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  1. Sub-task SPARK-14398
    Audit non-reserved keyword list in ANTLR4 parser.
  2. Sub-task SPARK-14213
    Migrate HiveQl parsing to ANTLR4 parser
  3. Sub-task SPARK-14211
    Remove ANTLR3 based parser
  4. Sub-task SPARK-14086
    Add DDL commands to ANTLR4 Parser
  5. Sub-task SPARK-13713
    Replace ANTLR3 SQL parser by a ANTLR4 SQL parser
  6. Sub-task SPARK-13206
    Subquery Alias in Hive Parser
  7. Sub-task SPARK-12968
    Implement command to set current database
  8. Sub-task SPARK-12924
    Make Token pattern matching in the parser case insensitive
  9. Sub-task SPARK-12889
    Rename ParserDialect -> ParserInterface
  10. Sub-task SPARK-12866
    Migrate the ExtendedHiveQlParser to the new parser
  11. Sub-task SPARK-12865
    Migrate the SparkSQLParser to the new parser
  12. Sub-task SPARK-12855
    Remove parser pluggability
  13. Sub-task SPARK-12848
    Parse numbers as decimals rather than doubles
  14. Sub-task SPARK-12772
    Better error message for syntax error in the SQL parser
  15. Sub-task SPARK-12745
    Limit is not supported inside Set Operation
  16. Sub-task SPARK-12715
    Improve test coverage
  17. Sub-task SPARK-12689
    Migrate DDL parsing to the newly absorbed parser
  18. Sub-task SPARK-12687
    Support from clause surrounded by `()`
  19. Sub-task SPARK-12681
    Split IdentifiersParser.g to avoid single huge java source
  20. Sub-task SPARK-12578
    Parser should not silently ignore the distinct keyword used in an aggregate function when OVER clause is used
  21. Sub-task SPARK-12577
    better support of parentheses in partition by and order by clause of window function's over clause
  22. Sub-task SPARK-12576
    Enable expression parsing (used in DataFrames)
  23. Sub-task SPARK-12575
    Grammar parity with existing SQL parser
  24. Sub-task SPARK-12574
    Move parser from hive module to catalyst (or sql-core) module
  25. Sub-task SPARK-12573
    Add acknowledge that the parser was initially from Hive
  26. Sub-task SPARK-12572
    Initial import of the Hive parser
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