文档目录调整

入门指南/sequnce-sql.txt

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+DROP TABLE IF EXISTS MYCAT_SEQUENCE;  
+CREATE TABLE MYCAT_SEQUENCE (  name VARCHAR(50) NOT NULL,  current_value INT NOT NULL,  increment INT NOT NULL DEFAULT 100, PRIMARY KEY (name) ) ENGINE=InnoDB;
+
+-- ----------------------------
+-- Function structure for `mycat_seq_currval`
+-- ----------------------------
+DROP FUNCTION IF EXISTS `mycat_seq_currval`;
+DELIMITER ;;
+CREATE DEFINER=`root`@`%` FUNCTION `mycat_seq_currval`(seq_name VARCHAR(50)) RETURNS varchar(64) CHARSET latin1
+    DETERMINISTIC
+BEGIN  
+        DECLARE retval VARCHAR(64);
+        SET retval="-999999999,null";  
+        SELECT concat(CAST(current_value AS CHAR),",",CAST(increment AS CHAR) ) INTO retval   FROM MYCAT_SEQUENCE  WHERE name = seq_name;  
+        RETURN retval ; 
+END
+;;
+DELIMITER ;
+
+-- ----------------------------
+-- Function structure for `mycat_seq_nextval`
+-- ----------------------------
+DROP FUNCTION IF EXISTS `mycat_seq_nextval`;
+DELIMITER ;;
+CREATE DEFINER=`root`@`%` FUNCTION `mycat_seq_nextval`(seq_name VARCHAR(50)) RETURNS varchar(64) CHARSET latin1
+    DETERMINISTIC
+BEGIN  
+         UPDATE MYCAT_SEQUENCE  
+                 SET current_value = current_value + increment  WHERE name = seq_name;  
+         RETURN mycat_seq_currval(seq_name);  
+END
+;;
+DELIMITER ;
+
+-- ----------------------------
+-- Function structure for `mycat_seq_setval`
+-- ----------------------------
+DROP FUNCTION IF EXISTS `mycat_seq_setval`;
+DELIMITER ;;
+CREATE DEFINER=`root`@`%` FUNCTION `mycat_seq_setval`(seq_name VARCHAR(50), value INTEGER) RETURNS varchar(64) CHARSET latin1
+    DETERMINISTIC
+BEGIN  
+         UPDATE MYCAT_SEQUENCE  
+                   SET current_value = value  
+                   WHERE name = seq_name;  
+         RETURN mycat_seq_currval(seq_name);  
+END
+;;
+DELIMITER ;
+
+INSERT INTO MYCAT_SEQUENCE VALUES ('GLOBAL', 0, 100);
+SELECT MYCAT_SEQ_SETVAL('GLOBAL', 1);
+SELECT MYCAT_SEQ_CURRVAL('GLOBAL');
+SELECT MYCAT_SEQ_NEXTVAL('GLOBAL');
+
+

设计文档/mycat创建调用返回结果集的存储过程 (1).txt

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+
+1.在包含employee的分片上创建存储过程:
+/*!mycat: sql=select sharding_id from employee */ create procedure proc_rtn_list(in v_in int) begin select * from employee where sharding_id=v_in;end;
+
+2.调用存储过程, 通过注解指定在哪个分片上执行:
+/*!mycat: sql=select sharding_id from employee where sharding_id=10000*/  call proc_rtn_list(10000);
+
+3.出现问题：
+	"[Err] 1312 - PROCEDURE db1.proc_rtn_list can't return a result set in the given context"
+
+4.解决方案：修改代码 org.opencloudb.mysql.nio包内的MySQLConnection类, 取消第85行的注释.
+
+5.遗留问题:
+	调用存储过程后, 客户端没有收到相应的报文, 导致一直处于等待状态, 而不是正常的显示"mysql> "， 求大侠抓包解决， 看下mysql直连情况下，返回的这个报文跟Mycat的有哪些不同， 解决这个问题
+
+
+

设计文档/mycat同步实现的设计.txt

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