Merge branch 'mybatisGH-1158' of github.com:chb0github/mybatis-3 into mybatisGH-1158

* 'mybatisGH-1158' of github.com:chb0github/mybatis-3:
  MySQLSqlParser skip empty statements

Author: chb0github

src/main/java/org/apache/ibatis/parsing/sql/mysql/MySQLSqlParser.java

@@ -93,7 +93,14 @@ protected String readNextStatement() {
         sqlStatementBuilder = new MySQLSqlStatementBuilder(delimiter);
       }
     }
-    return sqlStatementBuilder.isEmpty() ? null : sqlStatementBuilder.getSqlStatement();
+    String retVal = null;
+    if(!sqlStatementBuilder.isEmpty()){
+      retVal = sqlStatementBuilder.getSqlStatement();
+      if(retVal.trim().isEmpty()){
+        retVal = readNextStatement();
+      }
+    }
+    return retVal;
   }
 
   private boolean isPreStatement(SqlStatementBuilder sqlStatementBuilder, String thisLine) {
@@ -119,4 +126,4 @@ private Delimiter extractNewDelimiterFromLine(String line) {
     return null;
   }
 
-}
+}