68 lines
1.9 KiB
Go
68 lines
1.9 KiB
Go
// Copyright 2018 Huan Du. All rights reserved.
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// Licensed under the MIT license that can be found in the LICENSE file.
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package sqlbuilder
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import (
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"database/sql"
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"fmt"
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)
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func ExampleSelectBuilder() {
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sb := NewSelectBuilder()
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sb.Distinct().Select("id", "name", sb.As("COUNT(*)", "t"))
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sb.From("demo.user")
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sb.Where(
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sb.GreaterThan("id", 1234),
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sb.Like("name", "%Du"),
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sb.Or(
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sb.IsNull("id_card"),
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sb.In("status", 1, 2, 5),
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),
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sb.NotIn(
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"id",
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NewSelectBuilder().Select("id").From("banned"),
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), // Nested SELECT.
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"modified_at > created_at + "+sb.Var(86400), // It's allowed to write arbitrary SQL.
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)
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sb.GroupBy("status").Having(sb.NotIn("status", 4, 5))
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sb.OrderBy("modified_at").Asc()
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sb.Limit(10).Offset(5)
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sql, args := sb.Build()
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fmt.Println(sql)
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fmt.Println(args)
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// Output:
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// SELECT DISTINCT id, name, COUNT(*) AS t FROM demo.user WHERE id > ? AND name LIKE ? AND (id_card IS NULL OR status IN (?, ?, ?)) AND id NOT IN (SELECT id FROM banned) AND modified_at > created_at + ? GROUP BY status HAVING status NOT IN (?, ?) ORDER BY modified_at ASC LIMIT 10 OFFSET 5
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// [1234 %Du 1 2 5 86400 4 5]
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}
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func ExampleSelectBuilder_advancedUsage() {
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sb := NewSelectBuilder()
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innerSb := NewSelectBuilder()
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sb.Select("id", "name")
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sb.From(
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sb.BuilderAs(innerSb, "user"),
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)
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sb.Where(
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sb.In("status", Flatten([]int{1, 2, 3})...),
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sb.Between("created_at", sql.Named("start", 1234567890), sql.Named("end", 1234599999)),
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)
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innerSb.Select("*")
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innerSb.From("banned")
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innerSb.Where(
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innerSb.NotIn("name", Flatten([]string{"Huan Du", "Charmy Liu"})...),
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)
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sql, args := sb.Build()
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fmt.Println(sql)
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fmt.Println(args)
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// Output:
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// SELECT id, name FROM (SELECT * FROM banned WHERE name NOT IN (?, ?)) AS user WHERE status IN (?, ?, ?) AND created_at BETWEEN @start AND @end
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// [Huan Du Charmy Liu 1 2 3 {{} start 1234567890} {{} end 1234599999}]
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}
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