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Extend pg_cast castimplicit column to a three-way value; this allows us

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to be flexible about assignment casts without introducing ambiguity in
operator/function resolution.  Introduce a well-defined promotion hierarchy
for numeric datatypes (int2->int4->int8->numeric->float4->float8).
Change make_const to initially label numeric literals as int4, int8, or
numeric (never float8 anymore).
Explicitly mark Func and RelabelType nodes to indicate whether they came
from a function call, explicit cast, or implicit cast; use this to do
reverse-listing more accurately and without so many heuristics.
Explicit casts to char, varchar, bit, varbit will truncate or pad without
raising an error (the pre-7.2 behavior), while assigning to a column without
any explicit cast will still raise an error for wrong-length data like 7.3.
This more nearly follows the SQL spec than 7.2 behavior (we should be
reporting a 'completion condition' in the explicit-cast cases, but we have
no mechanism for that, so just do silent truncation).
Fix some problems with enforcement of typmod for array elements;
it didn't work at all in 'UPDATE ... SET array[n] = foo', for example.
Provide a generalized array_length_coerce() function to replace the
specialized per-array-type functions that used to be needed (and were
missing for NUMERIC as well as all the datetime types).
Add missing conversions int8<->float4, text<->numeric, oid<->int8.
initdb forced.
This commit is contained in:
Tom Lane
2002-09-18 21:35:25 +00:00
parent cc70ba2e4d
commit b26dfb9522
70 changed files with 1642 additions and 1528 deletions
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68
src/backend/utils/adt/regproc.c
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@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.75 2002/09/04 20:31:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.76 2002/09/18 21:35:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -49,7 +49,7 @@ static void parseNameAndArgTypes(const char *string, const char *caller,
/*
* regprocin - converts "proname" to proc OID
*
* We also accept a numeric OID, mostly for historical reasons.
* We also accept a numeric OID, for symmetry with the output routine.
*
* '-' signifies unknown (OID 0). In all other cases, the input must
* match an existing pg_proc entry.
@ -71,15 +71,8 @@ regprocin(PG_FUNCTION_ARGS)
pro_name_or_oid[0] <= '9' &&
strspn(pro_name_or_oid, "0123456789") == strlen(pro_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
result = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(pro_name_or_oid)));
result = (RegProcedure) GetSysCacheOid(PROCOID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!RegProcedureIsValid(result))
elog(ERROR, "No procedure with oid %s", pro_name_or_oid);
PG_RETURN_OID(result);
}
@ -211,7 +204,7 @@ regprocout(PG_FUNCTION_ARGS)
/*
* regprocedurein - converts "proname(args)" to proc OID
*
* We also accept a numeric OID, mostly for historical reasons.
* We also accept a numeric OID, for symmetry with the output routine.
*
* '-' signifies unknown (OID 0). In all other cases, the input must
* match an existing pg_proc entry.
@ -235,15 +228,8 @@ regprocedurein(PG_FUNCTION_ARGS)
pro_name_or_oid[0] <= '9' &&
strspn(pro_name_or_oid, "0123456789") == strlen(pro_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
result = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(pro_name_or_oid)));
result = (RegProcedure) GetSysCacheOid(PROCOID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!RegProcedureIsValid(result))
elog(ERROR, "No procedure with oid %s", pro_name_or_oid);
PG_RETURN_OID(result);
}
@ -361,7 +347,7 @@ regprocedureout(PG_FUNCTION_ARGS)
/*
* regoperin - converts "oprname" to operator OID
*
* We also accept a numeric OID, mostly for historical reasons.
* We also accept a numeric OID, for symmetry with the output routine.
*
* '0' signifies unknown (OID 0). In all other cases, the input must
* match an existing pg_operator entry.
@ -383,15 +369,8 @@ regoperin(PG_FUNCTION_ARGS)
opr_name_or_oid[0] <= '9' &&
strspn(opr_name_or_oid, "0123456789") == strlen(opr_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
result = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(opr_name_or_oid)));
result = GetSysCacheOid(OPEROID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!OidIsValid(result))
elog(ERROR, "No operator with oid %s", opr_name_or_oid);
PG_RETURN_OID(result);
}
@ -531,7 +510,7 @@ regoperout(PG_FUNCTION_ARGS)
/*
* regoperatorin - converts "oprname(args)" to operator OID
*
* We also accept a numeric OID, mostly for historical reasons.
* We also accept a numeric OID, for symmetry with the output routine.
*
* '0' signifies unknown (OID 0). In all other cases, the input must
* match an existing pg_operator entry.
@ -556,15 +535,8 @@ regoperatorin(PG_FUNCTION_ARGS)
opr_name_or_oid[0] <= '9' &&
strspn(opr_name_or_oid, "0123456789") == strlen(opr_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
result = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(opr_name_or_oid)));
result = GetSysCacheOid(OPEROID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!OidIsValid(result))
elog(ERROR, "No operator with oid %s", opr_name_or_oid);
PG_RETURN_OID(result);
}
@ -698,7 +670,7 @@ regoperatorout(PG_FUNCTION_ARGS)
/*
* regclassin - converts "classname" to class OID
*
* We also accept a numeric OID, mostly for historical reasons.
* We also accept a numeric OID, for symmetry with the output routine.
*
* '-' signifies unknown (OID 0). In all other cases, the input must
* match an existing pg_class entry.
@ -719,15 +691,8 @@ regclassin(PG_FUNCTION_ARGS)
class_name_or_oid[0] <= '9' &&
strspn(class_name_or_oid, "0123456789") == strlen(class_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
result = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(class_name_or_oid)));
result = GetSysCacheOid(RELOID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!OidIsValid(result))
elog(ERROR, "No class with oid %s", class_name_or_oid);
PG_RETURN_OID(result);
}
@ -843,7 +808,7 @@ regclassout(PG_FUNCTION_ARGS)
/*
* regtypein - converts "typename" to type OID
*
* We also accept a numeric OID, mostly for historical reasons.
* We also accept a numeric OID, for symmetry with the output routine.
*
* '-' signifies unknown (OID 0). In all other cases, the input must
* match an existing pg_type entry.
@ -870,15 +835,8 @@ regtypein(PG_FUNCTION_ARGS)
typ_name_or_oid[0] <= '9' &&
strspn(typ_name_or_oid, "0123456789") == strlen(typ_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
result = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(typ_name_or_oid)));
result = GetSysCacheOid(TYPEOID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!OidIsValid(result))
elog(ERROR, "No type with oid %s", typ_name_or_oid);
PG_RETURN_OID(result);
}