diff --git a/sqlTranslate/.idea/workspace.xml b/sqlTranslate/.idea/workspace.xml
index 5f9f115e8..02dd6433e 100644
--- a/sqlTranslate/.idea/workspace.xml
+++ b/sqlTranslate/.idea/workspace.xml
@@ -4,12 +4,8 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add Delete ast class">
-      <change afterPath="$PROJECT_DIR$/src/main/java/Document/Delete statement in Oracle" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/Generator/OpenGaussGenerator.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Generator/OpenGaussGenerator.java" 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/OracleParser.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Parser/OracleParser.java" afterDir="false" />
+    <list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add alter table grammar document">
+      <change afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/AlterTable/AlterNode.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -429,7 +425,21 @@
       <option name="project" value="LOCAL" />
       <updated>1726152030692</updated>
     </task>
-    <option name="localTasksCounter" value="47" />
+    <task id="LOCAL-00047" summary="add Delete">
+      <created>1726153009186</created>
+      <option name="number" value="00047" />
+      <option name="presentableId" value="LOCAL-00047" />
+      <option name="project" value="LOCAL" />
+      <updated>1726153009186</updated>
+    </task>
+    <task id="LOCAL-00048" summary="add alter table grammar document">
+      <created>1726153173228</created>
+      <option name="number" value="00048" />
+      <option name="presentableId" value="LOCAL-00048" />
+      <option name="project" value="LOCAL" />
+      <updated>1726153173228</updated>
+    </task>
+    <option name="localTasksCounter" value="49" />
     <servers />
   </component>
   <component name="Vcs.Log.Tabs.Properties">
@@ -444,8 +454,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="lexer" />
-    <MESSAGE value="AST node" />
     <MESSAGE value="add AST node" />
     <MESSAGE value="add functions" />
     <MESSAGE value="add parser function" />
@@ -469,7 +477,9 @@
     <MESSAGE value="add update ast class" />
     <MESSAGE value="add update convert rules" />
     <MESSAGE value="add Delete ast class" />
-    <option name="LAST_COMMIT_MESSAGE" value="add Delete ast class" />
+    <MESSAGE value="add Delete" />
+    <MESSAGE value="add alter table grammar document" />
+    <option name="LAST_COMMIT_MESSAGE" value="add alter table grammar document" />
   </component>
   <component name="XDebuggerManager">
     <watches-manager>
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterAddColumnNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterAddColumnNode.java
new file mode 100644
index 000000000..01930031b
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterAddColumnNode.java
@@ -0,0 +1,26 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterAddColumnNode extends ASTNode {
+    public AlterAddColumnNode(ASTNode node)
+    {
+        super(node);
+    }
+
+    public AlterAddColumnNode(List<Token> tokens)
+    {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterAddConstraintNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterAddConstraintNode.java
new file mode 100644
index 000000000..e070e5703
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterAddConstraintNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterAddConstraintNode extends ASTNode {
+    public AlterAddConstraintNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterAddConstraintNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterDropColumnNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterDropColumnNode.java
new file mode 100644
index 000000000..120116cfb
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterDropColumnNode.java
@@ -0,0 +1,25 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterDropColumnNode extends ASTNode {
+
+    public AlterDropColumnNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterDropColumnNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterDropConstraintNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterDropConstraintNode.java
new file mode 100644
index 000000000..b32ad2a67
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterDropConstraintNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterDropConstraintNode extends ASTNode {
+    public AlterDropConstraintNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterDropConstraintNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterEndNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterEndNode.java
new file mode 100644
index 000000000..447f7c089
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterEndNode.java
@@ -0,0 +1,26 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterEndNode extends ASTNode {
+    public AlterEndNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterEndNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString());
+        for (ASTNode child : getChildren())
+        {
+            child.visit(child, queryString);
+        }
+    }
+}
+
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterModifyColumnNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterModifyColumnNode.java
new file mode 100644
index 000000000..49a7d0f4e
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterModifyColumnNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterModifyColumnNode extends ASTNode {
+    public AlterModifyColumnNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterModifyColumnNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterNode.java
new file mode 100644
index 000000000..23c795a90
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterNode extends ASTNode {
+    public AlterNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterObjNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterObjNode.java
new file mode 100644
index 000000000..c1a06a720
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterObjNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterObjNode extends ASTNode {
+    public AlterObjNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterObjNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterRenameColumnNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterRenameColumnNode.java
new file mode 100644
index 000000000..8295026a7
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterRenameColumnNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterRenameColumnNode extends ASTNode {
+    public AlterRenameColumnNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterRenameColumnNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}
diff --git a/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterRenameTableNode.java b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterRenameTableNode.java
new file mode 100644
index 000000000..049fed275
--- /dev/null
+++ b/sqlTranslate/src/main/java/Parser/AST/AlterTable/AlterRenameTableNode.java
@@ -0,0 +1,24 @@
+package Parser.AST.AlterTable;
+
+import Lexer.Token;
+import Parser.AST.ASTNode;
+
+import java.util.List;
+
+public class AlterRenameTableNode extends ASTNode {
+    public AlterRenameTableNode(ASTNode node) {
+        super(node);
+    }
+
+    public AlterRenameTableNode(List<Token> tokens) {
+        super(tokens);
+    }
+
+    @Override
+    public void visit(ASTNode node, StringBuilder queryString) {
+        queryString.append(toString() + " ");
+        for (ASTNode child : getChildren())
+
+            child.visit(child, queryString);
+    }
+}