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Move to prewhere improvement #4405

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merged 13 commits into from
Mar 3, 2019
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For changelog. Remove if this is non-significant change.

Category (leave one):

  • Improvement

Short description (up to few sentences):
Improved heuristics of "move to PREWHERE" optimization.

@alexey-milovidov
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alexey-milovidov commented Feb 15, 2019

Performance test has failed.

  • Never move all requested columns to PREWHERE.

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