Springboot項目，使用postgresql數據庫，mybatis作持久層框架，sql
1 <select id="select" resultMap="BaseResultMap" parameterType="com.vo.TestVo"> 2 select 3 <include refid="Base_Column_List" /> 4 from test 5 where state='2' 6 <if test="comCode != null" > 7 and com_code=${comCode} 8 </if> 9 </select>
comcode的形式如：'1100'數據庫
執行查詢時報錯:mybatis
### The error may exist in file [D:\workspaceAll\eclipseWorkspace\test\target\classes\mapper\custom\test\QcTestDao.xml] ### The error may involve com.dao.TestDao.select-Inline ### The error occurred while setting parameters ### SQL: select id, comcode,name from test where state='2' and com_code=00000000 ### Cause: org.postgresql.util.PSQLException: ERROR: operator does not exist: character varying = integer 建議：No operator matches the given name and argument type(s). You might need to add explicit type casts. 位置：286 ; bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: ERROR: operator does not exist: character varying = integer 建議：No operator matches the given name and argument type(s). You might need to add explicit type casts. 位置：286] with root cause org.postgresql.util.PSQLException: ERROR: operator does not exist: character varying = integer 建議：No operator matches the given name and argument type(s). You might need to add explicit type casts. 位置：286
解決方法：app
1 <if test="comCode != null" > 2 and com_code=#{comCode,jdbcType=VARCHAR} 3 </if>