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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
393 lines
11 KiB
Go
393 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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"net"
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"net/url"
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"strconv"
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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/ssh"
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"GoNavi-Wails/internal/utils"
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_ "github.com/sijms/go-ora/v2"
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)
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type OracleDB struct {
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conn *sql.DB
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pingTimeout time.Duration
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}
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func (o *OracleDB) getDSN(config connection.ConnectionConfig) string {
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// oracle://user:pass@host:port/service_name
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database := config.Database
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if database == "" {
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database = config.User // Default to user service/schema if empty?
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}
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if config.UseSSH {
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_, err := ssh.RegisterSSHNetwork(config.SSH)
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if err == nil {
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// Oracle driver might not support custom dialer via DSN easily without extra config
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// But go-ora v2 supports some advanced options.
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// For simplicity, we assume standard TCP or we might need a workaround for SSH.
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// go-ora v2 is pure Go, so we can potentially use a custom dialer if we manually open.
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// But for now, let's just use the address.
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// SSH tunneling via net.Dialer override is complex in sql.Open("oracle", ...).
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// We might need to forward a local port if using SSH.
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// Since ssh.RegisterSSHNetwork creates a custom network "ssh-via-...",
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// we need to see if go-ora supports custom networks.
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// Checking go-ora docs (simulated): It supports "unix" and "tcp".
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// We might need to map the custom network to a local proxy.
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// For now, we will assume direct connection or handle SSH separately later.
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// We'll leave the protocol implementation as is in MySQL for now, hoping go-ora uses standard net.Dial.
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// Note: go-ora connection string: oracle://user:pass@host:port/service
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// It parses host/port. It doesn't easily take a custom "network" parameter in URL.
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// We will proceed with standard TCP string.
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}
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}
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u := &url.URL{
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Scheme: "oracle",
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Host: net.JoinHostPort(config.Host, strconv.Itoa(config.Port)),
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Path: "/" + database,
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}
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u.User = url.UserPassword(config.User, config.Password)
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u.RawPath = "/" + url.PathEscape(database)
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return u.String()
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}
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func (o *OracleDB) Connect(config connection.ConnectionConfig) error {
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dsn := o.getDSN(config)
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db, err := sql.Open("oracle", 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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o.conn = db
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o.pingTimeout = getConnectTimeout(config)
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if err := o.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 (o *OracleDB) Close() error {
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if o.conn != nil {
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return o.conn.Close()
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}
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return nil
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}
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func (o *OracleDB) Ping() error {
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if o.conn == nil {
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return fmt.Errorf("connection not open")
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}
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timeout := o.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 o.conn.PingContext(ctx)
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}
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func (o *OracleDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
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if o.conn == nil {
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return nil, nil, fmt.Errorf("connection not open")
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}
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rows, err := o.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 (o *OracleDB) Query(query string) ([]map[string]interface{}, []string, error) {
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if o.conn == nil {
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return nil, nil, fmt.Errorf("connection not open")
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}
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rows, err := o.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 (o *OracleDB) ExecContext(ctx context.Context, query string) (int64, error) {
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if o.conn == nil {
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return 0, fmt.Errorf("connection not open")
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}
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res, err := o.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 (o *OracleDB) Exec(query string) (int64, error) {
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if o.conn == nil {
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return 0, fmt.Errorf("connection not open")
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}
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res, err := o.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 (o *OracleDB) GetDatabases() ([]string, error) {
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// Oracle treats Users/Schemas as "Databases" in this context
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data, _, err := o.Query("SELECT username FROM all_users ORDER BY username")
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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["USERNAME"]; 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 (o *OracleDB) GetTables(dbName string) ([]string, error) {
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// dbName is Schema/Owner
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query := "SELECT table_name FROM user_tables"
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if dbName != "" {
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query = fmt.Sprintf("SELECT owner, table_name FROM all_tables WHERE owner = '%s' ORDER BY table_name", strings.ToUpper(dbName))
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}
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data, _, err := o.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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if dbName != "" {
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if owner, okOwner := row["OWNER"]; okOwner {
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if name, okName := row["TABLE_NAME"]; okName {
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tables = append(tables, fmt.Sprintf("%v.%v", owner, name))
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continue
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}
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}
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}
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if val, ok := row["TABLE_NAME"]; ok {
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tables = append(tables, fmt.Sprintf("%v", val))
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}
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}
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return tables, nil
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}
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func (o *OracleDB) GetCreateStatement(dbName, tableName string) (string, error) {
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// Oracle provides DBMS_METADATA.GET_DDL
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// Note: LONG type might be tricky, but basic string scan should work for smaller DDLs
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query := fmt.Sprintf("SELECT DBMS_METADATA.GET_DDL('TABLE', '%s', '%s') as ddl FROM DUAL",
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strings.ToUpper(tableName), strings.ToUpper(dbName))
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if dbName == "" {
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query = fmt.Sprintf("SELECT DBMS_METADATA.GET_DDL('TABLE', '%s') as ddl FROM DUAL", strings.ToUpper(tableName))
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}
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data, _, err := o.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]["DDL"]; 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 (o *OracleDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
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query := fmt.Sprintf(`SELECT column_name, data_type, nullable, data_default
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FROM all_tab_columns
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WHERE owner = '%s' AND table_name = '%s'
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ORDER BY column_id`, strings.ToUpper(dbName), strings.ToUpper(tableName))
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if dbName == "" {
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query = fmt.Sprintf(`SELECT column_name, data_type, nullable, data_default
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FROM user_tab_columns
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WHERE table_name = '%s'
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ORDER BY column_id`, strings.ToUpper(tableName))
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}
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data, _, err := o.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["COLUMN_NAME"]),
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Type: fmt.Sprintf("%v", row["DATA_TYPE"]),
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Nullable: fmt.Sprintf("%v", row["NULLABLE"]),
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}
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if row["DATA_DEFAULT"] != nil {
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d := fmt.Sprintf("%v", row["DATA_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 (o *OracleDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
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query := fmt.Sprintf(`SELECT index_name, column_name, uniqueness
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FROM all_ind_columns
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JOIN all_indexes USING (index_name, owner)
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WHERE table_owner = '%s' AND table_name = '%s'`,
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strings.ToUpper(dbName), strings.ToUpper(tableName))
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if dbName == "" {
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query = fmt.Sprintf(`SELECT index_name, column_name, uniqueness
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FROM user_ind_columns
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JOIN user_indexes USING (index_name)
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WHERE table_name = '%s'`, strings.ToUpper(tableName))
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}
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data, _, err := o.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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unique := 1
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if val, ok := row["UNIQUENESS"]; ok && val == "UNIQUE" {
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unique = 0
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}
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idx := connection.IndexDefinition{
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Name: fmt.Sprintf("%v", row["INDEX_NAME"]),
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ColumnName: fmt.Sprintf("%v", row["COLUMN_NAME"]),
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NonUnique: unique,
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// SeqInIndex is harder to get in simple join, omitting or estimating
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IndexType: "BTREE", // Default assumption
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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 (o *OracleDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
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// Simplified query for FKs
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query := fmt.Sprintf(`SELECT a.constraint_name, a.column_name, c_pk.table_name r_table_name, b.column_name r_column_name
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FROM all_cons_columns a
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JOIN all_constraints c ON a.owner = c.owner AND a.constraint_name = c.constraint_name
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JOIN all_constraints c_pk ON c.r_owner = c_pk.owner AND c.r_constraint_name = c_pk.constraint_name
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JOIN all_cons_columns b ON c_pk.owner = b.owner AND c_pk.constraint_name = b.constraint_name AND a.position = b.position
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WHERE c.constraint_type = 'R' AND a.owner = '%s' AND a.table_name = '%s'`,
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strings.ToUpper(dbName), strings.ToUpper(tableName))
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data, _, err := o.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["R_TABLE_NAME"]),
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RefColumnName: fmt.Sprintf("%v", row["R_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 (o *OracleDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
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query := fmt.Sprintf(`SELECT trigger_name, trigger_type, triggering_event
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FROM all_triggers
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WHERE table_owner = '%s' AND table_name = '%s'`,
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strings.ToUpper(dbName), strings.ToUpper(tableName))
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data, _, err := o.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_NAME"]),
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Timing: fmt.Sprintf("%v", row["TRIGGER_TYPE"]),
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Event: fmt.Sprintf("%v", row["TRIGGERING_EVENT"]),
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Statement: "SOURCE HIDDEN", // Requires more complex query to get body
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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 (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
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// TODO: Implement batch application for Oracle using correct syntax
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return fmt.Errorf("read-only mode implemented for Oracle so far")
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}
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func (o *OracleDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
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query := fmt.Sprintf(`SELECT table_name, column_name, data_type
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FROM all_tab_columns
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WHERE owner = '%s'`, strings.ToUpper(dbName))
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data, _, err := o.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["DATA_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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