Parquet File Input

Description

The Parquet File Input transform reads (primitive) values from an Apache Parquet file.

For more information on this see: Apache Parquet.

Options

Notes:

  • To support reading from any location through Apache VFS each file is loaded into memory (one at a time). Make sure to allocate enough memory to allow this.

  • Long values can be de-serialized to Dates if they are EPOC: milliseconds since 1970-01-01 00:00:00.000

  • Parquet Binary fields are considered to be Hop Strings but you can read them as Hop Binary.

  • All input values are passed to the output

  • INT96 is converted to the Hop Binary data type.

OptionDescription

Transform name

Name of the transform this name has to be unique in a single pipeline.

Filename field

Specify the input field. Use a transform like Get File Names to obtain file names. Any supported file location is fine.

Fields

In this table you can specify all the fields you want to obtain from the parquet files as well as their desired Hop output type.

Get fields button

With this button you can select a parquet file from which we’ll read the schema to populate the Fields grid.