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https://github.com/Syngnat/GoNavi.git
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8dbc97e466
- DataViewer 主键列元数据异步拉取，首屏数据优先渲染 - 查询页增加结果集最大行数限制，减少大表全量返回 - DBQuery 引入 Context 超时，降低长查询对 UI 的阻塞风险 - 查询行数设置持久化保存 Closes #48 Closes #49
435 lines
11 KiB
Go
435 lines
11 KiB
Go
package db
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import (
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"context"
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"database/sql"
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"fmt"
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"strings"
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"time"
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"GoNavi-Wails/internal/connection"
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"GoNavi-Wails/internal/logger"
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"GoNavi-Wails/internal/ssh"
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"GoNavi-Wails/internal/utils"
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_ "github.com/go-sql-driver/mysql"
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)
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type MySQLDB struct {
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conn *sql.DB
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pingTimeout time.Duration
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}
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func (m *MySQLDB) getDSN(config connection.ConnectionConfig) string {
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database := config.Database
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protocol := "tcp"
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address := fmt.Sprintf("%s:%d", config.Host, config.Port)
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if config.UseSSH {
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netName, err := ssh.RegisterSSHNetwork(config.SSH)
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if err == nil {
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protocol = netName
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address = fmt.Sprintf("%s:%d", config.Host, config.Port)
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} else {
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logger.Warnf("注册 SSH 网络失败，将尝试直连：地址=%s:%d 用户=%s，原因：%v", config.Host, config.Port, config.User, err)
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}
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}
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timeout := getConnectTimeoutSeconds(config)
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return fmt.Sprintf("%s:%s@%s(%s)/%s?charset=utf8mb4&parseTime=True&loc=Local&timeout=%ds",
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config.User, config.Password, protocol, address, database, timeout)
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}
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func (m *MySQLDB) Connect(config connection.ConnectionConfig) error {
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dsn := m.getDSN(config)
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db, err := sql.Open("mysql", dsn)
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if err != nil {
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return fmt.Errorf("打开数据库连接失败：%w", err)
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}
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m.conn = db
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m.pingTimeout = getConnectTimeout(config)
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// Force verification
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if err := m.Ping(); err != nil {
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return fmt.Errorf("连接建立后验证失败：%w", err)
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}
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return nil
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}
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func (m *MySQLDB) Close() error {
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if m.conn != nil {
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return m.conn.Close()
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}
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return nil
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}
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func (m *MySQLDB) Ping() error {
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if m.conn == nil {
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return fmt.Errorf("connection not open")
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}
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timeout := m.pingTimeout
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if timeout <= 0 {
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timeout = 5 * time.Second
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}
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ctx, cancel := utils.ContextWithTimeout(timeout)
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defer cancel()
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return m.conn.PingContext(ctx)
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}
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func (m *MySQLDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
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if m.conn == nil {
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return nil, nil, fmt.Errorf("connection not open")
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}
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rows, err := m.conn.QueryContext(ctx, query)
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if err != nil {
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return nil, nil, err
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}
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defer rows.Close()
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return scanRows(rows)
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}
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func (m *MySQLDB) Query(query string) ([]map[string]interface{}, []string, error) {
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if m.conn == nil {
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return nil, nil, fmt.Errorf("connection not open")
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}
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rows, err := m.conn.Query(query)
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if err != nil {
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return nil, nil, err
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}
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defer rows.Close()
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columns, err := rows.Columns()
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if err != nil {
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return nil, nil, err
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}
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var resultData []map[string]interface{}
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for rows.Next() {
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values := make([]interface{}, len(columns))
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valuePtrs := make([]interface{}, len(columns))
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for i := range columns {
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valuePtrs[i] = &values[i]
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}
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if err := rows.Scan(valuePtrs...); err != nil {
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continue
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}
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entry := make(map[string]interface{})
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for i, col := range columns {
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entry[col] = normalizeQueryValue(values[i])
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}
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resultData = append(resultData, entry)
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}
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return resultData, columns, nil
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}
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func (m *MySQLDB) ExecContext(ctx context.Context, query string) (int64, error) {
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if m.conn == nil {
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return 0, fmt.Errorf("connection not open")
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}
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res, err := m.conn.ExecContext(ctx, query)
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if err != nil {
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return 0, err
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}
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return res.RowsAffected()
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}
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func (m *MySQLDB) Exec(query string) (int64, error) {
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if m.conn == nil {
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return 0, fmt.Errorf("connection not open")
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}
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res, err := m.conn.Exec(query)
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if err != nil {
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return 0, err
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}
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return res.RowsAffected()
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}
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func (m *MySQLDB) GetDatabases() ([]string, error) {
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data, _, err := m.Query("SHOW DATABASES")
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if err != nil {
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return nil, err
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}
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var dbs []string
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for _, row := range data {
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if val, ok := row["Database"]; ok {
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dbs = append(dbs, fmt.Sprintf("%v", val))
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} else if val, ok := row["database"]; ok {
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dbs = append(dbs, fmt.Sprintf("%v", val))
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}
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}
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return dbs, nil
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}
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func (m *MySQLDB) GetTables(dbName string) ([]string, error) {
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query := "SHOW TABLES"
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if dbName != "" {
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query = fmt.Sprintf("SHOW TABLES FROM `%s`", dbName)
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}
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data, _, err := m.Query(query)
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if err != nil {
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return nil, err
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}
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var tables []string
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for _, row := range data {
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for _, v := range row {
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tables = append(tables, fmt.Sprintf("%v", v))
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break
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}
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}
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return tables, nil
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}
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func (m *MySQLDB) GetCreateStatement(dbName, tableName string) (string, error) {
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query := fmt.Sprintf("SHOW CREATE TABLE `%s`.`%s`", dbName, tableName)
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if dbName == "" {
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query = fmt.Sprintf("SHOW CREATE TABLE `%s`", tableName)
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}
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data, _, err := m.Query(query)
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if err != nil {
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return "", err
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}
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if len(data) > 0 {
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if val, ok := data[0]["Create Table"]; ok {
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return fmt.Sprintf("%v", val), nil
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}
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}
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return "", fmt.Errorf("create statement not found")
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}
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func (m *MySQLDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
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query := fmt.Sprintf("SHOW FULL COLUMNS FROM `%s`.`%s`", dbName, tableName)
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if dbName == "" {
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query = fmt.Sprintf("SHOW FULL COLUMNS FROM `%s`", tableName)
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}
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data, _, err := m.Query(query)
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if err != nil {
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return nil, err
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}
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var columns []connection.ColumnDefinition
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for _, row := range data {
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col := connection.ColumnDefinition{
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Name: fmt.Sprintf("%v", row["Field"]),
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Type: fmt.Sprintf("%v", row["Type"]),
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Nullable: fmt.Sprintf("%v", row["Null"]),
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Key: fmt.Sprintf("%v", row["Key"]),
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Extra: fmt.Sprintf("%v", row["Extra"]),
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Comment: fmt.Sprintf("%v", row["Comment"]),
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}
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if row["Default"] != nil {
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d := fmt.Sprintf("%v", row["Default"])
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col.Default = &d
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}
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columns = append(columns, col)
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}
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return columns, nil
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}
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func (m *MySQLDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
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query := fmt.Sprintf("SHOW INDEX FROM `%s`.`%s`", dbName, tableName)
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if dbName == "" {
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query = fmt.Sprintf("SHOW INDEX FROM `%s`", tableName)
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}
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data, _, err := m.Query(query)
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if err != nil {
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return nil, err
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}
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var indexes []connection.IndexDefinition
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for _, row := range data {
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nonUnique := 0
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if val, ok := row["Non_unique"]; ok {
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if f, ok := val.(float64); ok {
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nonUnique = int(f)
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} else if i, ok := val.(int64); ok {
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nonUnique = int(i)
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}
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}
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seq := 0
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if val, ok := row["Seq_in_index"]; ok {
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if f, ok := val.(float64); ok {
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seq = int(f)
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} else if i, ok := val.(int64); ok {
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seq = int(i)
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}
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}
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idx := connection.IndexDefinition{
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Name: fmt.Sprintf("%v", row["Key_name"]),
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ColumnName: fmt.Sprintf("%v", row["Column_name"]),
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NonUnique: nonUnique,
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SeqInIndex: seq,
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IndexType: fmt.Sprintf("%v", row["Index_type"]),
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}
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indexes = append(indexes, idx)
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}
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return indexes, nil
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}
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func (m *MySQLDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
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query := fmt.Sprintf(`SELECT CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME
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FROM information_schema.KEY_COLUMN_USAGE
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WHERE TABLE_SCHEMA = '%s' AND TABLE_NAME = '%s' AND REFERENCED_TABLE_NAME IS NOT NULL`, dbName, tableName)
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data, _, err := m.Query(query)
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if err != nil {
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return nil, err
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}
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var fks []connection.ForeignKeyDefinition
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for _, row := range data {
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fk := connection.ForeignKeyDefinition{
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Name: fmt.Sprintf("%v", row["CONSTRAINT_NAME"]),
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ColumnName: fmt.Sprintf("%v", row["COLUMN_NAME"]),
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RefTableName: fmt.Sprintf("%v", row["REFERENCED_TABLE_NAME"]),
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RefColumnName: fmt.Sprintf("%v", row["REFERENCED_COLUMN_NAME"]),
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ConstraintName: fmt.Sprintf("%v", row["CONSTRAINT_NAME"]),
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}
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fks = append(fks, fk)
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}
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return fks, nil
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}
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func (m *MySQLDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
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query := fmt.Sprintf("SHOW TRIGGERS FROM `%s` WHERE `Table` = '%s'", dbName, tableName)
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data, _, err := m.Query(query)
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if err != nil {
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return nil, err
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}
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var triggers []connection.TriggerDefinition
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for _, row := range data {
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trig := connection.TriggerDefinition{
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Name: fmt.Sprintf("%v", row["Trigger"]),
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Timing: fmt.Sprintf("%v", row["Timing"]),
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Event: fmt.Sprintf("%v", row["Event"]),
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Statement: fmt.Sprintf("%v", row["Statement"]),
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}
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triggers = append(triggers, trig)
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}
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return triggers, nil
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}
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func (m *MySQLDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
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if m.conn == nil {
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return fmt.Errorf("connection not open")
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}
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tx, err := m.conn.Begin()
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if err != nil {
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return err
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}
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defer tx.Rollback()
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// 1. Deletes
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for _, pk := range changes.Deletes {
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var wheres []string
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var args []interface{}
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for k, v := range pk {
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wheres = append(wheres, fmt.Sprintf("`%s` = ?", k))
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args = append(args, v)
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}
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if len(wheres) == 0 {
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continue
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}
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query := fmt.Sprintf("DELETE FROM `%s` WHERE %s", tableName, strings.Join(wheres, " AND "))
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if _, err := tx.Exec(query, args...); err != nil {
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return fmt.Errorf("delete error: %v", err)
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}
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}
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// 2. Updates
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for _, update := range changes.Updates {
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var sets []string
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var args []interface{}
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for k, v := range update.Values {
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sets = append(sets, fmt.Sprintf("`%s` = ?", k))
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args = append(args, v)
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}
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if len(sets) == 0 {
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continue
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}
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var wheres []string
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for k, v := range update.Keys {
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wheres = append(wheres, fmt.Sprintf("`%s` = ?", k))
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args = append(args, v)
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}
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if len(wheres) == 0 {
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return fmt.Errorf("update requires keys")
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}
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query := fmt.Sprintf("UPDATE `%s` SET %s WHERE %s", tableName, strings.Join(sets, ", "), strings.Join(wheres, " AND "))
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if _, err := tx.Exec(query, args...); err != nil {
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return fmt.Errorf("update error: %v", err)
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}
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}
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// 3. Inserts
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for _, row := range changes.Inserts {
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var cols []string
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var placeholders []string
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var args []interface{}
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for k, v := range row {
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cols = append(cols, fmt.Sprintf("`%s`", k))
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placeholders = append(placeholders, "?")
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args = append(args, v)
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}
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if len(cols) == 0 {
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continue
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}
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query := fmt.Sprintf("INSERT INTO `%s` (%s) VALUES (%s)", tableName, strings.Join(cols, ", "), strings.Join(placeholders, ", "))
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if _, err := tx.Exec(query, args...); err != nil {
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return fmt.Errorf("insert error: %v", err)
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}
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}
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return tx.Commit()
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}
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func (m *MySQLDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
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query := fmt.Sprintf("SELECT TABLE_NAME, COLUMN_NAME, COLUMN_TYPE FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '%s'", dbName)
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if dbName == "" {
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return nil, fmt.Errorf("database name required for GetAllColumns")
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}
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data, _, err := m.Query(query)
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if err != nil {
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return nil, err
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}
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var cols []connection.ColumnDefinitionWithTable
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for _, row := range data {
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col := connection.ColumnDefinitionWithTable{
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TableName: fmt.Sprintf("%v", row["TABLE_NAME"]),
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Name: fmt.Sprintf("%v", row["COLUMN_NAME"]),
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Type: fmt.Sprintf("%v", row["COLUMN_TYPE"]),
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}
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cols = append(cols, col)
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}
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return cols, nil
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}
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