parquet_decode

Available in: Cloud, Self-Managed

Decodes Parquet files into a batch of structured messages.

Introduced in version 4.4.0.

# Configuration fields, showing default values
label: ""
parquet_decode:
  handle_logical_types: v1

Fields

handle_logical_types

Set to v2 to enable enhanced decoding of logical types, or keep the default value (v1) to ignore logical type metadata when decoding values.

In Parquet format, logical types are represented using standard physical types along with metadata that provides additional context. For example, UUIDs are stored as a FIXED_LEN_BYTE_ARRAY physical type, but the schema metadata identifies them as UUIDs. By enabling v2, this processor uses the metadata descriptions of logical types to produce more meaningful values during decoding.

For backward compatibility, this field enables logical-type handling for the specified Parquet format version, and all earlier versions. When creating new pipelines, Redpanda recommends that you use the newest documented version.

Type: string

Default: v1

Options:

Option Description

v1

No special handling of logical types.

v2

Logical types with enhanced decoding:

  • TIMESTAMP: Decodes as an RFC3339 string describing the time. If the isAdjustedToUTC flag is set to true in the Parquet file, the time zone is set to UTC. If the flag is set to false, the time zone is set to local time.

  • UUID: Decodes as a string: 00112233-4455-6677-8899-aabbccddeeff.

 
 # Examples

handle_logical_types: v2

Examples

Reading Parquet files from AWS S3

In this example, a pipeline consumes Parquet files as soon as they are uploaded to an AWS S3 bucket. The pipeline listens to an SQS queue for upload events, and uses the to_the_end scanner to read the files into memory in full. The parquet_decode processor then decodes each file into a batch of structured messages. Finally, the data is written to local files in newline-delimited JSON format.

input:
  aws_s3:
    bucket: TODO
    prefix: files/
    scanner:
      to_the_end: {}
    sqs:
      url: TODO
  processors:
    - parquet_decode:
        handle_logical_types: v2
output:
  file:
    codec: lines
    path: './files/${! meta("s3_key") }.jsonl'