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authorTom Lane2002-09-18 21:35:25 +0000
committerTom Lane2002-09-18 21:35:25 +0000
commitb26dfb95222fddd25322bdddf3a5a58d3392d8b1 (patch)
tree757cf0bafab985d38a5c84d3afebe5edd34c4f27 /src/backend/nodes/outfuncs.c
parentcc70ba2e4daa78ba99619770e19beb06de3dfd1c (diff)
Extend pg_cast castimplicit column to a three-way value; this allows us
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.
Diffstat (limited to 'src/backend/nodes/outfuncs.c')
-rw-r--r--src/backend/nodes/outfuncs.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index 8873c4e3d2c..fde42291691 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -5,7 +5,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.173 2002/09/04 20:31:19 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.174 2002/09/18 21:35:21 tgl Exp $
*
* NOTES
* Every (plan) node in POSTGRES has an associated "out" routine which
@@ -860,10 +860,11 @@ static void
_outFunc(StringInfo str, Func *node)
{
appendStringInfo(str,
- " FUNC :funcid %u :funcresulttype %u :funcretset %s ",
+ " FUNC :funcid %u :funcresulttype %u :funcretset %s :funcformat %d ",
node->funcid,
node->funcresulttype,
- booltostr(node->funcretset));
+ booltostr(node->funcretset),
+ (int) node->funcformat);
}
/*
@@ -914,9 +915,11 @@ _outRelabelType(StringInfo str, RelabelType *node)
{
appendStringInfo(str, " RELABELTYPE :arg ");
_outNode(str, node->arg);
-
- appendStringInfo(str, " :resulttype %u :resulttypmod %d ",
- node->resulttype, node->resulttypmod);
+ appendStringInfo(str,
+ " :resulttype %u :resulttypmod %d :relabelformat %d ",
+ node->resulttype,
+ node->resulttypmod,
+ (int) node->relabelformat);
}
/*