diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/statement/MysqlAlterTableAlterCheck.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/statement/MysqlAlterTableAlterCheck.java
new file mode 100644
index 0000000000..ac5d04a022
--- /dev/null
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/statement/MysqlAlterTableAlterCheck.java
@@ -0,0 +1,38 @@
+package com.alibaba.druid.sql.dialect.mysql.ast.statement;
+
+import com.alibaba.druid.sql.ast.SQLName;
+import com.alibaba.druid.sql.ast.statement.SQLAlterTableItem;
+import com.alibaba.druid.sql.dialect.mysql.ast.MySqlObjectImpl;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitor;
+
+public class MysqlAlterTableAlterCheck extends MySqlObjectImpl implements SQLAlterTableItem {
+
+    private SQLName name;
+    private Boolean enforced;
+
+    @Override
+    public void accept0(MySqlASTVisitor visitor) {
+        if (visitor.visit(this)) {
+            if (getName() != null) {
+                getName().accept(visitor);
+            }
+        }
+        visitor.endVisit(this);
+    }
+
+    public SQLName getName() {
+        return name;
+    }
+
+    public void setName(SQLName name) {
+        this.name = name;
+    }
+
+    public Boolean getEnforced() {
+        return enforced;
+    }
+
+    public void setEnforced(Boolean enforced) {
+        this.enforced = enforced;
+    }
+}
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java
index 29506ee4a8..6923bcc9fd 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java
@@ -1550,6 +1550,9 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
             check.setExpr(expr);
             constraint = check;
 
+            boolean enforce = true;
+            //should find Token.NOT to recognize "NOT ENFORCED"
+            //but somehow Token.NOT eaten by "this.exprParser.expr()" in above code
             if (lexer.token() == Token.HINT) {
                 String hintText = lexer.stringVal();
                 if (hintText != null) {
@@ -1564,6 +1567,9 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
                     }
                     lexer.nextToken();
                 }
+            } else if (lexer.stringVal().equalsIgnoreCase("ENFORCED")) {
+                check.setEnforced(enforce);
+                lexer.nextToken();
             }
         }
 
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java
index 31398febb2..f0dfc08b94 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java
@@ -6021,13 +6021,14 @@ public class MySqlStatementParser extends SQLStatementParser {
                             lexer.nextToken();
                             if (lexer.token() == Token.IDENTIFIER) {
                                 constraintSymbol = this.exprParser.name();
-                                if (lexer.token() != Token.PRIMARY && lexer.token() != Token.UNIQUE && lexer.token() != Token.FOREIGN) {
+                                if (lexer.token() != Token.PRIMARY && lexer.token() != Token.UNIQUE && lexer.token() != Token.FOREIGN && lexer.token() != CHECK) {
                                     throw new ParserException("syntax error, expect PRIMARY, UNIQUE or FOREIGN, actual " + lexer.token() + ", " + lexer.info());
                                 }
                             }
                         case PRIMARY:
                         case UNIQUE:
                         case FOREIGN:
+                        case CHECK:
                             // Constraint.
                             if (lexer.token() == Token.FOREIGN) {
                                 MysqlForeignKey fk = this.getExprParser().parseForeignKey();
@@ -6054,21 +6055,29 @@ public class MySqlStatementParser extends SQLStatementParser {
                                 this.exprParser.parseIndex(uk.getIndexDefinition());
                                 SQLAlterTableAddConstraint item = new SQLAlterTableAddConstraint(uk);
                                 stmt.addItem(item);
+                            } else if (lexer.token() == Token.CHECK) { // ADD CHECK (expr)
+                                lexer.nextToken();
+                                accept(Token.LPAREN);
+                                SQLCheck check = new SQLCheck();
+                                if (null != constraintSymbol) {
+                                    check.setName(constraintSymbol);
+                                }
+                                check.setExpr(this.exprParser.expr());
+                                accept(Token.RPAREN);
+                                boolean enforce = true;
+                                if (lexer.token() == Token.NOT) {
+                                    enforce = false;
+                                    lexer.nextToken();
+                                }
+                                if (lexer.stringVal().equalsIgnoreCase("ENFORCED")) {
+                                    check.setEnforced(enforce);
+                                    lexer.nextToken();
+                                }
+                                SQLAlterTableAddConstraint item = new SQLAlterTableAddConstraint(check);
+                                stmt.addItem(item);
                             }
                             return true;
 
-                        // ADD CHECK (expr)
-                        case CHECK: {
-                            lexer.nextToken();
-                            accept(Token.LPAREN);
-                            SQLCheck check = new SQLCheck();
-                            check.setExpr(this.exprParser.expr());
-                            accept(Token.RPAREN);
-                            SQLAlterTableAddConstraint item = new SQLAlterTableAddConstraint(check);
-                            stmt.addItem(item);
-                            return true;
-                        }
-
                         // ADD PARTITION (partition_definition)
                         case PARTITION: {
                             lexer.nextToken();
@@ -6525,6 +6534,20 @@ public class MySqlStatementParser extends SQLStatementParser {
 
                     alterIndex.setAnalyzerName(this.exprParser.name());
                     stmt.addItem(alterIndex);
+                } else if (lexer.token() == Token.CHECK || lexer.token() == Token.CONSTRAINT) {
+                    lexer.nextToken();
+                    MysqlAlterTableAlterCheck check = new MysqlAlterTableAlterCheck();
+                    check.setName(this.exprParser.name());
+                    boolean enforce = true;
+                    if (lexer.token() == Token.NOT) {
+                        enforce = false;
+                        lexer.nextToken();
+                    }
+                    if (lexer.stringVal().equalsIgnoreCase("ENFORCED")) {
+                        check.setEnforced(enforce);
+                        lexer.nextToken();
+                    }
+                    stmt.addItem(check);
                 } else {
                     // ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}
                     if (lexer.token() == Token.COLUMN) {
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlASTVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlASTVisitor.java
index aa128a231f..b656778ed9 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlASTVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlASTVisitor.java
@@ -1443,4 +1443,12 @@ public interface MySqlASTVisitor extends SQLASTVisitor {
     default void endVisit(MySqlJSONTableExpr.Column x) {
 
     }
+
+    default boolean visit(MysqlAlterTableAlterCheck x) {
+        return true;
+    }
+
+    default void endVisit(MysqlAlterTableAlterCheck x) {
+
+    }
 } //
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java
index 57e757399e..b1e33500c9 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java
@@ -5519,4 +5519,27 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
 //        return false;
 //    }
 
+    public boolean visit(MysqlAlterTableAlterCheck x) {
+        print0(ucase ? "ALTER CONSTRAINT " : "alter constraint ");
+
+        SQLName name = x.getName();
+        if (name != null) {
+            name.accept(this);
+            print(' ');
+        }
+
+        Boolean enforced = x.getEnforced();
+        if (enforced != null) {
+            if (enforced) {
+                print0(ucase ? " ENFORCED" : " enforced");
+            } else {
+                print0(ucase ? " NOT ENFORCED" : " not enforced");
+            }
+        }
+        return false;
+    }
+
+    public void endVisit(MysqlAlterTableAlterCheck x) {
+
+    }
 } //