mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-27 06:37:30 +02:00
* fix error log when loading issues caused by a xorm bug * upgrade packages * fix fmt * fix Consistency * fix tests
395 lines
7.9 KiB
Go
395 lines
7.9 KiB
Go
// Copyright 2016 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 builder
|
|
|
|
import (
|
|
sql2 "database/sql"
|
|
"fmt"
|
|
"sort"
|
|
)
|
|
|
|
type optype byte
|
|
|
|
const (
|
|
condType optype = iota // only conditions
|
|
selectType // select
|
|
insertType // insert
|
|
updateType // update
|
|
deleteType // delete
|
|
unionType // union
|
|
)
|
|
|
|
const (
|
|
POSTGRES = "postgres"
|
|
SQLITE = "sqlite3"
|
|
MYSQL = "mysql"
|
|
MSSQL = "mssql"
|
|
ORACLE = "oracle"
|
|
)
|
|
|
|
type join struct {
|
|
joinType string
|
|
joinTable string
|
|
joinCond Cond
|
|
}
|
|
|
|
type union struct {
|
|
unionType string
|
|
builder *Builder
|
|
}
|
|
|
|
type limit struct {
|
|
limitN int
|
|
offset int
|
|
}
|
|
|
|
// Builder describes a SQL statement
|
|
type Builder struct {
|
|
optype
|
|
dialect string
|
|
isNested bool
|
|
into string
|
|
from string
|
|
subQuery *Builder
|
|
cond Cond
|
|
selects []string
|
|
joins []join
|
|
unions []union
|
|
limitation *limit
|
|
insertCols []string
|
|
insertVals []interface{}
|
|
updates []Eq
|
|
orderBy string
|
|
groupBy string
|
|
having string
|
|
}
|
|
|
|
// Dialect sets the db dialect of Builder.
|
|
func Dialect(dialect string) *Builder {
|
|
builder := &Builder{cond: NewCond(), dialect: dialect}
|
|
return builder
|
|
}
|
|
|
|
// MySQL is shortcut of Dialect(MySQL)
|
|
func MySQL() *Builder {
|
|
return Dialect(MYSQL)
|
|
}
|
|
|
|
// MsSQL is shortcut of Dialect(MsSQL)
|
|
func MsSQL() *Builder {
|
|
return Dialect(MSSQL)
|
|
}
|
|
|
|
// Oracle is shortcut of Dialect(Oracle)
|
|
func Oracle() *Builder {
|
|
return Dialect(ORACLE)
|
|
}
|
|
|
|
// Postgres is shortcut of Dialect(Postgres)
|
|
func Postgres() *Builder {
|
|
return Dialect(POSTGRES)
|
|
}
|
|
|
|
// SQLite is shortcut of Dialect(SQLITE)
|
|
func SQLite() *Builder {
|
|
return Dialect(SQLITE)
|
|
}
|
|
|
|
// Where sets where SQL
|
|
func (b *Builder) Where(cond Cond) *Builder {
|
|
if b.cond.IsValid() {
|
|
b.cond = b.cond.And(cond)
|
|
} else {
|
|
b.cond = cond
|
|
}
|
|
return b
|
|
}
|
|
|
|
// From sets from subject(can be a table name in string or a builder pointer) and its alias
|
|
func (b *Builder) From(subject interface{}, alias ...string) *Builder {
|
|
switch subject.(type) {
|
|
case *Builder:
|
|
b.subQuery = subject.(*Builder)
|
|
|
|
if len(alias) > 0 {
|
|
b.from = alias[0]
|
|
} else {
|
|
b.isNested = true
|
|
}
|
|
case string:
|
|
b.from = subject.(string)
|
|
|
|
if len(alias) > 0 {
|
|
b.from = b.from + " " + alias[0]
|
|
}
|
|
}
|
|
|
|
return b
|
|
}
|
|
|
|
// TableName returns the table name
|
|
func (b *Builder) TableName() string {
|
|
if b.optype == insertType {
|
|
return b.into
|
|
}
|
|
return b.from
|
|
}
|
|
|
|
// Into sets insert table name
|
|
func (b *Builder) Into(tableName string) *Builder {
|
|
b.into = tableName
|
|
return b
|
|
}
|
|
|
|
// Join sets join table and conditions
|
|
func (b *Builder) Join(joinType, joinTable string, joinCond interface{}) *Builder {
|
|
switch joinCond.(type) {
|
|
case Cond:
|
|
b.joins = append(b.joins, join{joinType, joinTable, joinCond.(Cond)})
|
|
case string:
|
|
b.joins = append(b.joins, join{joinType, joinTable, Expr(joinCond.(string))})
|
|
}
|
|
|
|
return b
|
|
}
|
|
|
|
// Union sets union conditions
|
|
func (b *Builder) Union(unionTp string, unionCond *Builder) *Builder {
|
|
var builder *Builder
|
|
if b.optype != unionType {
|
|
builder = &Builder{cond: NewCond()}
|
|
builder.optype = unionType
|
|
builder.dialect = b.dialect
|
|
builder.selects = b.selects
|
|
|
|
currentUnions := b.unions
|
|
// erase sub unions (actually append to new Builder.unions)
|
|
b.unions = nil
|
|
|
|
for e := range currentUnions {
|
|
currentUnions[e].builder.dialect = b.dialect
|
|
}
|
|
|
|
builder.unions = append(append(builder.unions, union{"", b}), currentUnions...)
|
|
} else {
|
|
builder = b
|
|
}
|
|
|
|
if unionCond != nil {
|
|
if unionCond.dialect == "" && builder.dialect != "" {
|
|
unionCond.dialect = builder.dialect
|
|
}
|
|
|
|
builder.unions = append(builder.unions, union{unionTp, unionCond})
|
|
}
|
|
|
|
return builder
|
|
}
|
|
|
|
// Limit sets limitN condition
|
|
func (b *Builder) Limit(limitN int, offset ...int) *Builder {
|
|
b.limitation = &limit{limitN: limitN}
|
|
|
|
if len(offset) > 0 {
|
|
b.limitation.offset = offset[0]
|
|
}
|
|
|
|
return b
|
|
}
|
|
|
|
// InnerJoin sets inner join
|
|
func (b *Builder) InnerJoin(joinTable string, joinCond interface{}) *Builder {
|
|
return b.Join("INNER", joinTable, joinCond)
|
|
}
|
|
|
|
// LeftJoin sets left join SQL
|
|
func (b *Builder) LeftJoin(joinTable string, joinCond interface{}) *Builder {
|
|
return b.Join("LEFT", joinTable, joinCond)
|
|
}
|
|
|
|
// RightJoin sets right join SQL
|
|
func (b *Builder) RightJoin(joinTable string, joinCond interface{}) *Builder {
|
|
return b.Join("RIGHT", joinTable, joinCond)
|
|
}
|
|
|
|
// CrossJoin sets cross join SQL
|
|
func (b *Builder) CrossJoin(joinTable string, joinCond interface{}) *Builder {
|
|
return b.Join("CROSS", joinTable, joinCond)
|
|
}
|
|
|
|
// FullJoin sets full join SQL
|
|
func (b *Builder) FullJoin(joinTable string, joinCond interface{}) *Builder {
|
|
return b.Join("FULL", joinTable, joinCond)
|
|
}
|
|
|
|
// Select sets select SQL
|
|
func (b *Builder) Select(cols ...string) *Builder {
|
|
b.selects = cols
|
|
if b.optype == condType {
|
|
b.optype = selectType
|
|
}
|
|
return b
|
|
}
|
|
|
|
// And sets AND condition
|
|
func (b *Builder) And(cond Cond) *Builder {
|
|
b.cond = And(b.cond, cond)
|
|
return b
|
|
}
|
|
|
|
// Or sets OR condition
|
|
func (b *Builder) Or(cond Cond) *Builder {
|
|
b.cond = Or(b.cond, cond)
|
|
return b
|
|
}
|
|
|
|
type insertColsSorter struct {
|
|
cols []string
|
|
vals []interface{}
|
|
}
|
|
|
|
func (s insertColsSorter) Len() int {
|
|
return len(s.cols)
|
|
}
|
|
func (s insertColsSorter) Swap(i, j int) {
|
|
s.cols[i], s.cols[j] = s.cols[j], s.cols[i]
|
|
s.vals[i], s.vals[j] = s.vals[j], s.vals[i]
|
|
}
|
|
|
|
func (s insertColsSorter) Less(i, j int) bool {
|
|
return s.cols[i] < s.cols[j]
|
|
}
|
|
|
|
// Insert sets insert SQL
|
|
func (b *Builder) Insert(eq ...interface{}) *Builder {
|
|
if len(eq) > 0 {
|
|
var paramType = -1
|
|
for _, e := range eq {
|
|
switch t := e.(type) {
|
|
case Eq:
|
|
if paramType == -1 {
|
|
paramType = 0
|
|
}
|
|
if paramType != 0 {
|
|
break
|
|
}
|
|
for k, v := range t {
|
|
b.insertCols = append(b.insertCols, k)
|
|
b.insertVals = append(b.insertVals, v)
|
|
}
|
|
case string:
|
|
if paramType == -1 {
|
|
paramType = 1
|
|
}
|
|
if paramType != 1 {
|
|
break
|
|
}
|
|
b.insertCols = append(b.insertCols, t)
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(b.insertCols) == len(b.insertVals) {
|
|
sort.Sort(insertColsSorter{
|
|
cols: b.insertCols,
|
|
vals: b.insertVals,
|
|
})
|
|
}
|
|
b.optype = insertType
|
|
return b
|
|
}
|
|
|
|
// Update sets update SQL
|
|
func (b *Builder) Update(updates ...Eq) *Builder {
|
|
b.updates = make([]Eq, 0, len(updates))
|
|
for _, update := range updates {
|
|
if update.IsValid() {
|
|
b.updates = append(b.updates, update)
|
|
}
|
|
}
|
|
b.optype = updateType
|
|
return b
|
|
}
|
|
|
|
// Delete sets delete SQL
|
|
func (b *Builder) Delete(conds ...Cond) *Builder {
|
|
b.cond = b.cond.And(conds...)
|
|
b.optype = deleteType
|
|
return b
|
|
}
|
|
|
|
// WriteTo implements Writer interface
|
|
func (b *Builder) WriteTo(w Writer) error {
|
|
switch b.optype {
|
|
/*case condType:
|
|
return b.cond.WriteTo(w)*/
|
|
case selectType:
|
|
return b.selectWriteTo(w)
|
|
case insertType:
|
|
return b.insertWriteTo(w)
|
|
case updateType:
|
|
return b.updateWriteTo(w)
|
|
case deleteType:
|
|
return b.deleteWriteTo(w)
|
|
case unionType:
|
|
return b.unionWriteTo(w)
|
|
}
|
|
|
|
return ErrNotSupportType
|
|
}
|
|
|
|
// ToSQL convert a builder to SQL and args
|
|
func (b *Builder) ToSQL() (string, []interface{}, error) {
|
|
w := NewWriter()
|
|
if err := b.WriteTo(w); err != nil {
|
|
return "", nil, err
|
|
}
|
|
|
|
// in case of sql.NamedArg in args
|
|
for e := range w.args {
|
|
if namedArg, ok := w.args[e].(sql2.NamedArg); ok {
|
|
w.args[e] = namedArg.Value
|
|
}
|
|
}
|
|
|
|
var sql = w.writer.String()
|
|
var err error
|
|
|
|
switch b.dialect {
|
|
case ORACLE, MSSQL:
|
|
// This is for compatibility with different sql drivers
|
|
for e := range w.args {
|
|
w.args[e] = sql2.Named(fmt.Sprintf("p%d", e+1), w.args[e])
|
|
}
|
|
|
|
var prefix string
|
|
if b.dialect == ORACLE {
|
|
prefix = ":p"
|
|
} else {
|
|
prefix = "@p"
|
|
}
|
|
|
|
if sql, err = ConvertPlaceholder(sql, prefix); err != nil {
|
|
return "", nil, err
|
|
}
|
|
case POSTGRES:
|
|
if sql, err = ConvertPlaceholder(sql, "$"); err != nil {
|
|
return "", nil, err
|
|
}
|
|
}
|
|
|
|
return sql, w.args, nil
|
|
}
|
|
|
|
// ToBoundSQL
|
|
func (b *Builder) ToBoundSQL() (string, error) {
|
|
w := NewWriter()
|
|
if err := b.WriteTo(w); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return ConvertToBoundSQL(w.writer.String(), w.args)
|
|
}
|