| From: | Thomas Kellerer <spam_eater(at)gmx(dot)net> |
|---|---|
| To: | pgsql-jdbc(at)postgresql(dot)org |
| Subject: | Re: JDBC String to Bool spec |
| Date: | 2017-01-16 08:59:24 |
| Message-ID: | o5i217$tou$1@blaine.gmane.org |
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| Lists: | pgsql-jdbc |
Mark Rotteveel schrieb am 16.01.2017 um 09:37:
> As far as I know the JDBC spec defers to the SQL standard
> specification for this. Unfortunately I don't have a copy handy to
> check how the SQL standard defines it.
<boolean value expression> ::=
<boolean term>
| <boolean value expression> OR <boolean term>
<boolean term> ::=
<boolean factor>
| <boolean term> AND <boolean factor>
<boolean factor> ::=
[ NOT ] <boolean test>
<boolean test> ::=
<boolean primary> [ IS [ NOT ] <truth value> ]
<truth value> ::=
TRUE
| FALSE
| UNKNOWN
<boolean primary> ::=
<predicate>
| <boolean predicand>
<boolean predicand> ::=
<parenthesized boolean value expression>
| <nonparenthesized value expression primary>
<parenthesized boolean value expression> ::=
<left paren> <boolean value expression> <right paren>
so it boils down to
<truth value> ::=
TRUE
| FALSE
| UNKNOWN
as far as I can tell.
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