5. ClustrixDB SQL语法

CustrixDB支持的DML语法

SELECT, DISTINCT, [LEFT | RIGHT | OUTER] JOIN, STRAIGHT_JOIN UNION, HAVING, GROUP BY, LIMIT, ASC, DESC, ORDER BY, FOR UPDATE Subqueries, including with IN EXISTS, NOT EXISTS INSERT, INSERT... ON DUPLICATE KEY UPDATE, UPDATE, DELETE, REPLACE INTO CREATE, DROP, TRUNCATE, AUTO_INCREMENT LOAD DATA INFILE START TRANSACTION, COMMIT, ROLLBACK, PREPARE COUNT(), AVG(), STD(), SUM(), MAX(), MIN(), GROUP_CONCAT()

还支持

Foreign Keys Data Types EXPLAIN Partitioned Tables (RANGE only) MySQL Replication Stored Routines Triggers

ClustrixDB不支持的DML语句

ASC or DESC qualifier for GROUP BY; instead, for ordered output, ORDER BY must be explicit. For example: select a,count(*) from foo group by 1 desc; -- will give a syntax error select a,count(*) from foo group by 1 order by desc; -- OK COLLATE in SELECT CUBE EXCEPT IGNORE keyword as part of a DELETE statement INTERSECT LOCK TABLES statement NOT in conjunction with user-defined variables that reference a function, e.g. SET @a = not foo(); ROLLUP SELECT INTO ... OUTFILE option. Use mysql -e "SELECT ..." > file_name instead. Subqueries with ALL or SOME

 

导出数据：

clxm@p2cn1uclx101m_10.248.100.241 ~]$ mysql -uroot -e 'select * from scloud.sbtest1 where id < 10 order by id' -N > outfile.log 

 

导入数据：

MySQL [test]> load data infile  '/home/clxm/outfile.log' into table sbtest1;

支持管理SQL语句

ANALYZE TABLE EXPLAIN and EXPLAIN REFERENCED OPTIMIZE TABLE ClustrixDB supports the syntax for OPTIMIZE TABLE, but does not perform any operation. ClustrixDB uses background processes to automatically optimize storage. REPAIR TABLE SHOW BINARY LOGS SHOW CHARACTER SET (with no WHERE clause) SHOW COLLATION SHOW COLUMNS SHOW CREATE [DATABASE | TABLE | FUNCTION | TRIGGER | SEQUENCE | VIEW] SHOW DATABASES SHOW ENGINES For compatibility, ClustrixDB lists InnoDB as part of the output of SHOW ENGINES, but the Clustrix engine will always be applied. Not all engines are listed as output of SHOW. See ENGINES for more information. SHOW GRANTS SHOW INDEX SHOW MASTER STATUS SHOW OPEN TABLES SHOW PROCESSLIST SHOW SLAVE HOSTS SHOW STATUS SHOW TABLES SHOW TRIGGER SHOW WARNINGS The syntax for SHOW WARNINGS is supported, but no warnings are ever displayed. SHOW VARIABLES

不支持的SQL管理语句

CHECKSUM TABLE FLUSH SHOW AUTHORS SHOW BINLOG EVENTS SHOW CLIENT STATISTICS SHOW COLUMNS with WHERE clauses SHOW CREATE USER SHOW CONTRIBUTORS SHOW ERRORS SHOW EVENTS SHOW EXPLAIN FOR SHOW FUNCTION [CODE | STATUS] SHOW INDEX STATISTICS SHOW LOCALES SHOW MASTER LOGS SHOW PLUGINS SHOW PRIVILEGES SHOW PROFILE SHOW PROCEDURE [CODE | STATUS] SHOW QUERY_RESPONSE_TIME SHOW TABLE_STATISTICS SHOW USER_STATISTICS

支持的函数和操作符

:=
!
!=
*
/
&
&&
%
^
+
<
<<
<=
<=>
=
=
>
>=
>>
|
||
~ ABS ACOS ADDDATE ADDTIME AES_DECRYPT AES_ENCRYPT ASCII ASIN ATAN ATAN2 AVG BETWEEN AND If one of the values being compared for BETWEEN is NULL, ClustrixDB will return NULL BIN BINARY OPERATOR BIT_AND BIT_COUNT BIT_LENGTH BIT_OR BIT_XOR CASE CAST CEIL CEILING CHAR Function CHAR_LENGTH CHARACTER_LENGTH CHARSET COALESCE COMPRESS CONCAT CONCAT_WS CONNECTION_ID CONTAINS CONV CONVERT CONVERT_TZ COS COT COUNT ClustrixDB allows multiple inputs to the COUNT() function, where some versions of MySQL and MariaDB do not ClustrixDB will include trailing NULL values in the results of COUNT(), while MySQL does not COUNT DISTINCT CRC32 CURDATE CURRENT_DATE CURRENT_ROLE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURTIME DATABASE DATE FUNCTION DATE_ADD DATE_FORMAT DATE_SUB DATEDIFF DAY DAYNAME DAYOFMONTH DAYOFWEEK DAYOFYEAR DECODE DIV ELT ENCODE ENCRYPT EQUALS EXP EXPORT_SET FIELD FIND_IN_SET FLOOR FORMAT FOUND_ROWS FROM_BASE64 FROM_DAYS FROM_UNIXTIME GET_FORMAT GET_LOCK Use of GET_LOCK with Statement-based Replication is considered unsafe, though ClustrixDB does not raise an error. MySQL raises an error. GREATEST GROUP_CONCAT Multiple GROUP_CONCAT statements are supported, but only one ORDER BY is allowed per select statement HEX HOUR IF IFNULL IN INSERT Function INSTR INTERVAL IS IS NOT IS NOT NULL IS NULL IS_FREE_LOCK IS_USED_LOCK ISNULL JSON_ARRAY JSON_CONTAINS_PATH JSON_DEPTH JSON_EXTRACT JSON_KEYS JSON_LENGTH JSON_OBJECT JSON_QUOTE JSON_SEARCH JSON_TYPE JSON_UNQUOTE JSON_VALID LAST_DAY LAST_INSERT_ID LAST_VALUE LCASE LEAST LEFT LENGTH LIKE LINESTRING LN LOCALTIME LOCALTIMESTAMP LOCATE In ClustrixDB, LOCATE() returns NULL when position is provided as NULL. MySQL returns 0 in such instances. LOG LOG10 LOG2 LOWER LPAD LTRIM MAKE_SET MAKEDATE MAKETIME MAX MD5 MICROSECOND MID MIN MINUTE MOD MONTH MONTHNAME NAME_CONST NEXTVAL NOT BETWEEN NOT IN NOT LIKE NOT REGEXP NOW NULLIF OCT ORD PASSWORD PERCENT_RANK PERIOD_ADD The results of this function do not match MySQL when year boundaries are being crossed or approached. PERIOD_DIFF PI POW POWER QUARTER QUOTE RADIANS RAND Does not accept an argument as seed. RANK REGEXP RELEASE_LOCK REPEAT Function REPLACE Function REVERSE RIGHT RLIKE ROUND ROW_COUNT When updating a row, if the values are not being changed (e.g. (1,1) → (1,1)) mysql reports 0, ClustrixDB returns 1 When replacing a row with an identical row, mysql reports 1, ClustrixDB returns 2 On ClustrixDB, ROW_COUNT does not reflect the number of rows affected by a stored procedure ROW_COUNT does not match mysql behavior for DDL (e.g. CREATE TABLE then SELECT ROW_COUNT) When committing an explicit transaction, ClustrixDB reports the ROW_COUNT() value for the most recent statement before the COMMIT. In other words, row_count behaves as if there was no COMMIT. ROW_NUMBER RPAD RTRIM SCHEMA SEC_TO_TIME SECOND SESSION_USER SHA SHA1 SHA2 SIGN SIN SLEEP SQRT STD STDDEV STDDEV_POP STDDEV_SAMP STR_TO_DATE STRCMP SUBDATE SUBSTR SUBSTRING SUBSTRING_INDEX SUBTIME SUM SYSDATE Does not reflect time zone settings; always returns UTC. SYSTEM_USER TAN TIME function TIME_FORMAT TIME_TO_SEC TIMEDIFF TIMESTAMP FUNCTION TIMESTAMPADD TIMESTAMPDIFF TO_BASE64 TO_DAYS TO_SECONDS TRIM TRUNCATE UCASE UNCOMPRESS UNCOMPRESSED_LENGTH UNHEX UNIX_TIMESTAMP UPPER USER UTC_DATE UTC_TIME UTC_TIMESTAMP UUID UUID_SHORT VALUES or VALUE VAR_POP VAR_SAMP VARIANCE VERSION WEEK WEEKDAY WEEKOFYEAR XOR YEAR YEARWEEK

不支持的函数和操作符

ANALYSE() BENCHMARK() CHARSET() COERCIBILITY() COLLATION() CURRENT_USER() EXTRACT() GET_FORMAT() INET_ATON(), INET_NTOA(), INET6_ATON(), INET6_NTOA() IS_IPV4, IS_IPV4_COMPAT (), IS_IPV4_MAPPED (), IS_IPV6 () LOCK TABLES() LOAD_FILE() MAKEDATE() SESSION_USER() TO_SECONDS()

支持的DDL操作

ALTER CLUSTER DISTRIBUTE SLICES REPLICAS

不支持的DDL操作

ALTER TABLE...CONVERT CREATE SEQUENCE CREATE VIEW ... WITH CHECK OPTION