The rule checks and alerts for usage of IF/IF..ELSE statements in stored procedure’s body. Avoid having conditional logic in a stored procedures, functions and triggers because it could confuse the SQL query optimizer and cause problems with parameter sniffing. ...
Syntax error on IF statement using stored procedure converted from MS-SQL to MySQL 2 getting error for if/else in a stored procedure 2 Stored Procedure using Where with if else 0 IF ELSE in SQL Server stored procedure 1 IF ELSE in Stored Procedure - Syntax Issue? 1 IF and ELSE in...
You can create a function in MySQL and create a conditionalIF ELSEstatement as follows: DELIMITER//CREATEFUNCTIONcompare(xINT,yINT)RETURNSTEXTDETERMINISTICBEGINDECLAREresultTEXT;IFx>yTHENSETresult=CONCAT(x," is larger than ",y);ELSESETresult=CONCAT(x," is smaller than ",y);ENDIF;RETURNresult;END...
7. ERROR 1314 (0A000): ALTER VIEW is not allowed in stored procedures //会报错的 1. 2. 3. 4. 5. 6. 7. mysql> create procedure test3() -> begin -> select * from aa_test; -> alter view aa_test as "select * from comment"; -> select * from aa_test; -> end;| ERROR 1...
1)、if-then-else 语句 CREATE DEFINER=`root`@`localhost` PROCEDURE `proc2`(IN `parameter`int) BEGIN declarevarint;setvar=parameter+1;ifvar=0then insert into t values(17); endif;ifparameter=0then update tsets1=s1+1;elseupdate tsets1=s1+2; ...
To define a statement block, use the control-of-flow keywordsBEGINandEND. Remarks AnIF...ELSEconstruct can be used in batches, in stored procedures, and in ad hoc queries. When this construct is used in a stored procedure, it's usually to test for the existence of some parameter. ...
在复杂的逻辑中,可能需要嵌套多个IF和ELSE语句。 在使用IF和ELSE语句时,要注意SQL语句的可读性和维护性。 参考链接 MySQL IF Statement MySQL Stored Procedures 通过上述示例和解释,你应该能够理解MySQL中IF和ELSE语句的基本用法和应用场景。如果你在实际应用中遇到问题,可以参考上述链接中的官方文档来获取更多帮助。
ID || '.' || CURRENT_VALUE; --拼接查询字符串 QUERY_ITEMS := QUERY_ITEMS || ',' || CURRENT_VALUE; END IF; ELSE CONDITIONS := CONDITIONS || ' = ' || ALIAS || '.' || CURRENT_VALUE || ' '; END IF; --循环值减1 SIGNS := SIGNS - 1; END LOOP; --拼接关联SQL TARGET_...
To define a statement block, use the control-of-flow keywords BEGIN and END.RemarksAn IF...ELSE construct can be used in batches, in stored procedures, and in ad hoc queries. When this construct is used in a stored procedure, it's usually to test for the existence of some parameter....
(*BaseBuilder).buildNodeExecNoAnalyze: return b.buildIfElseBlock(ctx, n, row) go/pkg/mod/github.com/dolthub/go-mysql-server@v0.18.2-0.20240529234304-47f89331b0ea/sql/rowexec/node_builder.gen.go:27 (0x293500f) com/dolthub/go-mysql-server/sql/rowexec.(*BaseBuilder).buildNodeExec: ...