KiranVelumuri commented on PR #5651:
URL: https://github.com/apache/hive/pull/5651#issuecomment-2675265471
I've analysed how it's working in the case of CBO=true, and tried to
replicate the same for CBO=false.
Sample case analysed:
```
CBO true
TableScanOperator TS[0]
SelectOperator SEL[1] (_col0:
array<struct<col1:string,col2:int,col3:decimal(3,2)>>|{null}_c1) size = 1
UDTFOperator UDTF[2] (col1: string|{$hdt$_0}col1,col2:
int|{$hdt$_0}col2,col3: decimal(3,2)|{$hdt$_0}col3) size = 3
SelectOperator SEL[3] (_col0: string|{null}_col0,_col1:
int|{null}_col1,_col2: decimal(3,2)|{null}_col2) size = 3
FileSinkOperator FS[4]
```
```
CBO false
TableScanOperator TS[0]
SelectOperator SEL[1] (_col0:
array<struct<col1:string,col2:int,col3:decimal(3,2)>>|{null}_c1) size = 1
UDTFOperator UDTF[2] (col1: string|{null}col1,col2: int|{null}col2,col3:
decimal(3,2)|{null}col3) size = 3
FileSinkOperator FS[3]
```
```
CBO false (Updated in this PR)
TableScanOperator TS[0]
SelectOperator SEL[1] (_col0:
array<struct<col1:string,col2:int,col3:decimal(3,2)>>|{null}_c1) size = 1
UDTFOperator UDTF[2] (col1: string|{null}col1,col2: int|{null}col2,col3:
decimal(3,2)|{null}col3) size = 3
SelectOperator SEL[3] (_col0: string|{null}_col0,_col1:
int|{null}_col1,_col2: decimal(3,2)|{null}_col2) size = 3
FileSinkOperator FS[4]
```
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