commit	1ded5784535dcffa4e175d4efbd1ca2706927758	[log] [tgz]
author	Vojtech Vitek (golang.cz) <vojtech.vitek@gmail.com>	Tue Feb 27 16:32:15 2024
committer	GitHub <noreply@github.com>	Tue Feb 27 16:32:15 2024
tree	b8f1899043259b5e1faeda9b4452780df525181d
parent	d8eb51bf129800f02602eaef1a44c220a69ccc36 [diff]

tree: b8f1899043259b5e1faeda9b4452780df525181d

README.md

Squirrel is “complete”.

Bug fixes will still be merged (slowly). Bug reports are welcome, but I will not necessarily respond to them. If another fork (or substantially similar project) actively improves on what Squirrel does, let me know and I may link to it here.

Squirrel - fluent SQL generator for Go

import "github.com/Masterminds/squirrel"

Squirrel is not an ORM. For an application of Squirrel, check out structable, a table-struct mapper

Squirrel helps you build SQL queries from composable parts:

import sq "github.com/Masterminds/squirrel"

users := sq.Select("*").From("users").Join("emails USING (email_id)")

active := users.Where(sq.Eq{"deleted_at": nil})

sql, args, err := active.ToSql()

sql == "SELECT * FROM users JOIN emails USING (email_id) WHERE deleted_at IS NULL"

sql, args, err := sq.
    Insert("users").Columns("name", "age").
    Values("moe", 13).Values("larry", sq.Expr("? + 5", 12)).
    ToSql()

sql == "INSERT INTO users (name,age) VALUES (?,?),(?,? + 5)"

Squirrel can also execute queries directly:

stooges := users.Where(sq.Eq{"username": []string{"moe", "larry", "curly", "shemp"}})
three_stooges := stooges.Limit(3)
rows, err := three_stooges.RunWith(db).Query()

// Behaves like:
rows, err := db.Query("SELECT * FROM users WHERE username IN (?,?,?,?) LIMIT 3",
                      "moe", "larry", "curly", "shemp")

Squirrel makes conditional query building a breeze:

if len(q) > 0 {
    users = users.Where("name LIKE ?", fmt.Sprint("%", q, "%"))
}

Squirrel wants to make your life easier:

// StmtCache caches Prepared Stmts for you
dbCache := sq.NewStmtCache(db)

// StatementBuilder keeps your syntax neat
mydb := sq.StatementBuilder.RunWith(dbCache)
select_users := mydb.Select("*").From("users")

Squirrel loves PostgreSQL:

psql := sq.StatementBuilder.PlaceholderFormat(sq.Dollar)

// You use question marks for placeholders...
sql, _, _ := psql.Select("*").From("elephants").Where("name IN (?,?)", "Dumbo", "Verna").ToSql()

/// ...squirrel replaces them using PlaceholderFormat.
sql == "SELECT * FROM elephants WHERE name IN ($1,$2)"


/// You can retrieve id ...
query := sq.Insert("nodes").
    Columns("uuid", "type", "data").
    Values(node.Uuid, node.Type, node.Data).
    Suffix("RETURNING \"id\"").
    RunWith(m.db).
    PlaceholderFormat(sq.Dollar)

query.QueryRow().Scan(&node.id)

You can escape question marks by inserting two question marks:

SELECT * FROM nodes WHERE meta->'format' ??| array[?,?]

will generate with the Dollar Placeholder:

SELECT * FROM nodes WHERE meta->'format' ?| array[$1,$2]

FAQ

How can I build an IN query on composite keys / tuples, e.g. WHERE (col1, col2) IN ((1,2),(3,4))? (#104)
Squirrel does not explicitly support tuples, but you can get the same effect with e.g.:
```
sq.Or{
  sq.Eq{"col1": 1, "col2": 2},
  sq.Eq{"col1": 3, "col2": 4}}
```
```
WHERE (col1 = 1 AND col2 = 2) OR (col1 = 3 AND col2 = 4)
```
(which should produce the same query plan as the tuple version)
Why doesn't Eq{"mynumber": []uint8{1,2,3}} turn into an IN query? (#114)
Values of type []byte are handled specially by database/sql. In Go, byte is just an alias of uint8, so there is no way to distinguish []uint8 from []byte.
Some features are poorly documented!
This isn't a frequent complaints section!
Some features are poorly documented?
Yes. The tests should be considered a part of the documentation; take a look at those for ideas on how to express more complex queries.

License

Squirrel is released under the MIT License.