diff --git a/sqlTranslate/.idea/workspace.xml b/sqlTranslate/.idea/workspace.xml
index 49395dcc..f14b0abc 100644
--- a/sqlTranslate/.idea/workspace.xml
+++ b/sqlTranslate/.idea/workspace.xml
@@ -6,9 +6,8 @@
   <component name="ChangeListManager">
     <list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add function">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/Main.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Main.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/main/java/Parser/AST/ASTNode.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/ASTNode.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/Parser/AST/CreateTable/ColumnNode.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/CreateTable/ColumnNode.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/Parser/OracleParser.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Parser/OracleParser.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -204,7 +203,14 @@
       <option name="project" value="LOCAL" />
       <updated>1724425628008</updated>
     </task>
-    <option name="localTasksCounter" value="15" />
+    <task id="LOCAL-00015" summary="add function">
+      <created>1724472081080</created>
+      <option name="number" value="00015" />
+      <option name="presentableId" value="LOCAL-00015" />
+      <option name="project" value="LOCAL" />
+      <updated>1724472081080</updated>
+    </task>
+    <option name="localTasksCounter" value="16" />
     <servers />
   </component>
   <component name="Vcs.Log.Tabs.Properties">
diff --git a/sqlTranslate/src/main/java/Main.java b/sqlTranslate/src/main/java/Main.java
index fc8e3791..c7211486 100644
--- a/sqlTranslate/src/main/java/Main.java
+++ b/sqlTranslate/src/main/java/Main.java
@@ -18,5 +18,6 @@ public class Main {
         OracleParser parser = new OracleParser(lexer);
         ASTNode root = parser.parse();
         System.out.println(root.toQueryString());
+        System.out.println(root.getASTString());
     }
 }
diff --git a/sqlTranslate/src/main/java/Parser/AST/ASTNode.java b/sqlTranslate/src/main/java/Parser/AST/ASTNode.java
index ed5bfdc9..5cc95157 100644
--- a/sqlTranslate/src/main/java/Parser/AST/ASTNode.java
+++ b/sqlTranslate/src/main/java/Parser/AST/ASTNode.java
@@ -121,8 +121,25 @@ public abstract class ASTNode {
     }
 
     public String getASTString() {
-        String str = "";
-        // TODO: implement
-        return str;
+        StringBuilder ASTString = new StringBuilder();
+        VisitAST(this, ASTString, 0);
+        return ASTString.toString();
+    }
+
+    private void VisitAST(ASTNode node, StringBuilder ASTString, int depth) {
+        addASTStructure(depth, ASTString);
+        ASTString.append(node.getClass() + ":" + node.toString() + "\n");
+        for (ASTNode child : node.getChildren()) {
+            if (child.getClass() == node.getClass())
+                VisitAST(child, ASTString, depth);
+            else
+                VisitAST(child, ASTString, depth + 1);
+        }
+    }
+
+    private void addASTStructure(int depth, StringBuilder ASTString) {
+        for (int i = 1; i <= depth; i++) {
+            ASTString.append("--");
+        }
     }
 }