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Further cleanups for relations in schemas: teach nextval and other

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sequence functions how to cope with qualified names.  Same code is
also used for int4notin, currtid_byrelname, pgstattuple.  Also,
move TOAST tables into special pg_toast namespace.
This commit is contained in:
Tom Lane
2002-03-30 01:02:42 +00:00
parent 25004eec95
commit 5f4745adf4
14 changed files with 261 additions and 178 deletions
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118
src/backend/utils/adt/varlena.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.79 2002/03/05 05:33:19 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.80 2002/03/30 01:02:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1039,6 +1039,122 @@ name_text(PG_FUNCTION_ARGS)
}
/*
* textToQualifiedNameList - convert a text object to list of names
*
* This implements the input parsing needed by nextval() and other
* functions that take a text parameter representing a qualified name.
* We split the name at dots, downcase if not double-quoted, and
* truncate names if they're too long.
*
* This is a kluge, really, and exists only for historical reasons.
* A better notation for such functions would be nextval(relname).
*/
List *
textToQualifiedNameList(text *textval, const char *caller)
{
char *rawname;
char *nextp;
List *result = NIL;
/* Convert to C string (handles possible detoasting). */
/* Note we rely on being able to modify rawname below. */
rawname = DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(textval)));
nextp = rawname;
do
{
char *curname;
char *endp;
char *cp;
int curlen;
if (*nextp == '\"')
{
/* Quoted name --- collapse quote-quote pairs, no downcasing */
curname = nextp + 1;
for (;;)
{
endp = strchr(nextp + 1, '\"');
if (endp == NULL)
elog(ERROR, "%s: invalid quoted name: mismatched quotes",
caller);
if (endp[1] != '\"')
break; /* found end of quoted name */
/* Collapse adjacent quotes into one quote, and look again */
memmove(endp, endp+1, strlen(endp));
nextp = endp;
}
*endp = '\0';
nextp = endp + 1;
if (*nextp)
{
if (*nextp != '.')
elog(ERROR, "%s: invalid name syntax",
caller);
nextp++;
if (*nextp == '\0')
elog(ERROR, "%s: invalid name syntax",
caller);
}
}
else
{
/* Unquoted name --- extends to next dot */
if (*nextp == '\0') /* empty name not okay here */
elog(ERROR, "%s: invalid name syntax",
caller);
curname = nextp;
endp = strchr(nextp, '.');
if (endp)
{
*endp = '\0';
nextp = endp + 1;
if (*nextp == '\0')
elog(ERROR, "%s: invalid name syntax",
caller);
}
else
nextp = nextp + strlen(nextp);
/*
* It's important that this match the identifier downcasing code
* used by backend/parser/scan.l.
*/
for (cp = curname; *cp; cp++)
{
if (isupper((unsigned char) *cp))
*cp = tolower((unsigned char) *cp);
}
}
/* Truncate name if it's overlength; again, should match scan.l */
curlen = strlen(curname);
if (curlen >= NAMEDATALEN)
{
#ifdef MULTIBYTE
curlen = pg_mbcliplen(curname, curlen, NAMEDATALEN - 1);
curname[curlen] = '\0';
#else
curname[NAMEDATALEN - 1] = '\0';
#endif
}
/*
* Finished isolating current name --- add it to list
*/
result = lappend(result, makeString(pstrdup(curname)));
/*
* Loop back if we found a dot
*/
} while (*nextp);
pfree(rawname);
return result;
}
/*****************************************************************************
* Comparison Functions used for bytea
*