21 lines
541 B
Python
21 lines
541 B
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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from duckdb import FunctionExpression
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from narwhals._duckdb.utils import lit
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if TYPE_CHECKING:
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from narwhals._duckdb.expr import DuckDBExpr
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class DuckDBExprStructNamespace:
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def __init__(self, expr: DuckDBExpr) -> None:
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self._compliant_expr = expr
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def field(self, name: str) -> DuckDBExpr:
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return self._compliant_expr._with_callable(
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lambda _input: FunctionExpression("struct_extract", _input, lit(name))
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).alias(name)
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