AttrMap *attno_map,
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Oid to_rowtype, bool *found_whole_row);
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extern Node *ReplaceVarFromTargetList(const Var *var,
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RangeTblEntry *target_rte,
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List *targetlist,
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int result_relation,
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ReplaceVarsNoMatchOption nomatch_option,
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int nomatch_varno);
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extern Node *ReplaceVarsFromTargetList(Node *node,
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int target_varno, int sublevels_up,
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RangeTblEntry *target_rte,
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List *targetlist,
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int result_relation,
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ReplaceVarsNoMatchOption nomatch_option,
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int nomatch_varno,
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bool *outer_hasSubLinks);
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#endif /* REWRITEMANIP_H */
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