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  1. Sub-task SPARK-49054
    Column default value should support current_* functions
  2. Sub-task SPARK-47029
    ALTER COLUMN DROP DEFAULT test fails with JSON data sources
  3. Sub-task SPARK-47026
    Include coverage of JSON data sources in array/struct/map default value tests
  4. Sub-task SPARK-46879
    Run optimizer on REPLACE TABLE column defaults
  5. Sub-task SPARK-46849
    Run optimizer on CREATE TABLE column defaults
  6. Sub-task SPARK-46370
    Fix bug when querying from table after changing defaults
  7. Sub-task SPARK-43085
    Fix bug in column DEFAULT assignment for target tables with multi-part names
  8. Sub-task SPARK-43071
    Support SELECT DEFAULT with ORDER BY, LIMIT, OFFSET for INSERT source relation
  9. Sub-task SPARK-43018
    Fix bug with timestamp literals
  10. Sub-task SPARK-42521
    Add NULL values for INSERT commands with user-specified lists of fewer columns than the target table
  11. Sub-task SPARK-42294
    Include column default values in DESCRIBE output for V2 tables
  12. Sub-task SPARK-42123
    Include column default values in DESCRIBE output for V1 tables
  13. Sub-task SPARK-41862
    Fix a correctness bug in existence DEFAULT value lookups for the Orc data source
  14. Sub-task SPARK-40001
    Add config to make DEFAULT values in JSON tables mutually exclusive with SQLConf.JSON_GENERATOR_IGNORE_NULL_FIELDS
  15. Sub-task SPARK-40000
    Add config to toggle whether to automatically add default values for INSERTs without user-specified fields
  16. Sub-task SPARK-39985
    Test DEFAULT column values with DataFrames
  17. Sub-task SPARK-39926
    Fix bug in existence DEFAULT value lookups for non-vectorized Parquet scans
  18. Sub-task SPARK-39886
    Disable DEFAULT column SQLConf until implementation is complete
  19. Sub-task SPARK-39862
    Fix bug in existence DEFAULT value lookups for V2 data sources
  20. Sub-task SPARK-39844
    Restrict adding DEFAULT columns for existing tables to allowlist of supported data source types
  21. Sub-task SPARK-39843
    Prohibit UDF expressions in DEFAULT values for now
  22. Sub-task SPARK-39818
    Fix bug in ARRAY, STRUCT, MAP types with DEFAULT values with NULL field(s)
  23. Sub-task SPARK-39643
    Prohibit subquery expressions in DEFAULT values for now
  24. Sub-task SPARK-39557
    Support ARRAY, STRUCT, MAP types as DEFAULT values
  25. Sub-task SPARK-39383
    Support V2 data sources with DEFAULT values
  26. Sub-task SPARK-39359
    Restrict DEFAULT columns to allowlist of supported data source types
  27. Sub-task SPARK-39294
    Support Orc file scans with DEFAULT values
  28. Sub-task SPARK-39265
    Support Parquet file scans with DEFAULT values
  29. Sub-task SPARK-39245
    Support Avro file scans with DEFAULT values
  30. Sub-task SPARK-39211
    Support JSON file scans with default values
  31. Sub-task SPARK-39143
    Support CSV file scans with DEFAULT values
  32. Sub-task SPARK-39096
    Support MERGE commands with DEFAULT values
  33. Sub-task SPARK-39078
    Support UPDATE commands with DEFAULT values
  34. Sub-task SPARK-38869
    Respect Table capability `ACCEPT_ANY_SCHEMA` in default column resolution
  35. Sub-task SPARK-38838
    Support ALTER TABLE ALTER COLUMN commands with DEFAULT values
  36. Sub-task SPARK-38811
    Support ALTER TABLE ADD COLUMN commands with DEFAULT values
  37. Sub-task SPARK-38795
    Support INSERT INTO user specified column lists with DEFAULT values
  38. Sub-task SPARK-38336
    Catalyst changes for DEFAULT column support
  39. Sub-task SPARK-38335
    Parser changes for DEFAULT column support
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