Folks, I have a standard Oracle 11i applications table (WSH_NEW_DELIVERIES) with a column (NAME) of VARCHAR2(30) data type which stores numeric data. When I run a query like the following against this table, it returns the ORA-01722 error: Select name from WSH_NEW_DELIVERIES where name=1048434; But when I modify the statement and put single-quotes around the numeric value then it runs fine: Select name from WSH_NEW_DELIVERIES where name='1048434'; The statement mentioned above is a simplified test statement to troubleshoot the issue. The predicate implicit conversion information can be seen from DBMS_XPLAN.DISPLAY statement as shown below: PLAN_TABLE_OUTPUT ------------------------------------------------------------------------ -------- ------------------------------------------------------------------------ ------- | Id | Operation | Name | Rows | Bytes | Cost | ------------------------------------------------------------------------ ------- | 0 | SELECT STATEMENT | | 1 | 8 | 6349 | |* 1 | INDEX FULL SCAN | WSH_NEW_DELIVERIES_U2 | 1 | 8 | 6349 | ------------------------------------------------------------------------ ------- Predicate Information (identified by operation id): --------------------------------------------------- PLAN_TABLE_OUTPUT ------------------------------------------------------------------------ -------- 1 - filter(TO_NUMBER("WSH_NEW_DELIVERIES"."NAME")=1048434) Does anyone know why Oracle is returning the error? Any help will be appreciated. Thanks Amir -- //www.freelists.org/webpage/oracle-l