MacLochlainns Weblog

While developing a dynamic SQL example in Oracle 11g that builds a query based on available display columns, I found two interesting error messages. Now instead of noting it for the umpteenth time, I’m documenting it for everybody. The error messages are generated when this DBMS_SQL package’s statement is a SELECT statement, and is executed with either a BLOB, BFILE or CFILE column in the list of returned columns.

26

STATUS := dbms_sql.execute(stmt);

BLOB data type

You get the following error when a column in the query has a BLOB data type. If you alter the query to exclude the column, no error occurs.

BEGIN test('DEMO'); END;
*
ERROR at line 1:
ORA-00932: inconsistent datatypes: expected NUMBER got BLOB
ORA-06512: at "SYS.DBMS_SQL", line 1575
ORA-06512: at "STUDENT.TEST", line 26
ORA-06512: at line 1

BFILE or CFILE data type

You get the following error when a column in the query has a BFILE or CFILE data type. If you alter the query to exclude the column, no error occurs.

BEGIN test('DEMO'); END;
*
ERROR at line 1:
ORA-00932: inconsistent datatypes: expected NUMBER got FILE
ORA-06512: at "SYS.DBMS_SQL", line 1575
ORA-06512: at "STUDENT.TEST", line 26
ORA-06512: at line 1

It’s never a joy to debug the DBMS_SQL package, at least it’s never a joy for me. I hope this helps somebody sort out an issue more quickly.