H2ODB — Count

H2ODB benchmark · all H2ODB queries

Basic COUNT(*) full table scan

Representative SQL

Rendered for DataFusion with default parameters.

SELECT
  COUNT(*) AS count
FROM trips

Representative DataFrame

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

def q1_expression_impl(ctx: DataFrameContext) -> Any:

    trips = ctx.get_table("trips")
    col = ctx.col
    return trips.select(col("vendor_id").count().alias("count"))

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 H2ODB

bench = H2ODB(scale_factor=0.01)            # your scale factor
queries = bench.get_queries(dialect="datafusion")   # your platform's dialect; drop dialect= for native SQL
print(queries['Q1'])

For the DataFrame form:

from benchbox.core.query_catalog import get_dataframe_render

print(get_dataframe_render('h2odb', 'Q1', family="expression").source)  # or family="pandas"

Source

Query text: benchbox/core/h2odb/queries.py