table_partition_definition

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 190
        def table_partition_definition(table_name) # :nodoc:
          scope = quoted_scope(table_name, type: "BASE TABLE")

          query_value(<<~SQL, "SCHEMA")
            SELECT pg_catalog.pg_get_partkeydef(c.oid)
            FROM pg_catalog.pg_class c
              LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relname = #{scope[:name]}
              AND c.relkind IN (#{scope[:type]})
              AND n.nspname = #{scope[:schema]}
          SQL
        end