[MDEV-8561] CONNECT return value of NULL from SQL Server ODBC tables for rows that has a value of 0 from a column of type decimal - Jira

In 10.0.20 CONNECT will return the value NULL for rows that has value of 0 from SQL Server ODBC table from column of type decimal.

This did not happen in 10.0.17

I create a table on SQL Server and populate it with one row of value 0

create table t_dec_test(col1 decimal(10, 3))

insert into t_dec_test

values (0)

Behavior in 10.0.20

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 8

Server version: 10.0.20-MariaDB-log mariadb.org binary distribution

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> use util

Database changed

MariaDB [util]> create table t_dec_test

    -> ENGINE=CONNECT CONNECTION='DSN=DEV;uid=user;pwd=password' `TABLE_TYPE`='ODBC'

    -> \G

Query OK, 0 rows affected (0.09 sec)

MariaDB [util]> select * from t_dec_test\G

*************************** 1. row ***************************

col1: NULL

1 row in set (0.03 sec)

MariaDB [util]> show create table t_dec_test\G

*************************** 1. row ***************************

       Table: t_dec_test

Create Table: CREATE TABLE `t_dec_test` (

  `col1` decimal(12,3) DEFAULT NULL

) ENGINE=CONNECT DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci CONNECTION='DSN=DEV;uid=user;pwd=password' `TABLE_TYPE`='ODBC'

1 row in set (0.00 sec)

MariaDB [util]>

Behavior in 10.0.17

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 5

Server version: 10.0.17-MariaDB mariadb.org binary distribution

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> use util;

Database changed

MariaDB [util]> create table t_dec_test

    -> ENGINE=CONNECT CONNECTION='DSN=DEV;uid=user;pwd=password' `TABLE_TYPE`='ODBC'\G

Query OK, 0 rows affected (0.06 sec)

MariaDB [util]> select * from t_dec_test\G

*************************** 1. row ***************************

col1: 0.000

1 row in set (0.04 sec)

MariaDB [util]> show create table t_dec_test\G

*************************** 1. row ***************************

       Table: t_dec_test

Create Table: CREATE TABLE `t_dec_test` (

  `col1` decimal(10,3) DEFAULT NULL

) ENGINE=CONNECT DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci CONNECTION='DSN=DEV;uid=user;pwd=password' `TABLE_TYPE`='ODBC'

1 row in set (0.00 sec)

MariaDB [util]>

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