text:    INSERT INTO {{ diff_schema }}.{{ diff_table }} ( {{ join_cols|join(", ") }}, column_name )
          SELECT {{ join_cols|join(", ") }},
                 '{{ column }}' as column_name
            FROM (
          SELECT {{ join_cols|join(", ") }},
                 x_{{ column }} <=> y_{{ column }} AS {{ column }}_eq
            FROM {{ joined_schema }}.{{ joined_table }}
                 ) AS t1
           WHERE t1.{{ column }}_eq IS FALSE;