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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