database/system.go

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// Package database ...
//
// Description : mysql ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022-05-15 19:32
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package database
import (
"fmt"
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"gorm.io/driver/mysql"
"git.zhangdeman.cn/zhangdeman/database/define"
"gorm.io/gorm"
)
// SystemDao 执行一些系统的mysql命令
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 19:32 2022/5/15
type SystemDao struct {
}
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// Connect 连接数据库
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:58 2023/4/9
func (sd *SystemDao) Connect(host string, port string, user string, password string, database string) (*gorm.DB, error) {
// db, err := gorm.Open("mysql", "root:root@(localhost)/gorm-test?charset=utf8mb4&parseTime=True&loc=Local")
conn := fmt.Sprintf("%v:%v@(%v:%v)/%v?charset=utf8mb4&parseTime=True&loc=Local", user, password, host, port, database)
return gorm.Open(mysql.Open(conn), &gorm.Config{})
}
// SelectDatabase 切换数据库
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:44 2023/4/9
func (sd *SystemDao) SelectDatabase(dbInstance *gorm.DB, database string) error {
return dbInstance.Raw("USE " + database).Error
}
// GetDatabaseList 获取数据库列表
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:46 2023/4/9
func (sd *SystemDao) GetDatabaseList(dbInstance *gorm.DB) ([]string, error) {
var (
err error
result []string
)
if err = dbInstance.Raw("SHOW DATABASES").Scan(&result).Error; nil != err {
return nil, err
}
return result, nil
}
// GetTableList 查询数据表
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 19:36 2022/5/15
func (sd *SystemDao) GetTableList(dbInstance *gorm.DB) ([]string, error) {
var (
err error
result []string
)
if err = dbInstance.Raw("SHOW TABLES").Scan(&result).Error; nil != err {
return nil, err
}
return result, nil
}
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// GetCreateTableSQL 获取建表SQL
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 20:58 2022/5/15
func (sd *SystemDao) GetCreateTableSQL(dbInstance *gorm.DB, table string) (string, error) {
var (
err error
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result map[string]any
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)
if err = dbInstance.Raw("SHOW CREATE TABLE `" + table + "`").Scan(&result).Error; nil != err {
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return "", err
}
return fmt.Sprintf("%v", result["Create Table"]), nil
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}
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// GetTableDesc 获取数据表的描述
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 22:37 2023/8/16
func (sd *SystemDao) GetTableDesc(dbInstance *gorm.DB, database string, tableName string) ([]*define.DescTableItem, error) {
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var (
err error
result []*define.DescTableItem
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)
if err = dbInstance.Raw("DESC `" + tableName + "`").Scan(&result).Error; nil != err {
return nil, err
}
// 查询comment信息
tableInfo, _ := sd.GetTableInfo(dbInstance, database, tableName)
tableInfoTable := make(map[string]string)
for _, item := range tableInfo {
tableInfoTable[item.ColumnName] = item.ColumnComment
}
for _, item := range result {
item.Comment = tableInfoTable[item.Field]
}
return result, nil
}
// GetTableInfo 查询别熬结构
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 23:10 2023/8/16
func (sd *SystemDao) GetTableInfo(dbInstance *gorm.DB, database string, tableName string) ([]*define.ColumnInfo, error) {
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var (
list []*define.ColumnInfo
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err error
)
err = dbInstance.Table("INFORMATION_SCHEMA.COLUMNS").Where(map[string]string{
"TABLE_SCHEMA": database,
"TABLE_NAME": tableName,
}).Scan(&list).Error
return list, err
}
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// CreateTable 创建数据表
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 16:34 2023/9/30
func (sd *SystemDao) CreateTable(dbInstance *gorm.DB, createTableSql string) error {
return sd.ExecuteSql(dbInstance, createTableSql)
}
// ExecuteSql 执行任意sql语句
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 16:35 2023/9/30
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func (sd *SystemDao) ExecuteSql(dbInstance *gorm.DB, anySql string, value ...any) error {
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return dbInstance.Exec(anySql, value...).Error
}