Github user kevinyu98 commented on a diff in the pull request:
https://github.com/apache/spark/pull/12646#discussion_r116800916
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -1091,6 +1094,23 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
}
/**
+ * Create a name LTRIM for TRIM(Leading), RTRIM for TRIM(Trailing), TRIM
for TRIM(BOTH)
+ */
+ private def visitTrimFuncName(ctx: FunctionCallContext, opt: Token):
String = {
+ if (ctx.qualifiedName.getText.toLowerCase != "trim") {
+ throw new ParseException(s"The specified function
${ctx.qualifiedName.getText} " +
+ s"doesn't support with option ${opt.getText}.", ctx)
+ }
+ opt.getType match {
+ case SqlBaseParser.BOTH => "trim"
+ case SqlBaseParser.LEADING => "ltrim"
+ case SqlBaseParser.TRAILING => "rtrim"
+ case _ => throw new ParseException(s"Function trim doesn't support "
+
+ s"this ${opt.getType}.", ctx)
--- End diff --
thanks, will change
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