[CARBONDATA-4280][Doc] Add OVERWRITE keyword explanation in load command #4213
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Build Failed with Spark 2.3.4, Please check CI http://121.244.95.60:12602/job/ApacheCarbonPRBuilder2.3/5908/ |
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Build Failed with Spark 2.4.5, Please check CI http://121.244.95.60:12602/job/ApacheCarbon_PR_Builder_2.4.5/4164/ |
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| @@ -266,7 +281,7 @@ CarbonData DML statements are documented here,which includes: | |||
| numPartitions = total size of input data / splitSize | |||
| ``` | |||
| The default value is 3, and the range is [1, 300]. | |||
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please revert all these changes below in this PR. Space related changes
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OK, I will do it.
| Example: | ||
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| ```sql | ||
| CREATE TABLE carbon_load_overwrite(id int, name string, city string, age int) |
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No need to add example here. Since it is mentioned in syntax, that could be enough
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| * If run on cluster mode, please upload all input files to distributed file system, for example 'hdfs://' for hdfs. | ||
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| * [ OVERWRITE ] : |
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Suggested change
| * [ OVERWRITE ] : | |
| * If the OVERWRITE keyword is used, then it will overwrite the existing data in the table with new data. |
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Why is this PR needed?
CarbonData supports load overwrite now, but no related testcases or documents take care of this feature, except partition tables.
What changes were proposed in this PR?
Add [OVERWRITE] keyword in dml-of-carbondata.md and explain how to use this feature with a simple example.
Does this PR introduce any user interface change?
Is any new testcase added?
JIRA Issue: https://issues.apache.org/jira/browse/CARBONDATA-4280