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Improve error reporting in parseTypeString(), motivated by confusing

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behavior reported by Martin Marques.
This commit is contained in:
Tom Lane 2003-10-20 17:25:42 +00:00
parent 3b72087bf6
commit 17841ddbbf
1 changed files with 28 additions and 6 deletions

34
src/backend/parser/parse_type.c

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_type.c,v 1.62 2003/09/25 06:58:01 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_type.c,v 1.63 2003/10/20 17:25:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -430,14 +430,21 @@ typeidTypeRelid(Oid type_id)
return result;
}
/*
* error context callback for parse failure during parseTypeString()
*/
static void
pts_error_callback(void *arg)
{
const char *str = (const char *) arg;
errcontext("invalid type name \"%s\"", str);
}
/*
* Given a string that is supposed to be a SQL-compatible type declaration,
* such as "int4" or "integer" or "character varying(32)", parse
* the string and convert it to a type OID and type modifier.
*
* This routine is not currently used by the main backend, but it is
* exported for use by add-on modules such as plpgsql, in hopes of
* centralizing parsing knowledge about SQL type declarations.
*/
void
parseTypeString(const char *str, Oid *type_id, int32 *typmod)
@ -448,12 +455,27 @@ parseTypeString(const char *str, Oid *type_id, int32 *typmod)
ResTarget *restarget;
TypeCast *typecast;
TypeName *typename;
ErrorContextCallback ptserrcontext;
/* make sure we give useful error for empty input */
if (strspn(str, " \t\n\r\f") == strlen(str))
goto fail;
initStringInfo(&buf);
appendStringInfo(&buf, "SELECT (NULL::%s)", str);
appendStringInfo(&buf, "SELECT NULL::%s", str);
/*
* Setup error traceback support in case of ereport() during parse
*/
ptserrcontext.callback = pts_error_callback;
ptserrcontext.arg = (void *) str;
ptserrcontext.previous = error_context_stack;
error_context_stack = &ptserrcontext;
raw_parsetree_list = raw_parser(buf.data);
error_context_stack = ptserrcontext.previous;
/*
* Make sure we got back exactly what we expected and no more;
* paranoia is justified since the string might contain anything.