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Description

For the tsql dialect the following statement gives a parsing error:

ALTER TABLE #Persons DROP CONSTRAINT IF EXISTS PK_Person;

This is however valid sql code as mentioned in https://learn.microsoft.com/en-us/azure/databricks/sql/language-manual/sql-ref-syntax-ddl-alter-table-drop-constraint

Use case

ALTER TABLE #Persons DROP CONSTRAINT IF EXISTS PK_Person;

should not give a parsing error

Dialect

Tsql

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• Yes I am willing to submit a PR!

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