Implement tree explain for HashJoinExec
#15079
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2010YOUY01
reviewed
Mar 8, 2025
| let on = self | ||
| .on | ||
| .iter() | ||
| .map(|(c1, c2)| format!("({}, {})", c1, c2)) |
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I think formatting this join condition as 'c1 = c1' is easier to understand.
Maybe also concat multiple join condition with '\n' instead of ',' ?
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In the render tree, each line is parsed to extract key and value. If we add '\n' in the value, it will be treated as a new line.
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c1 = c1 is clearer than before! 👍
alamb
approved these changes
Mar 8, 2025
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Thank you @irenjj adn @2010YOUY01
I have some small suggestions but I don't think they are necessary
| .join(", "); | ||
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| writeln!(f, "join_type={:?}", self.join_type)?; | ||
| writeln!(f, "on=[{}]", on) |
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I recommend
- we remove
[and] - don't print
join_typeif the type isInner
| @@ -519,6 +534,51 @@ physical_plan | |||
| 17)│ format: arrow │ | |||
| 18)└───────────────────────────┘ | |||
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| # Query with hash join. | |||
| query TT | |||
| explain select * from table1 inner join table2 on table1.int_col = table2.int_col and table1.string_col = table2.string_col; | |||
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Recommend testing outer join here:
Suggested change
| explain select * from table1 inner join table2 on table1.int_col = table2.int_col and table1.string_col = table2.string_col; | |
| explain select * from table1 outer inner join table2 on table1.int_col = table2.int_col and table1.string_col = table2.string_col; |
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Thanks again @irenjj |
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Which issue does this PR close?
treeexplain forHashJoinExec#15078Rationale for this change
What changes are included in this PR?
Are these changes tested?
Are there any user-facing changes?