Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/12646#discussion_r60950803 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala --- @@ -1051,6 +1053,22 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef] with Logging { } /** + * Create a name LTRIM for TRIM(Leading), RTRIM for TRIM(Trailing), TRIM for TRIM(BOTH) + */ + private def getTrimFuncName(ctx: FunctionCallContext, optType: Int): String = { + if (ctx.qualifiedName.getText.toLowerCase != "trim") { + throw new ParseException(s"The specified function ${ctx.qualifiedName.getText} " + + s"doesn't support with option $optType.", ctx) --- End diff -- Also, `$optType` needs to be changed. ``` scala> sql("select lower(LEADING 'S' FROM 'SS abc S')").head org.apache.spark.sql.catalyst.parser.ParseException: The specified function lower doesn't support with option 119.(line 1, pos 7) ```
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