diff --git a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropPartition.java b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropPartition.java
index 019c9d8bb2..a9fbd4ac36 100644
--- a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropPartition.java
+++ b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropPartition.java
@@ -24,7 +24,7 @@ import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 
 public class SQLAlterTableDropPartition extends SQLObjectImpl implements SQLAlterTableItem {
 
-    private boolean ifNotExists = false;
+    private boolean ifExists = false;
 
     private boolean purge;
 
@@ -41,12 +41,12 @@ public class SQLAlterTableDropPartition extends SQLObjectImpl implements SQLAlte
         this.partitions.add(partition);
     }
 
-    public boolean isIfNotExists() {
-        return ifNotExists;
+    public boolean isIfExists() {
+        return ifExists;
     }
 
-    public void setIfNotExists(boolean ifNotExists) {
-        this.ifNotExists = ifNotExists;
+    public void setIfExists(boolean ifExists) {
+        this.ifExists = ifExists;
     }
 
     public boolean isPurge() {
diff --git a/src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java b/src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java
index e7e92c67e2..53b9d9581e 100644
--- a/src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java
+++ b/src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java
@@ -30,7 +30,6 @@ import com.alibaba.druid.sql.ast.statement.*;
 import com.alibaba.druid.sql.ast.statement.SQLCreateTriggerStatement.TriggerEvent;
 import com.alibaba.druid.sql.ast.statement.SQLCreateTriggerStatement.TriggerType;
 import com.alibaba.druid.util.JdbcConstants;
-import org.apache.ibatis.jdbc.SQL;
 
 public class SQLStatementParser extends SQLParser {
 
@@ -1054,13 +1053,13 @@ public class SQLStatementParser extends SQLParser {
     public void parseAlterDrop(SQLAlterTableStatement stmt) {
         lexer.nextToken();
 
-        boolean ifNotExists = false;
+        boolean ifExists = false;
 
         if (lexer.token() == Token.IF) {
             lexer.nextToken();
-            accept(Token.NOT);
+
             accept(Token.EXISTS);
-            ifNotExists = true;
+            ifExists = true;
         }
 
         if (lexer.token() == Token.CONSTRAINT) {
@@ -1090,7 +1089,7 @@ public class SQLStatementParser extends SQLParser {
 
             stmt.addItem(item);
         } else if (lexer.token() == Token.PARTITION) {
-            SQLAlterTableDropPartition dropPartition = parseAlterTableDropPartition(ifNotExists);
+            SQLAlterTableDropPartition dropPartition = parseAlterTableDropPartition(ifExists);
 
             stmt.addItem(dropPartition);
         } else if (lexer.token() == Token.INDEX) {
@@ -1104,11 +1103,11 @@ public class SQLStatementParser extends SQLParser {
         }
     }
 
-    protected SQLAlterTableDropPartition parseAlterTableDropPartition(boolean ifNotExists) {
+    protected SQLAlterTableDropPartition parseAlterTableDropPartition(boolean ifExists) {
         lexer.nextToken();
         SQLAlterTableDropPartition dropPartition = new SQLAlterTableDropPartition();
 
-        dropPartition.setIfNotExists(ifNotExists);
+        dropPartition.setIfExists(ifExists);
 
         if (lexer.token() == Token.LPAREN) {
             accept(Token.LPAREN);
diff --git a/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
index e0b865b936..032e772b87 100644
--- a/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
@@ -2838,8 +2838,8 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
     @Override
     public boolean visit(SQLAlterTableDropPartition x) {
         print0(ucase ? "DROP " : "drop ");
-        if (x.isIfNotExists()) {
-            print0(ucase ? "IF NOT EXISTS " : "if not exists ");
+        if (x.isIfExists()) {
+            print0(ucase ? "IF EXISTS " : "if exists ");
         }
         print0(ucase ? "PARTITION " : "partition ");