Read Primitives — Struct Construction

Read Primitives benchmark · all Read Primitives queries

Construct struct from columns

Representative SQL

Rendered for DataFusion with default parameters.

SELECT
  c_custkey,
  STRUCT(c_name, c_address, c_phone) AS contact_info,
  c_acctbal
FROM customer
WHERE
  c_nationkey = 1
ORDER BY
  c_custkey
LIMIT 100

Representative DataFrame

Expression family (Polars, PySpark, DataFusion), default parameters.

def struct_construction_expression_impl(ctx: DataFrameContext) -> Any:
    import polars as pl

    return (
        ctx.get_table("customer")
        .native.filter(pl.col("c_nationkey") == 1)
        .sort("c_custkey")
        .select(
            "c_custkey",
            pl.concat_list([pl.col("c_name"), pl.col("c_address"), pl.col("c_phone")]).alias("contact_info"),
            "c_acctbal",
        )
        .limit(100)
    )

Get the exact query for your run

The blocks above are representative. To get the precise statement a specific platform runs at a specific scale, substitute your own values:

from benchbox import ReadPrimitives

bench = ReadPrimitives(scale_factor=0.01)            # your scale factor
queries = bench.get_queries(dialect="datafusion")   # your platform's dialect; drop dialect= for native SQL
print(queries['struct_construction'])

For the DataFrame form:

from benchbox.core.query_catalog import get_dataframe_render

print(get_dataframe_render('read_primitives', 'struct_construction', family="expression").source)  # or family="pandas"

Source

Query text: benchbox/core/read_primitives/queries.py