List List table partitioning on 19c.
Testing an upgrade. Mature code.
Subpartition exchange complaining about ORA-28665: table and partition must
have same compression attribute.
ALTER TABLE x EXCHANGE SUBPARTITION x_p1_sp1 WITH TABLE t_1 INCLUDING INDEXES
WITHOUT VALIDATION
Investigation indicates that mismatch is at index level.
Both sides of the exchange have compressed index i1
For x, index i1 is local, compression = ENABLED, prefix_length = 1
At partition level it says, compression = ENABLED
At subpartition level, within the same partition p1, some subpartitions say
COMPRESSION = ENABLED, others say COMPRESSION=DISABLED (segment_created = NO)
My unreliable memory indicates that this shouldn’t be possible.
When I set up a noddy test case and try and reproduce on both 11gR2 and 19c, I
get consistent COMPRESSION = ENABLED.
How might I have ended up with subpartitions of an index having different
COMPRESSION settings?
I’m sure I’m missing some obvious command but I can’t think.
Just had a left field thought .... that partition and subpartitions with
ENABLED were created BEFORE upgrade, the subpartitions with DISABLED were
added to same partition AFTER upgrade. This isn’t a test I’ve attempted yet....
I should.
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