mirror of
https://github.com/hanzoai/sqlbuilder.git
synced 2026-10-01 00:37:42 +00:00
Huan Du
b15ca56b4d
All builders add a new method called SQL to enable us to add any arbitrary SQL when building. It's quite useful when we are using some kinds of extension syntax or add special comments in SQL.
72 lines
3.2 KiB
Go
72 lines
3.2 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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"fmt"
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)
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func ExampleCreateTable() {
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sql := CreateTable("demo.user").IfNotExists().
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Define("id", "BIGINT(20)", "NOT NULL", "AUTO_INCREMENT", "PRIMARY KEY", `COMMENT "user id"`).
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String()
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fmt.Println(sql)
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// Output:
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// CREATE TABLE IF NOT EXISTS demo.user (id BIGINT(20) NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT "user id")
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}
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func ExampleCreateTableBuilder() {
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ctb := NewCreateTableBuilder()
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ctb.CreateTable("demo.user").IfNotExists()
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ctb.Define("id", "BIGINT(20)", "NOT NULL", "AUTO_INCREMENT", "PRIMARY KEY", `COMMENT "user id"`)
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ctb.Define("name", "VARCHAR(255)", "NOT NULL", `COMMENT "user name"`)
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ctb.Define("created_at", "DATETIME", "NOT NULL", `COMMENT "user create time"`)
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ctb.Define("modified_at", "DATETIME", "NOT NULL", `COMMENT "user modify time"`)
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ctb.Define("KEY", "idx_name_modified_at", "name, modified_at")
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ctb.Option("DEFAULT CHARACTER SET", "utf8mb4")
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fmt.Println(ctb)
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// Output:
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// CREATE TABLE IF NOT EXISTS demo.user (id BIGINT(20) NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT "user id", name VARCHAR(255) NOT NULL COMMENT "user name", created_at DATETIME NOT NULL COMMENT "user create time", modified_at DATETIME NOT NULL COMMENT "user modify time", KEY idx_name_modified_at name, modified_at) DEFAULT CHARACTER SET utf8mb4
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}
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func ExampleCreateTableBuilder_tempTable() {
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ctb := NewCreateTableBuilder()
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ctb.CreateTempTable("demo.user").IfNotExists()
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ctb.Define("id", "BIGINT(20)", "NOT NULL", "AUTO_INCREMENT", "PRIMARY KEY", `COMMENT "user id"`)
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ctb.Define("name", "VARCHAR(255)", "NOT NULL", `COMMENT "user name"`)
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ctb.Define("created_at", "DATETIME", "NOT NULL", `COMMENT "user create time"`)
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ctb.Define("modified_at", "DATETIME", "NOT NULL", `COMMENT "user modify time"`)
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ctb.Define("KEY", "idx_name_modified_at", "name, modified_at")
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ctb.Option("DEFAULT CHARACTER SET", "utf8mb4")
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fmt.Println(ctb)
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// Output:
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// CREATE TEMPORARY TABLE IF NOT EXISTS demo.user (id BIGINT(20) NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT "user id", name VARCHAR(255) NOT NULL COMMENT "user name", created_at DATETIME NOT NULL COMMENT "user create time", modified_at DATETIME NOT NULL COMMENT "user modify time", KEY idx_name_modified_at name, modified_at) DEFAULT CHARACTER SET utf8mb4
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}
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func ExampleCreateTableBuilder_SQL() {
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ctb := NewCreateTableBuilder()
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ctb.SQL(`/* before */`)
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ctb.CreateTempTable("demo.user").IfNotExists()
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ctb.SQL("/* after create */")
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ctb.Define("id", "BIGINT(20)", "NOT NULL", "AUTO_INCREMENT", "PRIMARY KEY", `COMMENT "user id"`)
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ctb.Define("name", "VARCHAR(255)", "NOT NULL", `COMMENT "user name"`)
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ctb.SQL("/* after define */")
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ctb.Option("DEFAULT CHARACTER SET", "utf8mb4")
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ctb.SQL(ctb.Var(Build("AS SELECT * FROM old.user WHERE name LIKE $?", "%Huan%")))
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sql, args := ctb.Build()
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fmt.Println(sql)
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fmt.Println(args)
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// Output:
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// /* before */ CREATE TEMPORARY TABLE IF NOT EXISTS demo.user /* after create */ (id BIGINT(20) NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT "user id", name VARCHAR(255) NOT NULL COMMENT "user name") /* after define */ DEFAULT CHARACTER SET utf8mb4 AS SELECT * FROM old.user WHERE name LIKE ?
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// [%Huan%]
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}
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