Cause
The geometry table does not have a spatial index.
The geometry table does not have a spatial index.
Verify that the geometry table referenced in the spatial operator has a spatial index on it.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/3167910
https://community.oracle.com/message/4216112
https://community.oracle.com/message/3624222
https://community.oracle.com/message/1315443
https://community.oracle.com/message/11113594
https://community.oracle.com/message/10968972
https://community.oracle.com/message/1283963
https://community.oracle.com/message/1196352
https://community.oracle.com/message/1821905
https://community.oracle.com/message/9821223
https://community.oracle.com/message/1230421
https://community.oracle.com/message/1231622
https://community.oracle.com/message/1132513
https://community.oracle.com/message/15540
https://community.oracle.com/message/9575574
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