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PERFORM statement inside procedure

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Hi:
 
In postgres documentation its written that if we execute query as PERFORM query inside our stored procedure; then the special variable FOUND is set to true if the query produced at least one row, or false if it produced no rows.
 
But FOUND variable is always returning true even my query is returning 0 records.
 
Please suggest me the solution.
 
Thanks and Regards,
Rajat. 

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