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At https://debezium.io/documentation/reference/stable/configuration/storage.html#_internal_schema_history_store_4 there is a reference to a 'Data Exist Query' property. However the property listed there is inconsistent with the code. The property name on the documentation page is: schema.history.internal.jdbc.table.exists.select, whereas the code specifies schema.history.internal.jdbc.table.exists. 

I think it relates to DBZ-8500.