feat: Add task to SDK

[sfc-gh-asawicki]

Changes

• Add task to SDK:
  • Add implementation based on references
• Extend the generator:
  • add findings to readme
  • add ShowByID generation
  • add custom operation generation (for EXECUTE)
  • fix formatting in different generated places
  • add no quotes, equals, and no_equals tags to transformers
  • add utility builder methods for DSL for common types (in Show: Like, In, StartsWith, Limit, Terse, in Create: tags, session parameters, in Alter: SessionParameters - set and unset)
  • add new validation type (for generate invocation of existing validate() method for common existing types)
  • add boolean assignments
  • refactor assignments and introduce assignment for convenience methods for every type (Assignment and OptionalAssignment)
• Misc:
  • Fix copy-paste names in session policy integration tests
  • Update resource table in README
  • Add usage for generator to README

The generator was used as part of this implementation (check the tasks_def.go file first). After generation, the following changes were applied:

• Remove duplicated convert()
• Use Describe as ShowByID (because returned structures are the same)
• Change types in taskDBRow to sql.NullString (all nullable + all the ones that are not a part of SHOW TERSE output)
• Add mapping to taskDBRow
• Modify minimal valid options for Create and for Show
• Add another test for exactly one validation
• Add branches for Alter tests
• Remove the all options test from Drop and Describe
• Add the ID() method to Task
• Change AllowOverlappingExecution to bool after consideration (still string in def)
• Remove id from TestTasks_Show
• Fill out unit tests
• Fill out acceptance tests

Test Plan

• unit tests (SQL generation and validations)
• integration tests (SQL invocation)
• acceptance tests (nothing should break yet)

References

• CREATE
• ALTER
• DROP
• SHOW
• DESCRIBE
• EXECUTE

[github-actions]

Integration tests failure for 42305f5bcaaf892e9cbf81b942ec4fde3a0e2e8e

[github-actions]

Integration tests failure for ecfec6cc445a59cc5b133a6bf82ae81a73f208ac

[github-actions]

Integration tests failure for 3de73fb16f23458723a0d8f073d2fc535ffccbf6

[github-actions]

Integration tests success for 9b5df272043ce76f81ed1962390c30575a567d4a

[github-actions]

Integration tests success for 7ce0f7fcdd63b5b633e5e879dec72820040eb772