Thread: sqlDescribeCol not setting null flag correctly for sqlDescribeCol
A basic table is described where one column has a null constraint: create table TNUM( RNUM integer not null, CNUM numeric(7,2) )
A simple view is defined that projects all the columns of said table: create view VNUM as select * from TNUM
A query which projects the columns of the table or the view will return inconsistent null flags when you call sqlDescribeCol after sqlPrepare
Does not matter if you have parse, server side prepare etc enabled/disabled.
Looks like another bug to me.
SQL_DRIVER_NAME=6, 30, "PSQLODBC35W.DLL"
SQL_DRIVER_ODBC_VER=77, 10, "03.51"
SQL_DRIVER_VER=7, 20, "08.04.0100"
Describe Column All:
icol, szColName, *pcbColName, *pfSqlType, *pcbColDef, *pibScale, *pfNullable
1, rnum, 4, SQL_INTEGER=4, 10, 0, SQL_NO_NULLS=0
2, cnum, 4, SQL_NUMERIC=2, 7, 2, SQL_NULLABLE=1
Describe Column All:
icol, szColName, *pcbColName, *pfSqlType, *pcbColDef, *pibScale, *pfNullable
1, rnum, 4, SQL_INTEGER=4, 10, 0, SQL_NULLABLE=1
2, cnum, 4, SQL_NUMERIC=2, 7, 2, SQL_NULLABLE=1
the6campbells wrote:
>
> A basic table is described where one column has a null
> constraint: create table TNUM( RNUM integer not null, CNUM numeric(7,2) )
> A simple view is defined that projects all the columns of said
> table: create view VNUM as select * from TNUM
> A query which projects the columns of the table or the view will return
> inconsistent null flags when you call sqlDescribeCol after sqlPrepare
>
> Does not matter if you have parse, server side prepare etc
> enabled/disabled.
>
> Looks like another bug to me.
It seems very hard for the driver to get more accurate results
than psql does. I see the following result via psql.
xxxxx=> \d tnum
Table "public.tnum"
Column | Type | Modifiers
--------+--------------+-----------
rnum | integer | not null
cnum | numeric(7,2) |
xxxxx=> \d vnum
View "public.vnum"
Column | Type | Modifiers
--------+--------------+-----------
rnum | integer |
cnum | numeric(7,2) |
View definition:
SELECT tnum.rnum, tnum.cnum
FROM tnum;
regards,
Hiroshi Inoue