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Subject [GitHub] mspielberg opened a new pull request #446: Phoenix 5136
Date Sat, 23 Feb 2019 00:53:45 GMT
mspielberg opened a new pull request #446: Phoenix 5136
   Fixes incorrect treatment of NULL as a stop value in AND expression evaluation. `NULL AND
FALSE` should evaluate to `FALSE`, not `NULL`, so NULL is not a valid stop value. `NULL AND
TRUE` is NULL however, so we need to retain memory of whether a past child evaluated to NULL,
even though it is not a stop value.
   Also optimizes BooleanExpressionFilter to immediately drop the current row and move on
to the next row if the expression evaluates to NULL.
   Supercedes #443.

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