Mega Code Archive
A pattern match against a binary column is case sensitive
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mysql>
mysql> CREATE TABLE mytable
-> (
-> name VARCHAR(20)
-> );
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO mytable (name)
-> VALUES
-> ('copper'),
-> ('gold'),
-> ('iron'),
-> ('lead'),
-> ('mercury'),
-> ('platinum'),
-> ('silver'),
-> ('tin')
-> ;
Query OK, 8 rows affected (0.00 sec)
Records: 8 Duplicates: 0 Warnings: 0
mysql>
mysql> SELECT * FROM mytable;
+----------+
| name |
+----------+
| copper |
| gold |
| iron |
| lead |
| mercury |
| platinum |
| silver |
| tin |
+----------+
8 rows in set (0.00 sec)
mysql>
mysql> ALTER TABLE mytable ADD binname VARCHAR(20) BINARY;
Query OK, 8 rows affected (0.01 sec)
Records: 8 Duplicates: 0 Warnings: 0
mysql>
mysql> UPDATE mytable SET binname = name;
Query OK, 8 rows affected (0.00 sec)
Rows matched: 8 Changed: 8 Warnings: 0
mysql>
mysql> SELECT binname, binname LIKE '%I%', binname REGEXP 'I' FROM mytable;
+----------+--------------------+--------------------+
| binname | binname LIKE '%I%' | binname REGEXP 'I' |
+----------+--------------------+--------------------+
| copper | 0 | 0 |
| gold | 0 | 0 |
| iron | 0 | 0 |
| lead | 0 | 0 |
| mercury | 0 | 0 |
| platinum | 0 | 0 |
| silver | 0 | 0 |
| tin | 0 | 0 |
+----------+--------------------+--------------------+
8 rows in set (0.00 sec)
mysql> SELECT binname, UPPER(binname) LIKE '%I%', UPPER(binname) REGEXP 'I' FROM mytable;
+----------+---------------------------+---------------------------+
| binname | UPPER(binname) LIKE '%I%' | UPPER(binname) REGEXP 'I' |
+----------+---------------------------+---------------------------+
| copper | 0 | 0 |
| gold | 0 | 0 |
| iron | 1 | 1 |
| lead | 0 | 0 |
| mercury | 0 | 0 |
| platinum | 1 | 1 |
| silver | 1 | 1 |
| tin | 1 | 1 |
+----------+---------------------------+---------------------------+
8 rows in set (0.00 sec)
mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)
mysql>
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