cloud-fan commented on a change in pull request #34848:
URL: https://github.com/apache/spark/pull/34848#discussion_r814582387
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
##########
@@ -510,23 +575,37 @@ case class Contains(left: Expression, right: Expression)
extends StringPredicate
false
> SELECT _FUNC_('Spark SQL', null);
NULL
+ > SELECT _FUNC_(x'537061726b2053514c', x'537061726b');
+ true
+ > SELECT _FUNC_(x'537061726b2053514c', x'53514c');
+ false
""",
since = "3.3.0",
group = "string_funcs"
)
+object StartsWithExpressionBuilder extends
StringBinaryPredicateExpressionBuilderBase {
+ override protected def funcName: String = "contains"
+
+ override protected def createStringPredicate(left: Expression, right:
Expression): Expression = {
+ StartsWith(left, right)
+ }
+}
+
case class StartsWith(left: Expression, right: Expression) extends
StringPredicate {
override def compare(l: UTF8String, r: UTF8String): Boolean = l.startsWith(r)
override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = {
defineCodeGen(ctx, ev, (c1, c2) => s"($c1).startsWith($c2)")
}
+ override def prettyName: String = "startswith"
Review comment:
ditto
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