313 lines
7.1 KiB
Go
313 lines
7.1 KiB
Go
package dialects
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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. "github.com/go-xorm/core"
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)
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func init() {
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RegisterDialect("mssql", &mssql{})
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}
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type mssql struct {
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Base
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}
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func (db *mssql) Init(uri *Uri, drivername, dataSourceName string) error {
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return db.Base.Init(db, uri, drivername, dataSourceName)
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}
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func (db *mssql) SqlType(c *Column) string {
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var res string
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switch t := c.SQLType.Name; t {
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case Bool:
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res = TinyInt
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case Serial:
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c.IsAutoIncrement = true
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c.IsPrimaryKey = true
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c.Nullable = false
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res = Int
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case BigSerial:
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c.IsAutoIncrement = true
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c.IsPrimaryKey = true
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c.Nullable = false
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res = BigInt
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case Bytea, Blob, Binary, TinyBlob, MediumBlob, LongBlob:
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res = VarBinary
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if c.Length == 0 {
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c.Length = 50
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}
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case TimeStamp:
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res = DateTime
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case TimeStampz:
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res = "DATETIMEOFFSET"
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c.Length = 7
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case MediumInt:
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res = Int
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case MediumText, TinyText, LongText:
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res = Text
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case Double:
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res = Real
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default:
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res = t
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}
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if res == Int {
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return Int
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}
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var hasLen1 bool = (c.Length > 0)
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var hasLen2 bool = (c.Length2 > 0)
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if hasLen1 {
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res += "(" + strconv.Itoa(c.Length) + ")"
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} else if hasLen2 {
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res += "(" + strconv.Itoa(c.Length) + "," + strconv.Itoa(c.Length2) + ")"
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}
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return res
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}
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func (db *mssql) SupportInsertMany() bool {
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return true
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}
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func (db *mssql) QuoteStr() string {
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return "\""
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}
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func (db *mssql) SupportEngine() bool {
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return false
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}
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func (db *mssql) AutoIncrStr() string {
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return "IDENTITY"
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}
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func (db *mssql) DropTableSql(tableName string) string {
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return fmt.Sprintf("IF EXISTS (SELECT * FROM sysobjects WHERE id = "+
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"object_id(N'%s') and OBJECTPROPERTY(id, N'IsUserTable') = 1) "+
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"DROP TABLE \"%s\"", tableName, tableName)
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}
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func (db *mssql) SupportCharset() bool {
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return false
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}
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func (db *mssql) IndexOnTable() bool {
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return true
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}
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func (db *mssql) IndexCheckSql(tableName, idxName string) (string, []interface{}) {
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args := []interface{}{idxName}
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sql := "select name from sysindexes where id=object_id('" + tableName + "') and name=?"
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return sql, args
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}
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func (db *mssql) ColumnCheckSql(tableName, colName string) (string, []interface{}) {
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args := []interface{}{tableName, colName}
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sql := `SELECT "COLUMN_NAME" FROM "INFORMATION_SCHEMA"."COLUMNS" WHERE "TABLE_NAME" = ? AND "COLUMN_NAME" = ?`
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return sql, args
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}
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func (db *mssql) TableCheckSql(tableName string) (string, []interface{}) {
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args := []interface{}{}
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sql := "select * from sysobjects where id = object_id(N'" + tableName + "') and OBJECTPROPERTY(id, N'IsUserTable') = 1"
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return sql, args
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}
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func (db *mssql) GetColumns(tableName string) ([]string, map[string]*Column, error) {
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args := []interface{}{}
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s := `select a.name as name, b.name as ctype,a.max_length,a.precision,a.scale
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from sys.columns a left join sys.types b on a.user_type_id=b.user_type_id
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where a.object_id=object_id('` + tableName + `')`
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cnn, err := Open(db.DriverName(), db.DataSourceName())
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if err != nil {
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return nil, nil, err
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}
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defer cnn.Close()
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rows, err := cnn.Query(s, args...)
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if err != nil {
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return nil, nil, err
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}
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cols := make(map[string]*Column)
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colSeq := make([]string, 0)
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for rows.Next() {
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var name, ctype, precision, scale string
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var maxLen int
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err = rows.Scan(&name, &ctype, &maxLen, &precision, &scale)
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if err != nil {
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return nil, nil, err
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}
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col := new(Column)
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col.Indexes = make(map[string]bool)
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col.Length = maxLen
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col.Name = strings.Trim(name, "` ")
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ct := strings.ToUpper(ctype)
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switch ct {
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case "DATETIMEOFFSET":
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col.SQLType = SQLType{TimeStampz, 0, 0}
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case "NVARCHAR":
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col.SQLType = SQLType{Varchar, 0, 0}
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case "IMAGE":
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col.SQLType = SQLType{VarBinary, 0, 0}
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default:
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if _, ok := SqlTypes[ct]; ok {
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col.SQLType = SQLType{ct, 0, 0}
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} else {
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return nil, nil, errors.New(fmt.Sprintf("unknow colType %v for %v - %v",
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ct, tableName, col.Name))
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}
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}
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if col.SQLType.IsText() {
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if col.Default != "" {
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col.Default = "'" + col.Default + "'"
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} else {
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if col.DefaultIsEmpty {
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col.Default = "''"
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}
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}
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}
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cols[col.Name] = col
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colSeq = append(colSeq, col.Name)
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}
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return colSeq, cols, nil
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}
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func (db *mssql) GetTables() ([]*Table, error) {
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args := []interface{}{}
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s := `select name from sysobjects where xtype ='U'`
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cnn, err := Open(db.DriverName(), db.DataSourceName())
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if err != nil {
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return nil, err
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}
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defer cnn.Close()
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rows, err := cnn.Query(s, args...)
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if err != nil {
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return nil, err
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}
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tables := make([]*Table, 0)
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for rows.Next() {
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table := NewEmptyTable()
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var name string
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err = rows.Scan(&name)
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if err != nil {
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return nil, err
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}
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table.Name = strings.Trim(name, "` ")
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tables = append(tables, table)
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}
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return tables, nil
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}
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func (db *mssql) GetIndexes(tableName string) (map[string]*Index, error) {
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args := []interface{}{tableName}
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s := `SELECT
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IXS.NAME AS [INDEX_NAME],
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C.NAME AS [COLUMN_NAME],
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IXS.is_unique AS [IS_UNIQUE],
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CASE IXCS.IS_INCLUDED_COLUMN
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WHEN 0 THEN 'NONE'
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ELSE 'INCLUDED' END AS [IS_INCLUDED_COLUMN]
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FROM SYS.INDEXES IXS
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INNER JOIN SYS.INDEX_COLUMNS IXCS
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ON IXS.OBJECT_ID=IXCS.OBJECT_ID AND IXS.INDEX_ID = IXCS.INDEX_ID
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INNER JOIN SYS.COLUMNS C ON IXS.OBJECT_ID=C.OBJECT_ID
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AND IXCS.COLUMN_ID=C.COLUMN_ID
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WHERE IXS.TYPE_DESC='NONCLUSTERED' and OBJECT_NAME(IXS.OBJECT_ID) =?
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`
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cnn, err := Open(db.DriverName(), db.DataSourceName())
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if err != nil {
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return nil, err
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}
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defer cnn.Close()
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rows, err := cnn.Query(s, args...)
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if err != nil {
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return nil, err
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}
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indexes := make(map[string]*Index, 0)
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for rows.Next() {
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var indexType int
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var indexName, colName, isUnique string
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err = rows.Scan(&indexName, &colName, &isUnique, nil)
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if err != nil {
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return nil, err
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}
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i, err := strconv.ParseBool(isUnique)
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if err != nil {
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return nil, err
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}
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if i {
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indexType = UniqueType
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} else {
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indexType = IndexType
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}
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colName = strings.Trim(colName, "` ")
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if strings.HasPrefix(indexName, "IDX_"+tableName) || strings.HasPrefix(indexName, "UQE_"+tableName) {
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indexName = indexName[5+len(tableName) : len(indexName)]
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}
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var index *Index
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var ok bool
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if index, ok = indexes[indexName]; !ok {
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index = new(Index)
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index.Type = indexType
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index.Name = indexName
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indexes[indexName] = index
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}
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index.AddColumn(colName)
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}
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return indexes, nil
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}
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func (db *mssql) CreateTablSql(table *Table, tableName, storeEngine, charset string) string {
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var sql string
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if tableName == "" {
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tableName = table.Name
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}
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sql = "IF NOT EXISTS (SELECT [name] FROM sys.tables WHERE [name] = '" + tableName + "' ) CREATE TABLE"
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sql += db.QuoteStr() + tableName + db.QuoteStr() + " ("
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pkList := table.PrimaryKeys
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for _, colName := range table.ColumnsSeq() {
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col := table.GetColumn(colName)
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if col.IsPrimaryKey && len(pkList) == 1 {
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sql += col.String(db)
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} else {
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sql += col.StringNoPk(db)
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}
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sql = strings.TrimSpace(sql)
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sql += ", "
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}
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if len(pkList) > 1 {
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sql += "PRIMARY KEY ( "
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sql += strings.Join(pkList, ",")
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sql += " ), "
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}
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sql = sql[:len(sql)-2] + ")"
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sql += ";"
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return sql
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}
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func (db *mssql) Filters() []Filter {
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return []Filter{&IdFilter{}, &QuoteFilter{}}
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}
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