/
inputFileBlock.scala
118 lines (94 loc) · 4.15 KB
/
inputFileBlock.scala
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/*
* 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.
*/
package org.apache.spark.sql.catalyst.expressions
import org.apache.spark.rdd.InputFileBlockHolder
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.codegen.{CodegenContext, CodeGenerator, ExprCode, FalseLiteral}
import org.apache.spark.sql.catalyst.expressions.codegen.Block._
import org.apache.spark.sql.types.{DataType, LongType, StringType}
import org.apache.spark.unsafe.types.UTF8String
// scalastyle:off whitespace.end.of.line
@ExpressionDescription(
usage = "_FUNC_() - Returns the name of the file being read, or empty string if not available.",
examples = """
Examples:
> SELECT _FUNC_();
""",
since = "1.5.0",
group = "misc_funcs")
// scalastyle:on whitespace.end.of.line
case class InputFileName() extends LeafExpression with Nondeterministic {
override def nullable: Boolean = false
override def dataType: DataType = StringType
override def prettyName: String = "input_file_name"
override protected def initializeInternal(partitionIndex: Int): Unit = {}
override protected def evalInternal(input: InternalRow): UTF8String = {
InputFileBlockHolder.getInputFilePath
}
override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = {
val className = InputFileBlockHolder.getClass.getName.stripSuffix("$")
val typeDef = s"final ${CodeGenerator.javaType(dataType)}"
ev.copy(code = code"$typeDef ${ev.value} = $className.getInputFilePath();",
isNull = FalseLiteral)
}
}
@ExpressionDescription(
usage = "_FUNC_() - Returns the start offset of the block being read, or -1 if not available.",
examples = """
Examples:
> SELECT _FUNC_();
-1
""",
since = "2.2.0",
group = "misc_funcs")
case class InputFileBlockStart() extends LeafExpression with Nondeterministic {
override def nullable: Boolean = false
override def dataType: DataType = LongType
override def prettyName: String = "input_file_block_start"
override protected def initializeInternal(partitionIndex: Int): Unit = {}
override protected def evalInternal(input: InternalRow): Long = {
InputFileBlockHolder.getStartOffset
}
override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = {
val className = InputFileBlockHolder.getClass.getName.stripSuffix("$")
val typeDef = s"final ${CodeGenerator.javaType(dataType)}"
ev.copy(code = code"$typeDef ${ev.value} = $className.getStartOffset();", isNull = FalseLiteral)
}
}
@ExpressionDescription(
usage = "_FUNC_() - Returns the length of the block being read, or -1 if not available.",
examples = """
Examples:
> SELECT _FUNC_();
-1
""",
since = "2.2.0",
group = "misc_funcs")
case class InputFileBlockLength() extends LeafExpression with Nondeterministic {
override def nullable: Boolean = false
override def dataType: DataType = LongType
override def prettyName: String = "input_file_block_length"
override protected def initializeInternal(partitionIndex: Int): Unit = {}
override protected def evalInternal(input: InternalRow): Long = {
InputFileBlockHolder.getLength
}
override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = {
val className = InputFileBlockHolder.getClass.getName.stripSuffix("$")
val typeDef = s"final ${CodeGenerator.javaType(dataType)}"
ev.copy(code = code"$typeDef ${ev.value} = $className.getLength();", isNull = FalseLiteral)
}
}