Details
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New Feature
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Status: Closed
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Major
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Resolution: Implemented
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None
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Description
Add a FilterableTableSource interface for TableSource implementations which support filter push-down.
The interface could look as follows
def trait FilterableTableSource {
// returns unsupported predicate expression
def setPredicate(predicate: Expression): Expression
}
In addition we need Calcite rules to push a predicate (or parts of it) into a TableScan that refers to a FilterableTableSource. We might need to tweak the cost model as well to push the optimizer in the right direction.
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