Adds BatchSelectionExecutor #4562
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Signed-off-by: Breezewish <breezewish@pingcap.com>
Signed-off-by: Breezewish <breezewish@pingcap.com>
Signed-off-by: Breezewish <breezewish@pingcap.com>
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| rows_len, | ||
| self.src.schema(), | ||
| &mut src_result.data, | ||
| head_retain_map.as_mut_slice(), |
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It seems we needn't evaluate the left conditions once we meet a false in a row/
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There is a todo for this. More specifically, currently we cannot partially evaluate a column (i.e. only evaluates the cell which remains true in previous filter rounds).
| // The selection executor should always return empty rows. | ||
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| let r = exec.next_batch(1); | ||
| assert_eq!(r.data.rows_len(), 0); |
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Could we use a loop to avoid the repeated code?
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it only repeats for the first 2 call. The third call is different (is_drained == true).
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| // The selection executor should return data as it is. | ||
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| let r = exec.next_batch(1); |
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Maybe compare with which src_exec.next_batch returns will be more clear?
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I wanted to do this, but the result is not cloneable, which makes it impossible to compare.
| /// modification. | ||
| /// | ||
| /// Normally this should be only used in tests. | ||
| pub struct MockExecutor { |
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Could we move it to the mod test?
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I think the name "MockExecutor" already clearly indicates that it is a test facility so that it doesn't need to be "test::MockExecutor".
Signed-off-by: Breezewish <breezewish@pingcap.com>
Signed-off-by: Breezewish <breezewish@pingcap.com>
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Signed-off-by: Breezewish <breezewish@pingcap.com>
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Signed-off-by: Breezewish <breezewish@pingcap.com>
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Signed-off-by: Breezewish <breezewish@pingcap.com>
Signed-off-by: Breezewish <breezewish@pingcap.com>
What have you changed? (mandatory)
This PR adds BatchSelectionExecutor.
Extracted from #3898
What are the type of the changes? (mandatory)
How has this PR been tested? (mandatory)
Unit test