Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/12838#discussion_r61728670
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -655,8 +655,13 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef]
with Logging {
val fraction = ctx.percentage.getText.toDouble
sample(fraction / 100.0d)
+ case SqlBaseParser.BYTELENGTH_LITERAL =>
+ throw new ParseException(
+ "TABLESAMPLE(BUCKET byteLengthLiteral) is not supported", ctx)
+
case SqlBaseParser.BUCKET if ctx.ON != null =>
- throw new ParseException("TABLESAMPLE(BUCKET x OUT OF y ON id) is
not supported", ctx)
+ throw new ParseException(
+ "TABLESAMPLE(BUCKET x OUT OF y ON colname/rand()) is not
supported", ctx)
--- End diff --
Message is slightly confusing if user is passing in anything other than
rand. How about two error messages? One for column and one for function.
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