sqrl - fat-free version of squirrel - fluent SQL generator for Go
Non thread safe fork of squirrel. The same handy fluffy helper, but with extra letters removed :)
import "github.com/elgris/sqrl"
Requires Go 1.8 and higher
Inspired by
Why to make good squirrel lighter?
Ask benchmarks about that ;). Squirrel is good, reliable and thread-safe with it's immutable query builder. Although immutability is nice, it's resource consuming and sometimes redundant. As authors of dbr say: "100% of our application code was written without the need for this".
Why not to use dbr then?
Although, dbr's query builder is proven to be much faster than squirrel and even faster than sqrl, it doesn't have all syntax sugar. Especially I miss support of JOINs, subqueries and aliases.
Usage
sqrl is not an ORM., it helps you build SQL queries from composable parts. sqrl is non thread safe. SQL builders change their state, so using the same builder in parallel is dangerous.
It's very easy to switch between original squirrel and sqrl, because there is no change in interface:
import sq "github.com/elgris/sqrl" // you can easily use github.com/lann/squirrel here
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)"
Like squirrel, sqrl can 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")
Build conditional queries with ease:
if len(q) > 0 {
users = users.Where("name LIKE ?", q)
}
MySQL-specific functions
Multi-table delete
sql, args, err := sq.Delete("a1", "a2").
From("z1 AS a1").
JoinClause("INNER JOIN a2 ON a1.id = a2.ref_id").
Where("b = ?", 1).
ToSql()
sql, args, err := sq.Delete("a1").
Using("a2").
Where("a1.id = a2.ref_id AND a2.num = ?", 42).
ToSql()
PostgreSQL-specific functions
Package pg contains PostgreSQL specific operators.
Update from
sql, args, err := sq.Update("a1").
Set("foo", 1).
From("a2").
Where("id = a2.ref_id AND a2.num = ?", 42).
ToSql()
Delete using
sql, args, err := sq.Delete("a1").
Using("a2").
Where("id = a2.ref_id AND a2.num = ?", 42).
ToSql()
Returning clause
sql, args, err := Update("a").
Set("foo", 1).
Where("id = ?", 42).
Returning("bar").
ToSql()
JSON values
JSON and JSONB use json.Marshal to serialize values and cast them to appropriate column type.
sql, args, err := sq.Insert("posts").
Columns("content", "tags").
Values("Lorem Ipsum", pg.JSONB([]string{"foo", "bar"})).
ToSql()
Array values
Array serializes single and multidimensional slices of string, int, float32 and float64 values.
sql, args, err := sqrl.Insert("posts").
Columns("content", "tags").
Values("Lorem Ipsum", pg.Array([]string{"foo", "bar"})).
ToSql()
License
Sqrl is released under the MIT License.
