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alamb merged 1 commit into from
Jul 16, 2026
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docs: add partitioned ClickBench SQL example #23637

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22 changes: 17 additions & 5 deletions benchmarks/README.md
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Expand Up @@ -507,23 +507,35 @@ The runner applies two ClickBench-specific setup steps automatically:
runner enables the parquet `binary_as_string` option so those columns
are read as strings.

If you set up ClickBench manually through SQL, use the same `EventDate`
view pattern:
If you set up ClickBench manually through SQL, register the single-file
dataset as follows:

```sql
CREATE EXTERNAL TABLE hits_raw
STORED AS PARQUET
LOCATION 'benchmarks/data/hits.parquet';
```

For the partitioned dataset, register the directory and enable

@alamb alamb Jul 16, 2026

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I tested this locally and it works great

DataFusion CLI v54.0.0
> CREATE EXTERNAL TABLE hits_raw
STORED AS PARQUET
LOCATION 'benchmarks/data/hits_partitioned'
OPTIONS ('binary_as_string' 'true');
0 row(s) fetched.
Elapsed 0.060 seconds.

> CREATE VIEW hits AS
SELECT * EXCEPT ("EventDate"),
       CAST(CAST("EventDate" AS INTEGER) AS DATE) AS "EventDate"
FROM hits_raw;
0 row(s) fetched.
Elapsed 0.010 seconds.

> SELECT COUNT(*) FROM hits WHERE "AdvEngineID" <> 0;

+----------+
| count(*) |
+----------+
| 630500   |
+----------+
1 row(s) fetched.
Elapsed 0.030 seconds.

`binary_as_string`:

```sql
CREATE EXTERNAL TABLE hits_raw
STORED AS PARQUET
LOCATION 'benchmarks/data/hits_partitioned'
OPTIONS ('binary_as_string' 'true');
```

After registering either dataset as `hits_raw`, create the `hits` view with
the required `EventDate` conversion:

```sql
CREATE VIEW hits AS
SELECT * EXCEPT ("EventDate"),
CAST(CAST("EventDate" AS INTEGER) AS DATE) AS "EventDate"
FROM hits_raw;
```

For the partitioned dataset, use `benchmarks/data/hits_partitioned` and
add `OPTIONS ('binary_as_string' 'true')` to the external table statement.

From the repository root, download data and run the default ClickBench
queries against the single parquet file:

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