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Scala ParquetProperties类代码示例

本文整理汇总了Scala中org.apache.parquet.column.ParquetProperties的典型用法代码示例。如果您正苦于以下问题:Scala ParquetProperties类的具体用法?Scala ParquetProperties怎么用?Scala ParquetProperties使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了ParquetProperties类的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Scala代码示例。

示例1: RowParquetWriterFn

//设置package包名称以及导入依赖的类
package io.eels.component.parquet

import io.eels.Row
import io.eels.schema.StructType
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.fs.Path
import org.apache.parquet.column.ParquetProperties
import org.apache.parquet.hadoop.api.WriteSupport
import org.apache.parquet.hadoop.{ParquetFileWriter, ParquetWriter}
import org.apache.parquet.schema.MessageType

import scala.math.BigDecimal.RoundingMode.RoundingMode


object RowParquetWriterFn {

  class RowParquetWriterBuilder(path: Path,
                                schema: MessageType,
                                roundingMode: RoundingMode,
                                metadata: Map[String, String])
    extends ParquetWriter.Builder[Row, RowParquetWriterBuilder](path) {
    override def getWriteSupport(conf: Configuration): WriteSupport[Row] = new RowWriteSupport(schema, roundingMode, metadata)
    override def self(): RowParquetWriterBuilder = this
  }

  def apply(path: Path,
            schema: StructType,
            metadata: Map[String, String],
            dictionary: Boolean,
            roundingMode: RoundingMode): ParquetWriter[Row] = {
    val config = ParquetWriterConfig()
    val messageType = ParquetSchemaFns.toParquetMessageType(schema)
    new RowParquetWriterBuilder(path, messageType, roundingMode, metadata)
      .withCompressionCodec(config.compressionCodec)
      .withDictionaryEncoding(dictionary)
      .withDictionaryPageSize(ParquetProperties.DEFAULT_DICTIONARY_PAGE_SIZE)
      .withPageSize(config.pageSize)
      .withRowGroupSize(config.blockSize)
      .withValidation(config.validating)
      .withWriteMode(ParquetFileWriter.Mode.CREATE)
      .withWriterVersion(ParquetProperties.DEFAULT_WRITER_VERSION)
      .build()
  }
} 
开发者ID:51zero,项目名称:eel-sdk,代码行数:45,代码来源:RowParquetWriterFn.scala


注:本文中的org.apache.parquet.column.ParquetProperties类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。