Monty 07df2029a3 Adjust cost for re-creating a row from the JOIN CACHE ...

Creating a record from the join cache is faster than getting a row from
the engine (less and simpler code to execute).

Added JOIN_CACHE_ROW_COPY_COST_FACTOR (0.5 for now) as the factor to
take this into account. This is multiplied with ROW_COPY_COST.

Other things:
- Added cost of copying rows to hash join, similar to join_cache joins.

2023-02-02 22:58:52 +03:00

1.0 MiB

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