marchpure

[WIP] Fix Show Schema Issue

4

### Why is this PR needed? ### What changes were proposed in this PR? ### Does this PR introduce any user interface change? - No - Yes. (please explain the...

[WIP] drop table issue

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### Why is this PR needed? ### What changes were proposed in this PR? ### Does this PR introduce any user interface change? - No - Yes. (please explain the...

[CARBONDATA-4176] Fail to achive AK/SK when create table on S3/OBS

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### Why is this PR needed? Due to the failure to obtain aksk, create table operation failed. ### What changes were proposed in this PR? Change "session.sparkContext.hadoopConfiguration" to "session.sessionState.newHadoopConf()" ###...

[CARBONDATA-4083] Refactor Update and Support Update Atomicity

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### Why is this PR needed? Currently, we will modify tablestatus file for serveral times in the update flow. In total 4 tablestauts write ops destoy the Atomicity to a...

[WIP] Make TableStatus/UpdateTableStatus/SegmentFile Smaller

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### Why is this PR needed? ### What changes were proposed in this PR? ### Does this PR introduce any user interface change? - No - Yes. (please explain the...

[CARBONDATA-4063] Refactor getBlockId and getShortBlockId functions

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### Why is this PR needed? Currently, getBlockId and getShortBlockId functions are too complex and unreadable, which can be more simpler and readable. ### What changes were proposed in this...

[CARBONDATA-4045] Add TPCDS TestCase for Spark on CarbonData Integration Test

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### Why is this PR needed? There is no TPC-DS TestCases in the current source code. It is difficult to debug TPC-DS on small dataset. Also, TPC-DS TestCase would help...

[CARBONDATA-3702] Clean temp index files in parallel in merge index flow

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### Why is this PR needed? Currently, Cleaning temp index files in the mergeindex flow takes a lot of time, sometimes it will take 2~3 mins, which should be optimized...