Answer / guest

Cause: You have specified a materialized view that uses some
combination of the following: joins aggregation filter
conditions in the WHERE clause a remote relation in the FROM
list a SUM(x) function without a corresponding COUNT(x)
function an omitted COUNT(*) aggregate function a MIN() or
MAX() aggregate function in combination with the REFRESH ON
COMMIT option while running in less than 9.0 compatibility mode.

Action: Set your compatibility mode to 9.0 or higher or
restructure the materialized view query.

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