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[SPARK-9160][SQL] codegen encode, decode #7543

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[SPARK-9160][SQL] codegen encode, decode #7543

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25 changes: 23 additions & 2 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -791,7 +791,7 @@ case class UnBase64(child: Expression)
* If either argument is null, the result will also be null.
*/
case class Decode(bin: Expression, charset: Expression)
extends BinaryExpression with ImplicitCastInputTypes with CodegenFallback {
extends BinaryExpression with ImplicitCastInputTypes {

override def left: Expression = bin
override def right: Expression = charset
Expand All @@ -802,6 +802,17 @@ case class Decode(bin: Expression, charset: Expression)
val fromCharset = input2.asInstanceOf[UTF8String].toString
UTF8String.fromString(new String(input1.asInstanceOf[Array[Byte]], fromCharset))
}

override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
nullSafeCodeGen(ctx, ev, (bytes, charset) =>
s"""
try {
${ev.primitive} = UTF8String.fromString(new String($bytes, $charset.toString()));
} catch (java.io.UnsupportedEncodingException e) {
org.apache.spark.unsafe.PlatformDependent.throwException(e);
}
""")
}
}

/**
Expand All @@ -810,7 +821,7 @@ case class Decode(bin: Expression, charset: Expression)
* If either argument is null, the result will also be null.
*/
case class Encode(value: Expression, charset: Expression)
extends BinaryExpression with ImplicitCastInputTypes with CodegenFallback {
extends BinaryExpression with ImplicitCastInputTypes {

override def left: Expression = value
override def right: Expression = charset
Expand All @@ -821,6 +832,16 @@ case class Encode(value: Expression, charset: Expression)
val toCharset = input2.asInstanceOf[UTF8String].toString
input1.asInstanceOf[UTF8String].toString.getBytes(toCharset)
}

override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
nullSafeCodeGen(ctx, ev, (string, charset) =>
s"""
try {
${ev.primitive} = $string.toString().getBytes($charset.toString());
} catch (java.io.UnsupportedEncodingException e) {
org.apache.spark.unsafe.PlatformDependent.throwException(e);
}""")
}
}

/**
Expand Down