Optimizer Does not use Spatial Domain Index for SQL When NLS_comp=linguistic, NLS_sort=binary_ci
(Doc ID 1617278.1)
Last updated on JANUARY 03, 2020
Applies to:Oracle Spatial and Graph - Version 184.108.40.206 and later
Information in this document applies to any platform.
On a table with column of type MDSYS.SDO_GEOMETRY, a spatial index is created in a session with NLS_comp=linguistic and NLS_sort=binary_ci
As a results a query from a session with NLS_comp=linguistic and NLS_sort=binary_ci in the os environment uses a full table scan.
But the same query from a session with standard NLS_comp=binary and NLS_sort=binary in the os environment uses the domain index.
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