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.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/include/utils/int8.h b/src/include/utils/int8.h
index 4ffa3bca504..f8b337e3c0c 100644
--- a/src/include/utils/int8.h
+++ b/src/include/utils/int8.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: int8.h,v 1.34 2002/06/20 20:29:53 momjian Exp $
+ * $Id: int8.h,v 1.35 2002/09/18 21:35:25 tgl Exp $
  *
  * NOTES
  * These data types are supported on all 64-bit architectures, and may
@@ -29,6 +29,8 @@
 #define INT64_FORMAT "%ld"
 #endif
 
+extern bool scanint8(const char *str, bool errorOK, int64 *result);
+
 extern Datum int8in(PG_FUNCTION_ARGS);
 extern Datum int8out(PG_FUNCTION_ARGS);
 
@@ -106,6 +108,12 @@ extern Datum int82(PG_FUNCTION_ARGS);
 extern Datum i8tod(PG_FUNCTION_ARGS);
 extern Datum dtoi8(PG_FUNCTION_ARGS);
 
+extern Datum i8tof(PG_FUNCTION_ARGS);
+extern Datum ftoi8(PG_FUNCTION_ARGS);
+
+extern Datum i8tooid(PG_FUNCTION_ARGS);
+extern Datum oidtoi8(PG_FUNCTION_ARGS);
+
 extern Datum int8_text(PG_FUNCTION_ARGS);
 extern Datum text_int8(PG_FUNCTION_ARGS);