SQLDelight：如何动态创建表？

Posted 2023-04-15

【中文标题】SQLDelight：如何动态创建表？

【英文标题】：SQLDelight: how to create table dynamically?

【发布时间】：2021-06-22 05:10:45

【问题描述】：

我看到了我们可以使用 sq 这样的文件创建具有固定名称的表的示例

CREATE TABLE hockeyPlayer (
  player_number INTEGER NOT NULL,
  full_name TEXT NOT NULL
);

我需要在运行时创建具有任意名称的表，我该如何实现？

UPD

在这种情况下，我似乎必须手动执行所有查询（就像在生成的类中完成的那样）

val driver = DatabaseDriverFactory().createDriver(databaseName)
val tableName = "table2"
driver.execute(null, "CREATE TABLE IF NOT EXISTS $tableName (player_number INTEGER NOT NULL, full_name TEXT NOT NULL", 0, null)

【参考方案1】：

这是手动/动态表创建和操作的示例

    fun test(databaseName: String, key: String?) 
        val driver = DatabaseDriverFactory().createDriver(databaseName, key)
        val tableName = "table2"
        val identifier = 1

        // identifier here must be null to avoid SQLiteBindOrColumnIndexOutOfRangeException
        // in INSERT statements below
        driver.execute(null, "CREATE TABLE IF NOT EXISTS $tableName (player_number INTEGER NOT NULL, full_name TEXT NOT NULL)", 0, null)
        var cursor = driver.executeQuery(identifier, "SELECT * FROM $tableName", 0, null)

        if (!cursor.next()) 
            Napier.i("EMPTY TEST DB")
            driver.execute(identifier, "INSERT INTO $tableName (player_number, full_name) VALUES (?, ?)", 2) 
                // indices start here from 1
                bindLong(1, 1)
                bindString(2, "John")
            
            driver.execute(identifier, "INSERT INTO $tableName (player_number, full_name) VALUES (?, ?)", 2) 
                bindLong(1, 2)
                bindString(2, "Mike")
            
        

        cursor = driver.executeQuery(identifier, "SELECT * FROM $tableName", 0, null)

        while (cursor.next()) 
            // indices start here from 0
            val number = cursor.getLong(0)
            val name = cursor.getString(1)
            Napier.i("Player #$number $name")