1 /*------------------------------------------------------------------------- 2 * 3 * tlist.h 4 * prototypes for tlist.c. 5 * 6 * 7 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group 8 * Portions Copyright (c) 1994, Regents of the University of California 9 * 10 * src/include/optimizer/tlist.h 11 * 12 *------------------------------------------------------------------------- 13 */ 14 #ifndef TLIST_H 15 #define TLIST_H 16 17 #include "nodes/relation.h" 18 19 20 extern TargetEntry *tlist_member(Node *node, List *targetlist); 21 extern TargetEntry *tlist_member_ignore_relabel(Node *node, List *targetlist); 22 23 extern List *add_to_flat_tlist(List *tlist, List *exprs); 24 25 extern List *get_tlist_exprs(List *tlist, bool includeJunk); 26 27 extern int count_nonjunk_tlist_entries(List *tlist); 28 29 extern bool tlist_same_exprs(List *tlist1, List *tlist2); 30 31 extern bool tlist_same_datatypes(List *tlist, List *colTypes, bool junkOK); 32 extern bool tlist_same_collations(List *tlist, List *colCollations, bool junkOK); 33 34 extern void apply_tlist_labeling(List *dest_tlist, List *src_tlist); 35 36 extern TargetEntry *get_sortgroupref_tle(Index sortref, 37 List *targetList); 38 extern TargetEntry *get_sortgroupclause_tle(SortGroupClause *sgClause, 39 List *targetList); 40 extern Node *get_sortgroupclause_expr(SortGroupClause *sgClause, 41 List *targetList); 42 extern List *get_sortgrouplist_exprs(List *sgClauses, 43 List *targetList); 44 45 extern SortGroupClause *get_sortgroupref_clause(Index sortref, 46 List *clauses); 47 extern SortGroupClause *get_sortgroupref_clause_noerr(Index sortref, 48 List *clauses); 49 50 extern Oid *extract_grouping_ops(List *groupClause); 51 extern AttrNumber *extract_grouping_cols(List *groupClause, List *tlist); 52 extern bool grouping_is_sortable(List *groupClause); 53 extern bool grouping_is_hashable(List *groupClause); 54 55 extern PathTarget *make_pathtarget_from_tlist(List *tlist); 56 extern List *make_tlist_from_pathtarget(PathTarget *target); 57 extern PathTarget *copy_pathtarget(PathTarget *src); 58 extern PathTarget *create_empty_pathtarget(void); 59 extern void add_column_to_pathtarget(PathTarget *target, 60 Expr *expr, Index sortgroupref); 61 extern void add_new_column_to_pathtarget(PathTarget *target, Expr *expr); 62 extern void add_new_columns_to_pathtarget(PathTarget *target, List *exprs); 63 extern void apply_pathtarget_labeling_to_tlist(List *tlist, PathTarget *target); 64 65 /* Convenience macro to get a PathTarget with valid cost/width fields */ 66 #define create_pathtarget(root, tlist) \ 67 set_pathtarget_cost_width(root, make_pathtarget_from_tlist(tlist)) 68 69 #endif /* TLIST_H */ 70