mirror of
https://github.com/go-gitea/gitea.git
synced 2025-11-04 05:25:15 +01:00
285 lines
7.8 KiB
Go
Vendored
285 lines
7.8 KiB
Go
Vendored
// Copyright 2019 The Xorm Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package dialects
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"strings"
|
|
"time"
|
|
|
|
"xorm.io/xorm/core"
|
|
"xorm.io/xorm/schemas"
|
|
)
|
|
|
|
// URI represents an uri to visit database
|
|
type URI struct {
|
|
DBType schemas.DBType
|
|
Proto string
|
|
Host string
|
|
Port string
|
|
DBName string
|
|
User string
|
|
Passwd string
|
|
Charset string
|
|
Laddr string
|
|
Raddr string
|
|
Timeout time.Duration
|
|
Schema string
|
|
}
|
|
|
|
// SetSchema set schema
|
|
func (uri *URI) SetSchema(schema string) {
|
|
// hack me
|
|
if uri.DBType == schemas.POSTGRES {
|
|
uri.Schema = strings.TrimSpace(schema)
|
|
}
|
|
}
|
|
|
|
// Dialect represents a kind of database
|
|
type Dialect interface {
|
|
Init(*URI) error
|
|
URI() *URI
|
|
SQLType(*schemas.Column) string
|
|
FormatBytes(b []byte) string
|
|
|
|
IsReserved(string) bool
|
|
Quoter() schemas.Quoter
|
|
SetQuotePolicy(quotePolicy QuotePolicy)
|
|
|
|
AutoIncrStr() string
|
|
|
|
GetIndexes(queryer core.Queryer, ctx context.Context, tableName string) (map[string]*schemas.Index, error)
|
|
IndexCheckSQL(tableName, idxName string) (string, []interface{})
|
|
CreateIndexSQL(tableName string, index *schemas.Index) string
|
|
DropIndexSQL(tableName string, index *schemas.Index) string
|
|
|
|
GetTables(queryer core.Queryer, ctx context.Context) ([]*schemas.Table, error)
|
|
IsTableExist(queryer core.Queryer, ctx context.Context, tableName string) (bool, error)
|
|
CreateTableSQL(table *schemas.Table, tableName string) ([]string, bool)
|
|
DropTableSQL(tableName string) (string, bool)
|
|
|
|
GetColumns(queryer core.Queryer, ctx context.Context, tableName string) ([]string, map[string]*schemas.Column, error)
|
|
IsColumnExist(queryer core.Queryer, ctx context.Context, tableName string, colName string) (bool, error)
|
|
AddColumnSQL(tableName string, col *schemas.Column) string
|
|
ModifyColumnSQL(tableName string, col *schemas.Column) string
|
|
|
|
ForUpdateSQL(query string) string
|
|
|
|
Filters() []Filter
|
|
SetParams(params map[string]string)
|
|
}
|
|
|
|
// Base represents a basic dialect and all real dialects could embed this struct
|
|
type Base struct {
|
|
dialect Dialect
|
|
uri *URI
|
|
quoter schemas.Quoter
|
|
}
|
|
|
|
func (b *Base) Quoter() schemas.Quoter {
|
|
return b.quoter
|
|
}
|
|
|
|
func (b *Base) Init(dialect Dialect, uri *URI) error {
|
|
b.dialect, b.uri = dialect, uri
|
|
return nil
|
|
}
|
|
|
|
func (b *Base) URI() *URI {
|
|
return b.uri
|
|
}
|
|
|
|
func (b *Base) DBType() schemas.DBType {
|
|
return b.uri.DBType
|
|
}
|
|
|
|
func (b *Base) FormatBytes(bs []byte) string {
|
|
return fmt.Sprintf("0x%x", bs)
|
|
}
|
|
|
|
func (db *Base) DropTableSQL(tableName string) (string, bool) {
|
|
quote := db.dialect.Quoter().Quote
|
|
return fmt.Sprintf("DROP TABLE IF EXISTS %s", quote(tableName)), true
|
|
}
|
|
|
|
func (db *Base) HasRecords(queryer core.Queryer, ctx context.Context, query string, args ...interface{}) (bool, error) {
|
|
rows, err := queryer.QueryContext(ctx, query, args...)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
defer rows.Close()
|
|
|
|
if rows.Next() {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func (db *Base) IsColumnExist(queryer core.Queryer, ctx context.Context, tableName, colName string) (bool, error) {
|
|
quote := db.dialect.Quoter().Quote
|
|
query := fmt.Sprintf(
|
|
"SELECT %v FROM %v.%v WHERE %v = ? AND %v = ? AND %v = ?",
|
|
quote("COLUMN_NAME"),
|
|
quote("INFORMATION_SCHEMA"),
|
|
quote("COLUMNS"),
|
|
quote("TABLE_SCHEMA"),
|
|
quote("TABLE_NAME"),
|
|
quote("COLUMN_NAME"),
|
|
)
|
|
return db.HasRecords(queryer, ctx, query, db.uri.DBName, tableName, colName)
|
|
}
|
|
|
|
func (db *Base) AddColumnSQL(tableName string, col *schemas.Column) string {
|
|
s, _ := ColumnString(db.dialect, col, true)
|
|
return fmt.Sprintf("ALTER TABLE %v ADD %v", db.dialect.Quoter().Quote(tableName), s)
|
|
}
|
|
|
|
func (db *Base) CreateIndexSQL(tableName string, index *schemas.Index) string {
|
|
quoter := db.dialect.Quoter()
|
|
var unique string
|
|
var idxName string
|
|
if index.Type == schemas.UniqueType {
|
|
unique = " UNIQUE"
|
|
}
|
|
idxName = index.XName(tableName)
|
|
return fmt.Sprintf("CREATE%s INDEX %v ON %v (%v)", unique,
|
|
quoter.Quote(idxName), quoter.Quote(tableName),
|
|
quoter.Join(index.Cols, ","))
|
|
}
|
|
|
|
func (db *Base) DropIndexSQL(tableName string, index *schemas.Index) string {
|
|
quote := db.dialect.Quoter().Quote
|
|
var name string
|
|
if index.IsRegular {
|
|
name = index.XName(tableName)
|
|
} else {
|
|
name = index.Name
|
|
}
|
|
return fmt.Sprintf("DROP INDEX %v ON %s", quote(name), quote(tableName))
|
|
}
|
|
|
|
func (db *Base) ModifyColumnSQL(tableName string, col *schemas.Column) string {
|
|
s, _ := ColumnString(db.dialect, col, false)
|
|
return fmt.Sprintf("alter table %s MODIFY COLUMN %s", tableName, s)
|
|
}
|
|
|
|
func (b *Base) ForUpdateSQL(query string) string {
|
|
return query + " FOR UPDATE"
|
|
}
|
|
|
|
func (b *Base) SetParams(params map[string]string) {
|
|
}
|
|
|
|
var (
|
|
dialects = map[string]func() Dialect{}
|
|
)
|
|
|
|
// RegisterDialect register database dialect
|
|
func RegisterDialect(dbName schemas.DBType, dialectFunc func() Dialect) {
|
|
if dialectFunc == nil {
|
|
panic("core: Register dialect is nil")
|
|
}
|
|
dialects[strings.ToLower(string(dbName))] = dialectFunc // !nashtsai! allow override dialect
|
|
}
|
|
|
|
// QueryDialect query if registered database dialect
|
|
func QueryDialect(dbName schemas.DBType) Dialect {
|
|
if d, ok := dialects[strings.ToLower(string(dbName))]; ok {
|
|
return d()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func regDrvsNDialects() bool {
|
|
providedDrvsNDialects := map[string]struct {
|
|
dbType schemas.DBType
|
|
getDriver func() Driver
|
|
getDialect func() Dialect
|
|
}{
|
|
"mssql": {"mssql", func() Driver { return &odbcDriver{} }, func() Dialect { return &mssql{} }},
|
|
"odbc": {"mssql", func() Driver { return &odbcDriver{} }, func() Dialect { return &mssql{} }}, // !nashtsai! TODO change this when supporting MS Access
|
|
"mysql": {"mysql", func() Driver { return &mysqlDriver{} }, func() Dialect { return &mysql{} }},
|
|
"mymysql": {"mysql", func() Driver { return &mymysqlDriver{} }, func() Dialect { return &mysql{} }},
|
|
"postgres": {"postgres", func() Driver { return &pqDriver{} }, func() Dialect { return &postgres{} }},
|
|
"pgx": {"postgres", func() Driver { return &pqDriverPgx{} }, func() Dialect { return &postgres{} }},
|
|
"sqlite3": {"sqlite3", func() Driver { return &sqlite3Driver{} }, func() Dialect { return &sqlite3{} }},
|
|
"oci8": {"oracle", func() Driver { return &oci8Driver{} }, func() Dialect { return &oracle{} }},
|
|
"goracle": {"oracle", func() Driver { return &goracleDriver{} }, func() Dialect { return &oracle{} }},
|
|
}
|
|
|
|
for driverName, v := range providedDrvsNDialects {
|
|
if driver := QueryDriver(driverName); driver == nil {
|
|
RegisterDriver(driverName, v.getDriver())
|
|
RegisterDialect(v.dbType, v.getDialect)
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func init() {
|
|
regDrvsNDialects()
|
|
}
|
|
|
|
// ColumnString generate column description string according dialect
|
|
func ColumnString(dialect Dialect, col *schemas.Column, includePrimaryKey bool) (string, error) {
|
|
bd := strings.Builder{}
|
|
|
|
if err := dialect.Quoter().QuoteTo(&bd, col.Name); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if err := bd.WriteByte(' '); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if _, err := bd.WriteString(dialect.SQLType(col)); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if err := bd.WriteByte(' '); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if includePrimaryKey && col.IsPrimaryKey {
|
|
if _, err := bd.WriteString("PRIMARY KEY "); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if col.IsAutoIncrement {
|
|
if _, err := bd.WriteString(dialect.AutoIncrStr()); err != nil {
|
|
return "", err
|
|
}
|
|
if err := bd.WriteByte(' '); err != nil {
|
|
return "", err
|
|
}
|
|
}
|
|
}
|
|
|
|
if col.Default != "" {
|
|
if _, err := bd.WriteString("DEFAULT "); err != nil {
|
|
return "", err
|
|
}
|
|
if _, err := bd.WriteString(col.Default); err != nil {
|
|
return "", err
|
|
}
|
|
if err := bd.WriteByte(' '); err != nil {
|
|
return "", err
|
|
}
|
|
}
|
|
|
|
if col.Nullable {
|
|
if _, err := bd.WriteString("NULL "); err != nil {
|
|
return "", err
|
|
}
|
|
} else {
|
|
if _, err := bd.WriteString("NOT NULL "); err != nil {
|
|
return "", err
|
|
}
|
|
}
|
|
|
|
return bd.String(), nil
|
|
}
|