improved oracle sql parser support CreateSequence. issue #1923

src/main/java/com/alibaba/druid/sql/ast/statement/SQLCreateSequenceStatement.java

@@ -38,6 +38,8 @@ public class SQLCreateSequenceStatement extends SQLStatementImpl implements SQLD
 
     private Boolean cycle;
     private Boolean cache;
+    private SQLExpr cacheValue;
+
     private Boolean order;
 
     @Override
@@ -144,4 +146,15 @@ public class SQLCreateSequenceStatement extends SQLStatementImpl implements SQLD
 
         return null;
     }
+
+    public SQLExpr getCacheValue() {
+        return cacheValue;
+    }
+
+    public void setCacheValue(SQLExpr cacheValue) {
+        if (cacheValue != null) {
+            cacheValue.setParent(this);
+        }
+        this.cacheValue = cacheValue;
+    }
 }

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleStatementParser.java

@@ -2159,11 +2159,23 @@ public class OracleStatementParser extends SQLStatementParser {
             } else if (lexer.token() == Token.CACHE) {
                 lexer.nextToken();
                 stmt.setCache(Boolean.TRUE);
+
+                if (lexer.token() == Token.LITERAL_INT) {
+                    stmt.setCacheValue(this.exprParser.primary());
+                }
                 continue;
             } else if (lexer.token() == Token.NOCACHE) {
                 lexer.nextToken();
                 stmt.setCache(Boolean.FALSE);
                 continue;
+            } else if (lexer.token() == Token.ORDER) {
+                lexer.nextToken();
+                stmt.setOrder(Boolean.TRUE);
+                continue;
+            } else if (identifierEquals("NOORDER")) {
+                lexer.nextToken();
+                stmt.setOrder(Boolean.FALSE);
+                continue;
             } else if (identifierEquals("CYCLE")) {
                 lexer.nextToken();
                 stmt.setCycle(Boolean.TRUE);

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -4444,14 +4444,30 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
             }
         }
 
-        if (x.getCache() != null) {
-            if (x.getCache().booleanValue()) {
+        Boolean cache = x.getCache();
+        if (cache != null) {
+            if (cache.booleanValue()) {
                 print0(ucase ? " CACHE" : " cache");
+
+                SQLExpr cacheValue = x.getCacheValue();
+                if (cacheValue != null) {
+                    print(' ');
+                    cacheValue.accept(this);
+                }
             } else {
                 print0(ucase ? " NOCACHE" : " nocache");
             }
         }
 
+        Boolean order = x.getOrder();
+        if (order != null) {
+            if (order.booleanValue()) {
+                print0(ucase ? " ORDER" : " order");
+            } else {
+                print0(ucase ? " NOORDER" : " noorder");
+            }
+        }
+
         return false;
     }