Read Primitives — Top-N Query

Read Primitives benchmark · all Read Primitives queries

Top-N query with ORDER BY and LIMIT

Representative SQL

Rendered for DataFusion with default parameters.

SELECT
  l_orderkey,
  l_partkey,
  l_extendedprice
FROM lineitem
ORDER BY
  l_extendedprice DESC
LIMIT 10

Representative DataFrame

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

def expression_impl(ctx: DataFrameContext) -> Any:
        result = _select_sort_limit(ctx.get_table(table_name), cols, sort, desc, distinct=distinct)
        return _limit(result, limit)

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['topn'])

For the DataFrame form:

from benchbox.core.query_catalog import get_dataframe_render

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

Source

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