SQLDelight:如何动态创建 table?
SQLDelight: how to create table dynamically?
我看到了一些示例,其中我们可以使用 sq
文件创建具有固定名称的 table
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 tables,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)
这里是 manual/dynamic table 创建和操作的例子
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")
}
}
我看到了一些示例,其中我们可以使用 sq
文件创建具有固定名称的 table
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 tables,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)
这里是 manual/dynamic table 创建和操作的例子
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")
}
}