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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
439 lines
11 KiB
Go
439 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/ssh"
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"GoNavi-Wails/internal/utils"
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_ "gitea.com/kingbase/gokb" // Registers "kingbase" driver
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)
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type KingbaseDB struct {
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conn *sql.DB
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pingTimeout time.Duration
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}
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func quoteConnValue(v string) string {
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if v == "" {
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return "''"
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}
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needsQuote := false
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for _, r := range v {
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switch r {
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case ' ', '\t', '\n', '\r', '\v', '\f', '\'', '\\':
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needsQuote = true
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}
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if needsQuote {
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break
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}
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}
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if !needsQuote {
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return v
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}
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var b strings.Builder
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b.Grow(len(v) + 2)
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b.WriteByte('\'')
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for _, r := range v {
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if r == '\\' || r == '\'' {
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b.WriteByte('\\')
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}
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b.WriteRune(r)
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}
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b.WriteByte('\'')
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return b.String()
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}
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func (k *KingbaseDB) getDSN(config connection.ConnectionConfig) string {
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// Kingbase DSN usually similar to Postgres:
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// host=localhost port=54321 user=system password=... dbname=TEST sslmode=disable
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address := config.Host
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port := 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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// Kingbase/Postgres lib/pq allows custom dialer via "host" if using unix socket,
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// but for custom network it's harder.
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// Ideally we use a local forwarder.
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// For now, we assume standard TCP or handle SSH externally.
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// If we implement the net.Dial override for "kingbase" driver (which might use lib/pq internally),
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// we might need to check if it supports "cloudsql" style or similar custom dialers.
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// Similar to others, skipping SSH deep integration here for now.
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_ = netName
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}
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}
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// Construct DSN
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dsn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable connect_timeout=%d",
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quoteConnValue(address),
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port,
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quoteConnValue(config.User),
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quoteConnValue(config.Password),
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quoteConnValue(config.Database),
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getConnectTimeoutSeconds(config),
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)
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return dsn
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}
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func (k *KingbaseDB) Connect(config connection.ConnectionConfig) error {
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dsn := k.getDSN(config)
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// Open using "kingbase" driver
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db, err := sql.Open("kingbase", 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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k.conn = db
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k.pingTimeout = getConnectTimeout(config)
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if err := k.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 (k *KingbaseDB) Close() error {
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if k.conn != nil {
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return k.conn.Close()
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}
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return nil
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}
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func (k *KingbaseDB) Ping() error {
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if k.conn == nil {
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return fmt.Errorf("connection not open")
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}
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timeout := k.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 k.conn.PingContext(ctx)
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}
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func (k *KingbaseDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
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if k.conn == nil {
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return nil, nil, fmt.Errorf("connection not open")
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}
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rows, err := k.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 (k *KingbaseDB) Query(query string) ([]map[string]interface{}, []string, error) {
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if k.conn == nil {
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return nil, nil, fmt.Errorf("connection not open")
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}
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rows, err := k.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 (k *KingbaseDB) ExecContext(ctx context.Context, query string) (int64, error) {
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if k.conn == nil {
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return 0, fmt.Errorf("connection not open")
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}
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res, err := k.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 (k *KingbaseDB) Exec(query string) (int64, error) {
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if k.conn == nil {
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return 0, fmt.Errorf("connection not open")
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}
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res, err := k.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 (k *KingbaseDB) GetDatabases() ([]string, error) {
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// Postgres/Kingbase style
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data, _, err := k.Query("SELECT datname FROM pg_database WHERE datistemplate = false")
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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["datname"]; 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 (k *KingbaseDB) GetTables(dbName string) ([]string, error) {
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// Kingbase: tables are scoped by the current DB connection; include schema to avoid search_path issues.
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query := `
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SELECT table_schema AS schemaname, table_name AS tablename
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FROM information_schema.tables
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WHERE table_type = 'BASE TABLE'
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AND table_schema NOT IN ('pg_catalog', 'information_schema')
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AND table_schema NOT LIKE 'pg_%'
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ORDER BY table_schema, table_name`
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data, _, err := k.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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schema, okSchema := row["schemaname"]
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name, okName := row["tablename"]
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if okSchema && okName {
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tables = append(tables, fmt.Sprintf("%v.%v", schema, name))
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continue
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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 (k *KingbaseDB) GetCreateStatement(dbName, tableName string) (string, error) {
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// Kingbase doesn't have "SHOW CREATE TABLE".
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// We can try pg_dump logic or use a query to reconstruction.
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// A simple approach is just returning basic info or "Not Supported".
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// Or we can query information_schema to build it.
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return "SHOW CREATE TABLE not directly supported in Kingbase/Postgres via SQL", nil
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}
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func (k *KingbaseDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
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schema := "public"
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if dbName != "" {
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schema = dbName
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}
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query := fmt.Sprintf(`SELECT column_name, data_type, is_nullable, column_default
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FROM information_schema.columns
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WHERE table_schema = '%s' AND table_name = '%s'
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ORDER BY ordinal_position`, schema, tableName)
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data, _, err := k.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["is_nullable"]),
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}
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if row["column_default"] != nil {
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def := fmt.Sprintf("%v", row["column_default"])
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col.Default = &def
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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 (k *KingbaseDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
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// Postgres/Kingbase index query
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query := fmt.Sprintf(`
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SELECT
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i.relname as index_name,
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a.attname as column_name,
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ix.indisunique as is_unique
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FROM
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pg_class t,
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pg_class i,
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pg_index ix,
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pg_attribute a,
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pg_namespace n
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WHERE
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t.oid = ix.indrelid
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AND i.oid = ix.indexrelid
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AND a.attrelid = t.oid
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AND a.attnum = ANY(ix.indkey)
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AND t.relkind = 'r'
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AND t.relname = '%s'
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AND n.oid = t.relnamespace
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AND n.nspname = '%s'
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`, tableName, "public") // Default to public if dbName (schema) not clear.
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if dbName != "" {
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// Update query to use dbName as schema
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query = strings.Replace(query, "'public'", fmt.Sprintf("'%s'", dbName), 1)
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}
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data, _, err := k.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 := 1
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if val, ok := row["is_unique"]; ok {
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if b, ok := val.(bool); ok && b {
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nonUnique = 0
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}
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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: nonUnique,
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IndexType: "BTREE", // Default
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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 (k *KingbaseDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
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schema := "public"
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if dbName != "" {
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schema = dbName
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}
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query := fmt.Sprintf(`
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SELECT
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tc.constraint_name,
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kcu.column_name,
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ccu.table_name AS foreign_table_name,
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ccu.column_name AS foreign_column_name
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FROM
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information_schema.table_constraints AS tc
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JOIN information_schema.key_column_usage AS kcu
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ON tc.constraint_name = kcu.constraint_name
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AND tc.table_schema = kcu.table_schema
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JOIN information_schema.constraint_column_usage AS ccu
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ON ccu.constraint_name = tc.constraint_name
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AND ccu.table_schema = tc.table_schema
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WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.table_name='%s' AND tc.table_schema='%s'`,
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tableName, schema)
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data, _, err := k.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["foreign_table_name"]),
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RefColumnName: fmt.Sprintf("%v", row["foreign_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 (k *KingbaseDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
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query := fmt.Sprintf(`SELECT trigger_name, action_timing, event_manipulation
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FROM information_schema.triggers
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WHERE event_object_table = '%s'`, tableName)
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data, _, err := k.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["action_timing"]),
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Event: fmt.Sprintf("%v", row["event_manipulation"]),
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Statement: "SOURCE HIDDEN",
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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 (k *KingbaseDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
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return fmt.Errorf("read-only mode implemented for Kingbase so far")
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}
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func (k *KingbaseDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
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// dbName 在本项目语义里是“数据库”，schema 由 table_schema 决定；这里返回全部用户 schema 的列用于查询提示。
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query := `
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SELECT table_schema, table_name, column_name, data_type
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FROM information_schema.columns
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WHERE table_schema NOT IN ('pg_catalog', 'information_schema')
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AND table_schema NOT LIKE 'pg_%'
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ORDER BY table_schema, table_name, ordinal_position`
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data, _, err := k.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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schema := fmt.Sprintf("%v", row["table_schema"])
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table := fmt.Sprintf("%v", row["table_name"])
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tableName := table
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if strings.TrimSpace(schema) != "" {
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tableName = fmt.Sprintf("%s.%s", schema, table)
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}
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col := connection.ColumnDefinitionWithTable{
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TableName: tableName,
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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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