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https://issues.apache.org/jira/browse/CALCITE-1845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-1845.
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Resolution: Fixed
Fix Version/s: 1.14.0
Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/f4746523.
The fix is null-safe (i.e. returns unknown, as required by the standard, in
certain situations where the sub-query returns null values) and could be made a
bit more efficient if certain columns have NOT NULL constraints (we could make
do with one count rather than two, because the counts will always be the same).
> Quantified comparison predicates (SOME, ANY, ALL)
> -------------------------------------------------
>
> Key: CALCITE-1845
> URL: https://issues.apache.org/jira/browse/CALCITE-1845
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Labels: phoenix
> Fix For: 1.14.0
>
>
> Support quantified comparison predicates (SOME, ANY, ALL), per the SQL
> standard.
> {quote}
> <comp op> ::=
> <equals operator>
> \| <not equals operator>
> \| <less than operator>
> \| <greater than operator>
> \| <less than or equals operator>
> \| <greater than or equals operator>
> <quantifier> ::=
> <all>
> \| <some>
> <all> ::= ALL
> <some> ::=
> SOME
> \| ANY
> The result of “R <comp op> <quantifier> T” is derived by the application of
> the implied <comparison predicate> “R <comp op> RT” to every row RT in T.
> Case:
> * a) If T is empty or if the implied <comparison predicate> is True for every
> row RT in T, then “R <comp op> <all> T” is True.
> * b) If the implied <comparison predicate> is False for at least one row RT
> in T, then “R <comp op> <all> T” is False.
> * c) If the implied <comparison predicate> is True for at least one row RT in
> T, then “R <comp op> <some> T” is True.
> * d) If T is empty or if the implied <comparison predicate> is False for
> every row RT in T, then “R <comp op> <some> T” is False.
> * e) If “R <comp op> <quantifier> T” is neither True nor False, then it is
> Unknown.
> {quote}
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