Oracle – NLS_LANG setting for JDBC thin driver

I had a similar problem with the;

ORA-12705: Cannot access NLS data files or invalid environment specified

The ODP.NET dll's or instant client were reading the registry;

HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\NLS_LANG=NA

The value NA caused the error.

This was because I already had a client installation but I wanted to use the oracle instant client via network drive for the a VB.NET app with ODP.NET.

My simple fix in my vb.net solution was for example to adjust the environment for the application via:

Environment.SetEnvironmentVariable("NLS_LANG", 
                    "AMERICAN_AMERICA.WE8MSWIN1252", 
                    EnvironmentVariableTarget.Process)

nb. The Oracle "NLS FAQ" link is no longer valid (2012)

Thank you guys for your answers, It works fine now. The reason was a syntax mistake or the interpretation of my SQL code file with Spring Framefork. When I execute the statements directly by using the execute method of jdbc it works, when I use the Spring functionality for script execution the execution fails. With oracle sql code it seems to be tricky, because if I use hsqldb sql code it works fine.

test-condext.xml:

...
<jdbc:initialize-database data-source="dataSource"
    ignore-failures="DROPS" enabled="${jdbc.enableSqlScripts}">
    <jdbc:script location="${jdbc.initLocation}" />
    <jdbc:script location="${jdbc.dataLocation}" />
</jdbc:initialize-database>
...

schema.sql:

DROP SEQUENCE SEQ_USER;
DROP TABLE "USER" CASCADE CONSTRAINTS;
PURGE TABLE "USER";
CREATE TABLE "USER"
  (
    USER_ID          NUMBER(10) NOT NULL,
    CREATOR_USER_FK  NUMBER(10) NOT NULL,
    PRIMARY KEY (USER_ID)
  );
ALTER TABLE "USER" ADD CONSTRAINT FK_USER_CUSER FOREIGN KEY (CREATOR_USER_FK) REFERENCES "USER" (USER_ID);
CREATE SEQUENCE SEQ_USER START WITH 1 INCREMENT BY 1;
CREATE TRIGGER "USER_ID_SEQ_INC" BEFORE
  INSERT ON "USER" FOR EACH ROW
  WHEN (new.USER_ID IS NULL)
BEGIN
  SELECT SEQ_USER.nextval
  INTO :new.USER_ID
  FROM DUAL;
END;
/
ALTER TRIGGER "USER_ID_SEQ_INC" ENABLE;

This works fine! Its important to remove ; at the end of statements excepts the trigger statement!!!

@Before
public void executeSomeSql() {
    Connection c;
    try {
        c = dataSource.getConnection();
        c.createStatement()
                .execute("CREATE TABLE \"USER\" (USER_ID NUMBER(10) NOT NULL, CREATOR_USER_FK NUMBER(10) NOT NULL, PRIMARY KEY (USER_ID))");
        c.createStatement()
                .execute("CREATE SEQUENCE SEQ_USER START WITH 1 INCREMENT BY 1");
        c.createStatement()
                .execute("CREATE OR REPLACE TRIGGER \"USER_ID_SEQ_INC\" BEFORE INSERT ON \"USER\" FOR EACH ROW WHEN (new.USER_ID IS NULL) BEGIN SELECT SEQ_USER.nextval INTO :new.USER_ID FROM DUAL; END;");
    } catch (SQLException e) {
        logger.debug(e);
    }
}