instance method table_exists?

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 621
      def table_exists?(name)
        name          = name.to_s
        schema, table = name.split('.', 2)

        unless table # A table was provided without a schema
          table  = schema
          schema = nil
        end

        if name =~ /^"/ # Handle quoted table names
          table  = name
          schema = nil
        end

        query(<<-SQL).first[0].to_i > 0
            SELECT COUNT(*)
            FROM pg_tables
            WHERE tablename = '#{table.gsub(/(^"|"$)/,'')}'
            AND schemaname = #{schema ? "'#{schema}'" : "ANY (current_schemas(false))"}
        SQL
      end