mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-05 09:49:37 +08:00
290 lines
6.5 KiB
Go
290 lines
6.5 KiB
Go
package testfixtures
|
|
|
|
import (
|
|
"database/sql"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// PostgreSQL is the PG helper for this package
|
|
type PostgreSQL struct {
|
|
baseHelper
|
|
|
|
// UseAlterConstraint If true, the contraint disabling will do
|
|
// using ALTER CONTRAINT sintax, only allowed in PG >= 9.4.
|
|
// If false, the constraint disabling will use DISABLE TRIGGER ALL,
|
|
// which requires SUPERUSER privileges.
|
|
UseAlterConstraint bool
|
|
|
|
tables []string
|
|
sequences []string
|
|
nonDeferrableConstraints []pgConstraint
|
|
tablesChecksum map[string]string
|
|
}
|
|
|
|
type pgConstraint struct {
|
|
tableName string
|
|
constraintName string
|
|
}
|
|
|
|
func (h *PostgreSQL) init(db *sql.DB) error {
|
|
var err error
|
|
|
|
h.tables, err = h.tableNames(db)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
h.sequences, err = h.getSequences(db)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
h.nonDeferrableConstraints, err = h.getNonDeferrableConstraints(db)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (*PostgreSQL) paramType() int {
|
|
return paramTypeDollar
|
|
}
|
|
|
|
func (*PostgreSQL) databaseName(q queryable) (string, error) {
|
|
var dbName string
|
|
err := q.QueryRow("SELECT current_database()").Scan(&dbName)
|
|
return dbName, err
|
|
}
|
|
|
|
func (h *PostgreSQL) tableNames(q queryable) ([]string, error) {
|
|
var tables []string
|
|
|
|
sql := `
|
|
SELECT pg_namespace.nspname || '.' || pg_class.relname
|
|
FROM pg_class
|
|
INNER JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
|
|
WHERE pg_class.relkind = 'r'
|
|
AND pg_namespace.nspname NOT IN ('pg_catalog', 'information_schema')
|
|
AND pg_namespace.nspname NOT LIKE 'pg_toast%';
|
|
`
|
|
rows, err := q.Query(sql)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer rows.Close()
|
|
|
|
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 *PostgreSQL) getSequences(q queryable) ([]string, error) {
|
|
const sql = `
|
|
SELECT pg_namespace.nspname || '.' || pg_class.relname AS sequence_name
|
|
FROM pg_class
|
|
INNER JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
|
|
WHERE pg_class.relkind = 'S'
|
|
`
|
|
|
|
rows, err := q.Query(sql)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer rows.Close()
|
|
|
|
var sequences []string
|
|
for rows.Next() {
|
|
var sequence string
|
|
if err = rows.Scan(&sequence); err != nil {
|
|
return nil, err
|
|
}
|
|
sequences = append(sequences, sequence)
|
|
}
|
|
if err = rows.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
return sequences, nil
|
|
}
|
|
|
|
func (*PostgreSQL) getNonDeferrableConstraints(q queryable) ([]pgConstraint, error) {
|
|
var constraints []pgConstraint
|
|
|
|
sql := `
|
|
SELECT table_schema || '.' || table_name, constraint_name
|
|
FROM information_schema.table_constraints
|
|
WHERE constraint_type = 'FOREIGN KEY'
|
|
AND is_deferrable = 'NO'
|
|
`
|
|
rows, err := q.Query(sql)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer rows.Close()
|
|
for rows.Next() {
|
|
var constraint pgConstraint
|
|
if err = rows.Scan(&constraint.tableName, &constraint.constraintName); err != nil {
|
|
return nil, err
|
|
}
|
|
constraints = append(constraints, constraint)
|
|
}
|
|
if err = rows.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
return constraints, nil
|
|
}
|
|
|
|
func (h *PostgreSQL) disableTriggers(db *sql.DB, loadFn loadFunction) (err error) {
|
|
defer func() {
|
|
// re-enable triggers after load
|
|
var sql string
|
|
for _, table := range h.tables {
|
|
sql += fmt.Sprintf("ALTER TABLE %s ENABLE TRIGGER ALL;", h.quoteKeyword(table))
|
|
}
|
|
if _, err2 := db.Exec(sql); err2 != nil && err == nil {
|
|
err = err2
|
|
}
|
|
}()
|
|
|
|
tx, err := db.Begin()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var sql string
|
|
for _, table := range h.tables {
|
|
sql += fmt.Sprintf("ALTER TABLE %s DISABLE TRIGGER ALL;", h.quoteKeyword(table))
|
|
}
|
|
if _, err = tx.Exec(sql); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = loadFn(tx); err != nil {
|
|
tx.Rollback()
|
|
return err
|
|
}
|
|
|
|
return tx.Commit()
|
|
}
|
|
|
|
func (h *PostgreSQL) makeConstraintsDeferrable(db *sql.DB, loadFn loadFunction) (err error) {
|
|
defer func() {
|
|
// ensure constraint being not deferrable again after load
|
|
var sql string
|
|
for _, constraint := range h.nonDeferrableConstraints {
|
|
sql += fmt.Sprintf("ALTER TABLE %s ALTER CONSTRAINT %s NOT DEFERRABLE;", h.quoteKeyword(constraint.tableName), h.quoteKeyword(constraint.constraintName))
|
|
}
|
|
if _, err2 := db.Exec(sql); err2 != nil && err == nil {
|
|
err = err2
|
|
}
|
|
}()
|
|
|
|
var sql string
|
|
for _, constraint := range h.nonDeferrableConstraints {
|
|
sql += fmt.Sprintf("ALTER TABLE %s ALTER CONSTRAINT %s DEFERRABLE;", h.quoteKeyword(constraint.tableName), h.quoteKeyword(constraint.constraintName))
|
|
}
|
|
if _, err := db.Exec(sql); err != nil {
|
|
return err
|
|
}
|
|
|
|
tx, err := db.Begin()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer tx.Rollback()
|
|
|
|
if _, err = tx.Exec("SET CONSTRAINTS ALL DEFERRED"); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = loadFn(tx); err != nil {
|
|
return err
|
|
}
|
|
|
|
return tx.Commit()
|
|
}
|
|
|
|
func (h *PostgreSQL) disableReferentialIntegrity(db *sql.DB, loadFn loadFunction) (err error) {
|
|
// ensure sequences being reset after load
|
|
defer func() {
|
|
if err2 := h.resetSequences(db); err2 != nil && err == nil {
|
|
err = err2
|
|
}
|
|
}()
|
|
|
|
if h.UseAlterConstraint {
|
|
return h.makeConstraintsDeferrable(db, loadFn)
|
|
}
|
|
return h.disableTriggers(db, loadFn)
|
|
}
|
|
|
|
func (h *PostgreSQL) resetSequences(db *sql.DB) error {
|
|
for _, sequence := range h.sequences {
|
|
_, err := db.Exec(fmt.Sprintf("SELECT SETVAL('%s', %d)", sequence, resetSequencesTo))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (h *PostgreSQL) isTableModified(q queryable, tableName string) (bool, error) {
|
|
checksum, err := h.getChecksum(q, tableName)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
oldChecksum := h.tablesChecksum[tableName]
|
|
|
|
return oldChecksum == "" || checksum != oldChecksum, nil
|
|
}
|
|
|
|
func (h *PostgreSQL) afterLoad(q queryable) error {
|
|
if h.tablesChecksum != nil {
|
|
return nil
|
|
}
|
|
|
|
h.tablesChecksum = make(map[string]string, len(h.tables))
|
|
for _, t := range h.tables {
|
|
checksum, err := h.getChecksum(q, t)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
h.tablesChecksum[t] = checksum
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (h *PostgreSQL) getChecksum(q queryable, tableName string) (string, error) {
|
|
sqlStr := fmt.Sprintf(`
|
|
SELECT md5(CAST((array_agg(t.*)) AS TEXT))
|
|
FROM %s AS t
|
|
`,
|
|
h.quoteKeyword(tableName),
|
|
)
|
|
|
|
var checksum sql.NullString
|
|
if err := q.QueryRow(sqlStr).Scan(&checksum); err != nil {
|
|
return "", err
|
|
}
|
|
return checksum.String, nil
|
|
}
|
|
|
|
func (*PostgreSQL) quoteKeyword(s string) string {
|
|
parts := strings.Split(s, ".")
|
|
for i, p := range parts {
|
|
parts[i] = fmt.Sprintf(`"%s"`, p)
|
|
}
|
|
return strings.Join(parts, ".")
|
|
}
|