marchpure opened a new pull request #4185:
URL: https://github.com/apache/carbondata/pull/4185
### Why is this PR needed?
The rename command will list partitions for the table, but the partitions
information is not actually used. If the table has hundreds of thousands
partitions, the performance of rename table will degrade a lot
### What changes were proposed in this PR?
avoid list partitions in RENAMETO command.
### Does this PR introduce any user interface change?
- No
### Is any new testcase added?
- No
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