| Bug #26479 | Use of CONCAT function with NULL fields | ||
|---|---|---|---|
| Submitted: | 19 Feb 2007 16:17 | Modified: | 19 Feb 2007 16:41 |
| Reporter: | Jitendra Bangani | Email Updates: | |
| Status: | Not a Bug | Impact on me: | |
| Category: | MySQL Server | Severity: | S3 (Non-critical) |
| Version: | 5.0.27 | OS: | Windows (Microsoft Windows XP) |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | CONCAT NULL | ||
[19 Feb 2007 16:41]
MySQL Verification Team
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Description: When any of the fields used with the CONCAT function contains a NULL value, the output of the query for the records containing a NULL value in a particular field is NULL. How to repeat: Example: mysql> SELECT vend_name, vend_state -> FROM vendors; +-----------------+------------+ | vend_name | vend_state | +-----------------+------------+ | Bears R Us | MI | | Bear Emporium | OH | | Doll House Inc. | CA | | Furball Inc. | NY | | Fun and Games | NULL | | Jouets et ours | NULL | +-----------------+------------+ 6 rows in set (0.00 sec) mysql> SELECT CONCAT(vend_name, ' (', vend_state, ')') -> FROM vendors; +------------------------------------------+ | CONCAT(vend_name, ' (', vend_state, ')') | +------------------------------------------+ | Bears R Us (MI) | | Bear Emporium (OH) | | Doll House Inc. (CA) | | Furball Inc. (NY) | | NULL | | NULL | +------------------------------------------+ 6 rows in set (0.00 sec) Here the last two records are displayed as NULL even though the 'vend_name' field for that record is NOT NULL.