Hi,
<[email protected]> wrote:
> The following plpgsql function errors out with cvs head:
>
> CREATE function test_assign() returns void
> AS
> $$ declare x int;
> BEGIN
> x := 9E3/2;
> END
> $$ LANGUAGE 'plpgsql';
>
> postgres=# select test_assign();
> ERROR: invalid input syntax for integer: "4500.0000000000000000"
> CONTEXT: PL/pgSQL function "test_assign" line 3 at assignment
>
> We do have an existing cast from numeric to type integer. But here
> basically we convert the value to string in exec_cast_value before calling
> int4in. And then use of strtol in pg_atoi leads to this complaint. Guess
> converting the value to string is not always a good strategy.
>
PFA, patch which uses find_coercion_pathway to find a direct
COERCION_PATH_FUNC function and uses that if it is available. Or is there a
better approach? Seems to handle the above issue with this patch.
Regards,
Nikhils
--
http://www.enterprisedb.com
Index: src/pl/plpgsql/src/pl_exec.c
===================================================================
RCS file: /repositories/postgreshome/cvs/pgsql/src/pl/plpgsql/src/pl_exec.c,v
retrieving revision 1.225
diff -c -r1.225 pl_exec.c
*** src/pl/plpgsql/src/pl_exec.c 20 Nov 2008 15:36:22 -0000 1.225
--- src/pl/plpgsql/src/pl_exec.c 29 Dec 2008 15:23:49 -0000
***************
*** 24,29 ****
--- 24,30 ----
#include "funcapi.h"
#include "nodes/nodeFuncs.h"
#include "parser/scansup.h"
+ #include "parser/parse_coerce.h"
#include "tcop/tcopprot.h"
#include "utils/array.h"
#include "utils/builtins.h"
***************
*** 4732,4750 ****
{
if (!isnull)
{
! char *extval;
! extval = convert_value_to_string(value, valtype);
! /* Allow input function to use SPI ... see notes above */
! SPI_push();
! value = InputFunctionCall(reqinput, extval,
! reqtypioparam, reqtypmod);
! SPI_pop();
! pfree(extval);
}
else
{
--- 4733,4777 ----
{
if (!isnull)
{
! /*
! * find out if there is a coercion pathway via a function
! */
! CoercionPathType pathtype;
! Oid castfunc;
! pathtype = find_coercion_pathway(reqtype, valtype,
! COERCION_ASSIGNMENT,
! &castfunc);
!
! if (pathtype == COERCION_PATH_FUNC)
! {
! FmgrInfo cast_func_finfo;
!
! fmgr_info_cxt(castfunc, &cast_func_finfo,
! CurrentMemoryContext);
! cast_func_finfo.fn_oid = InvalidOid;
!
! /* do we need reqtypmod for cast functions? */
! value = FunctionCall2(&cast_func_finfo,
! value,
! reqtypmod);
! }
! else
! {
! char *extval;
! extval = convert_value_to_string(value, valtype);
! /* Allow input function to use SPI ... see notes above */
! SPI_push();
! value = InputFunctionCall(reqinput, extval,
! reqtypioparam, reqtypmod);
! SPI_pop();
!
! pfree(extval);
! }
}
else
{
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