libreoffice base left join删除行

Question

我在Base中有以下查询：

    SELECT field_name1, field_name2, .,.,.
FROM table_a
    INNER JOIN table_b
            ON table_a.field_name1 = table_b.field_name1
    INNER JOIN table_c
            ON table_a.field_name2 = table_c.field_name2
    INNER JOIN table_d
            ON table_d.field_name1 = table_b.field_name2
    LEFT JOIN table_e
            ON table_e.field_name1 = table_c.field_name2 AND
               table_e.field_name2 = table_b.field_name1

当我从table_a中删除一行时，Base解析器也会从table_e中删除该行。添加或修改行是可以的，在删除行时只是一个问题。这是实际的代码：

FROM "Futures_Orders"
  INNER JOIN "Contract_Details"
         ON "Contract_Details"."Symbol" = "Futures_Orders"."Symbol"
  INNER JOIN "Broker"
         ON "Broker"."Broker" = "Futures_Orders"."Broker"
  INNER JOIN "FX_Rates"
         ON "FX_Rates"."Code" = "Contract_Details"."Currency"
  LEFT JOIN "Broker_Commissions" 
         ON "Broker_Commissions"."Broker" = "Broker"."Broker" AND
              "Broker_Commissions"."Symbol" = "Contract_Details"."Symbol"

除了来自futures_orders的行，还会删除Broker_Commissions中的一行。