diff --git a/sqlTranslate/.idea/workspace.xml b/sqlTranslate/.idea/workspace.xml
index a584bd42b..2785af1da 100644
--- a/sqlTranslate/.idea/workspace.xml
+++ b/sqlTranslate/.idea/workspace.xml
@@ -4,15 +4,9 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add if elseif else endif document">
-      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/IFELSIF/ELSENode.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/IFELSIF/ELSIFConditionNode.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/IFELSIF/ElSIFActionNode.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/IFELSIF/EndIFNode.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/IFELSIF/IFActionNode.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/IFELSIF/IFConditionNode.java" afterDir="false" />
+    <list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add if elseif else endif ast classes">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/Lexer/OracleLexer.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Lexer/OracleLexer.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" />
@@ -110,13 +104,6 @@
       <option name="presentableId" value="Default" />
       <updated>1723106789329</updated>
     </task>
-    <task id="LOCAL-00016" summary="add function">
-      <created>1724487486717</created>
-      <option name="number" value="00016" />
-      <option name="presentableId" value="LOCAL-00016" />
-      <option name="project" value="LOCAL" />
-      <updated>1724487486717</updated>
-    </task>
     <task id="LOCAL-00017" summary="coding">
       <created>1724506701566</created>
       <option name="number" value="00017" />
@@ -453,7 +440,14 @@
       <option name="project" value="LOCAL" />
       <updated>1726236869087</updated>
     </task>
-    <option name="localTasksCounter" value="65" />
+    <task id="LOCAL-00065" summary="add if elseif else endif ast classes">
+      <created>1726238974056</created>
+      <option name="number" value="00065" />
+      <option name="presentableId" value="LOCAL-00065" />
+      <option name="project" value="LOCAL" />
+      <updated>1726238974056</updated>
+    </task>
+    <option name="localTasksCounter" value="66" />
     <servers />
   </component>
   <component name="Vcs.Log.Tabs.Properties">
@@ -468,7 +462,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="add some comments" />
     <MESSAGE value="add parseSelect" />
     <MESSAGE value="add join pattern" />
     <MESSAGE value="add join class" />
@@ -493,7 +486,8 @@
     <MESSAGE value="add view generate method" />
     <MESSAGE value="revise" />
     <MESSAGE value="add if elseif else endif document" />
-    <option name="LAST_COMMIT_MESSAGE" value="add if elseif else endif document" />
+    <MESSAGE value="add if elseif else endif ast classes" />
+    <option name="LAST_COMMIT_MESSAGE" value="add if elseif else endif ast classes" />
   </component>
   <component name="XDebuggerManager">
     <watches-manager>
diff --git a/sqlTranslate/src/main/java/Parser/OracleParser.java b/sqlTranslate/src/main/java/Parser/OracleParser.java
index bd4b5cdf4..b3a43d565 100644
--- a/sqlTranslate/src/main/java/Parser/OracleParser.java
+++ b/sqlTranslate/src/main/java/Parser/OracleParser.java
@@ -544,6 +544,19 @@ public class OracleParser {
         return root;
     }
 
+    /**
+     * IF condition1 THEN ...
+     * (ELSIF condition2 THEN ...)*
+     * [ELSE...]
+     * END IF;
+     * @param parseTokens should start with IF
+     */
+    public static ASTNode parseIFELSE(List<Token> parseTokens) {
+        //TODO: implement
+        return null;
+    }
+
+
     /**
      * CASE WHEN expr THEN expr [ELSE expr] END
      * @param parseTokens should start with CASE