graphql-engine/server/src-rsr/table_info.sql

select
  coalesce(columns.columns, '[]') as columns,
  coalesce(pk.columns, '[]') as primary_key_columns,
  coalesce(constraints.constraints, '[]') as constraints,
  coalesce(views.view_info, 'null') as view_info
from
  information_schema.tables as tables
  left outer join (
    select
      c.table_schema,
      c.table_name,
      json_agg(
        json_build_object(
          'name',
          column_name,
          'type',
          udt_name,
          'is_nullable',
          is_nullable :: boolean
        )
      ) as columns
    from
      information_schema.columns c
    group by
      c.table_schema,
      c.table_name
  ) columns on (
    tables.table_schema = columns.table_schema
    AND tables.table_name = columns.table_name
  )
  left outer join (
    select * from hdb_catalog.hdb_primary_key
  ) pk on (
    tables.table_schema = pk.table_schema
    AND tables.table_name = pk.table_name
  )
  left outer join (
    select
      c.table_schema,
      c.table_name,
      json_agg(constraint_name) as constraints
    from
      information_schema.table_constraints c
    where
      c.constraint_type = 'UNIQUE'
      or c.constraint_type = 'PRIMARY KEY'
    group by
      c.table_schema,
      c.table_name
  ) constraints on (
    tables.table_schema = constraints.table_schema
    AND tables.table_name = constraints.table_name
  )
  left outer join (
    select
      table_schema,
      table_name,
      json_build_object(
        'is_updatable',
        (is_updatable::boolean OR is_trigger_updatable::boolean),
        'is_deletable',
        (is_updatable::boolean OR is_trigger_deletable::boolean),
        'is_insertable',
        (is_insertable_into::boolean OR is_trigger_insertable_into::boolean)
      ) as view_info
    from
      information_schema.views v
  ) views on (
    tables.table_schema = views.table_schema
    AND tables.table_name = views.table_name
  )
where
  tables.table_schema = $1 AND
  tables.table_name = $2