Improve ergonomics of physical expr lit#2828
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liukun4515 merged 3 commits intoapache:masterfrom Jul 3, 2022
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Jul 2, 2022
| expressions::col("a", &schema)?, | ||
| Operator::Gt, | ||
| expressions::lit(ScalarValue::from(1u32)), | ||
| expressions::lit(1u32), |
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This change shows the point of this PR pretty well
| /// Create a literal expression | ||
| pub fn lit(value: ScalarValue) -> Arc<dyn PhysicalExpr> { | ||
| Arc::new(Literal::new(value)) | ||
| pub fn lit<T: datafusion_expr::Literal>(value: T) -> Arc<dyn PhysicalExpr> { |
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Here is the actual change. It isn't the most beautiful code but I think it is reasonable
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This could also be written slightly more concisely as a match:
let scalar_value = match value.lit() {
Expr::Literal(v) => v,
_ => unreachable!()
};
Codecov Report
@@ Coverage Diff @@
## master #2828 +/- ##
==========================================
- Coverage 85.26% 85.17% -0.09%
==========================================
Files 275 275
Lines 48830 48564 -266
==========================================
- Hits 41633 41366 -267
- Misses 7197 7198 +1
Continue to review full report at Codecov.
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yjshen
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Jul 3, 2022
liukun4515
approved these changes
Jul 3, 2022
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Which issue does this PR close?
Closes #2827
Note this is a 10 line actual code change, and then the tests get much less verbose which is why the diff is so large
Rationale for this change
See #2827
What changes are included in this PR?
Make
litin physical expr easier to useAre there any user-facing changes?
Yes, but they are backwards compatible