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PREPARE/EXECUTE statements. Patch by Neil Conway, some kibitzing

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from Tom Lane.
This commit is contained in:
Tom Lane
2002-08-27 04:55:12 +00:00
parent bc8f725a4a
commit 28e82066a1
24 changed files with 1512 additions and 55 deletions
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37
src/backend/parser/parser.c
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@ -14,7 +14,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parser.c,v 1.53 2002/06/20 20:29:33 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parser.c,v 1.54 2002/08/27 04:55:11 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -30,6 +30,9 @@
List *parsetree; /* result of parsing is left here */
static Oid *param_type_info; /* state for param_type() */
static int param_count;
static int lookahead_token; /* one-token lookahead */
static bool have_lookahead; /* lookahead_token set? */
@ -50,8 +53,9 @@ parser(StringInfo str, Oid *typev, int nargs)
have_lookahead = false;
scanner_init(str);
parser_init(typev, nargs);
parser_init();
parse_expr_init();
parser_param_set(typev, nargs);
yyresult = yyparse();
@ -65,6 +69,35 @@ parser(StringInfo str, Oid *typev, int nargs)
}
/*
* Save information needed to fill out the type of Param references ($n)
*
* This is used for SQL functions, PREPARE statements, etc. It's split
* out from parser() setup because PREPARE needs to change the info after
* the grammar runs and before parse analysis is done on the preparable
* query.
*/
void
parser_param_set(Oid *typev, int nargs)
{
param_type_info = typev;
param_count = nargs;
}
/*
* param_type()
*
* Fetch a parameter type previously passed to parser_param_set
*/
Oid
param_type(int t)
{
if (t > param_count || t <= 0)
return InvalidOid;
return param_type_info[t - 1];
}
/*
* Intermediate filter between parser and base lexer (base_yylex in scan.l).
*