Add Outer Join Support #40
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Allow tagging bits for outer join marking in the hash table. Prepare an iterator that can later be used by the HashTableSource.
This commit wraps up outer join support and support for TPC-H Q13. We allow inducing a continuation pipeline after the outer join. That continuation pipeline starts with a HashTableSource for the outer join, and then feeds into the remaining suboperators of the pipeline.
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Only let one thread produce the non-matched tuples.
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This PR extends InkFuse with support for left outer joins. We use a dedicates marking bit in the hash table tags to indicate whether a tuple found a join partner.
We then add an additional pipeline that reads from the non-matched tuples in the hash table and produces the null tuples.
We also add support for TPC-H Q13, giving us support for all queries from the original ROF paper now.