XML中SQL的if標簽使用

判斷不為空
where 1=1 // 此句用來處理某些全要判空的情況
<if test="compShopMO.uciCompName != null and compShopMO.uciCompName != ''">
    and USER_COMPANY_INFO.UCI_COMP_NAME = #{compShopMO.uciCompName}
</if>

判斷為空
<if test="compShopMO.uciCompName == null or compShopMO.uciCompName == ''">
    and USER_COMPANY_INFO.UCI_COMP_NAME = #{compShopMO.uciCompName}
</if>