View Source

NOTE: The listed in this page reflect the raw data type of the converted column. Depending on the contents of the column, the Transformer Page may re-infer a different data type, when a dataset using this type of source is loaded.

Import

NOTE: does not support ingest of Parquet files with nested values, which can occur for Map or Object data types.

Parquet Data Type		Notes
STRING	String
INT	Integer
DECIMAL	Decimal
DATE	Datetime
TIME	Datetime
TIMESTAMP	Datetime
LIST	Array
MAP	Object

Limitations on import:

The Parquet data format supports the use of row groups for organizing chunks of data. This row grouping is helpful for processing across distributed systems.

places limitations on the volume of data that can be displayed in the browser. By default, these limits are set to 10 MB.

If Parquet row groups are greater than 10 MB:

You cannot preview data from the file before import.
When a Parquet-based dataset is loaded in the Transformer page, the screen may be blank.
Tip: You can select a quick scan random sample or create a new sample from inside the Transformer page. The sample is displayed normally.

Other product functions work as expected with Parquet format.

Export

On export, are exported to their corresponding Parquet types, with the following specific mappings:

	Parquet Data Type	Notes
Boolean	BOOLEAN
Integer	INT64
Decimal	DOUBLE
String	BYTE_ARRAY (STRING)

The fallback data type on export is BYTE_ARRAY (STRING).