使用限制

模式限制

Lindorm宽表Serverless模式下不支持SQL语法。

使用限制

• 不支持事务功能。
• 不支持HAVING、UDF、VIEW等操作。
• 支持SUM、AVG、MIN、MAX等函数。
• 有限支持ORDER BY ，请参见如何在较大结果集中使用ORDER BY。
• 有限支持GROUP BY、DISTINCT、JOIN等功能。由于Lindorm使用的是全内存计算，如果数据量过大，会导致集群清理整个堆空间（Full GC）或者内存溢出（OOM）。使用前请评估数据量级和集群配置是否能满足。
• 表名和列名区分大小写。

关键字使用说明

如果Lindorm宽表SQL语法中使用如下关键字，请添加反引号（`）进行转义，关键字不区分大小写。

ADD ADMIN_USER ADMIN_TRASH ALL ALLOW ALTER ANALYZE AND ANY ARRAY AS ASC ASYNC AT BERNOULLI BETWEEN BUILD BY CALL CALLED CASCADE CASE CAST CATALOGS COLUMN COLUMNS COMMENT COMMIT COMMITTED CONSTRAINT CREATE SEARCH SEARCH_QUERY INDEX INCLUDE CROSS CUBE CURRENT CURRENT_DATE CURRENT_ROLE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER DATA DATABASE DATABASES DATE DAY DEALLOCATE DEFINER DELETE DESC DESCRIBE DETERMINISTIC DISTINCT DISTRIBUTED DROP DUPLICATE ELSE END ESCAPE EXCEPT EXCLUDING EXECUTE EXISTS EXPLAIN EXTRACT EXTERNAL FALSE FILTER FILTERING FIRST FOLLOWING FOR FORCE FORMAT FROM FULL FUNCTION FUNCTIONS GLOBAL GRANT GRANTED GRANTS GRAPHVIZ GROUP GROUPING HAVING HOUR IF IDENTIFIED IGNORE IN INCLUDING INNER INPUT INSERT INTERSECT INTERVAL INTO INVOKER IO IS ISOLATION JSON JOIN KEY LANGUAGE LAST LATERAL LEFT LEVEL LIKE LIMIT LOCALTIME LOCALTIMESTAMP LOGICAL MAP MINUTE MONTH NAME NAMESPACE NAMESPACES NATURAL NFC NFD NFKC NFKD NO NONE NORMAL_USER NORMALIZE NOT NULL NULLIF NULLS OLDPASSWORD ON ONLY ONLINE OFFLINE OFFSET OPTION OR ORDER ORDINARILY OUTER OUTPUT OVER PARTITION PARTITIONS PASSWORD POSITION PRECEDING PREPARE PRIMARY PRIVILEGES PROPERTIES RANGE READ RECURSIVE RENAME REPEATABLE REPLACE RESET RESPECT RESTRICT RETURN RETURNS REVOKE RIGHT ROLE ROLES ROLLBACK ROLLUP ROW ROWS SCHEMA SCHEMAS SECOND SECURITY SELECT SERIALIZABLE SESSION SET SETS SHOW SOME SQL START STATS SUBSTRING SYSTEM TABLE TABLES TABLESAMPLE TEXT THEN TIME TIMESTAMP TO TRASH TRANSACTION TRUE TRY_CAST TRUNCATE TYPE UESCAPE UNBOUNDED UNCOMMITTED UNION UNNEST UPDATE UPSERT USE USER USERS USING VALIDATE VALUES VERBOSE VIEW WHEN WHERE WITH WORK WRITE YEAR ZONE