Re: Wrong column size using MIN/MAX without return result
От | Inoue, Hiroshi |
---|---|
Тема | Re: Wrong column size using MIN/MAX without return result |
Дата | |
Msg-id | d6fec2c3-7934-c5da-a167-0bf8482dad8a@dream.email.ne.jp обсуждение исходный текст |
Ответ на | Wrong column size using MIN/MAX without return result (Fabrízio de Royes Mello <fabriziomello@gmail.com>) |
Список | pgsql-odbc |
Hi,
On 2018/09/24 23:49, Fabrízio de Royes Mello wrote:
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.
SQL returns NULL for MIN/MAX functions without results.
regards,
Hiroshi Inoue
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 11 rows fetchedSQL> SELECT MAX(FLD) AS ERROR FROM T1 WHERE 1 = 0;+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+| error |+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+| |+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+SQLRowCount returns 11 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 11 rows fetchedSQL> 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 11 rows fetchedSQL> SELECT FLD AS ERROR FROM T1 WHERE 1 = 0;+-----------+| error |+-----------++-----------+SQLRowCount returns 0There are some config to fix this weird behaviour?Regards,--Fabrízio de Royes Mello Timbira - http://www.timbira.com.br/
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