Wrong column size using MIN/MAX without return result
| От | Fabrízio de Royes Mello |
|---|---|
| Тема | Wrong column size using MIN/MAX without return result |
| Дата | |
| Msg-id | CAFcNs+o499EnwGaFBzeNHAyPrjQ7QdJVudE34TtnaLMT_2HAyw@mail.gmail.com обсуждение исходный текст |
| Ответы |
Re: Wrong column size using MIN/MAX without return result
("Inoue, Hiroshi" <h-inoue@dream.email.ne.jp>)
Re: Wrong column size using MIN/MAX without return result (Clemens Ladisch <clemens@ladisch.de>) |
| Список | pgsql-odbc |
Hi all,
We've experiencing an issue using the driver version 10.03.0000 under unixODBC 2.3.1 environment.
When we use MIN/MAX functions in a query returning CHAR without results, the column size is wrong. Seems if we use any function that return "text types" without returning tuples the column size is wrong.
--
Below there are some self contained testcases:
** SQL testcase 1 (ERROR):
SQL> DROP TABLE IF EXISTS T1;
SQL> CREATE TABLE T1 ( FLD char(10) NOT NULL DEFAULT ' ' );
SQL> INSERT INTO T1 VALUES('1');
SQL> INSERT INTO T1 VALUES('22');
SQL> INSERT INTO T1 VALUES('333');
SQL> SELECT MAX(FLD) AS OK FROM T1;
+-----------+
| ok |
+-----------+
| 333 |
+-----------+
SQLRowCount returns 1
1 rows fetched
SQL> SELECT MAX(FLD) AS ERROR FROM T1 WHERE 1 = 0;
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| error |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
SQLRowCount returns 1
1 rows fetched
** SQL testcase 2 (ERROR):
SQL> DROP TABLE IF EXISTS T1;
SQL> CREATE TABLE T1 ( FLD char(10) NOT NULL DEFAULT ' ' );
SQL> INSERT INTO T1 VALUES('1');
SQL> INSERT INTO T1 VALUES('22');
SQL> INSERT INTO T1 VALUES('333');
SQL> SELECT SUBSTR(FLD,1,5) AS OK FROM T1 WHERE FLD = '333';
+----+
| ok |
+----+
| 333|
+----+
SQLRowCount returns 1
1 rows fetched
SQL> SELECT SUBSTR(FLD,1,5) AS ERROR FROM T1 WHERE 1 = 0;
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| error |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
SQLRowCount returns 0
** SQL testcase 3 (OK):
SQL> DROP TABLE IF EXISTS T1;
SQL> CREATE TABLE T1 ( FLD char(10) NOT NULL DEFAULT ' ' );
SQL> INSERT INTO T1 VALUES('1');
SQL> INSERT INTO T1 VALUES('22');
SQL> INSERT INTO T1 VALUES('333');
SQL> SELECT FLD AS OK FROM T1 WHERE FLD = '333';
+-----------+
| ok |
+-----------+
| 333 |
+-----------+
SQLRowCount returns 1
1 rows fetched
SQL> SELECT FLD AS ERROR FROM T1 WHERE 1 = 0;
+-----------+
| error |
+-----------+
+-----------+
SQLRowCount returns 0
There are some config to fix this weird behaviour?
Regards,
Fabrízio de Royes Mello Timbira - http://www.timbira.com.br/
PostgreSQL: Consultoria, Desenvolvimento, Suporte 24x7 e Treinamento
PostgreSQL: Consultoria, Desenvolvimento, Suporte 24x7 e Treinamento
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