How do I create an index on a column in MySQL v 5.0 (myisam db engine) based upon the length of its value its a TEXT data type up to 7000 characters, do I have to add another column with the length of the first column?
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How do I create an index on a column in MySQL v 5.0 (myisam db engine) based upon the length of its value its a TEXT data type up to 7000 characters, do I have to add another column with the length of the first column?
Yes, as MySQL doesn’t support function-based indexes (like
ADD INDEX myIndex(LENGTH(text))), you’ll need a new int column and define a trigger to auto-update it after inserts and updates.