Alima777 created IOTDB-5496:
-------------------------------

             Summary: Rename VerticallyConcatOperator as 
HorizontallyConcatOperator
                 Key: IOTDB-5496
                 URL: https://issues.apache.org/jira/browse/IOTDB-5496
             Project: Apache IoTDB
          Issue Type: Improvement
            Reporter: Alima777
            Assignee: Alima777


VerticallyConcatOperator is used to horizontally concatenate TsBlocks with the 
same timestamp column. For example,
TsBlock A is:
| Time | ColumnA |
|    1    |     1.0    |
TsBlock B is:
| Time | ColumnB |
|    1    |       2.0    |
After the VerticallyConcatOperator, the result will be:
| Time | ColumnA | ColumnB |
|    1    |       1.0    |     2.0      |

Literally, I think it's a horizontal concatenation. So I suggest rename it as 
HorizontallyConcatOperator.



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