fix rename table ddl parser tablename and schemaname error

parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/dbsync/SimpleDdlParser.java

@@ -31,8 +31,9 @@ public class SimpleDdlParser {
     public static final String INSERT_PATTERN         = "^\\s*(INSERT|MERGE|REPLACE)(.*)$";
     public static final String UPDATE_PATTERN         = "^\\s*UPDATE(.*)$";
     public static final String DELETE_PATTERN         = "^\\s*DELETE(.*)$";
-    public static final String RENAME_PATTERN         = "^\\s*RENAME\\s*TABLE\\s*(.*?)\\s*TO\\s*(.*?)$";
-    public static final String RENAME_REMNANT_PATTERN = "^\\s*(.*?)\\s*TO\\s*(.*?)$";
+    public static final String RENAME_PATTERN         = "^\\s*RENAME\\s+TABLE\\s+(.+?)\\s+TO\\s+(.+?)$";
+    public static final String RENAME_REMNANT_PATTERN = "^\\s*(.+?)\\s+TO\\s+(.+?)$";
+
     /**
      * <pre>
      * CREATE [UNIQUE|FULLTEXT|SPATIAL] INDEX index_name

parse/src/test/java/com/alibaba/otter/canal/parse/inbound/mysql/SimpleDdlParserTest.java

@@ -163,6 +163,47 @@ public class SimpleDdlParserTest {
         Assert.assertEquals("retl3", result.getSchemaName());
         Assert.assertEquals("retl_mark1", result.getOriTableName());
         Assert.assertEquals("retl_mark3", result.getTableName());
+
+        //正则匹配test case
+
+        queryString = "rename table totl_mark to totl_mark2";
+        result = SimpleDdlParser.parse(queryString, "retl");
+        Assert.assertNotNull(result);
+        Assert.assertEquals("retl", result.getOriSchemaName());
+        Assert.assertEquals("retl", result.getSchemaName());
+        Assert.assertEquals("totl_mark", result.getOriTableName());
+        Assert.assertEquals("totl_mark2", result.getTableName());
+
+        queryString = "rename table totl.retl_mark to totl2.retl_mark2";
+        result = SimpleDdlParser.parse(queryString, "retl");
+        Assert.assertNotNull(result);
+        Assert.assertEquals("totl", result.getOriSchemaName());
+        Assert.assertEquals("totl2", result.getSchemaName());
+        Assert.assertEquals("retl_mark", result.getOriTableName());
+        Assert.assertEquals("retl_mark2", result.getTableName());
+
+        queryString = "rename \n table \n `totl`.`retl_mark` to `totl2.retl_mark2`;";
+        result = SimpleDdlParser.parse(queryString, "retl");
+        Assert.assertNotNull(result);
+        Assert.assertEquals("totl", result.getOriSchemaName());
+        Assert.assertEquals("totl2", result.getSchemaName());
+        Assert.assertEquals("retl_mark", result.getOriTableName());
+        Assert.assertEquals("retl_mark2", result.getTableName());
+
+        queryString = "rename \n table \n `totl`.`retl_mark` to `totl2.retl_mark2` , `totl1`.`retl_mark1` to `totl3.retl_mark3`;";
+        result = SimpleDdlParser.parse(queryString, "retl");
+        Assert.assertNotNull(result);
+        Assert.assertEquals("totl", result.getOriSchemaName());
+        Assert.assertEquals("totl2", result.getSchemaName());
+        Assert.assertEquals("retl_mark", result.getOriTableName());
+        Assert.assertEquals("retl_mark2", result.getTableName());
+        result = result.getRenameTableResult();
+        Assert.assertNotNull(result);
+        Assert.assertEquals("totl1", result.getOriSchemaName());
+        Assert.assertEquals("totl3", result.getSchemaName());
+        Assert.assertEquals("retl_mark1", result.getOriTableName());
+        Assert.assertEquals("retl_mark3", result.getTableName());
+
     }
 
     @Test