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/*------------------------------------------------------------------------- * * rewriteManip.h * Querytree manipulation subroutines for query rewriter. * * * Portions Copyright (c) 1996-2012, 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? */ }; 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 bool attribute_used(Node *node, int rt_index, int attno, 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 int locate_windowfunc(Node *node); extern bool checkExprHasAggs(Node *node); extern bool checkExprHasWindowFuncs(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 *ResolveNew(Node *node, int target_varno, int sublevels_up, RangeTblEntry *target_rte, List *targetlist, int event, int update_varno, bool *outer_hasSubLinks); #endif /* REWRITEMANIP_H */