MERGE Statement with FILTER

Question

Hello Team, 
I am trying to use a merge statement to merge data from the glue catalog to redshift tabes.
The requirement is to merge records and have a filter clause

For example: Here where the clause does not work 
MERGE INTO target_table USING  WHERE source_table.column = 'value' ON ...

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I also tried using and as a predicate but it merged the record with id 0001230

MERGE INTO TARGET TABLE USING #temp_table src
 ON TARGET.id = src.id  and src.id != '0001230'
WHEN MATCHED THEN UPDATE SET

how should I add a filter in the merge statement?

Answer

Hi,

Currently Redshift MERGE statements do not allow for the source table to be a view, subquery, or CTE (created by a WITH statement). If you need to perform some filtering on the source table before applying the MERGE you will need to create a permanent or temporary table to be used as the source.

Alternatively you can use UPDATE and INSERT statements.

Answer

I would just use a WITH clause before the merge to filter the source table before the merge.

MERGE Statement with FILTER

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