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Make functional indexes accept binary-compatible functions, for example

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CREATE INDEX fooi ON foo (lower(f1)) where f1 is varchar rather than text.
This commit is contained in:
Tom Lane
2000-08-20 00:44:19 +00:00
parent 5cfbf3aba2
commit 4b8f1bcb9c
3 changed files with 52 additions and 55 deletions
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42
src/backend/parser/parse_func.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.87 2000/08/08 15:42:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.88 2000/08/20 00:44:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -37,18 +37,10 @@ static Node *ParseComplexProjection(ParseState *pstate,
char *funcname,
Node *first_arg,
bool *attisset);
static Oid **argtype_inherit(int nargs, Oid *oid_array);
static Oid **argtype_inherit(int nargs, Oid *argtypes);
static int find_inheritors(Oid relid, Oid **supervec);
static CandidateList func_get_candidates(char *funcname, int nargs);
static bool
func_get_detail(char *funcname,
int nargs,
Oid *oid_array,
Oid *funcid, /* return value */
Oid *rettype, /* return value */
bool *retset, /* return value */
Oid **true_typeids);
static Oid **gen_cross_product(InhPaths *arginh, int nargs);
static void make_arguments(ParseState *pstate,
int nargs,
@ -1097,10 +1089,10 @@ func_select_candidate(int nargs,
* c) if the answer is more than one, attempt to resolve the conflict
* d) if the answer is zero, try the next array from vector #1
*/
static bool
bool
func_get_detail(char *funcname,
int nargs,
Oid *oid_array,
Oid *argtypes,
Oid *funcid, /* return value */
Oid *rettype, /* return value */
bool *retset, /* return value */
@ -1112,13 +1104,13 @@ func_get_detail(char *funcname,
ftup = SearchSysCacheTuple(PROCNAME,
PointerGetDatum(funcname),
Int32GetDatum(nargs),
PointerGetDatum(oid_array),
PointerGetDatum(argtypes),
0);
if (HeapTupleIsValid(ftup))
{
/* given argument types are the right ones */
*true_typeids = oid_array;
*true_typeids = argtypes;
}
else
{
@ -1138,11 +1130,11 @@ func_get_detail(char *funcname,
Oid *current_input_typeids;
/*
* First we will search with the given oid_array, then with
* First we will search with the given argtypes, then with
* variants based on replacing complex types with their
* inheritance ancestors. Stop as soon as any match is found.
*/
current_input_typeids = oid_array;
current_input_typeids = argtypes;
do
{
@ -1200,7 +1192,7 @@ func_get_detail(char *funcname,
* vectors.
*/
if (input_typeid_vector == NULL)
input_typeid_vector = argtype_inherit(nargs, oid_array);
input_typeid_vector = argtype_inherit(nargs, argtypes);
current_input_typeids = *input_typeid_vector++;
}
@ -1243,7 +1235,7 @@ func_get_detail(char *funcname,
* catalogs.
*/
static Oid **
argtype_inherit(int nargs, Oid *oid_array)
argtype_inherit(int nargs, Oid *argtypes)
{
Oid relid;
int i;
@ -1253,8 +1245,8 @@ argtype_inherit(int nargs, Oid *oid_array)
{
if (i < nargs)
{
arginh[i].self = oid_array[i];
if ((relid = typeidTypeRelid(oid_array[i])) != InvalidOid)
arginh[i].self = argtypes[i];
if ((relid = typeidTypeRelid(argtypes[i])) != InvalidOid)
arginh[i].nsupers = find_inheritors(relid, &(arginh[i].supervec));
else
{
@ -1467,16 +1459,6 @@ typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId)
/* make_arguments()
* Given the number and types of arguments to a function, and the
* actual arguments and argument types, do the necessary typecasting.
*
* There are two ways an input typeid can differ from a function typeid:
* 1) the input type inherits the function type, so no typecasting required
* 2) the input type can be typecast into the function type
* Right now, we only typecast unknowns, and that is all we check for.
*
* func_get_detail() now can find coercions for function arguments which
* will make this function executable. So, we need to recover these
* results here too.
* - thomas 1998-03-25
*/
static void
make_arguments(ParseState *pstate,