greenplumn tlist 源码
greenplumn tlist 代码
文件路径：/src/include/optimizer/tlist.h
/*-------------------------------------------------------------------------
*
* tlist.h
* prototypes for tlist.c.
*
*
* Portions Copyright (c) 2007-2009, Greenplum inc
* Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/optimizer/tlist.h
*
*-------------------------------------------------------------------------
*/
#ifndef TLIST_H
#define TLIST_H
#include "nodes/pathnodes.h"
extern TargetEntry *tlist_member(Expr *node, List *targetlist);
extern TargetEntry *tlist_member_ignore_relabel(Expr *node, List *targetlist);
// return a list a target entries that match the node expression
extern List *tlist_members(Node *node, List *targetlist);
extern List *add_to_flat_tlist(List *tlist, List *exprs);
extern List *get_tlist_exprs(List *tlist, bool includeJunk);
extern bool tlist_same_exprs(List *tlist1, List *tlist2);
extern bool tlist_same_datatypes(List *tlist, List *colTypes, bool junkOK);
extern bool tlist_same_collations(List *tlist, List *colCollations, bool junkOK);
extern void apply_tlist_labeling(List *dest_tlist, List *src_tlist);
extern Oid *extract_grouping_ops(List *groupClause);
extern Oid *extract_grouping_collations(List *groupClause, List *tlist);
extern AttrNumber *extract_grouping_cols(List *groupClause, List *tlist);
extern bool grouping_is_sortable(List *groupClause);
extern bool grouping_is_hashable(List *groupClause);
extern void get_sortgroupclauses_tles(List *clauses, List *targetList,
List **tles, List **sortops, List **eqops);
extern Index maxSortGroupRef(List *targetlist, bool include_orderedagg);
extern int get_row_width(List *tlist);
extern PathTarget *make_pathtarget_from_tlist(List *tlist);
extern List *make_tlist_from_pathtarget(PathTarget *target);
extern PathTarget *copy_pathtarget(PathTarget *src);
extern PathTarget *create_empty_pathtarget(void);
extern void add_column_to_pathtarget(PathTarget *target,
Expr *expr, Index sortgroupref);
extern void add_new_column_to_pathtarget(PathTarget *target, Expr *expr);
extern void add_new_columns_to_pathtarget(PathTarget *target, List *exprs);
extern void apply_pathtarget_labeling_to_tlist(List *tlist, PathTarget *target);
extern void split_pathtarget_at_srfs(PlannerInfo *root,
PathTarget *target, PathTarget *input_target,
List **targets, List **targets_contain_srfs);
/* Convenience macro to get a PathTarget with valid cost/width fields */
#define create_pathtarget(root, tlist) \
set_pathtarget_cost_width(root, make_pathtarget_from_tlist(tlist))
#endif /* TLIST_H */
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