skip mysql algorithm key at partition and subpartition

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

@@ -26,7 +26,16 @@ import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitor;
 import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 
 public class MySqlPartitionByKey extends SQLPartitionBy implements MySqlObject {
+    private short algorithm = 2;
 
+    public short getAlgorithm() {
+        return algorithm;
+    }
+
+    public void setAlgorithm(short algorithm) {
+        this.algorithm = algorithm;
+    }
+    
     @Override
     protected void accept0(SQLASTVisitor visitor) {
         if (visitor instanceof MySqlASTVisitor) {
@@ -54,6 +63,7 @@ public class MySqlPartitionByKey extends SQLPartitionBy implements MySqlObject {
             c2.setParent(x);
             x.columns.add(c2);
         }
+	x.setAlgorithm(algorithm);
     }
 
     public MySqlPartitionByKey clone() {

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

@@ -27,6 +27,15 @@ import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 public class MySqlSubPartitionByKey extends SQLSubPartitionBy implements MySqlObject {
 
     private List<SQLName> columns = new ArrayList<SQLName>();
+    private short algorithm = 2;
+
+    public short getAlgorithm() {
+        return algorithm;
+    }
+
+    public void setAlgorithm(short algorithm) {
+        this.algorithm = algorithm;
+    }
 
     @Override
     protected void accept0(SQLASTVisitor visitor) {
@@ -64,6 +73,7 @@ public class MySqlSubPartitionByKey extends SQLSubPartitionBy implements MySqlOb
             c2.setParent(x);
             x.columns.add(c2);
         }
+	x.setAlgorithm(algorithm);
     }
 
     public MySqlSubPartitionByKey clone() {

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java

@@ -454,6 +454,13 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
                         clause.setLinear(true);
                     }
 
+                    if (lexer.token() == Token.ALGORITHM) {
+                        lexer.nextToken();
+                        accept(Token.EQ);
+                        clause.setAlgorithm(lexer.integerValue().shortValue());
+                        lexer.nextToken();
+                    }
+
                     accept(Token.LPAREN);
                     if (lexer.token() != Token.RPAREN) {
                         for (;;) {
@@ -635,6 +642,13 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
                     clause.setLinear(true);
                 }
 
+                if (lexer.token() == Token.ALGORITHM) {
+                    lexer.nextToken();
+                    accept(Token.EQ);
+                    subPartitionKey.setAlgorithm(lexer.integerValue().shortValue());
+                    lexer.nextToken();
+                }
+
                 accept(Token.LPAREN);
                 for (;;) {
                     subPartitionKey.addColumn(this.exprParser.name());

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java

@@ -35,6 +35,7 @@ public class MySqlLexer extends Lexer {
 
         map.putAll(Keywords.DEFAULT_KEYWORDS.getKeywords());
 
+	map.put("ALGORITHM", Token.ALGORITHM);
         map.put("DUAL", Token.DUAL);
         map.put("FALSE", Token.FALSE);
         map.put("IDENTIFIED", Token.IDENTIFIED);

src/main/java/com/alibaba/druid/sql/parser/Token.java

@@ -125,6 +125,7 @@ public enum Token {
     KILL("KILL"),
     IDENTIFIED("IDENTIFIED"),
     PASSWORD("PASSWORD"),
+    ALGORITHM("ALGORITHM"),
     DUAL("DUAL"),
     BINARY("BINARY"),
     SHOW("SHOW"),