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/*-------------------------------------------------------------------------
*
* parsetree.h--
* Routines to access various components and subcomponents of
* parse trees.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parsetree.h,v 1.3 1997/09/07 04:59:38 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSETREE_H
#define PARSETREE_H /* include once only */
/* ----------------
* need pg_list.h for definitions of CAR(), etc. macros
* ----------------
*/
/* ----------------
* range table macros
*
* parse tree:
* (root targetlist qual)
* ^^^^
* parse root:
* (numlevels cmdtype resrel rangetable priority ruleinfo nestdotinfo)
* ^^^^^^^^^^
* range table:
* (rtentry ...)
*
* rtentry:
* note: this might be wrong, I don't understand how
* rt_time / rt_archive_time work together. anyways it
* looks something like:
*
* (relname ? relid timestuff flags rulelocks)
* or (new/cur relname relid timestuff flags rulelocks)
*
* someone who knows more should correct this -cim 6/9/91
* ----------------
*/
#define rt_relname(rt_entry) \
((!strcmp(((rt_entry)->refname),"*CURRENT*") ||\
!strcmp(((rt_entry)->refname),"*NEW*")) ? ((rt_entry)->refname) : \
((char *)(rt_entry)->relname))
/*
* rt_fetch
* rt_store
*
* Access and (destructively) replace rangetable entries.
*
*/
#define rt_fetch(rangetable_index, rangetable) \
((RangeTblEntry*)nth((rangetable_index)-1, rangetable))
#define rt_store(rangetable_index, rangetable, rt) \
set_nth(rangetable, (rangetable_index)-1, rt)
/*
* getrelid
* getrelname
*
* Given the range index of a relation, return the corresponding
* relation id or relation name.
*/
#define getrelid(rangeindex,rangetable) \
((RangeTblEntry*)nth((rangeindex)-1, rangetable))->relid
#define getrelname(rangeindex, rangetable) \
rt_relname((RangeTblEntry*)nth((rangeindex)-1, rangetable))
#endif /* PARSETREE_H */
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