mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-14 10:34:05 +00:00
aa7c34cf86
* fix error log when loading issues caused by a xorm bug * upgrade packages * fix fmt * fix Consistency * fix tests
206 lines
5.4 KiB
Markdown
206 lines
5.4 KiB
Markdown
# SQL builder
|
|
|
|
[](https://gitci.cn/go-xorm/builder) [](https://codecov.io/gh/go-xorm/builder)
|
|
[](https://goreportcard.com/report/github.com/go-xorm/builder)
|
|
|
|
Package builder is a lightweight and fast SQL builder for Go and XORM.
|
|
|
|
Make sure you have installed Go 1.8+ and then:
|
|
|
|
go get github.com/go-xorm/builder
|
|
|
|
# Insert
|
|
|
|
```Go
|
|
sql, args, err := builder.Insert(Eq{"c": 1, "d": 2}).Into("table1").ToSQL()
|
|
|
|
// INSERT INTO table1 SELECT * FROM table2
|
|
sql, err := builder.Insert().Into("table1").Select().From("table2").ToBoundSQL()
|
|
|
|
// INSERT INTO table1 (a, b) SELECT b, c FROM table2
|
|
sql, err = builder.Insert("a, b").Into("table1").Select("b, c").From("table2").ToBoundSQL()
|
|
```
|
|
|
|
# Select
|
|
|
|
```Go
|
|
// Simple Query
|
|
sql, args, err := Select("c, d").From("table1").Where(Eq{"a": 1}).ToSQL()
|
|
// With join
|
|
sql, args, err = Select("c, d").From("table1").LeftJoin("table2", Eq{"table1.id": 1}.And(Lt{"table2.id": 3})).
|
|
RightJoin("table3", "table2.id = table3.tid").Where(Eq{"a": 1}).ToSQL()
|
|
// From sub query
|
|
sql, args, err := Select("sub.id").From(Select("c").From("table1").Where(Eq{"a": 1}), "sub").Where(Eq{"b": 1}).ToSQL()
|
|
// From union query
|
|
sql, args, err = Select("sub.id").From(
|
|
Select("id").From("table1").Where(Eq{"a": 1}).Union("all", Select("id").From("table1").Where(Eq{"a": 2})),"sub").
|
|
Where(Eq{"b": 1}).ToSQL()
|
|
// With order by
|
|
sql, args, err = Select("a", "b", "c").From("table1").Where(Eq{"f1": "v1", "f2": "v2"}).
|
|
OrderBy("a ASC").ToSQL()
|
|
// With limit.
|
|
// Be careful! You should set up specific dialect for builder before performing a query with LIMIT
|
|
sql, args, err = Dialect(MYSQL).Select("a", "b", "c").From("table1").OrderBy("a ASC").
|
|
Limit(5, 10).ToSQL()
|
|
```
|
|
|
|
# Update
|
|
|
|
```Go
|
|
sql, args, err := Update(Eq{"a": 2}).From("table1").Where(Eq{"a": 1}).ToSQL()
|
|
```
|
|
|
|
# Delete
|
|
|
|
```Go
|
|
sql, args, err := Delete(Eq{"a": 1}).From("table1").ToSQL()
|
|
```
|
|
|
|
# Union
|
|
|
|
```Go
|
|
sql, args, err := Select("*").From("a").Where(Eq{"status": "1"}).
|
|
Union("all", Select("*").From("a").Where(Eq{"status": "2"})).
|
|
Union("distinct", Select("*").From("a").Where(Eq{"status": "3"})).
|
|
Union("", Select("*").From("a").Where(Eq{"status": "4"})).
|
|
ToSQL()
|
|
```
|
|
|
|
# Conditions
|
|
|
|
* `Eq` is a redefine of a map, you can give one or more conditions to `Eq`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Eq{"a":1})
|
|
// a=? [1]
|
|
sql, args, _ := ToSQL(Eq{"b":"c"}.And(Eq{"c": 0}))
|
|
// b=? AND c=? ["c", 0]
|
|
sql, args, _ := ToSQL(Eq{"b":"c", "c":0})
|
|
// b=? AND c=? ["c", 0]
|
|
sql, args, _ := ToSQL(Eq{"b":"c"}.Or(Eq{"b":"d"}))
|
|
// b=? OR b=? ["c", "d"]
|
|
sql, args, _ := ToSQL(Eq{"b": []string{"c", "d"}})
|
|
// b IN (?,?) ["c", "d"]
|
|
sql, args, _ := ToSQL(Eq{"b": 1, "c":[]int{2, 3}})
|
|
// b=? AND c IN (?,?) [1, 2, 3]
|
|
```
|
|
|
|
* `Neq` is the same to `Eq`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Neq{"a":1})
|
|
// a<>? [1]
|
|
sql, args, _ := ToSQL(Neq{"b":"c"}.And(Neq{"c": 0}))
|
|
// b<>? AND c<>? ["c", 0]
|
|
sql, args, _ := ToSQL(Neq{"b":"c", "c":0})
|
|
// b<>? AND c<>? ["c", 0]
|
|
sql, args, _ := ToSQL(Neq{"b":"c"}.Or(Neq{"b":"d"}))
|
|
// b<>? OR b<>? ["c", "d"]
|
|
sql, args, _ := ToSQL(Neq{"b": []string{"c", "d"}})
|
|
// b NOT IN (?,?) ["c", "d"]
|
|
sql, args, _ := ToSQL(Neq{"b": 1, "c":[]int{2, 3}})
|
|
// b<>? AND c NOT IN (?,?) [1, 2, 3]
|
|
```
|
|
|
|
* `Gt`, `Gte`, `Lt`, `Lte`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Gt{"a", 1}.And(Gte{"b", 2}))
|
|
// a>? AND b>=? [1, 2]
|
|
sql, args, _ := ToSQL(Lt{"a", 1}.Or(Lte{"b", 2}))
|
|
// a<? OR b<=? [1, 2]
|
|
```
|
|
|
|
* `Like`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Like{"a", "c"})
|
|
// a LIKE ? [%c%]
|
|
```
|
|
|
|
* `Expr` you can customerize your sql with `Expr`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Expr("a = ? ", 1))
|
|
// a = ? [1]
|
|
sql, args, _ := ToSQL(Eq{"a": Expr("select id from table where c = ?", 1)})
|
|
// a=(select id from table where c = ?) [1]
|
|
```
|
|
|
|
* `In` and `NotIn`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(In("a", 1, 2, 3))
|
|
// a IN (?,?,?) [1,2,3]
|
|
sql, args, _ := ToSQL(In("a", []int{1, 2, 3}))
|
|
// a IN (?,?,?) [1,2,3]
|
|
sql, args, _ := ToSQL(In("a", Expr("select id from b where c = ?", 1))))
|
|
// a IN (select id from b where c = ?) [1]
|
|
```
|
|
|
|
* `IsNull` and `NotNull`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(IsNull{"a"})
|
|
// a IS NULL []
|
|
sql, args, _ := ToSQL(NotNull{"b"})
|
|
// b IS NOT NULL []
|
|
```
|
|
|
|
* `And(conds ...Cond)`, And can connect one or more condtions via And
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(And(Eq{"a":1}, Like{"b", "c"}, Neq{"d", 2}))
|
|
// a=? AND b LIKE ? AND d<>? [1, %c%, 2]
|
|
```
|
|
|
|
* `Or(conds ...Cond)`, Or can connect one or more conditions via Or
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Or(Eq{"a":1}, Like{"b", "c"}, Neq{"d", 2}))
|
|
// a=? OR b LIKE ? OR d<>? [1, %c%, 2]
|
|
sql, args, _ := ToSQL(Or(Eq{"a":1}, And(Like{"b", "c"}, Neq{"d", 2})))
|
|
// a=? OR (b LIKE ? AND d<>?) [1, %c%, 2]
|
|
```
|
|
|
|
* `Between`
|
|
|
|
```Go
|
|
import . "github.com/go-xorm/builder"
|
|
|
|
sql, args, _ := ToSQL(Between{"a", 1, 2})
|
|
// a BETWEEN 1 AND 2
|
|
```
|
|
|
|
* Define yourself conditions
|
|
|
|
Since `Cond` is an interface.
|
|
|
|
```Go
|
|
type Cond interface {
|
|
WriteTo(Writer) error
|
|
And(...Cond) Cond
|
|
Or(...Cond) Cond
|
|
IsValid() bool
|
|
}
|
|
```
|
|
|
|
You can define yourself conditions and compose with other `Cond`. |