ParquetSerDe class

A serializer to use for converting data to the Parquet format before storing it in Amazon S3. For more information, see Apache Parquet.

Constructors

ParquetSerDe({int? blockSizeBytes, ParquetCompression? compression, bool? enableDictionaryCompression, int? maxPaddingBytes, int? pageSizeBytes, ParquetWriterVersion? writerVersion})
ParquetSerDe.fromJson(Map<String, dynamic> json)
factory

Properties

blockSizeBytes → int?
The Hadoop Distributed File System (HDFS) block size. This is useful if you intend to copy the data from Amazon S3 to HDFS before querying. The default is 256 MiB and the minimum is 64 MiB. Kinesis Data Firehose uses this value for padding calculations.
final
compression → ParquetCompression?
The compression code to use over data blocks. The possible values are UNCOMPRESSED, SNAPPY, and GZIP, with the default being SNAPPY. Use SNAPPY for higher decompression speed. Use GZIP if the compression ratio is more important than speed.
final
enableDictionaryCompression → bool?
Indicates whether to enable dictionary compression.
final
hashCode → int
The hash code for this object.
no setterinherited
maxPaddingBytes → int?
The maximum amount of padding to apply. This is useful if you intend to copy the data from Amazon S3 to HDFS before querying. The default is 0.
final
pageSizeBytes → int?
The Parquet page size. Column chunks are divided into pages. A page is conceptually an indivisible unit (in terms of compression and encoding). The minimum value is 64 KiB and the default is 1 MiB.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
writerVersion → ParquetWriterVersion?
Indicates the version of row format to output. The possible values are V1 and V2. The default is V1.
final

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toJson() → Map<String, dynamic>
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited