/
mysql.go
311 lines (281 loc) · 6.74 KB
/
mysql.go
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package database
import (
"context"
"database/sql"
"fmt"
"net"
"strconv"
"github.com/go-sql-driver/mysql"
"github.com/lighttiger2505/sqls/dialect"
"golang.org/x/crypto/ssh"
)
func init() {
RegisterOpen("mysql", mysqlOpen)
RegisterOpen("mysql8", mysqlOpen)
RegisterOpen("mysql57", mysqlOpen)
RegisterOpen("mysql56", mysqlOpen)
RegisterFactory("mysql", NewMySQLDBRepository)
RegisterFactory("mysql8", NewMySQLDBRepository)
RegisterFactory("mysql57", NewMySQLDBRepository)
RegisterFactory("mysql56", NewMySQLDBRepository)
}
func mysqlOpen(dbConnCfg *DBConfig) (*DBConnection, error) {
var (
conn *sql.DB
sshConn *ssh.Client
)
cfg, err := genMysqlConfig(dbConnCfg)
if err != nil {
return nil, err
}
if dbConnCfg.SSHCfg != nil {
dbConn, dbSSHConn, err := openMySQLViaSSH(cfg.FormatDSN(), dbConnCfg.SSHCfg)
if err != nil {
return nil, err
}
conn = dbConn
sshConn = dbSSHConn
} else {
dbConn, err := sql.Open("mysql", cfg.FormatDSN())
if err != nil {
return nil, err
}
conn = dbConn
}
if err := conn.Ping(); err != nil {
return nil, fmt.Errorf("cannot ping to database, %w", err)
}
conn.SetMaxIdleConns(DefaultMaxIdleConns)
conn.SetMaxOpenConns(DefaultMaxOpenConns)
return &DBConnection{
Conn: conn,
SSHConn: sshConn,
Driver: dbConnCfg.Driver,
}, nil
}
type MySQLViaSSHDialer struct {
client *ssh.Client
}
func (d *MySQLViaSSHDialer) Dial(ctx context.Context, addr string) (net.Conn, error) {
return d.client.Dial("tcp", addr)
}
func openMySQLViaSSH(dsn string, sshCfg *SSHConfig) (*sql.DB, *ssh.Client, error) {
sshConfig, err := sshCfg.ClientConfig()
if err != nil {
return nil, nil, err
}
sshConn, err := ssh.Dial("tcp", sshCfg.Endpoint(), sshConfig)
if err != nil {
return nil, nil, fmt.Errorf("cannot ssh dial, %w", err)
}
mysql.RegisterDialContext("mysql+tcp", (&MySQLViaSSHDialer{sshConn}).Dial)
conn, err := sql.Open("mysql", dsn)
if err != nil {
return nil, nil, fmt.Errorf("cannot connect database, %w", err)
}
return conn, sshConn, nil
}
func genMysqlConfig(connCfg *DBConfig) (*mysql.Config, error) {
cfg := mysql.NewConfig()
if connCfg.DataSourceName != "" {
return mysql.ParseDSN(connCfg.DataSourceName)
}
cfg.User = connCfg.User
cfg.Passwd = connCfg.Passwd
cfg.DBName = connCfg.DBName
switch connCfg.Proto {
case ProtoTCP, ProtoUDP:
host, port := connCfg.Host, connCfg.Port
if host == "" {
host = "127.0.0.1"
}
if port == 0 {
port = 3306
}
cfg.Addr = host + ":" + strconv.Itoa(port)
cfg.Net = string(connCfg.Proto)
case ProtoUnix:
if connCfg.Path != "" {
cfg.Addr = "/tmp/mysql.sock"
break
}
cfg.Addr = connCfg.Path
cfg.Net = string(connCfg.Proto)
default:
return nil, fmt.Errorf("default addr for network %s unknown", connCfg.Proto)
}
cfg.Params = connCfg.Params
return cfg, nil
}
type MySQLDBRepository struct {
Conn *sql.DB
driver dialect.DatabaseDriver
}
func NewMySQLDBRepository(conn *sql.DB) DBRepository {
return &MySQLDBRepository{Conn: conn}
}
func (db *MySQLDBRepository) Driver() dialect.DatabaseDriver {
return db.driver
}
func (db *MySQLDBRepository) CurrentDatabase(ctx context.Context) (string, error) {
row := db.Conn.QueryRowContext(ctx, "SELECT DATABASE()")
var database string
if err := row.Scan(&database); err != nil {
return "", err
}
return database, nil
}
func (db *MySQLDBRepository) Databases(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(ctx, "select SCHEMA_NAME from information_schema.SCHEMATA")
if err != nil {
return nil, err
}
defer rows.Close()
databases := []string{}
for rows.Next() {
var database string
if err := rows.Scan(&database); err != nil {
return nil, err
}
databases = append(databases, database)
}
return databases, nil
}
func (db *MySQLDBRepository) CurrentSchema(ctx context.Context) (string, error) {
return db.CurrentDatabase(ctx)
}
func (db *MySQLDBRepository) Schemas(ctx context.Context) ([]string, error) {
return db.Databases(ctx)
}
func (db *MySQLDBRepository) SchemaTables(ctx context.Context) (map[string][]string, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
TABLE_SCHEMA,
TABLE_NAME
FROM
information_schema.TABLES
ORDER BY
TABLE_SCHEMA,
TABLE_NAME
`)
if err != nil {
return nil, err
}
defer rows.Close()
databaseTables := map[string][]string{}
for rows.Next() {
var schema, table string
if err := rows.Scan(&schema, &table); err != nil {
return nil, err
}
if arr, ok := databaseTables[schema]; ok {
databaseTables[schema] = append(arr, table)
} else {
databaseTables[schema] = []string{table}
}
}
return databaseTables, nil
}
func (db *MySQLDBRepository) Tables(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(ctx, "SHOW TABLES")
if err != nil {
return nil, err
}
defer rows.Close()
tables := []string{}
for rows.Next() {
var table string
if err := rows.Scan(&table); err != nil {
return nil, err
}
tables = append(tables, table)
}
return tables, nil
}
func (db *MySQLDBRepository) DescribeDatabaseTable(ctx context.Context) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
TABLE_SCHEMA,
TABLE_NAME,
COLUMN_NAME,
COLUMN_TYPE,
IS_NULLABLE,
COLUMN_KEY,
COLUMN_DEFAULT,
EXTRA
FROM information_schema.COLUMNS
`)
if err != nil {
return nil, err
}
defer rows.Close()
tableInfos := []*ColumnDesc{}
for rows.Next() {
var tableInfo ColumnDesc
err := rows.Scan(
&tableInfo.Schema,
&tableInfo.Table,
&tableInfo.Name,
&tableInfo.Type,
&tableInfo.Null,
&tableInfo.Key,
&tableInfo.Default,
&tableInfo.Extra,
)
if err != nil {
return nil, err
}
tableInfos = append(tableInfos, &tableInfo)
}
return tableInfos, nil
}
func (db *MySQLDBRepository) DescribeDatabaseTableBySchema(ctx context.Context, schemaName string) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
TABLE_SCHEMA,
TABLE_NAME,
COLUMN_NAME,
COLUMN_TYPE,
IS_NULLABLE,
COLUMN_KEY,
COLUMN_DEFAULT,
EXTRA
FROM information_schema.COLUMNS
WHERE information_schema.COLUMNS.TABLE_SCHEMA = ?
`, schemaName)
if err != nil {
return nil, err
}
defer rows.Close()
tableInfos := []*ColumnDesc{}
for rows.Next() {
var tableInfo ColumnDesc
err := rows.Scan(
&tableInfo.Schema,
&tableInfo.Table,
&tableInfo.Name,
&tableInfo.Type,
&tableInfo.Null,
&tableInfo.Key,
&tableInfo.Default,
&tableInfo.Extra,
)
if err != nil {
return nil, err
}
tableInfos = append(tableInfos, &tableInfo)
}
return tableInfos, nil
}
func (db *MySQLDBRepository) Exec(ctx context.Context, query string) (sql.Result, error) {
return db.Conn.ExecContext(ctx, query)
}
func (db *MySQLDBRepository) Query(ctx context.Context, query string) (*sql.Rows, error) {
return db.Conn.QueryContext(ctx, query)
}