错误写法
<select id="select" parameterType="xxx" resultMap="xxx">
select
distinct
<include refid="Base_Column_List" />
from xxx
<where>
<if test="createDate != null">
create_date <= #{createDate}
</if>
</where>
</select>
正确写法
<select id="select" parameterType="xxx" resultMap="xxx">
select
distinct
<include refid="Base_Column_List" />
from xxx
<where>
<if test="createDate != null">
create_date <= #{createDate}
</if>
</where>
</select>