spark AvroScanBuilder 源码
spark AvroScanBuilder 代码
文件路径：/connector/avro/src/main/scala/org/apache/spark/sql/v2/avro/AvroScanBuilder.scala
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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package org.apache.spark.sql.v2.avro
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.catalyst.StructFilters
import org.apache.spark.sql.connector.read.Scan
import org.apache.spark.sql.execution.datasources.PartitioningAwareFileIndex
import org.apache.spark.sql.execution.datasources.v2.FileScanBuilder
import org.apache.spark.sql.sources.Filter
import org.apache.spark.sql.types.StructType
import org.apache.spark.sql.util.CaseInsensitiveStringMap
class AvroScanBuilder (
sparkSession: SparkSession,
fileIndex: PartitioningAwareFileIndex,
schema: StructType,
dataSchema: StructType,
options: CaseInsensitiveStringMap)
extends FileScanBuilder(sparkSession, fileIndex, dataSchema) {
override def build(): Scan = {
AvroScan(
sparkSession,
fileIndex,
dataSchema,
readDataSchema(),
readPartitionSchema(),
options,
pushedDataFilters,
partitionFilters,
dataFilters)
}
override def pushDataFilters(dataFilters: Array[Filter]): Array[Filter] = {
if (sparkSession.sessionState.conf.avroFilterPushDown) {
StructFilters.pushedFilters(dataFilters, dataSchema)
} else {
Array.empty[Filter]
}
}
}
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