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parsetree.h
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1 /*-------------------------------------------------------------------------
2  *
3  * parsetree.h
4  * Routines to access various components and subcomponents of
5  * parse trees.
6  *
7  *
8  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
9  * Portions Copyright (c) 1994, Regents of the University of California
10  *
11  * src/include/parser/parsetree.h
12  *
13  *-------------------------------------------------------------------------
14  */
15 #ifndef PARSETREE_H
16 #define PARSETREE_H
17 
18 #include "nodes/parsenodes.h"
19 
20 
21 /* ----------------
22  * range table operations
23  * ----------------
24  */
25 
26 /*
27  * rt_fetch
28  *
29  * NB: this will crash and burn if handed an out-of-range RT index
30  */
31 #define rt_fetch(rangetable_index, rangetable) \
32  ((RangeTblEntry *) list_nth(rangetable, (rangetable_index)-1))
33 
34 /*
35  * Given an RTE and an attribute number, return the appropriate
36  * variable name or alias for that attribute of that RTE.
37  */
39 
40 /*
41  * Check whether an attribute of an RTE has been dropped
42  */
45 
46 
47 /* ----------------
48  * target list operations
49  * ----------------
50  */
51 
52 extern TargetEntry *get_tle_by_resno(List *tlist, AttrNumber resno);
53 
54 /* ----------------
55  * FOR UPDATE/SHARE info
56  * ----------------
57  */
58 
59 extern RowMarkClause *get_parse_rowmark(Query *qry, Index rtindex);
60 
61 #endif /* PARSETREE_H */
char * get_rte_attribute_name(RangeTblEntry *rte, AttrNumber attnum)
bool get_rte_attribute_is_dropped(RangeTblEntry *rte, AttrNumber attnum)
RowMarkClause * get_parse_rowmark(Query *qry, Index rtindex)
TargetEntry * get_tle_by_resno(List *tlist, AttrNumber resno)
unsigned int Index
Definition: c.h:537
int16 attnum
Definition: pg_attribute.h:79
Definition: pg_list.h:50
int16 AttrNumber
Definition: attnum.h:21