Re: Prepared statements and unknown types

On 30 September 2010 14:36, Igor Neyman <ineyman@perceptron.com> wrote:
>> -----Original Message-----
>> From: Thom Brown [mailto:thom@linux.com]
>> Sent: Wednesday, September 29, 2010 2:08 PM
>> To: PGSQL Mailing List
>> Subject: Prepared statements and unknown types
>>
>> Could someone explain why the following doesn't work?
>>
>> test=# PREPARE meow(unknown) AS
>> test-# SELECT $1 as meow;
>> ERROR:  could not determine data type of parameter $1
>>
>> The problem is that using PDO in PHP, prepared statements
>> aren't possible if values are used instead of columns in the
>> select list.
>>
>> This appears to be allowed for MySQL and SQL Server.
>
> Sorry, for being late to this conversation.
> Possibly it works for SQL Server, because SS has SQL_VARIANT data type
> (kind of "anytype").

Thanks for the info Igor.  It's not really going to be a big issue,
just something we'll have to bear in mind.

--
Thom Brown
Twitter: @darkixion
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Registered Linux user: #516935