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[SPARK-28997][SQL] Add spark.sql.dialect #25697

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[SPARK-28997][SQL] Add spark.sql.dialect #25697

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0e7f281
dialect
gengliangwang Sep 23, 2019
094d58e
new package and expression
gengliangwang Sep 24, 2019
9f14680
revise
gengliangwang Sep 24, 2019
5a69400
address comments
gengliangwang Sep 25, 2019
bb657e9
fix test failure
gengliangwang Sep 25, 2019
82a9e4d
revise
gengliangwang Sep 25, 2019
72a1539
add NullIntolerant trait
gengliangwang Sep 25, 2019
af97b99
address comments
gengliangwang Sep 25, 2019
b518114
address more comments
gengliangwang Sep 26, 2019
75aeda7
one more comment
gengliangwang Sep 26, 2019
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add NullIntolerant trait
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@gengliangwang
gengliangwang committed Sep 25, 2019
commit 72a1539996c5d90daec0649e7212123742bf6d36
3 changes: 2 additions & 1 deletion ...ala/org/apache/spark/sql/catalyst/expressions/postgreSQL/PostgreCastStringToBoolean.scala
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Expand Up @@ -24,7 +24,8 @@ import org.apache.spark.sql.catalyst.util.postgreSQL.StringUtils
import org.apache.spark.sql.types.{BooleanType, DataType, StringType}
import org.apache.spark.unsafe.types.UTF8String

case class PostgreCastStringToBoolean(child: Expression) extends UnaryExpression {
case class PostgreCastStringToBoolean(child: Expression)
extends UnaryExpression with NullIntolerant {

override def checkInputDataTypes(): TypeCheckResult = {
if (child.dataType == StringType) {
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