gitroast/vendor/gopkg.in/testfixtures.v2/sqlserver.go

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2016-12-29 01:03:40 +00:00
package testfixtures
import (
"database/sql"
"fmt"
)
// SQLServer is the helper for SQL Server for this package.
// SQL Server >= 2008 is required.
type SQLServer struct {
baseHelper
tables []string
}
func (h *SQLServer) init(db *sql.DB) error {
var err error
h.tables, err = h.getTables(db)
if err != nil {
return err
}
return nil
}
func (*SQLServer) paramType() int {
return paramTypeQuestion
}
func (*SQLServer) quoteKeyword(str string) string {
return fmt.Sprintf("[%s]", str)
}
func (*SQLServer) databaseName(db *sql.DB) (dbname string) {
db.QueryRow("SELECT DB_NAME()").Scan(&dbname)
return
}
func (*SQLServer) getTables(db *sql.DB) ([]string, error) {
rows, err := db.Query("SELECT table_name FROM information_schema.tables")
if err != nil {
return nil, err
}
tables := make([]string, 0)
defer rows.Close()
for rows.Next() {
var table string
rows.Scan(&table)
tables = append(tables, table)
}
return tables, nil
}
func (*SQLServer) tableHasIdentityColumn(tx *sql.Tx, tableName string) bool {
sql := `
SELECT COUNT(*)
FROM SYS.IDENTITY_COLUMNS
WHERE OBJECT_NAME(OBJECT_ID) = ?
`
var count int
tx.QueryRow(sql, tableName).Scan(&count)
return count > 0
}
func (h *SQLServer) whileInsertOnTable(tx *sql.Tx, tableName string, fn func() error) error {
if h.tableHasIdentityColumn(tx, tableName) {
defer tx.Exec(fmt.Sprintf("SET IDENTITY_INSERT %s OFF", h.quoteKeyword(tableName)))
_, err := tx.Exec(fmt.Sprintf("SET IDENTITY_INSERT %s ON", h.quoteKeyword(tableName)))
if err != nil {
return err
}
}
return fn()
}
func (h *SQLServer) disableReferentialIntegrity(db *sql.DB, loadFn loadFunction) error {
// ensure the triggers are re-enable after all
defer func() {
sql := ""
for _, table := range h.tables {
sql += fmt.Sprintf("ALTER TABLE %s WITH CHECK CHECK CONSTRAINT ALL;", h.quoteKeyword(table))
}
if _, err := db.Exec(sql); err != nil {
fmt.Printf("Error on re-enabling constraints: %v\n", err)
}
}()
sql := ""
for _, table := range h.tables {
sql += fmt.Sprintf("ALTER TABLE %s NOCHECK CONSTRAINT ALL;", h.quoteKeyword(table))
}
if _, err := db.Exec(sql); err != nil {
return err
}
tx, err := db.Begin()
if err != nil {
return err
}
if err = loadFn(tx); err != nil {
tx.Rollback()
return err
}
return tx.Commit()
}