Re: Problem in calling prepare statement from STORED PROCEDURE

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От Rajesh Kumar Mallah
Тема Re: Problem in calling prepare statement from STORED PROCEDURE
Дата
Msg-id 406EB881.3080407@trade-india.com
обсуждение исходный текст
Ответ на Problem in calling prepare statement from STORED PROCEDURE  ("Rajat Katyal" <rajatk@intelesoftech.com>)
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Hi,

Inside a stored procedure EXECUTE runs a dynamic query,


DOCS SAY:

Oftentimes you will want to generate dynamic commands inside your PL/pgSQL functions, that is, commands that will involve different tables or different data types each time they are executed. PL/pgSQL's normal attempts to cache plans for commands will not work in such scenarios. To handle this sort of problem, the EXECUTE statement is provided:

EXECUTE command-string;

 where command-string is an expression yielding a string (of type text) containing the command to be executed. This string is fed literally to the SQL engine.


Really not sure how to execute a named plan inside plpgsql.

Regds
mallah.



Rajat Katyal wrote:
Hi:
 
I prepare the statement for execution as follows:
 
PREPARE query(text) as SELECT count(*) FROM transform_customer_billing where inv_no = $1;
 
The problem is Iam not able to execute this prepare statement from the stored procedure defined. I added the statement to call the prepare statement is: EXECUTE query('100023'). The ERROR it prints : Function query(text) does not exist.
 
Please suggest the solution for this problem.
 
Thanks in advance.
 
Rajat

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