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Register get_field by default #11959

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Aug 14, 2024
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Register get_field by default #11959

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1 change: 1 addition & 0 deletions datafusion/functions/src/core/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ pub fn functions() -> Vec<Arc<ScalarUDF>> {
nvl2(),
arrow_typeof(),
named_struct(),
get_field(),
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It might help to add the context of why this function is exported. Perhaps something like

Suggested change
get_field(),
// Note most users invoke `get_field` indirectly via field access syntax
// like `my_struct_col['field_name']` results in a call to `get_field(my_struct_col, "field_name")`
// It is also exposed directly for use cases such as serializing / deserializing plans with
// the field access desugared to calls to `get_field`
get_field(),

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Added in follow on PR: #11996

coalesce(),
]
}
8 changes: 8 additions & 0 deletions datafusion/sqllogictest/test_files/struct.slt
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Expand Up @@ -72,6 +72,14 @@ select struct(a, b, c)['c1'] from values;
2.2
3.3

# explicit invocation of get_field
query R
select get_field(struct(a, b, c), 'c1') from values;
----
1.1
2.2
3.3

# struct scalar function #1
query ?
select struct(1, 3.14, 'e');
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