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Home/ Questions/Q 9283653
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Editorial Team
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Editorial Team
Asked: June 18, 20262026-06-18T18:41:07+00:00 2026-06-18T18:41:07+00:00

CREATE SCHEMA IF NOT EXISTS `utftest` DEFAULT CHARACTER SET utf16; CREATE TABLE IF NOT

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CREATE SCHEMA IF NOT EXISTS `utftest`  DEFAULT CHARACTER SET utf16;
CREATE  TABLE IF NOT EXISTS `metadata_labels` (`metadata_id` INT NOT NULL , `label` VARCHAR(256) NOT NULL ,  PRIMARY KEY (`metadata_id`, `label`));

however I get the following error msg:

Specified key was too long; max key length is 767 bytes

Please advise

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  1. Editorial Team
    Editorial Team
    2026-06-18T18:41:08+00:00Added an answer on June 18, 2026 at 6:41 pm

    UTF 16 uses 32 bits per character (4 bytes) in MySQL. 4 x 256 > 767.

    If possible, I would recommend using something other than UTF16 VARCHAR for your key.

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