Re: [JDBC] JDBC String to Bool spec

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От Kevin Wooten
Тема Re: [JDBC] JDBC String to Bool spec
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Msg-id 83AB5852-8884-465E-80D8-A49B6CB05A88@me.com
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Ответ на Re: [JDBC] JDBC String to Bool spec  (Kevin Wooten <kdubb@me.com>)
Ответы Re: [JDBC] JDBC String to Bool spec  (Dave Cramer <pg@fastcrypt.com>)
Re: JDBC String to Bool spec  (Dave Cramer <pg@fastcrypt.com>)
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Actually this table isn’t what I’m looking for.  Related to example I provided below, there doesn’t seem to be a list of “acceptable values” when converting a string to a boolean; only that “getBoolean” must support conversion from VARCHAR/CHAR.


On Jan 15, 2017, at 4:29 PM, Kevin Wooten <kdubb@me.com> wrote:

Thanks… is there a reason those tables were dropped from the 4.2 spec PDF?

On Jan 15, 2017, at 4:26 PM, Dave Cramer <pg@fastcrypt.com> wrote:



On 15 January 2017 at 18:20, Kevin Wooten <kdubb@me.com> wrote:
Does anybody know where in the specification it details the required/acceptable conversions from string values to boolean?  I cannot seem to find it in the PDF for 4.2.

I am curious about some of the conversions that are done.  For example, calling “ResultSet.getBoolean” on a text/varchar column with the value “1.0”.  This conversion succeeds because the driver (both pgjdbc & ng) fallback to decoding the column as a double then converting that by testing it “== 1”; which seems valid but questionable since “!= 0” would also be valid, but vastly different.

This is not allowed by Postgres (e.g. “SELECT “1.0”::bool;” results in an error) and I cannot find anything in JDBC as of yet.

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