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Committer:
Sergey Petrunya
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Date:
2012-01-19 22:11:53 UTC
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Revision ID:
psergey@askmonty.org-20120119221153-vrvfy11wccbr47ql
BUG#912513: Wrong result (missing rows) with join_cache_hashed+materialization+semijoin=on
- equality substitution code was geared towards processing WHERE/ON clauses.
that is, it assumed that it was doing substitions on the code that
= wasn't attached to any particular join_tab yet
= was going to be fed to make_join_select() which would take the condition
apart and attach various parts of it to tables inside/outside semi-joins.
- However, somebody added equality substition for ref access. That is, if
we have a ref access on TBL.key=expr, they would do equality substition in
'expr'. This possibility wasn't accounted for.
- Fixed equality substition code by adding a mode that does equality
substition under assumption that the processed expression will be
attached to a certain particular table TBL.