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What Happened

A valid CASE statement had a parsing error when the WHEN clause used brackets.

This statement fails:

SELECT 
    CASE
        WHEN abc = 1 THEN NULL
        WHEN (
            defg = 2
            AND hijk = 3
        ) THEN NULL
    END AS result
FROM abc;

Expected Behaviour

It should not fail as it is valid

Observed Behaviour

Fails with a parse error "Could not parse"

How to reproduce

Using the SQL above with sqlfluff parse test.sql --dialect oracle

Dialect

Oracle

Version

3.4.2

Configuration

No config needed apart from --dialect oracle

Are you willing to work on and submit a PR to address the issue?

• Yes I am willing to submit a PR!

Code of Conduct

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