DML Handler for update - need help

Question

Hi,
I am trying a simple DML handler to INSERT all the column values in a target table (CHANNELS_DML)..which are sourced from an updated table (CHANNEL). Both of these tables are in the same database.
Here is the procedure I'm using for this purpose..
+++++++++++++++++
CREATE OR REPLACE PROCEDURE chn_dml_handler(in_any IN ANYDATA) IS
lcr SYS.LCR$_ROW_RECORD;
rc PLS_INTEGER;
command VARCHAR2(30);
old_values SYS.LCR$_ROW_LIST;
old_pk_val sys.anydata;
new_values SYS.LCR$_ROW_LIST := NULL;
BEGIN
rc := in_any.GETOBJECT(lcr);
command := lcr.GET_COMMAND_TYPE;
old_values := lcr.GET_VALUES('old');
new_values := lcr.GET_VALUES('new');
IF command = 'UPDATE' THEN
old_values := lcr.GET_VALUES('old','y');
lcr.SET_VALUES('new', old_values);
lcr.ADD_COLUMN('new', 'TIMESTAMP', ANYDATA.ConvertDate(SYSDATE));
lcr.ADD_COLUMN('new', 'OPERATION', ANYDATA.Convertvarchar2('UPDATE'));
lcr.SET_COMMAND_TYPE('INSERT');
lcr.SET_OBJECT_NAME('CHANNELS_DML');
ELSIF command = 'DELETE' THEN
lcr.SET_COMMAND_TYPE('INSERT');
lcr.SET_OBJECT_NAME('CHANNELS_DML');
lcr.SET_VALUES('new', old_values);
lcr.SET_VALUES('old', NULL);
lcr.ADD_COLUMN('new', 'TIMESTAMP', ANYDATA.ConvertDate(SYSDATE));
lcr.ADD_COLUMN('new', 'OPERATION', ANYDATA.Convertvarchar2('DELETE'));
ELSE
lcr.SET_COMMAND_TYPE('INSERT');
lcr.SET_OBJECT_NAME('CHANNELS_DML');
lcr.ADD_COLUMN('new', 'TIMESTAMP', ANYDATA.ConvertDate(SYSDATE));
lcr.ADD_COLUMN('new', 'OPERATION', ANYDATA.Convertvarchar2('INSERT'));
END IF;
lcr.EXECUTE(true);
END;
++++++++++++++++++++
INSERT, DELETE are working fine. However, when it comes to UPDATE I encounter "ORA-23605: invalid value "" for STREAMS parameter command_type".
Would appreciate, if you can point me to any missed steps!
Both source, target tables have the pk and supplemental logging is enabled for all the source tbl columns. (BTW, is it mandatory to enable supplemental logging ?)
Thanks,
Sharas

Answer 1

You need to put this statement into IF 'UPDATE'
lcr.SET_VALUES('old', NULL);
old values in case of INSERT should be NULL.
You may want to use case instead of IF ELSEIF...
You might also have problems with LOBS... LOBs are not covered by this code.