Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/18387
ah check analysis also works, the problem then becomes, shall we do the
checking in each operator, or do put it in a central place like `CheckAnalysis`?
BTW, putting in the operator can have better error message for SQL, e.g.
```
org.apache.spark.sql.catalyst.parser.ParseException
Sampling fraction (1.01) must be on interval [0, 1](line 1, pos 24)
== SQL ==
SELECT mydb1.t1 FROM t1 TABLESAMPLE (101 PERCENT)
------------------------^^^
```
users can know which part of their SQL goes wrong.
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