82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
// Copyright (C) 2015 Audrius Butkevicius and Contributors (see the CONTRIBUTORS file).
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package main
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import (
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"database/sql"
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"fmt"
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"log"
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"github.com/cznic/ql"
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)
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func init() {
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ql.RegisterDriver()
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register("ql", qlSetup, qlCompile)
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}
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func qlSetup(db *sql.DB) (err error) {
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tx, err := db.Begin()
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if err != nil {
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return
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}
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defer func() {
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if err == nil {
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err = tx.Commit()
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} else {
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tx.Rollback()
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}
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}()
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_, err = tx.Exec(`CREATE TABLE IF NOT EXISTS Devices (
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DeviceID STRING NOT NULL,
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Seen TIME NOT NULL
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)`)
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if err != nil {
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return
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}
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if _, err = tx.Exec(`CREATE INDEX IF NOT EXISTS DevicesDeviceIDIndex ON Devices (DeviceID)`); err != nil {
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return
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}
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_, err = tx.Exec(`CREATE TABLE IF NOT EXISTS Addresses (
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DeviceID STRING NOT NULL,
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Seen TIME NOT NULL,
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Address STRING NOT NULL,
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)`)
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if err != nil {
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return
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}
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_, err = tx.Exec(`CREATE INDEX IF NOT EXISTS AddressesDeviceIDAddressIndex ON Addresses (DeviceID, Address)`)
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return
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}
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func qlCompile(db *sql.DB) (map[string]*sql.Stmt, error) {
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stmts := map[string]string{
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"cleanAddress": `DELETE FROM Addresses WHERE Seen < now() - duration("2h")`,
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"cleanDevice": fmt.Sprintf(`DELETE FROM Devices WHERE Seen < now() - duration("%dh")`, maxDeviceAge/3600),
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"countAddress": "SELECT count(*) FROM Addresses",
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"countDevice": "SELECT count(*) FROM Devices",
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"insertAddress": "INSERT INTO Addresses (DeviceID, Seen, Address) VALUES ($1, now(), $2)",
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"insertDevice": "INSERT INTO Devices (DeviceID, Seen) VALUES ($1, now())",
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"selectAddress": `SELECT Address from Addresses WHERE DeviceID==$1 AND Seen > now() - duration("1h") LIMIT 16`,
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"selectDevice": "SELECT Seen FROM Devices WHERE DeviceID==$1",
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"updateAddress": "UPDATE Addresses Seen=now() WHERE DeviceID==$1 AND Address==$2",
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"updateDevice": "UPDATE Devices Seen=now() WHERE DeviceID==$1",
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}
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res := make(map[string]*sql.Stmt, len(stmts))
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for key, stmt := range stmts {
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prep, err := db.Prepare(stmt)
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if err != nil {
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log.Println("Failed to compile", stmt)
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return nil, err
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}
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res[key] = prep
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}
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return res, nil
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}
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