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- /*-------------------------------------------------------------------------
- *
- * rewriteManip.h
- * Querytree manipulation subroutines for query rewriter.
- *
- *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * src/include/rewrite/rewriteManip.h
- *
- *-------------------------------------------------------------------------
- */
- #ifndef REWRITEMANIP_H
- #define REWRITEMANIP_H
- #include "nodes/parsenodes.h"
- typedef struct replace_rte_variables_context replace_rte_variables_context;
- typedef Node *(*replace_rte_variables_callback) (Var *var,
- replace_rte_variables_context *context);
- struct replace_rte_variables_context
- {
- replace_rte_variables_callback callback; /* callback function */
- void *callback_arg; /* context data for callback function */
- int target_varno; /* RTE index to search for */
- int sublevels_up; /* (current) nesting depth */
- bool inserted_sublink; /* have we inserted a SubLink? */
- };
- typedef enum ReplaceVarsNoMatchOption
- {
- REPLACEVARS_REPORT_ERROR, /* throw error if no match */
- REPLACEVARS_CHANGE_VARNO, /* change the Var's varno, nothing else */
- REPLACEVARS_SUBSTITUTE_NULL /* replace with a NULL Const */
- } ReplaceVarsNoMatchOption;
- extern void OffsetVarNodes(Node *node, int offset, int sublevels_up);
- extern void ChangeVarNodes(Node *node, int old_varno, int new_varno,
- int sublevels_up);
- extern void IncrementVarSublevelsUp(Node *node, int delta_sublevels_up,
- int min_sublevels_up);
- extern void IncrementVarSublevelsUp_rtable(List *rtable,
- int delta_sublevels_up, int min_sublevels_up);
- extern bool rangeTableEntry_used(Node *node, int rt_index,
- int sublevels_up);
- extern Query *getInsertSelectQuery(Query *parsetree, Query ***subquery_ptr);
- extern void AddQual(Query *parsetree, Node *qual);
- extern void AddInvertedQual(Query *parsetree, Node *qual);
- extern bool contain_aggs_of_level(Node *node, int levelsup);
- extern int locate_agg_of_level(Node *node, int levelsup);
- extern bool contain_windowfuncs(Node *node);
- extern int locate_windowfunc(Node *node);
- extern bool checkExprHasSubLink(Node *node);
- extern Node *replace_rte_variables(Node *node,
- int target_varno, int sublevels_up,
- replace_rte_variables_callback callback,
- void *callback_arg,
- bool *outer_hasSubLinks);
- extern Node *replace_rte_variables_mutator(Node *node,
- replace_rte_variables_context *context);
- extern Node *map_variable_attnos(Node *node,
- int target_varno, int sublevels_up,
- const AttrNumber *attno_map, int map_length,
- bool *found_whole_row);
- extern Node *ReplaceVarsFromTargetList(Node *node,
- int target_varno, int sublevels_up,
- RangeTblEntry *target_rte,
- List *targetlist,
- ReplaceVarsNoMatchOption nomatch_option,
- int nomatch_varno,
- bool *outer_hasSubLinks);
- #endif /* REWRITEMANIP_H */
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