[jira] [Created] (SPARK-30791) Dataframe add sameResult and sementicHash method

["Weichen Xu (Jira)" <ji...@apache.org>]

Weichen Xu created SPARK-30791:
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             Summary: Dataframe add sameResult and sementicHash method
                 Key: SPARK-30791
                 URL: https://issues.apache.org/jira/browse/SPARK-30791
             Project: Spark
          Issue Type: New Feature
          Components: ML, SQL
    Affects Versions: 3.0.0
            Reporter: Weichen Xu


Sometimes, we want to check whether two dataframe is the same.

There is already an internal API like:
{code:java}
df1.queryExecution.logical.sameResult(...) {code}
We can make a public API for this:

Like:
{code:java}
df1.sameResult(df2) // return true if dataframe will return the same result
df1.semanticHash // return a semantic hashcode, if the two dataframe will return the same result, their semantic hashcode should be the same.{code}
CC [~cloud_fan] [~mengxr] [~liangz]

 



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