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How to determine a binary column's default value
Posted by: Michel H
Date: August 08, 2021 05:53AM

Hi everyone!

I try to determine a binary column's default value for MySQL 5.6, 5.7 and 8.0. But I just can't manage to extract them.

Example table:

CREATE TABLE `binary_test` (
`col` varbinary(100) DEFAULT X'aaaa00aaaaaaaaffffff'

Try 1: Getting the default from information_schema.columns doesn't work, it shows an empty string.

SELECT * FROM information_schema.columns WHERE column_name='col'

Try 2: Show create table gets closer but shows question marks.

SHOW CREATE TABLE binary_test;

Try 3: Explain also doesn't work.. (EXPLAIN binary_test)

And now I am out of ideas :)

Does anyone know how to get the binary column default value?

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How to determine a binary column's default value
August 08, 2021 05:53AM

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