Read Primitives — String Selective Filter

Read Primitives benchmark · all Read Primitives queries

Exact string equality with high selectivity on varchar column

Representative SQL

Rendered for DataFusion with default parameters.

SELECT
  *
FROM customer
WHERE
  c_name = 'Customer#000001234'

Representative DataFrame

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

def expression_impl(ctx: DataFrameContext) -> Any:
        table = ctx.get_table(table_name)
        if conditions:
            table = table.filter(_expr_combined_filter(ctx, conditions))
        result = table.select(*columns)
        return result.limit(limit) if limit is not None else result

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['filter_string_selective'])

For the DataFrame form:

from benchbox.core.query_catalog import get_dataframe_render

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

Source

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