fix #4164

src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/MySqlPrimaryKey.java

@@ -22,7 +22,7 @@ import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitor;
 public class MySqlPrimaryKey extends MySqlKey implements SQLPrimaryKey {
 
     public MySqlPrimaryKey(){
-        dbType = DbType.oracle;
+        dbType = DbType.mysql;
     }
 
     protected void accept0(MySqlASTVisitor visitor) {

src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/MysqlForeignKey.java

@@ -32,7 +32,7 @@ public class MysqlForeignKey extends SQLForeignKeyImpl {
     protected Option onDelete;
 
     public MysqlForeignKey() {
-        dbType = DbType.oracle;
+        dbType = DbType.mysql;
     }
 
     public SQLName getIndexName() {

src/main/resources/META-INF/druid/parser/hive/builtin_datatypes

@@ -0,0 +1,23 @@
+TINYINT
+SMALLINT
+MEDIUMINT
+INT
+INTEGER
+BIGINT
+DECIMAL
+NUMERIC
+FLOAT
+DOUBLE
+DATE
+DATETIME
+TIMESTAMP
+INTERVAL
+STRING
+VARCHAR
+CHAR
+BOOLEAN
+BINARY
+ARRAY
+MAP
+STRUCT
+UNIONTYPE