diff --git a/sqlTranslate/.idea/workspace.xml b/sqlTranslate/.idea/workspace.xml
index 43b9a0ac..c3343419 100644
--- a/sqlTranslate/.idea/workspace.xml
+++ b/sqlTranslate/.idea/workspace.xml
@@ -7,8 +7,6 @@
     <list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="coding">
       <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>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -232,7 +230,14 @@
       <option name="project" value="LOCAL" />
       <updated>1724507228242</updated>
     </task>
-    <option name="localTasksCounter" value="19" />
+    <task id="LOCAL-00019" summary="coding">
+      <created>1724510094392</created>
+      <option name="number" value="00019" />
+      <option name="presentableId" value="LOCAL-00019" />
+      <option name="project" value="LOCAL" />
+      <updated>1724510094392</updated>
+    </task>
+    <option name="localTasksCounter" value="20" />
     <servers />
   </component>
   <component name="Vcs.Log.Tabs.Properties">
diff --git a/sqlTranslate/src/main/java/Generator/OpenGaussGenerator.java b/sqlTranslate/src/main/java/Generator/OpenGaussGenerator.java
index ff0aa05c..d9eac9a3 100644
--- a/sqlTranslate/src/main/java/Generator/OpenGaussGenerator.java
+++ b/sqlTranslate/src/main/java/Generator/OpenGaussGenerator.java
@@ -36,9 +36,81 @@ public class OpenGaussGenerator {
     }
 
     private void ColumnTypeConvert(ColumnNode node) {
+        // type convert
         if (node.getType().getValue().equalsIgnoreCase("NUMBER")) {
             node.setType(new Token(Token.TokenType.KEYWORD, "NUMERIC"));
             node.ResetTokensbyNameTypeConstraint();
         }
+        if (node.getType().getValue().matches("(?i)NUMBER\\(.*?\\)")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, node.getType().getValue().replace("NUMBER", "DECIMAL")));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("VARCHAR2")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "VARCHAR"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+        if (node.getType().getValue().matches("(?i)VARCHAR2\\(.*?\\)")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, node.getType().getValue().replace("VARCHAR2", "VARCHAR")));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("RAW")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "BYTEA"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+        if (node.getType().getValue().matches("(?i)RAW\\(.*?\\)")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, node.getType().getValue().replace("RAW", "BYTEA")));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("BINARY_INTEGER")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "INTEGER"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("NCHAR")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "VARCHAR"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+        if (node.getType().getValue().matches("(?i)NCHAR\\(.*?\\)")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, node.getType().getValue().replace("NCHAR", "VARCHAR")));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("NVARCHAR2")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "VARCHAR"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+        if (node.getType().getValue().matches("(?i)NVARCHAR2\\(.*?\\)")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, node.getType().getValue().replace("NVARCHAR2", "VARCHAR")));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("NCLOB")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "TEXT"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("INTERVAL YEAR TO MONTH")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "INTERVAL"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        if (node.getType().getValue().equalsIgnoreCase("INTERVAL DAY TO SECOND")) {
+            node.setType(new Token(Token.TokenType.KEYWORD, "INTERVAL"));
+            node.ResetTokensbyNameTypeConstraint();
+        }
+
+        // Impossible to convert
+        if (
+                node.getType().getValue().equalsIgnoreCase("TIMESTAMP WITH LOCAL TIME ZONE") ||
+                        node.getType().getValue().equalsIgnoreCase("LONG RAW") ||
+                        node.getType().getValue().equalsIgnoreCase("ROWID") ||
+                        node.getType().getValue().equalsIgnoreCase("UROWID") ||
+                        node.getType().getValue().equalsIgnoreCase("REF CURSOR")
+        ) {
+            throw new GenerateFailedException("Unsupported type:" + node.getType().getValue() + "(OpenGauss doesn't support the keyword -- " + node.getType().getValue() + " or have any expression that keeps the same semantic!)");
+        }
     }
 }