On Apr 6, 2010, at 4:40 PM, Tom Lane wrote:

>> I tried this:
>>    try=# create or replace function try() returns void language plperl as $$ 
>>        spi_prepare('select length($1)', 'unknown');
>>    $$;
>>    CREATE FUNCTION
>>    try=# select try();
>>    ERROR:  error from Perl function "try": failed to find conversion 
>> function from unknown to text at line 2.
> 
> Why would you think this is useful, considering that plperl has no
> concept of SQL data types?  Everything you could pass to
> spi_exec_prepared is effectively text, no?

    try=# create or replace function try() returns void language plperl as $$
        spi_prepare('select abs($1)', 'text');
    $$;
    CREATE FUNCTION
    try=# select try();
    ERROR:  error from Perl function "try": function abs(text) does not exist 
at line 2.

Best,

David
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