From 917441e8c5ad8207b5acf8e80d6e44e12b668c9d Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Sat, 15 Apr 2017 20:44:11 +0200
Subject: [PATCH] Re-create sqlite table instead of using different schema

---
 daos/sqlite/Database.php | 45 ++++++++++++++++++++++++----------------
 1 file changed, 27 insertions(+), 18 deletions(-)

diff --git a/daos/sqlite/Database.php b/daos/sqlite/Database.php
index 3c116fc5dd..0557580606 100644
--- a/daos/sqlite/Database.php
+++ b/daos/sqlite/Database.php
@@ -57,9 +57,7 @@ public function __construct() {
                         uid         VARCHAR(255) NOT NULL,
                         link        TEXT NOT NULL,
                         updatetime  DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
-                        author      VARCHAR(255),
-                        shared      BOOL,
-                        lastseen    DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+                        author      VARCHAR(255)
                     );
                 ');
 
@@ -106,7 +104,7 @@ public function __construct() {
                 ');
 
                 \F3::get('db')->exec('
-                    INSERT INTO version (version) VALUES (11);
+                    INSERT INTO version (version) VALUES (8);
                 ');
 
                 \F3::get('db')->exec('
@@ -198,18 +196,29 @@ public function __construct() {
                 }
                 if (strnatcmp($version, '11') < 0) {
                     \F3::get('db')->exec([
-                        'DROP TRIGGER update_updatetime_trigger',
-                        'ALTER TABLE items ADD lastseen DATETIME',
-                        // Needs to be a trigger since SQLite does not allow adding fields with dynamic defaults.
-                        // https://marc.info/?l=sqlite-users&m=122283678813925
-                        'CREATE TRIGGER insert_lastseen_trigger
-                            AFTER INSERT ON items FOR EACH ROW
-                                BEGIN
-                                    UPDATE items
-                                    SET lastseen = CURRENT_TIMESTAMP
-                                    WHERE id = NEW.id;
-                                END',
-                        'UPDATE items SET lastseen = CURRENT_TIMESTAMP',
+                        // table needs to be re-created because ALTER TABLE is rather limited
+                        // https://sqlite.org/lang_altertable.html#otheralter
+                        'CREATE TABLE new_items (
+                            id          INTEGER PRIMARY KEY AUTOINCREMENT,
+                            datetime    DATETIME NOT NULL,
+                            title       TEXT NOT NULL,
+                            content     TEXT NOT NULL,
+                            thumbnail   TEXT,
+                            icon        TEXT,
+                            unread      BOOL NOT NULL,
+                            starred     BOOL NOT NULL,
+                            source      INT NOT NULL,
+                            uid         VARCHAR(255) NOT NULL,
+                            link        TEXT NOT NULL,
+                            updatetime  DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                            author      VARCHAR(255),
+                            shared      BOOL,
+                            lastseen    DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+                        )',
+                        'INSERT INTO new_items SELECT *, CURRENT_TIMESTAMP FROM items',
+                        'DROP TABLE items',
+                        'ALTER TABLE new_items RENAME TO items',
+                        'CREATE INDEX source ON items (source)',
                         'CREATE TRIGGER update_updatetime_trigger
                             AFTER UPDATE ON items FOR EACH ROW
                                 WHEN (
@@ -220,8 +229,8 @@ public function __construct() {
                                     UPDATE items
                                     SET updatetime = CURRENT_TIMESTAMP
                                     WHERE id = NEW.id;
-                                END;',
-                        'INSERT INTO version (version) VALUES (11);'
+                                END',
+                        'INSERT INTO version (version) VALUES (11)'
                     ]);
                 }
             }