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ORA-12560: TNS:protocol adapter error after successful installation of 18 xe

SullivanKMar 16 2019 — edited Mar 19 2019

Hi,

I installed 18 XE on windows 10, but get this error when I try to login via cmd. I installed it via the installation wizard and left every setting on default. Already tried restarting, uninstalling and reinstalling.

After reading Receive ORA-12560 TNS:protocol adapter error with XE 18c / Windows I tried changing my windows environment settings but did not find any for Oracle, which is weird right?

Also, with Oracle 11xe i was used to having 4 windows services and now I only see two: a recovery service and listener. Is that normal?

thanks,

Sullivan
This post has been answered by SullivanK on Mar 18 2019
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Answer

rqEval can accept non-numeric types as input.

In your example, 'select 1 "Industry" forces a returned numeric value.  It fails because the data returned contains 1 non-numeric column. The output doesn't match the specification in the SQL provided, and an error is returned.

Instead, use cast to return as varchar as follows:

SQL> select * from table(rqEval(

        NULL,

        'select cast(''Industry'' as varchar2(8)) "Industry" from dual',

       'Test'));

Returns:

1 Text

Marked as Answer by 3631507 · Sep 27 2020
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Added on Mar 16 2019
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