forked from sqls-server/sqls
/
mssql.go
373 lines (346 loc) · 8.1 KB
/
mssql.go
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package database
import (
"context"
"database/sql"
"fmt"
"log"
"net/url"
"strconv"
_ "github.com/denisenkom/go-mssqldb"
"github.com/hsanson/sqls/dialect"
"golang.org/x/crypto/ssh"
)
func init() {
RegisterOpen("mssql", mssqlOpen)
RegisterFactory("mssql", NewMssqlDBRepository)
}
func mssqlOpen(dbConnCfg *DBConfig) (*DBConnection, error) {
var (
conn *sql.DB
sshConn *ssh.Client
)
dsn, err := genMssqlConfig(dbConnCfg)
if err != nil {
return nil, err
}
if dbConnCfg.SSHCfg != nil {
return nil, fmt.Errorf("connect via SSH is not supported")
}
dbConn, err := sql.Open("sqlserver", dsn)
if err != nil {
return nil, err
}
conn = dbConn
if err = conn.Ping(); err != nil {
return nil, err
}
conn.SetMaxIdleConns(DefaultMaxIdleConns)
conn.SetMaxOpenConns(DefaultMaxOpenConns)
return &DBConnection{
Conn: conn,
SSHConn: sshConn,
}, nil
}
type MssqlDBRepository struct {
Conn *sql.DB
}
func NewMssqlDBRepository(conn *sql.DB) DBRepository {
return &MssqlDBRepository{Conn: conn}
}
func (db *MssqlDBRepository) Driver() dialect.DatabaseDriver {
return dialect.DatabaseDriverMssql
}
func (db *MssqlDBRepository) CurrentDatabase(ctx context.Context) (string, error) {
row := db.Conn.QueryRowContext(ctx, "SELECT DB_NAME()")
var database string
if err := row.Scan(&database); err != nil {
return "", err
}
return database, nil
}
func (db *MssqlDBRepository) Databases(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT name FROM sys.databases
`)
if err != nil {
log.Fatal(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 *MssqlDBRepository) CurrentSchema(ctx context.Context) (string, error) {
row := db.Conn.QueryRowContext(ctx, "SELECT SCHEMA_NAME()")
var database sql.NullString
if err := row.Scan(&database); err != nil {
return "", err
}
if database.Valid {
return database.String, nil
}
return "", nil
}
func (db *MssqlDBRepository) Schemas(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA
`)
if err != nil {
log.Fatal(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 *MssqlDBRepository) 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 *MssqlDBRepository) Tables(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
TABLE_NAME
FROM
INFORMATION_SCHEMA.TABLES
WHERE
TABLE_TYPE = 'BASE TABLE'
AND TABLE_SCHEMA NOT IN ('INFORMATION_SCHEMA', 'information_schema')
ORDER BY
TABLE_NAME
`)
if err != nil {
log.Fatal(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 *MssqlDBRepository) DescribeDatabaseTable(ctx context.Context) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
c.TABLE_SCHEMA,
c.TABLE_NAME,
c.COLUMN_NAME,
c.DATA_TYPE,
c.IS_NULLABLE,
CASE tc.CONSTRAINT_TYPE
WHEN 'PRIMARY KEY' THEN 'YES'
ELSE 'NO'
END,
c.COLUMN_DEFAULT,
''
FROM
INFORMATION_SCHEMA.COLUMNS c
LEFT JOIN
INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu
ON c.TABLE_NAME = ccu.TABLE_NAME
AND c.COLUMN_NAME = ccu.COLUMN_NAME
LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc ON
tc.TABLE_CATALOG = c.TABLE_CATALOG
AND tc.TABLE_SCHEMA = c.TABLE_SCHEMA
AND tc.TABLE_NAME = c.TABLE_NAME
AND tc.CONSTRAINT_NAME = ccu.CONSTRAINT_NAME
ORDER BY
c.TABLE_NAME,
c.ORDINAL_POSITION
`)
if err != nil {
log.Fatal(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 *MssqlDBRepository) DescribeDatabaseTableBySchema(ctx context.Context, schemaName string) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
c.TABLE_SCHEMA,
c.TABLE_NAME,
c.COLUMN_NAME,
c.DATA_TYPE,
c.IS_NULLABLE,
CASE tc.CONSTRAINT_TYPE
WHEN 'PRIMARY KEY' THEN 'YES'
ELSE 'NO'
END,
c.COLUMN_DEFAULT,
''
FROM
INFORMATION_SCHEMA.COLUMNS c
LEFT JOIN
INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu
ON c.TABLE_NAME = ccu.TABLE_NAME
AND c.COLUMN_NAME = ccu.COLUMN_NAME
LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc ON
tc.TABLE_CATALOG = c.TABLE_CATALOG
AND tc.TABLE_SCHEMA = c.TABLE_SCHEMA
AND tc.TABLE_NAME = c.TABLE_NAME
AND tc.CONSTRAINT_NAME = ccu.CONSTRAINT_NAME
WHERE
c.TABLE_SCHEMA = @p1
ORDER BY
c.TABLE_NAME,
c.ORDINAL_POSITION
`, schemaName)
if err != nil {
log.Fatal(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 *MssqlDBRepository) DescribeForeignKeysBySchema(ctx context.Context, schemaName string) ([]*ForeignKey, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT fk.name,
src_tbl.name,
src_col.name,
dst_tbl.name,
dst_col.name
FROM sys.foreign_key_columns fkc
JOIN sys.objects fk on fk.object_id = fkc.constraint_object_id
JOIN sys.tables src_tbl
ON src_tbl.object_id = fkc.parent_object_id
JOIN sys.schemas sch
ON src_tbl.schema_id = sch.schema_id
JOIN sys.columns src_col
ON src_col.column_id = parent_column_id AND src_col.object_id = src_tbl.object_id
JOIN sys.tables dst_tbl
ON dst_tbl.object_id = fkc.referenced_object_id
JOIN sys.columns dst_col
ON dst_col.column_id = referenced_column_id AND dst_col.object_id = dst_tbl.object_id
where sch.name = @p1
order by fk.name, fkc.constraint_object_id
`, schemaName)
if err != nil {
log.Fatal(err)
}
defer func() { _ = rows.Close() }()
return parseForeignKeys(rows, schemaName)
}
func (db *MssqlDBRepository) Exec(ctx context.Context, query string) (sql.Result, error) {
return db.Conn.ExecContext(ctx, query)
}
func (db *MssqlDBRepository) Query(ctx context.Context, query string) (*sql.Rows, error) {
return db.Conn.QueryContext(ctx, query)
}
func genMssqlConfig(connCfg *DBConfig) (string, error) {
if connCfg.DataSourceName != "" {
return connCfg.DataSourceName, nil
}
q := url.Values{}
q.Set("user", connCfg.User)
q.Set("password", connCfg.Passwd)
q.Set("database", connCfg.DBName)
switch connCfg.Proto {
case ProtoTCP:
host, port := connCfg.Host, connCfg.Port
if host == "" {
host = "127.0.0.1"
}
if port == 0 {
port = 1433
}
q.Set("server", host)
q.Set("port", strconv.Itoa(port))
case ProtoUDP, ProtoUnix:
default:
return "", fmt.Errorf("default addr for network %s unknown", connCfg.Proto)
}
for k, v := range connCfg.Params {
q.Set(k, v)
}
return genOptions(q, "", "=", ";", ",", true), nil
}