add toString()

sharding-core/sharding-core-rewrite/src/main/java/org/apache/shardingsphere/core/rewrite/placeholder/TablePlaceholder.java

@@ -21,6 +21,9 @@ import com.google.common.base.Joiner;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import org.apache.shardingsphere.core.parse.antlr.constant.QuoteCharacter;
+import org.apache.shardingsphere.core.route.type.TableUnit;
+
+import java.util.Map;
 
 /**
  * Table placeholder for rewrite.
@@ -40,4 +43,10 @@ public final class TablePlaceholder implements ShardingPlaceholder {
     public String toString() {
         return Joiner.on("").join(quoteCharacter.getStartDelimiter(), logicTableName, quoteCharacter.getEndDelimiter());
     }
+    
+    public String toString(final TableUnit tableUnit, final Map<String, String> logicAndActualTableMap) {
+        String actualTableName = logicAndActualTableMap.get(logicTableName);
+        actualTableName = null == actualTableName ? logicTableName : actualTableName;
+        return Joiner.on("").join(quoteCharacter.getStartDelimiter(), actualTableName, quoteCharacter.getEndDelimiter());
+    }
 }