SQL: Optimisation fixes for conjunction merges (#50703) #50933
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* SQL: Optimisation fixes for conjunction merges This commit fixes the following issues around the way comparisions are merged with ranges in conjunctions: * the decision to include the equality of the lower limit is corrected; * the selection of the upper limit is corrected to use the upper bound of the range; * the list of terms in the conjunction is sorted to have the ranges at the bottom; this allows subsequent binary comarisions to find compatible ranges and potentially be merged away. The end guarantee being that the optimisation takes place irrespective of the order of the conjunction terms in the statement. Some comments are also corrected. * adress review observation on anon. comparator Replace anonymous comparator of split AND Expressions with a lambda. (cherry picked from commit 9828cb1)
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Pinging @elastic/es-search (:Search/SQL) |
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This commit fixes the following issues around the way comparisions are
merged with ranges in conjunctions:
of the range;
the bottom; this allows subsequent binary comarisions to find compatible
ranges and potentially be merged away. The end guarantee being that the
optimisation takes place irrespective of the order of the conjunction
terms in the statement.
Some comments are also corrected.
Replace anonymous comparator of split AND Expressions with a lambda.
(cherry picked from commit 9828cb1)