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Rip out QueryTreeList structure, root and branch. Querytree

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lists are now plain old garden-variety Lists, allocated with palloc,
rather than specialized expansible-array data allocated with malloc.
This substantially simplifies their handling and eliminates several
sources of memory leakage.
Several basic types of erroneous queries (syntax error, attempt to
insert a duplicate key into a unique index) now demonstrably leak
zero bytes per query.
This commit is contained in:
Tom Lane
1999-05-13 07:29:22 +00:00
parent f80642137c
commit 507a0a2ab0
18 changed files with 192 additions and 288 deletions
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24
src/backend/parser/parser.c
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@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parser.c,v 1.37 1999/02/13 23:17:10 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parser.c,v 1.38 1999/05/13 07:28:39 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,34 +20,32 @@
#include "parser/parse_node.h"
#include "parser/parser.h"
#if defined(FLEX_SCANNER)
extern void DeleteBuffer(void);
#endif /* FLEX_SCANNER */
char *parseString; /* the char* which holds the string to be
* parsed */
List *parsetree = NIL;
List *parsetree; /* result of parsing is left here */
#ifdef SETS_FIXED
static void fixupsets();
static void define_sets();
#endif
/*
* parser-- returns a list of parse trees
*
* CALLER is responsible for free'ing the list returned
*/
QueryTreeList *
List *
parser(char *str, Oid *typev, int nargs)
{
QueryTreeList *queryList;
List *queryList;
int yyresult;
#if defined(FLEX_SCANNER)
extern void DeleteBuffer(void);
#endif /* FLEX_SCANNER */
init_io();
parseString = pstrdup(str);
parsetree = NIL; /* in case parser forgets to set it */
parser_init(typev, nargs);
yyresult = yyparse();
@ -59,7 +57,7 @@ parser(char *str, Oid *typev, int nargs)
clearerr(stdin);
if (yyresult) /* error */
return (QueryTreeList *) NULL;
return (List *) NULL;
queryList = parse_analyze(parsetree, NULL);