Included SQL fragment doesn't substitute parameter - mybatis

Question

My mapper interface looks like this.
public interface CommonMapper {
long selectSequenceNumber(String sequenceName);
}
And I prepared sql mapper looks like this.
<sql id="sequenceNumber">
<choose>
<when test="_databaseId == 'derby'">
VALUES NEXT VALUE FOR #{sequenceName}
</when>
<otherwise>
SELECT #{sequenceName}.NEXTVAL FROM DUAL
</otherwise>
</choose>
</sql>
<select id="selectSequenceNumber" resultType="_long">
<!--<include refid="....mapper.CommonMapper.sequenceNumber"/>-->
<include refid="sequenceNumber"/>
</select>
When I test mapper #{sequenceName} part is not substituted with given.
14:36:09.492 [main] DEBUG ....selectSequenceNumber - ==> Preparing: VALUES NEXT VALUE FOR ?
14:36:09.724 [main] ERROR ....PersistenceTests - failed to apply function for SqlSession
org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.sql.SQLSyntaxErrorException: Syntax error: Encountered "?" at line 1, column 23.
### The error may exist in .../CommonMapper.xml
### The error may involve ....CommonMapper.selectSequenceNumber
### The error occurred while executing a query
### SQL: VALUES NEXT VALUE FOR ?
### Cause: java.sql.SQLSyntaxErrorException: Syntax error: Encountered "?" at line 1, column 23.
Is this normal? How can I fix this?

Answer 1

You need to use string substitution ${sequenceName} instead of setting the parameter with #{} for direct string placement in your queries (such as for giving object names, dynamic sql etc...)
<sql id="sequenceNumber">
<choose>
<when test="_databaseId == 'derby'">
VALUES NEXT VALUE FOR ${sequenceName}
</when>
<otherwise>
SELECT ${sequenceName}.NEXTVAL FROM DUAL
</otherwise>
</choose>
</sql>
<select id="selectSequenceNumber" resultType="_long">
<!--<include refid="....mapper.CommonMapper.sequenceNumber"/>-->
<include refid="sequenceNumber"/>
</select>