Can You Execute MySQL Queries with SET Variables in Go?

MySQL Queries with SET Variables in Go

In Go, utilizing SET variables prior to executing a MySQL query can enhance the query efficiency by declaring variable values and performing calculations before the query itself.

Problem

An attempt to run a query with SET variables resulted in a syntax error at the SELECT statement. The query executed flawlessly on the console but encountered issues when executed through Go. The user questioned the feasibility of such a query and sought a resolution.

Solution

The issue was resolved by incorporating two key modifications:

1. DSN Settings: The DSN (Data Source Name) used for connecting to the MySQL database required the inclusion of the following parameters:

   • multiStatements=true: Allows the execution of multiple queries within a single connection.
   • interpolateParams=true: Enables the interpolation of parameters within SQL statements.
2. Collation Conversion: The database and its tables had to be converted from utf8mb4_0900_ai_ci to utf8mb4_general_ci collation to resolve an error related to collation mismatch.

Conclusion

By incorporating the specified DSN parameters and ensuring compatibility in collation settings, the query with SET variables successfully executed in Go. The user avoided the cumbersome approach of duplicating parameters and achieved enhanced query efficiency.

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