Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/13909#discussion_r93871348
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -56,33 +57,104 @@ case class CreateArray(children: Seq[Expression])
extends Expression {
}
override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = {
- val arrayClass = classOf[GenericArrayData].getName
- val values = ctx.freshName("values")
- ctx.addMutableState("Object[]", values, s"this.$values = null;")
-
- ev.copy(code = s"""
- this.$values = new Object[${children.size}];""" +
- ctx.splitExpressions(
- ctx.INPUT_ROW,
- children.zipWithIndex.map { case (e, i) =>
- val eval = e.genCode(ctx)
- eval.code + s"""
- if (${eval.isNull}) {
- $values[$i] = null;
- } else {
- $values[$i] = ${eval.value};
- }
- """
- }) +
- s"""
- final ArrayData ${ev.value} = new $arrayClass($values);
- this.$values = null;
- """, isNull = "false")
+ val et = dataType.elementType
+ val evals = children.map(e => e.genCode(ctx))
+ val (preprocess, assigns, postprocess, arrayData) =
+ GenArrayData.genCodeToCreateArrayData(ctx, et, evals, true)
+ ev.copy(
+ code = preprocess + ctx.splitExpressions(ctx.INPUT_ROW, assigns) +
postprocess,
+ value = arrayData,
+ isNull = "false")
}
override def prettyName: String = "array"
}
+private [sql] object GenArrayData {
+ /**
+ * Return Java code pieces based on DataType and isPrimitive to allocate
ArrayData class
+ *
+ * @param ctx a [[CodegenContext]]
+ * @param elementType data type of underlying array elements
+ * @param elementsCode a set of [[ExprCode]] for each element of an
underlying array
+ * @param allowNull if to assign null value to an array element is
allowed
+ * @return (code pre-assignments, assignments to each array elements,
code post-assignments,
+ * arrayData name)
+ */
+ def genCodeToCreateArrayData(
+ ctx: CodegenContext,
+ elementType: DataType,
+ elementsCode: Seq[ExprCode],
+ allowNull: Boolean): (String, Seq[String], String, String) = {
+ val arrayName = ctx.freshName("array")
+ val arrayDataName = ctx.freshName("arrayData")
+ val numElements = elementsCode.length
+
+ if (!ctx.isPrimitiveType(elementType)) {
+ val genericArrayClass = classOf[GenericArrayData].getName
+ ctx.addMutableState("Object[]", arrayName,
+ s"this.$arrayName = new Object[${numElements}];")
+
+ val assignments = elementsCode.zipWithIndex.map { case (eval, i) =>
+ val isNullAssignment = if (allowNull) {
+ s"$arrayName[$i] = null;"
+ } else {
+ "throw new RuntimeException(\"Cannot use null as map key!\");"
+ }
+ eval.code + s"""
+ if (${eval.isNull}) {
+ $isNullAssignment
+ } else {
+ $arrayName[$i] = ${eval.value};
+ }
+ """
+ }
+
+ /*
+ TODO: When we declare arrayDataName as GenericArrayData,
+ we have to solve the following exception
+ https://github.com/apache/spark/pull/13909/files#r93813725
+ */
+ ("",
+ assignments,
+ s"final ArrayData $arrayDataName = new
$genericArrayClass($arrayName);",
+ arrayDataName)
+ } else {
+ val unsafeArraySizeInBytes =
+ UnsafeArrayData.calculateHeaderPortionInBytes(numElements) +
+
ByteArrayMethods.roundNumberOfBytesToNearestWord(elementType.defaultSize *
numElements)
+ val baseOffset = Platform.BYTE_ARRAY_OFFSET
+ ctx.addMutableState("UnsafeArrayData", arrayDataName, "");
+
+ val primitiveValueTypeName = ctx.primitiveTypeName(elementType)
+ val assignments = elementsCode.zipWithIndex.map { case (eval, i) =>
+ val isNullAssignment = if (allowNull) {
+ s"$arrayDataName.setNullAt($i);"
+ } else {
+ "throw new RuntimeException(\"Cannot use null as map key!\");"
--- End diff --
ditto.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
