ARRAY datatype not being parsed correctly with Trino dialect

[Kirk Hansen]

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What Happened

I had some SQL making use of the ARRAY type and got some unexpected results. Boiling it down to a simple example:

SELECT ARRAY[ARRAY[1, 2], ARRAY[3, 4]];

returns

== [../query.sql] FAIL                                                                                                                                                                                                                                                                    
L:   1 | P:  21 |  PRS | Line 1, Position 21: Found unparsable section: ', 2'
L:   1 | P:  25 |  PRS | Line 1, Position 25: Found unparsable section: ',
                       | ARRAY[3, 4]'
WARNING: Parsing errors found and dialect is set to 'trino'. Have you configured your dialect correctly?
All Finished 📜 🎉!

Expected Behaviour

SQLFluff should recognize ARRAY as a type and not error out.

Observed Behaviour

SQLFLuff errors out unable to parse a query that works with Trino.

How to reproduce

Create a one-line SQL file called query.sql with the following contents:

SELECT ARRAY[ARRAY[1, 2], ARRAY[3, 4]];

Then run the following command with the latest SQLFluff release:

sqlfluff lint --dialect=trino ../query.sql

Dialect

trino

Version

sqlfluff --version
sqlfluff, version 2.3.5

python --version
Python 3.11.8

Configuration

No configuration file was used. This can be triggered with the default configuration.

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

• I agree to follow this project's Code of Conduct