feat(grammar): postgres row level security

[mattpetersen]

Summary

Support [ENABLE / DISABLE / FORCE / NO FORCE] ROW LEVEL SECURITY, an ALTER TABLE command Postgres added in release 9.5.

Adds two new keywords:

• keyword_enable
• keyword_disable

Adds one new branch to the alter_table grammar rule.

Current behavior:

tree-sitter generate && echo 'ALTER TABLE my_table ENABLE ROW LEVEL SECURITY;' | tree-sitter parse

(program [0, 0] - [1, 0]
  (statement [0, 0] - [0, 31]
    (alter_table [0, 0] - [0, 31]
      (keyword_alter [0, 0] - [0, 5])
      (keyword_table [0, 6] - [0, 11])
      (object_reference [0, 12] - [0, 20]
        name: (identifier [0, 12] - [0, 20]))
      (add_column [0, 21] - [0, 31]
        (column_definition [0, 21] - [0, 31]
          name: (identifier [0, 21] - [0, 27])
          custom_type: (object_reference [0, 28] - [0, 31]
            name: (identifier [0, 28] - [0, 31]))))))
  (ERROR [0, 32] - [0, 46]
    (keyword_security [0, 38] - [0, 46])))

Behavior after this change:

(program [0, 0] - [1, 0]
  (statement [0, 0] - [0, 46]
    (alter_table [0, 0] - [0, 46]
      (keyword_alter [0, 0] - [0, 5])
      (keyword_table [0, 6] - [0, 11])
      (object_reference [0, 12] - [0, 20]
        name: (identifier [0, 12] - [0, 20]))
      (keyword_enable [0, 21] - [0, 27])
      (keyword_row [0, 28] - [0, 31])
      (keyword_level [0, 32] - [0, 37])
      (keyword_security [0, 38] - [0, 46]))))

Test this change:

git fetch && git switch mp/row-level-security

tree-sitter generate && tree-sitter test

Issue link:

#345

[mattpetersen]

I'll fix the CI issues later tonight. Thanks for running!

[dmfay]

Sounds good, thanks for adding these! Everything else looks good to me.