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|
package testfixtures
import (
"database/sql"
"fmt"
"strings"
)
// Oracle is the Oracle database helper for this package
type Oracle struct {
baseHelper
enabledConstraints []oracleConstraint
sequences []string
}
type oracleConstraint struct {
tableName string
constraintName string
}
func (h *Oracle) init(db *sql.DB) error {
var err error
h.enabledConstraints, err = h.getEnabledConstraints(db)
if err != nil {
return err
}
h.sequences, err = h.getSequences(db)
if err != nil {
return err
}
return nil
}
func (*Oracle) paramType() int {
return paramTypeColon
}
func (*Oracle) quoteKeyword(str string) string {
return fmt.Sprintf("\"%s\"", strings.ToUpper(str))
}
func (*Oracle) databaseName(db *sql.DB) (dbName string) {
db.QueryRow("SELECT user FROM DUAL").Scan(&dbName)
return
}
func (*Oracle) tableNames(db *sql.DB) ([]string, error) {
query := `
SELECT TABLE_NAME
FROM USER_TABLES
`
rows, err := db.Query(query)
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)
}
return tables, nil
}
func (*Oracle) getEnabledConstraints(db *sql.DB) ([]oracleConstraint, error) {
var constraints []oracleConstraint
rows, err := db.Query(`
SELECT table_name, constraint_name
FROM user_constraints
WHERE constraint_type = 'R'
AND status = 'ENABLED'
`)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var constraint oracleConstraint
rows.Scan(&constraint.tableName, &constraint.constraintName)
constraints = append(constraints, constraint)
}
return constraints, nil
}
func (*Oracle) getSequences(db *sql.DB) ([]string, error) {
var sequences []string
rows, err := db.Query("SELECT sequence_name FROM user_sequences")
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var sequence string
if err = rows.Scan(&sequence); err != nil {
return nil, err
}
sequences = append(sequences, sequence)
}
return sequences, nil
}
func (h *Oracle) resetSequences(db *sql.DB) error {
for _, sequence := range h.sequences {
_, err := db.Exec(fmt.Sprintf("DROP SEQUENCE %s", h.quoteKeyword(sequence)))
if err != nil {
return err
}
_, err = db.Exec(fmt.Sprintf("CREATE SEQUENCE %s START WITH %d", h.quoteKeyword(sequence), resetSequencesTo))
if err != nil {
return err
}
}
return nil
}
func (h *Oracle) disableReferentialIntegrity(db *sql.DB, loadFn loadFunction) error {
// re-enable after load
defer func() {
for _, c := range h.enabledConstraints {
db.Exec(fmt.Sprintf("ALTER TABLE %s ENABLE CONSTRAINT %s", h.quoteKeyword(c.tableName), h.quoteKeyword(c.constraintName)))
}
}()
// disable foreign keys
for _, c := range h.enabledConstraints {
_, err := db.Exec(fmt.Sprintf("ALTER TABLE %s DISABLE CONSTRAINT %s", h.quoteKeyword(c.tableName), h.quoteKeyword(c.constraintName)))
if err != nil {
return err
}
}
tx, err := db.Begin()
if err != nil {
return err
}
if err = loadFn(tx); err != nil {
tx.Rollback()
return err
}
if err = tx.Commit(); err != nil {
return err
}
return h.resetSequences(db)
}
|
