================================================================================
Create an empty table
================================================================================
create table foo ();
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions)
    )
  )
)

================================================================================
Create an empty table in specified schema
================================================================================
create table public.foo ();
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_table)
      (table_reference
        schema: (identifier)
        name: (identifier)
      )
      (column_definitions)
    )
  )
)

================================================================================
Create an empty temporary table
================================================================================
create temporary table foo ();
create temp table foo ();
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_temporary)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions)
    )
  )
  (statement
    (create_table
      (keyword_create)
      (keyword_temporary)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions)
    )
  )
)

================================================================================
Create an empty unlogged table
================================================================================
create unlogged table foo ();
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_unlogged)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions)
    )
  )
)

================================================================================
Create an empty table if not exists
================================================================================
create table if not exists foo ();
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_table)
      (keyword_if)
      (keyword_not)
      (keyword_exists)
      (table_reference
        name: (identifier)
      )
      (column_definitions)
    )
  )
)

================================================================================
Create a table with different columns
================================================================================
create table foo (
  c1  text,
  c2  boolean,
  c3  numeric(1),
  c4  timestamp with time zone,
  c5  varchar(120),
  c6  uuid
);
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_boolean)
        )
        (column_definition
          name: (identifier)
          datatype: (numeric
            (keyword_numeric)
            precision: (literal)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_timestamptz)
        )
        (column_definition
          name: (identifier)
          datatype: (varchar
            (keyword_varchar)
            size: (literal)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_uuid)
        )
      )
    )
  )
)

================================================================================
Create a table with column constraints
================================================================================
create table foo (
  c1  text  not null,
  c2  text  null,
  c3  text  not null default 'hello'
);
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_not)
            (keyword_null)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_null)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_not)
            (keyword_null)
          )
          (column_constraint
            (keyword_default)
            (literal)
          )
        )
      )
    )
  )
)

================================================================================
Create a table with named column constraints
================================================================================
create table foo (
  c1  text  constraint strong_c1 not null,
  c2  text  constraint weak_c2 null,
  c3  text  constraint "c3 with power" not null constraint "c2 set default hello" default 'hello',
  c4  text  constraint "c4 unique" unique nulls not distinct
);
--------------------------------------------------------------------------------

(source_file
  (statement
    (create_table
      (keyword_create)
      (keyword_table)
      (table_reference
        name: (identifier)
      )
      (column_definitions
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_constraint)
            name: (identifier)
            (keyword_not)
            (keyword_null)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_constraint)
            name: (identifier)
            (keyword_null)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_constraint)
            name: (identifier)
            (keyword_not)
            (keyword_null)
          )
          (column_constraint
            (keyword_constraint)
            name: (identifier)
            (keyword_default)
            (literal)
          )
        )
        (column_definition
          name: (identifier)
          datatype: (keyword_text)
          (column_constraint
            (keyword_constraint)
            name: (identifier)
            (keyword_unique)
            (keyword_nulls)
            (keyword_not)
            (keyword_distinct)
          )
        )
      )
    )
  )
)