Hi
I noticed that when casting a string to boolean value with input 'of' it still
cast it to 'f'. I think with 'of', it should give an error because 'off' is the
expected candidate. This may not be intended so I made a simple patch to
address this.
```
postgres=# select cast('of' as boolean);
bool
------
f
(1 row)
```
Cary Huang
-------------
HighGo Software Inc. (Canada)
mailto:cary.hu...@highgo.ca
http://www.highgo.ca
0001-boolean-type-cast-fix.patch
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