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# Licensed under the Apache License, Version 2.0 (the "License");
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#
#     http://www.apache.org/licenses/LICENSE-2.0
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"""
BigFrames -> Polars compilation for the operations in bigframes.operations.generic_ops.

Please keep implementations in sequential order by op name.
"""

from __future__ import annotations

from typing import TYPE_CHECKING

import bigframes_vendored.constants

import bigframes.core.compile.polars.compiler as polars_compiler
from bigframes.operations import struct_ops

if TYPE_CHECKING:
    import polars as pl


@polars_compiler.register_op(struct_ops.StructFieldOp)
def struct_field_op_impl(
    compiler: polars_compiler.PolarsExpressionCompiler,
    op: struct_ops.StructFieldOp,  # type: ignore
    input: pl.Expr,
) -> pl.Expr:
    if isinstance(op.name_or_index, str):
        name = op.name_or_index
    else:
        raise NotImplementedError(
            "Referencing a struct field by number not implemented in polars compiler. "
            f"{bigframes_vendored.constants.FEEDBACK_LINK}"
        )

    return input.struct.field(name)
