Minor: Add Column::from(Tableref, &FieldRef), Expr::from(Column) and Expr::from(Tableref, &FieldRef)
#10178
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alamb
commented
Apr 22, 2024
| @@ -346,6 +348,13 @@ impl From<(Option<&TableReference>, &Field)> for Column { | |||
| } | |||
| } | |||
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| /// Create a column, use qualifier and field name | |||
| impl From<(Option<&TableReference>, &FieldRef)> for Column { | |||
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This is the new API -- the rest of this PR updates the code to use it when possible
comphead
reviewed
Apr 22, 2024
benchmarks/src/tpch/convert.rs
Outdated
| .map(|(qualifier, field)| { | ||
| Expr::Column(Column::from((qualifier, field.as_ref()))) | ||
| }) | ||
| .map(Column::from) |
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can we still use a single map?
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Good call -- I added some more Expr::from impls in c4bc7e3 and now this looks pretty nice
alamb
changed the title
Column::from(Tableref, &FieldRef)Column::from(Tableref, &FieldRef), Expr::from(Column) and Expr::from(Tableref, &FieldRef)
alamb
commented
Apr 22, 2024
| .map(|(qualifier, field)| { | ||
| Expr::Column(Column::from((qualifier, field.as_ref()))) | ||
| }) | ||
| .map(Expr::from) |
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This is now pretty nice I think given @comphead 's suggestion ❤️
andygrove
approved these changes
Apr 22, 2024
haohuaijin
approved these changes
Apr 23, 2024
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Thanks everyone for the reviews ❤️ |
ccciudatu
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to hstack/arrow-datafusion
that referenced
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Apr 26, 2024
…and `Expr::from(Tableref, &FieldRef)` (apache#10178) * Minor: Add `Column::from(Tableref, &FieldRef)` * Add Expr::from() * fix docs * Fix doc test
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Which issue does this PR close?
Follow on to #9595 from @haohuaijin
Rationale for this change
@appletreeisyellow and I noticed this while upgrading IOx -- there are times when the code would like to create
Expr::Columnthat reference each of the columns in a schemaTo do so it would be nice to be able to create a
Columndirectly from a&FieldRefrather than having to to first call.as_ref()on the `FieldRefWhat changes are included in this PR?
Changes:
Column::from(Tableref, &FieldRef)Expr::from(Column)Expr::from(Tableref, &FieldRef)Are these changes tested?
By existing tests
Are there any user-facing changes?