forgejo-federation/vendor/github.com/go-testfixtures/testfixtures/v3/sqlserver.go
techknowlogick 9e6a79bea9
upgrade to use testfixtures v3 (#11904)
* upgrade to use testfixtures v3

* simplify logic

* make vendor

* update per @lunny

* Update templates/repo/empty.tmpl

* Update templates/repo/empty.tmpl

Co-authored-by: Lauris BH <lauris@nix.lv>
2020-06-17 22:07:58 +03:00

153 lines
3.8 KiB
Go
Vendored

package testfixtures
import (
"database/sql"
"fmt"
"strings"
)
type sqlserver struct {
baseHelper
paramTypeCache int
tables []string
}
func (h *sqlserver) init(db *sql.DB) error {
var err error
// NOTE(@andreynering): The SQL Server lib (github.com/denisenkom/go-mssqldb)
// supports both the "?" style (when using the deprecated "mssql" driver)
// and the "@p1" style (when using the new "sqlserver" driver).
//
// Since we don't have a way to know which driver it's been used,
// this is a small hack to detect the allowed param style.
var v int
if err := db.QueryRow("SELECT ?", 1).Scan(&v); err == nil && v == 1 {
h.paramTypeCache = paramTypeQuestion
} else {
h.paramTypeCache = paramTypeAtSign
}
h.tables, err = h.tableNames(db)
if err != nil {
return err
}
return nil
}
func (h *sqlserver) paramType() int {
return h.paramTypeCache
}
func (*sqlserver) quoteKeyword(s string) string {
parts := strings.Split(s, ".")
for i, p := range parts {
parts[i] = fmt.Sprintf(`[%s]`, p)
}
return strings.Join(parts, ".")
}
func (*sqlserver) databaseName(q queryable) (string, error) {
var dbName string
err := q.QueryRow("SELECT DB_NAME()").Scan(&dbName)
return dbName, err
}
func (*sqlserver) tableNames(q queryable) ([]string, error) {
rows, err := q.Query("SELECT table_schema + '.' + table_name FROM information_schema.tables WHERE table_name <> 'spt_values'")
if err != nil {
return nil, err
}
defer rows.Close()
var tables []string
for rows.Next() {
var table string
if err = rows.Scan(&table); err != nil {
return nil, err
}
tables = append(tables, table)
}
if err = rows.Err(); err != nil {
return nil, err
}
return tables, nil
}
func (h *sqlserver) tableHasIdentityColumn(q queryable, tableName string) (bool, error) {
sql := fmt.Sprintf(`
SELECT COUNT(*)
FROM SYS.IDENTITY_COLUMNS
WHERE OBJECT_ID = OBJECT_ID('%s')
`, tableName)
var count int
if err := q.QueryRow(sql).Scan(&count); err != nil {
return false, err
}
return count > 0, nil
}
func (h *sqlserver) whileInsertOnTable(tx *sql.Tx, tableName string, fn func() error) (err error) {
hasIdentityColumn, err := h.tableHasIdentityColumn(tx, tableName)
if err != nil {
return err
}
if hasIdentityColumn {
defer func() {
_, err2 := tx.Exec(fmt.Sprintf("SET IDENTITY_INSERT %s OFF", h.quoteKeyword(tableName)))
if err2 != nil && err == nil {
err = fmt.Errorf("testfixtures: could not disable identity insert: %w", err2)
}
}()
_, err := tx.Exec(fmt.Sprintf("SET IDENTITY_INSERT %s ON", h.quoteKeyword(tableName)))
if err != nil {
return fmt.Errorf("testfixtures: could not enable identity insert: %w", err)
}
}
return fn()
}
func (h *sqlserver) disableReferentialIntegrity(db *sql.DB, loadFn loadFunction) (err error) {
// ensure the triggers are re-enable after all
defer func() {
var sql string
for _, table := range h.tables {
sql += fmt.Sprintf("ALTER TABLE %s WITH CHECK CHECK CONSTRAINT ALL;", h.quoteKeyword(table))
}
if _, err2 := db.Exec(sql); err2 != nil && err == nil {
err = err2
}
}()
var sql string
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
}
defer tx.Rollback()
if err = loadFn(tx); err != nil {
return err
}
return tx.Commit()
}
// splitter is a batchSplitter interface implementation. We need it for
// SQL Server because commands like a `CREATE SCHEMA...` and a `CREATE TABLE...`
// could not be executed in the same batch.
// See https://docs.microsoft.com/en-us/previous-versions/sql/sql-server-2008-r2/ms175502(v=sql.105)#rules-for-using-batches
func (*sqlserver) splitter() []byte {
return []byte("GO\n")
}