mybatis萬用字元引用報錯的問題XML fragments parsed from previous mappers does not contain value
寫mapper A的時候，發現內容太長，於是把被引用的refid單獨抽出來成為一個新的mapper檔案，A中只保留了直接對外的介面申請了，於是就有了mapper B 檔案。
在A檔案裡面引用B的sql，如：
<include refid="B.where_1" />
結果報錯：
org.apache.ibatis.builder.IncompleteElementException: Could not find SQL statement to include with refid 'A.where_2'
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.findSqlFragment(XMLIncludeTransformer.java:104)
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.applyIncludes(XMLIncludeTransformer.java:64)
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.applyIncludes(XMLIncludeTransformer.java:87)
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.applyIncludes(XMLIncludeTransformer.java:75)
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.applyIncludes(XMLIncludeTransformer.java:87)
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.applyIncludes(XMLIncludeTransformer.java:48)
at org.apache.ibatis.builder.xml.XMLStatementBuilder.parseStatementNode(XMLStatementBuilder.java:88)
at org.apache.ibatis.session.Configuration.buildAllStatements(Configuration.java:760)
Caused by: java.lang.IllegalArgumentException: XML fragments parsed from previous mappers does not contain value for A.where_2
at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:860)
at org.apache.ibatis.builder.xml.XMLIncludeTransformer.findSqlFragment(XMLIncludeTransformer.java:101)
... 69 more
後來發現 B檔案中B.where_1引用了<include refid="where_2" />，原來是在引用的時候沒有加字首，改成<include refid="B.where_2" />這樣就可以了.
最終是這樣的：
A檔案：
<select id="getCount" resultMap="BaseResultMap">
select count(*)
from X a
<include refid="B.where_1" />
</select>B檔案：
<sql id="where_1">
where a.id =#{id,jdbcType=VARCHAR}
<include refid="B.where_2" />
</sql>
<sql id="where_2">
a.name =#{name,jdbcType=VARCHAR}
</sql>
B檔案最開始where_1中引用where_2時沒有加B.的字首，所有報錯了。原來where_1在引入到A檔案後，直接把where_2也引用過去了，然後相當於是A檔案引用的where_2.