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136 lines
3.0 KiB
136 lines
3.0 KiB
package testfixtures
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import (
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"database/sql"
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"fmt"
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"strings"
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)
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// SQLServer is the helper for SQL Server for this package.
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// SQL Server >= 2008 is required.
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type SQLServer struct {
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baseHelper
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tables []string
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}
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func (h *SQLServer) init(db *sql.DB) error {
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var err error
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h.tables, err = h.tableNames(db)
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if err != nil {
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return err
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}
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return nil
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}
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func (*SQLServer) paramType() int {
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return paramTypeQuestion
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}
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func (*SQLServer) quoteKeyword(s string) string {
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parts := strings.Split(s, ".")
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for i, p := range parts {
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parts[i] = fmt.Sprintf(`[%s]`, p)
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}
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return strings.Join(parts, ".")
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}
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func (*SQLServer) databaseName(q queryable) (string, error) {
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var dbName string
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err := q.QueryRow("SELECT DB_NAME()").Scan(&dbName)
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return dbName, err
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}
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func (*SQLServer) tableNames(q queryable) ([]string, error) {
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rows, err := q.Query("SELECT table_schema + '.' + table_name FROM information_schema.tables")
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var tables []string
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for rows.Next() {
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var table string
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if err = rows.Scan(&table); err != nil {
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return nil, err
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}
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tables = append(tables, table)
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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return tables, nil
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}
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func (h *SQLServer) tableHasIdentityColumn(q queryable, tableName string) bool {
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sql := `
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SELECT COUNT(*)
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FROM SYS.IDENTITY_COLUMNS
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WHERE OBJECT_ID = OBJECT_ID(?)
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`
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var count int
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q.QueryRow(sql, h.quoteKeyword(tableName)).Scan(&count)
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return count > 0
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}
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func (h *SQLServer) whileInsertOnTable(tx *sql.Tx, tableName string, fn func() error) (err error) {
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if h.tableHasIdentityColumn(tx, tableName) {
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defer func() {
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_, err2 := tx.Exec(fmt.Sprintf("SET IDENTITY_INSERT %s OFF", h.quoteKeyword(tableName)))
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if err2 != nil && err == nil {
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err = err2
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}
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}()
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_, err := tx.Exec(fmt.Sprintf("SET IDENTITY_INSERT %s ON", h.quoteKeyword(tableName)))
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if err != nil {
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return err
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}
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}
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return fn()
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}
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func (h *SQLServer) disableReferentialIntegrity(db *sql.DB, loadFn loadFunction) (err error) {
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// ensure the triggers are re-enable after all
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defer func() {
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var sql string
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for _, table := range h.tables {
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sql += fmt.Sprintf("ALTER TABLE %s WITH CHECK CHECK CONSTRAINT ALL;", h.quoteKeyword(table))
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}
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if _, err2 := db.Exec(sql); err2 != nil && err == nil {
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err = err2
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}
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}()
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var sql string
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for _, table := range h.tables {
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sql += fmt.Sprintf("ALTER TABLE %s NOCHECK CONSTRAINT ALL;", h.quoteKeyword(table))
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}
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if _, err := db.Exec(sql); err != nil {
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return err
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}
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tx, err := db.Begin()
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if err != nil {
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return err
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}
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defer tx.Rollback()
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if err = loadFn(tx); err != nil {
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return err
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}
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return tx.Commit()
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}
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// splitter is a batchSplitter interface implementation. We need it for
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// SQL Server because commands like a `CREATE SCHEMA...` and a `CREATE TABLE...`
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// could not be executed in the same batch.
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// See https://docs.microsoft.com/en-us/previous-versions/sql/sql-server-2008-r2/ms175502(v=sql.105)#rules-for-using-batches
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func (*SQLServer) splitter() []byte {
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return []byte("GO\n")
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}
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