db2struct 
The db2struct package produces a usable golang struct from a given database table for use in a .go file.
By reading details from the database about the column structure, db2struct generates a go compatible struct type
with the required column names, data types, and annotations.
Generated datatypes include support for nullable columns sql.NullX types or guregu null.X types
and the expected basic built in go types.
Db2Struct is based/inspired by the work of ChimeraCoder's gojson package
gojson
Usage
go get github.com/Shelnutt2/db2struct/cmd/db2struct
db2struct --host localhost -d test -t test_table --package myGoPackage --struct testTable -p --user testUser
Example
MySQL table named users with four columns: id (int), user_name (varchar(255)), number_of_logins (int(11),nullable), and LAST_NAME (varchar(255), nullable)
Example below uses guregu's null package, but without the option it procuded the sql.NullInt64 and so on.
db2struct --host localhost -d example.com -t users --package example --struct user -p --user exampleUser --guregu --gorm
Output:
package example
type User struct {
ID int `gorm:"column:id"`
UserName string `gorm:"column:user_name"`
NumberOfLogins null.Int `gorm:"column:number_of_logins"`
LastName null.String `gorm:"column:LAST_NAME"`
}
Supported Databases
Currently Supported
- MariaDB
- MySQL
Planned Support
- PostgreSQL
- Oracle
- Microsoft SQL Server
MariaDB/MySQL
Structures are created by querying the INFORMATION_SCHEMA.Columns table and then formatting the types, column names,
and metadata to create a usable go compatible struct type.
Supported Datatypes
Currently only a limited number of MariaDB/MySQL datatypes are supported. Initial support includes:
- tinyint (sql.NullInt64 or null.Int)
- int (sql.NullInt64 or null.Int)
- smallint (sql.NullInt64 or null.Int)
- mediumint (sql.NullInt64 or null.Int)
- bigint (sql.NullInt64 or null.Int)
- decimal (sql.NullFloat64 or null.Float)
- float (sql.NullFloat64 or null.Float)
- double (sql.NullFloat64 or null.Float)
- datetime (null.Time)
- time (null.Time)
- date (null.Time)
- timestamp (null.Time)
- var (sql.String or null.String)
- enum (sql.String or null.String)
- varchar (sql.String or null.String)
- longtext (sql.String or null.String)
- mediumtext (sql.String or null.String)
- text (sql.String or null.String)
- tinytext (sql.String or null.String)
- binary
- blob
- longblob
- mediumblob
- varbinary
- json