mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Do a better job of selecting candidates among functions

Browse Source 
when no exact match.
Clean up elog error messages.
This commit is contained in:
Thomas G. Lockhart 1999-02-23 07:51:53 +00:00
parent b4def32439
commit 681c587d22
1 changed files with 51 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

101
src/backend/parser/parse_func.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.38 1999/02/13 23:17:08 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.39 1999/02/23 07:51:53 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -828,66 +828,67 @@ func_select_candidate(int nargs,
}
}
if (ncandidates == 1)
return candidates->args;
/*
* Still too many candidates?
* Try assigning types for the unknown columns.
*/
if (ncandidates > 1)
for (i = 0; i < nargs; i++)
{
for (i = 0; i < nargs; i++)
if (input_typeids[i] == UNKNOWNOID)
{
if (input_typeids[i] == UNKNOWNOID)
slot_category = INVALID_TYPE;
slot_type = InvalidOid;
for (current_candidate = candidates;
current_candidate != NULL;
current_candidate = current_candidate->next)
{
slot_category = INVALID_TYPE;
slot_type = InvalidOid;
for (current_candidate = candidates;
current_candidate != NULL;
current_candidate = current_candidate->next)
{
current_typeids = current_candidate->args;
current_type = current_typeids[i];
current_category = TypeCategory(current_typeids[i]);
current_typeids = current_candidate->args;
current_type = current_typeids[i];
current_category = TypeCategory(current_typeids[i]);
if (slot_category == InvalidOid)
{
slot_category = current_category;
slot_type = current_type;
}
else if ((current_category != slot_category)
&& IS_BUILTIN_TYPE(current_type))
{
return NULL;
}
else if (current_type != slot_type)
{
if (IsPreferredType(slot_category, current_type))
{
slot_type = current_type;
candidates = current_candidate;
}
else
{
}
}
if (slot_category == InvalidOid)
{
slot_category = current_category;
slot_type = current_type;
}
if (slot_type != InvalidOid)
else if ((current_category != slot_category)
&& IS_BUILTIN_TYPE(current_type))
{
input_typeids[i] = slot_type;
return NULL;
}
else if (current_type != slot_type)
{
if (IsPreferredType(slot_category, current_type))
{
slot_type = current_type;
candidates = current_candidate;
}
else if (IsPreferredType(slot_category, slot_type))
{
candidates->next = current_candidate->next;
}
}
}
else
if (slot_type != InvalidOid)
{
input_typeids[i] = slot_type;
}
}
ncandidates = 0;
for (current_candidate = candidates;
current_candidate != NULL;
current_candidate = current_candidate->next)
ncandidates++;
else
{
}
}
ncandidates = 0;
for (current_candidate = candidates;
current_candidate != NULL;
current_candidate = current_candidate->next)
ncandidates++;
if (ncandidates == 1)
return candidates->args;
@ -964,7 +965,7 @@ func_get_detail(char *funcname,
ftup = SearchSysCacheTuple(PRONAME,
PointerGetDatum(funcname),
Int32GetDatum(nargs),
PointerGetDatum(*true_typeids),
PointerGetDatum(*true_typeids),
0);
Assert(HeapTupleIsValid(ftup));
}
@ -976,8 +977,8 @@ func_get_detail(char *funcname,
else if (ncandidates > 1)
{
*true_typeids = func_select_candidate(nargs,
current_input_typeids,
current_function_typeids);
current_input_typeids,
current_function_typeids);
/* couldn't decide, so quit */
if (*true_typeids == NULL)
@ -991,9 +992,9 @@ func_get_detail(char *funcname,
else
{
ftup = SearchSysCacheTuple(PRONAME,
PointerGetDatum(funcname),
PointerGetDatum(funcname),
Int32GetDatum(nargs),
PointerGetDatum(*true_typeids),
PointerGetDatum(*true_typeids),
0);
Assert(HeapTupleIsValid(ftup));
}
@ -1012,7 +1013,7 @@ func_get_detail(char *funcname,
{
tp = typeidType(oid_array[0]);
if (typeTypeFlag(tp) == 'c')
elog(ERROR, "func_get_detail: No such attribute or function '%s'", funcname);
elog(ERROR, "No such attribute or function '%s'", funcname);
}
}
else