The following is the SQL-02141 error message, you can learn the cause and solution of the Oracle SQL error.

SQL-02141: Collection descriptor has not been allocated

Cause: An unallocated collection descriptor was referenced in a COLLECTION SET or COLLECTION GET statement.

Solution: Allocate the collection descriptor with the EXEC SQL ALLOCATE statement. e.g. EXEC SQL ALLOCATE :coldesc_p;

Case:

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