How Can I Create A REGEXP Constraint On A Column?

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1 How can I create a REGEXP constraint on a column?

Problem Description:

I am trying to put a regexp constraint on a field "StaffAdress" such that it should only end with " street".

This is my attempt, but it still doesn’t seem to be valid. I tried regexp ‘.*street$’ and regexp ‘street$’ but both did not let me add "test street" in the table.

CREATE TABLE MsStaff (
   `StaffId` CHAR(4) PRIMARY KEY CHECK (`StaffId` regexp 'S[0-9][0-9][0-9]'),
    `StaffName` VARCHAR(100) NOT NULL,
    `StaffGender` VARCHAR(6) NOT NULL,
    `StaffAddress` VARCHAR(100) NOT NULL CHECK ('StaffAddress' regexp '.*street$')
)

I’m using 10.4.19-MariaDB

Solution – 1

I think your problem is that you are comparing a literal string, not a column, to your regex.

...CHECK ('StaffAddress' regexp '.*street$')

should be (don’t forget the space)

...CHECK (StaffAddress regexp '.* street$')

Solution – 2

'StaffAddress' regexp '.*street$' will always return false. Column names have to be quoted in backticks, not in single quotes.

Correct would be:

`StaffAddress` VARCHAR(100) NOT NULL CHECK (`StaffAddress` regexp 'w* street$')

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