@Jason Hurley
Starting from NiFi-1.7 querydatabasetable processor will allow custom query property
Custom Query | A custom SQL query used to retrieve data. Instead of building a SQL query from other properties, this query will be wrapped as a sub-query. Query must have no ORDER BY statement. Supports Expression Language: true (will be evaluated using variable registry only) |
This will resolve your issue i believe..!!
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If you are not using NiFi-1.7 then possible work around would be using ExecuteSQL processor and storing the state in Distribute cache as described in this link.
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QueryDatabaseTableRecord processor also available starting from NiFi-1.8 version.