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Error "java.sql.SQLException: Invalid column type: 16" When Calling an PL/SQL Returning a Boolean from JDBC. (Doc ID 1113893.1)

Last updated on OCTOBER 17, 2022

Applies to:

JDBC - Version and later
Information in this document applies to any platform.


A Java application is calling an oracle package function that returns a boolean. When this application is executed, the following error is displayed:

ERROR - Exception in Main : Invalid column type: 16
Error : java.sql.SQLException: Invalid column type: 16

The Java program contains a dynamic statement that uses bind variables, like this:

As seen in the previous code segment, one of the variable types is defined as Boolean, and the getBoolean method is used to retrieve its value


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