Oracle SQL job error "Invalid column type: getString/getNString not implemented for class oracle.jdbc.driver.T4CBlobAccessor"
Article ID: 88138
CA Automic Workload Automation - Automation Engine
Error Message : Invalid column type: getString/getNString not implemented for class oracle.jdbc.driver.T4CBlobAccessor
A SQL select statement to an Oracle Database is executed in a SQL-Job, similar to the example below (marked in green). The table contains a BLOB (Binary Large Object) field. This results in the above error (marked in red).
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OS Version: N/A
Cause type: By design Root Cause: Blob data is not supported and needs to be converted to a string within the SQL. As blob can get several GB, displaying all this data in an SQL-job could cause the system to hang.
Use DBMS_lob function similar to the one shown below. In this example the column ABLOB_CONTENT has a data type of BLOB
select ABLOB_AH_IDNR , ABLOB_KEY , dbms_lob.substr(ABLOB_CONTENT, 2000, 1) from ablob