Re: BUG #15836: Casting 'of' to boolean type should throw an invalidinput syntax

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От David G. Johnston
Тема Re: BUG #15836: Casting 'of' to boolean type should throw an invalidinput syntax
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Msg-id CAKFQuwZeQKTrv-r=0SrkSn50jHo0WkxjL7mKt0kxm6JYSkT68w@mail.gmail.com
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Ответ на BUG #15836: Casting 'of' to boolean type should throw an invalid input syntax  (PG Bug reporting form <noreply@postgresql.org>)
Ответы Re: BUG #15836: Casting 'of' to boolean type should throw an invalid input syntax  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Wed, Jun 5, 2019 at 2:37 PM PG Bug reporting form <noreply@postgresql.org> wrote:
The following bug has been logged on the website:

Bug reference:      15836
Logged by:          Yuming Wang
Email address:      wgyumg@gmail.com
PostgreSQL version: 12beta1
Operating system:   linux
Description:       

Converting 'of' to a boolean type should throw an invalid input syntax.
Because we said in the documentation that 'of' is not accepted as an input
to the boolean data type:
https://www.postgresql.org/docs/12/datatype-boolean.html
```
postgres=# select cast('of' as boolean);
 bool
------
 f
(1 row)
```

At this point raising a syntax error is undesirable, but the documentation should be modified to match the source code, which does say:

src/utils/adt/bool.c
 * Try to interpret value as boolean value.  Valid values are: true,
 * false, yes, no, on, off, 1, 0; as well as unique prefixes thereof.

The unique prefix part needs to make it to user-facing documentation.

David J.

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