feat(unparser): adding alias for table scan filter in sql unparser #12453
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demetribu
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Sep 13, 2024
goldmedal
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Thanks @Lordworms working on this. Overall looks good to me. Just leave some suggestions.
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| fn test_alias_pushdown() -> Result<()> { | ||
| let schema = Schema::new(vec![ | ||
| Field::new("id", DataType::Int64, false), | ||
| Field::new("age", DataType::Int64, false), | ||
| ]); |
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I'm not sure if adding the unparsing test here is appropriate. 🤔 Typically, we add unparse-related tests in datafusion/sql/tests/cases/plan_to_sql.rs
I left a disabled test for this issue in the previous PR #12158. I guess we can just enable it and remove this test.
datafusion/sql/src/unparser/plan.rs
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| .reduce(|acc, expr_result| match (acc, expr_result) { | ||
| (Ok(acc_expr), Ok(expr)) => Ok(acc_expr.and(expr)), | ||
| (Err(e), _) | (_, Err(e)) => Err(e), | ||
| }) |
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We can simplify here like this
Suggested change
| .reduce(|acc, expr_result| match (acc, expr_result) { | |
| (Ok(acc_expr), Ok(expr)) => Ok(acc_expr.and(expr)), | |
| (Err(e), _) | (_, Err(e)) => Err(e), | |
| }) | |
| .reduce(|acc, expr_result| { | |
| acc.and_then(|acc_expr| { | |
| expr_result.map(|expr| acc_expr.and(expr)) | |
| }) | |
| }) |
|
I think @goldmedal 's comments are all great. Once those have been addressed this PR will be ready to go from my persective. Thank you @Lordworms @goldmedal and @dmitrybugakov |
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@goldmedal @alamb @dmitrybugakov Thanks for the review! |
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alamb
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* init (apache#12453) * Fix unparse table scan with the projection pushdown (apache#12534) * unparse the projection base on the source schema * refactor and enhance the test * Fix unparsing OFFSET (apache#12539) * Unparse Sort with pushdown limit to SQL string (apache#12873) * unparse Sort with push down limit * cargo fmt * set query limit directly * Unparse `SubqueryAlias` without projections to SQL (apache#12896) * change pub function comment to doc * unparse subquery alias without projections * fix tests * rollback the empty line * rollback the empty line * exclude the table_scan with pushdown case * fmt and clippy * simplify the ast to string and remove unused debug code * enhance unparsing plan with pushdown to avoid unnamed subquery (apache#13006) * Update --------- Co-authored-by: Lordworms <[email protected]> Co-authored-by: Jax Liu <[email protected]> Co-authored-by: Justus Flerlage <[email protected]>
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Which issue does this PR close?
Closes #12368
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What changes are included in this PR?
Are these changes tested?
Are there any user-facing changes?