Case sensitive RLIKE

Consider a table datatbl like this:

+----------+
| strfield |
+----------+
|    abcde |
|    fgHIJ |
|    KLmno |
+----------+

I want to write a query something like this:

select * from datatbl where strfield rlike '[a-z]*';

As in a non-SQL regex, I’d like to return the lowercase row with abcde, but not the rows with capitals. I cannot seem to find an easy way to do this. Am I missing something stupid?

Answer

The MySQL REGEXP/RLIKE sucks for this – you need to cast the data as BINARY for case sensitive searching:

SELECT * 
  FROM datatbl 
 WHERE CAST(strfield  AS BINARY) rlike '[a-z]*';

You’ll find this raised in the comments for the REGEXP/RLIKE documentation.

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