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  1. Sub-task SPARK-9462
    Initialize nondeterministic expressions in code gen fallback mode
  2. Sub-task SPARK-9192
    add initialization phase for nondeterministic expression
  3. Sub-task SPARK-9186
    make deterministic describing the tree rather than the expression
  4. Sub-task SPARK-9102
    Improve project collapse with nondeterministic expressions
  5. Sub-task SPARK-9083
    If order by clause has non-deterministic expressions, we should add a project to materialize results of these expressions
  6. Sub-task SPARK-9082
    Filter using non-deterministic expressions should not be pushed down
  7. Sub-task SPARK-9020
    Support mutable state in code gen expressions
  8. Sub-task SPARK-8609
    After initializing a DataFrame with random columns and a seed, ordering by that random column should return same sorted order
  9. Sub-task SPARK-8608
    After initializing a DataFrame with random columns and a seed, df.show should return same value
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