"Invalid column type: getString not implemented for class oracle.jdbc.driver.T4CBlobAccessor" When Retrieving BLOBs
(Doc ID 2132601.1)
Last updated on AUGUST 30, 2023
Applies to:
JDBC - Version 11.2.0.1.0 and laterInformation in this document applies to any platform.
Symptoms
Application using JDK 1.5 and 11.2.0.4 ojdbc5.jar connects to 12c database (Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production) and retrieves information from BLOB columns.
The following error is received during its execution:
java.sql.SQLException: Invalid column type: getString not implemented for class oracle.jdbc.driver.T4CBlobAccessor
at oracle.jdbc.driver.Accessor.unimpl(Accessor.java:412)
at oracle.jdbc.driver.BlobAccessor.getString(BlobAccessor.java:335)
at oracle.jdbc.driver.OracleResultSetImpl.getString(OracleResultSetImpl.java:1118)
This application code does not work against 12c database, but it does work against 10g database.
ERROR
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SQLState 99999, Error code 17004: java.sql.SQLException: Invalid column type: getString not implemented for class oracle.jdbc.driver.T4CBlobAccessor
STEPS
-----------------------
The issue can be reproduced at will with the following steps:
1. Retrieve BLOB column through application.
2. The error is received.
Changes
Cause
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In this Document
Symptoms |
Changes |
Cause |
Solution |
References |