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RC File Formatter

RC File Formatter

Jun 11, 2024

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Snap type:

Format

 

Description:

This Snap formats the incoming document from the upstream Snaps to the RC (Row columnar) file format used for storing data in an optimized way to answer aggregate queries faster.

  • Expected upstream Snaps: The upstream Snap should output table oriented data with columns and rows.

  • Expected downstream Snaps: The RC File Formatter Snap outputs binary data, so the downstream Snap must be a data output Snap (i.e. File Writer, HDFS Writer, etc.).

 

Prerequisites:

[None]

 

Support and limitations:

Works in Ultra Tasks.

Account: 

Accounts are not used with this Snap. 

 

Views:

Input

This Snap has at most one document input view.

Output

This Snap has at most one document output view.

Error

This Snap has at most one document error view and produces zero or more documents in the view.

Settings

 

 

Label

 

Required. The name for the Snap. You can modify this to be more specific, especially if you have more than one of the same Snap in your pipeline.

Hive Metastore URL

 

 

Hive Metastore URI, such as: thrift://localhost:9083

Example: thrift://hive.metastore.com:9083 u

Default value: [None]

 

Database

 

Database which holds the schema for the outgoing RC File data.

Example: hive_db
 

Default value:  [None]

 

Table

 

Table whose schema should be used for parsing the outgoing RC file data.

Example: hive_tbl
 

Default value:  [None]

 

Column paths

 

Required. Paths where the column values appear in the document.

Example:
    Column Name: Fun
    Column Path: $column_from_input_data
    Column Type: string
 

Default value:  [None]

 

Snap Execution

Select one of the following three modes in which the Snap executes:

  • Validate & Execute: Performs limited execution of the Snap, and generates a data preview during Pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during Pipeline runtime.

  • Execute only: Performs full execution of the Snap during Pipeline execution without generating preview data.

  • Disabled: Disables the Snap and all Snaps that are downstream from it.

Default Value: Execute only
Example: Validate & Execute

Troubleshooting