One additional note:
Where clause | Oracle | PostgreSQL | MySQL
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WHERE (a1, b1) = ( 1, 1 ) | Fail | Pass | Pass
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WHERE (a1, b1) IN ( ( 1, 1 ), ( 2, 2 ) ) | Pass | Pass | Pass
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WHERE (a1, b1) = ( SELECT 1, 1 FROM dual ) | Pass | Pass (not DUAL) | Pass
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WHERE (a1, b1) IN ( SELECT 1, 1 FROM dual ) | Pass | Pass (not DUAL) | Pass
Currently Dialect#supportsRowValueConstructorSyntaxInInList() is overridden only by Oracle
dialect and
Dialect#supportsRowValueConstructorSyntax() by MySQL and PostgreSQL.
Should we assume that Dialect#supportsRowValueConstructorSyntax() corresponds to first row
in the table above and
Dialect#supportsRowValueConstructorSyntaxInInList() to the rest? If so, MySQL and
PostgreSQL dialects would need to be updated.
Regards,
Lukasz