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[SPARK-29554][SQL] Add version SQL function #26209

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[SPARK-29554][SQL] Add version SQL function #26209

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[SPARK-29554][SQL] Add suppport for misc function - version
yaooqinn Oct 22, 2019
dc4e6f1
add anotation
yaooqinn Oct 23, 2019
3fb8199
rm example to fix build
yaooqinn Oct 23, 2019
fafe22b
minor review change
yaooqinn Oct 26, 2019
48c667f
doc too
yaooqinn Oct 26, 2019
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1 change: 1 addition & 0 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
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Expand Up @@ -486,6 +486,7 @@ object FunctionRegistry {
expression[CurrentDatabase]("current_database"),
expression[CallMethodViaReflection]("reflect"),
expression[CallMethodViaReflection]("java_method"),
expression[Version]("version"),

// grouping sets
expression[Cube]("cube"),
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14 changes: 12 additions & 2 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
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Expand Up @@ -17,8 +17,7 @@

package org.apache.spark.sql.catalyst.expressions

import java.util.UUID

import org.apache.spark._
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import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.codegen._
import org.apache.spark.sql.catalyst.expressions.codegen.Block._
Expand Down Expand Up @@ -164,3 +163,14 @@ case class Uuid(randomSeed: Option[Long] = None) extends LeafExpression with Sta

override def freshCopy(): Uuid = Uuid(randomSeed)
}

case class Version() extends LeafExpression with CodegenFallback {
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Could we change the class name to SparkVersion()? Version() is too general as a class name.

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cc @cloud-fan @Ngone51

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+1

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+1

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+1.

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+1

override def nullable: Boolean = false
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override def dataType: DataType = StringType

override def eval(input: InternalRow): Any = {
UTF8String.fromString(SPARK_VERSION + " " + SPARK_REVISION)
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}

}
7 changes: 7 additions & 0 deletions sql/core/src/test/scala/org/apache/spark/sql/MiscFunctionsSuite.scala
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Expand Up @@ -17,6 +17,7 @@

package org.apache.spark.sql

import org.apache.spark._
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import org.apache.spark.sql.test.SharedSparkSession

class MiscFunctionsSuite extends QueryTest with SharedSparkSession {
Expand All @@ -31,6 +32,12 @@ class MiscFunctionsSuite extends QueryTest with SharedSparkSession {
s"java_method('$className', 'method1', a, b)"),
Row("m1one", "m1one"))
}

test("version") {
checkAnswer(
Seq("").toDF("a").selectExpr("version()"),
Row(SPARK_VERSION + " " + SPARK_REVISION))
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}
}

object ReflectClass {
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