Filter rows in a dataset

Datasets Server provides a /filter endpoint for filtering rows in a dataset.

Currently, only datasets with Parquet exports are supported so Datasets Server can index the contents and run the filter query without downloading the whole dataset.

This guide shows you how to use Datasets Server’s /filter endpoint to filter rows based on a query string. Feel free to also try it out with ReDoc.

The /filter endpoint accepts the following query parameters:

dataset: the dataset name, for example glue or mozilla-foundation/common_voice_10_0
config: the configuration name, for example cola
split: the split name, for example train
where: the filter condition
offset: the offset of the slice, for example 150
length: the length of the slice, for example 10 (maximum: 100)

The where parameter must be expressed as a comparison predicate, which can be:

a simple predicate composed of a column name, a comparison operator, and a value
- the comparison operators are: =, <>, >, >=, <, <=
a composite predicate composed of two or more simple predicates (optionally grouped with parentheses to indicate the order of evaluation), combined with logical operators
- the logical operators are: AND, OR, NOT

For example, the following where parameter value

where=age>30 AND (name='Simone' OR children=0)

will filter the data to select only those rows where the float “age” column is larger than 30 and, either the string “name” column is equal to ‘Simone’ or the integer “children” column is equal to 0.