2.3 jars

mybatis-jpa-extra-spring-boot-starter/src/main/java/org/apache/mybatis/jpa/starter/MybatisAutoConfiguration.java

@@ -158,6 +158,7 @@ public class MybatisAutoConfiguration implements InitializingBean {
         }
     }
     
+    if (StringUtils.hasLength(this.properties.getTableColumnCase())) {
 	    //default is lowercase
 	    if(this.properties.getTableColumnCase().equalsIgnoreCase("uppercase")) {
 	        MapperMetadata.TABLE_COLUMN_CASE = CASE_TYPE.UPPERCASE;
@@ -168,6 +169,9 @@ public class MybatisAutoConfiguration implements InitializingBean {
 	  	}else {
 	    	MapperMetadata.TABLE_COLUMN_CASE = CASE_TYPE.LOWERCASE;
 	    }
+    }else {
+    	MapperMetadata.TABLE_COLUMN_CASE = CASE_TYPE.LOWERCASE;
+    }
     
     if(this.properties.getTableColumnSnowflakeDatacenterId()>0 && 
     		this.properties.getTableColumnSnowflakeMachineId()>0) {