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Change parse-time representation of float literals (which include oversize

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integers) to be strings instead of 'double'.  We convert from string form
to internal representation only after type resolution has determined the
correct type for the constant.  This eliminates loss-of-precision worries
and gets rid of the change in behavior seen at 17 digits with the
previous kluge.
This commit is contained in:
Tom Lane
2000-02-21 18:47:12 +00:00
parent ee97d103cc
commit 393f313227
12 changed files with 186 additions and 186 deletions
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12
src/backend/parser/parse_expr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.69 2000/02/20 21:32:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.70 2000/02/21 18:47:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -726,23 +726,19 @@ parser_typecast_constant(Value *expr, TypeName *typename)
switch (nodeTag(expr))
{
case T_String:
const_string = DatumGetPointer(expr->val.str);
break;
case T_Integer:
string_palloced = true;
const_string = int4out(expr->val.ival);
break;
case T_Float:
string_palloced = true;
const_string = float8out(&expr->val.dval);
case T_String:
const_string = expr->val.str;
break;
case T_Null:
isNull = true;
break;
default:
elog(ERROR,
"Cannot cast this expression to type '%s'",
elog(ERROR, "Cannot cast this expression to type '%s'",
typename->name);
}