public static interface LookupTableSource.LookupContext extends DynamicTableSource.Context
It offers utilities by the planner for creating runtime implementation with minimal dependencies to internal data structures.
Methods should be called in
instances that are
Serializable can be directly passed into the runtime
|Modifier and Type||Method and Description|
Returns an array of key index paths that should be used during the lookup.
For example, given a table with data type
ROW < i INT, s STRING, r ROW < i2
INT, s2 STRING > >, this method would return
[, [2, 1]] when
s2 are used for performing a lookup.
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