From 738d89a51cb42bd8b23041b4ea09971bbba0fde7 Mon Sep 17 00:00:00 2001 From: zgx <2821644377@qq.com> Date: Mon, 19 May 2025 23:26:13 +0800 Subject: [PATCH] 1 --- src/net/micode/notes/data/Contact.java | 41 +++- .../notes/data/NotesDatabaseHelper.java | 212 +++++++++++------- 2 files changed, 163 insertions(+), 90 deletions(-) diff --git a/src/net/micode/notes/data/Contact.java b/src/net/micode/notes/data/Contact.java index 805f6cd..346591e 100644 --- a/src/net/micode/notes/data/Contact.java +++ b/src/net/micode/notes/data/Contact.java @@ -16,7 +16,7 @@ package net.micode.notes.data;//导入包 -import android.content.Context; +import android.content.Context;// import android.database.Cursor; import android.provider.ContactsContract.CommonDataKinds.Phone; import android.provider.ContactsContract.Data; @@ -24,19 +24,32 @@ import android.telephony.PhoneNumberUtils; import android.util.Log; import java.util.HashMap; - +/** + * 联系人工具类，用于根据电话号码查询联系人名称，并带有缓存机制 + */ public class Contact { + // 静态缓存，用于存储电话号码与对应联系人名称的映射关系，避免重复查询数据库 private static HashMap sContactCache; + // 日志标签 private static final String TAG = "Contact"; - + // 查询条件模板： + // 1. 使用PHONE_NUMBERS_EQUAL比较电话号码（考虑格式差异） + // 2. 数据类型为电话条目 + // 3. 限制raw_contact_id必须在phone_lookup表中匹配指定最小匹配长度的记录 private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'" + " AND " + Data.RAW_CONTACT_ID + " IN " + "(SELECT raw_contact_id " + " FROM phone_lookup" + " WHERE min_match = '+')"; - + /** + * 根据电话号码查询联系人名称 + * @param context 上下文对象，用于访问内容解析器 + * @param phoneNumber 要查询的电话号码 + * @return 联系人名称，如果未找到或出错则返回null + */ public static String getContact(Context context, String phoneNumber) { + // 初始化缓存 if(sContactCache == null) { sContactCache = new HashMap(); } @@ -44,26 +57,30 @@ public class Contact { if(sContactCache.containsKey(phoneNumber)) { return sContactCache.get(phoneNumber); } - + // 优先从缓存中获取 String selection = CALLER_ID_SELECTION.replace("+", + // 构造完整查询条件：替换最小匹配长度参数 PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); + // 通过内容解析器查询联系人数据库 Cursor cursor = context.getContentResolver().query( - Data.CONTENT_URI, - new String [] { Phone.DISPLAY_NAME }, - selection, - new String[] { phoneNumber }, - null); - + Data.CONTENT_URI,// 访问组合联系人数据 + new String [] { Phone.DISPLAY_NAME },// 查询显示名字段 + selection,// 动态生成的查询条件 + new String[] { phoneNumber },// 查询参数（原始电话号码） + null);// 排序方式（无） + // 处理查询结果 if (cursor != null && cursor.moveToFirst()) { try { + // 获取第一条记录的显示名称 String name = cursor.getString(0); + // 更新缓存 sContactCache.put(phoneNumber, name); return name; } catch (IndexOutOfBoundsException e) { Log.e(TAG, " Cursor get string error " + e.toString()); return null; } finally { - cursor.close(); + cursor.close();// 确保关闭Cursor释放资源 } } else { Log.d(TAG, "No contact matched with number:" + phoneNumber); diff --git a/src/net/micode/notes/data/NotesDatabaseHelper.java b/src/net/micode/notes/data/NotesDatabaseHelper.java index 93afb00..9ad6333 100644 --- a/src/net/micode/notes/data/NotesDatabaseHelper.java +++ b/src/net/micode/notes/data/NotesDatabaseHelper.java @@ -25,63 +25,69 @@ import android.util.Log; import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.NoteColumns; - +/** + * 笔记数据库帮助类，负责数据库的创建、升级以及表结构管理 + * 采用单例模式确保全局唯一数据库实例 + */ public class NotesDatabaseHelper extends SQLiteOpenHelper { - private static final String DB_NAME = "note.db"; - - private static final int DB_VERSION = 4; + // 数据库元数据配置 + private static final String DB_NAME = "note.db";// 数据库文件名 + private static final int DB_VERSION = 4;// 当前数据库版本 + // 表名常量接口 public interface TABLE { - public static final String NOTE = "note"; + public static final String NOTE = "note";// 主表：存储笔记元信息（标题、创建时间、父目录等） - public static final String DATA = "data"; + public static final String DATA = "data";// 数据表：存储笔记具体内容及扩展数据 } - private static final String TAG = "NotesDatabaseHelper"; - - private static NotesDatabaseHelper mInstance; + private static final String TAG = "NotesDatabaseHelper";// 日志标签 + private static NotesDatabaseHelper mInstance; // 单例实例 + // Note表建表语句 private static final String CREATE_NOTE_TABLE_SQL = "CREATE TABLE " + TABLE.NOTE + "(" + - NoteColumns.ID + " INTEGER PRIMARY KEY," + - NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + + NoteColumns.ID + " INTEGER PRIMARY KEY," +// 笔记唯一标识 + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +// 所属文件夹ID（树形结构） + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +// 提醒时间（毫秒时间戳） + NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +// 背景颜色标识 NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + - NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + - NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + - NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +// 是否有附件（0/1布尔值） + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +// 最后修改时间 + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 子项数量（用于文件夹） + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +// 内容摘要 + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 笔记类型（普通笔记、文件夹等） + NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +// 关联的小部件ID + NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +// 小部件类型 + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +// 同步标识 + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +// 本地修改标记 + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +// 原始父目录（用于同步） + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +// Google Task关联ID + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 数据版本号（乐观锁） ")"; - +// Data表建表语句 private static final String CREATE_DATA_TABLE_SQL = "CREATE TABLE " + TABLE.DATA + "(" + - DataColumns.ID + " INTEGER PRIMARY KEY," + - DataColumns.MIME_TYPE + " TEXT NOT NULL," + - DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + - DataColumns.DATA1 + " INTEGER," + - DataColumns.DATA2 + " INTEGER," + - DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + - DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + - DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + + DataColumns.ID + " INTEGER PRIMARY KEY," +// 数据项唯一标识 + DataColumns.MIME_TYPE + " TEXT NOT NULL," +// MIME类型（文本、清单、媒体等） + DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 关联的笔记ID + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +// 同步创建时间 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +// 同步修改时间 + DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +// 主要内容存储 + DataColumns.DATA1 + " INTEGER," +// 扩展字段1（类型相关数据） + DataColumns.DATA2 + " INTEGER," +// 扩展字段2（如清单项状态） + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +// 扩展字段3（如地理位置） + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +// 扩展字段4（如附件路径） + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +// 扩展字段5（保留字段） ")"; - +// 数据表索引：加速按笔记ID查询数据项 private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = "CREATE INDEX IF NOT EXISTS note_id_index ON " + TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; + // 触发器：当更新笔记的父目录时，增加新文件夹的计数 + // 场景示例：把笔记A从文件夹X移动到文件夹Y时，Y的计数+1 /** * Increase folder's note count when move note to the folder */ @@ -93,7 +99,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " END"; - +// 触发器：当更新笔记的父目录时，减少原文件夹的计数 + // 场景示例：同上移动操作时，X的计数-1（需>0时生效） /** * Decrease folder's note count when move note from folder */ @@ -106,7 +113,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + " END"; - +// 触发器：插入新笔记时增加所在文件夹的计数 /** * Increase folder's note count when insert new note to the folder */ @@ -118,7 +125,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " END"; - + // 触发器：删除笔记时减少原文件夹的计数（防止负数） /** * Decrease folder's note count when delete note from the folder */ @@ -131,33 +138,42 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + " AND " + NoteColumns.NOTES_COUNT + ">0;" + " END"; - +/** + * 插入NOTE类型数据时自动更新笔记摘要 + * 场景：当在data表插入类型为普通笔记的数据时，自动更新note表的snippet字段 + */ /** * Update note's content when insert data with type {@link DataConstants#NOTE} */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = "CREATE TRIGGER update_note_content_on_insert " + " AFTER INSERT ON " + TABLE.DATA + - " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + + " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +// 仅处理普通笔记类型 " BEGIN" + " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + - " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +// 使用新插入的内容更新摘要 + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +// 通过NOTE_ID关联 " END"; - + /** + * 更新NOTE类型数据时同步更新笔记摘要 + * 场景：修改已有笔记内容时（如编辑文本），自动更新对应笔记摘要 + */ /** * Update note's content when data with {@link DataConstants#NOTE} type has changed */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = "CREATE TRIGGER update_note_content_on_update " + " AFTER UPDATE ON " + TABLE.DATA + - " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + + " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +// 仅处理原类型为笔记的记录 " BEGIN" + " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +// 同步最新内容到摘要 " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " END"; - +/** + * 删除NOTE类型数据时清空笔记摘要 + * 场景：当删除笔记的正文数据时，自动清空对应笔记的摘要 + */ /** * Update note's content when data with {@link DataConstants#NOTE} type has deleted */ @@ -167,10 +183,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + " BEGIN" + " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.SNIPPET + "=''" + + " SET " + NoteColumns.SNIPPET + "=''" +// 清空摘要内容 " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + " END"; - +/** + * 笔记级联删除触发器 + * 场景：当删除note表的记录时，自动删除关联的data表数据 + * 作用：防止产生孤儿数据（没有对应笔记的数据项） + */ /** * Delete datas belong to note which has been deleted */ @@ -179,9 +199,13 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " AFTER DELETE ON " + TABLE.NOTE + " BEGIN" + " DELETE FROM " + TABLE.DATA + - " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + + " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +// 根据被删除笔记ID清理数据 " END"; - + /** + * 文件夹级联删除触发器 + * 场景：当删除文件夹时，自动删除其下所有笔记 + * 注意：会触发delete_data_on_delete触发器进行二次清理 + */ /** * Delete notes belong to folder which has been deleted */ @@ -190,22 +214,33 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " AFTER DELETE ON " + TABLE.NOTE + " BEGIN" + " DELETE FROM " + TABLE.NOTE + - " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +// 删除所有父目录为被删文件夹的笔记 " END"; - + /** + * 文件夹移动至回收站操作触发器 + * 场景：当文件夹被移动到回收站时，自动将其子项也移动到回收站 + * 设计目的：保持文件夹结构的完整性 + */ /** * Move notes belong to folder which has been moved to trash folder */ private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = "CREATE TRIGGER folder_move_notes_on_trash " + " AFTER UPDATE ON " + TABLE.NOTE + - " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + + " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +// 检测是否移动到回收站 " BEGIN" + " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + - " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + + " SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +// 批量更新子项父目录为回收站 + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + // 选择原父目录下的所有笔记 " END"; - + /** + * 初始化系统文件夹（首次创建数据库时调用） + * 插入预定义的系统文件夹： + * 1. 通话记录文件夹（ID_CALL_RECORD_FOLDER） + * 2. 根文件夹（ID_ROOT_FOLDER） + * 3. 临时文件夹（ID_TEMPARAY_FOLDER） + * 4. 回收站（ID_TRASH_FOLER） + */ public NotesDatabaseHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); } @@ -237,14 +272,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { private void createSystemFolder(SQLiteDatabase db) { ContentValues values = new ContentValues(); - + // 插入通话记录文件夹 /** * call record foler for call notes */ values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); - values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); + values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);// 标记为系统文件夹 db.insert(TABLE.NOTE, null, values); - + // 插入根文件夹（默认笔记存储位置） /** * root folder which is default folder */ @@ -252,7 +287,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - + // 插入临时文件夹（用于笔记移动操作时的暂存区） /** * temporary folder which is used for moving note */ @@ -260,7 +295,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - + // 插入回收站（软删除数据存储位置） /** * create trash folder */ @@ -293,7 +328,13 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { } return mInstance; } - + /** + * 数据库版本升级控制中心 + * 升级策略： + * V1 → V2：完全重建表结构（破坏性升级） + * V2 → V3：添加Google Task支持 + 创建回收站 + * V3 → V4：添加版本控制字段 + */ @Override public void onCreate(SQLiteDatabase db) { createNoteTable(db); @@ -304,57 +345,72 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { boolean reCreateTriggers = false; boolean skipV2 = false; - +// V1到V2升级策略：完全重建表结构 if (oldVersion == 1) { upgradeToV2(db); - skipV2 = true; // this upgrade including the upgrade from v2 to v3 + skipV2 = true; // this upgrade including the upgrade from v2 to v3// 包含V2到V3的升级逻辑 oldVersion++; } - + // V2到V3升级策略：非破坏性升级 if (oldVersion == 2 && !skipV2) { upgradeToV3(db); - reCreateTriggers = true; + reCreateTriggers = true;// 需要重建触发器 oldVersion++; } - + // V3到V4升级策略：添加版本字段 if (oldVersion == 3) { upgradeToV4(db); oldVersion++; } - +// 重建触发器（当表结构变化可能影响触发器时） if (reCreateTriggers) { reCreateNoteTableTriggers(db); reCreateDataTableTriggers(db); } - +// 版本检查容错 if (oldVersion != newVersion) { throw new IllegalStateException("Upgrade notes database to version " + newVersion + "fails"); } } - +/** + * 升级到V2版本（破坏性升级） + * 操作说明： + * 1. 删除旧表 + * 2. 重建表结构 + * 3. 初始化系统文件夹 + */ private void upgradeToV2(SQLiteDatabase db) { db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); createNoteTable(db); createDataTable(db); } - + /** + * 升级到V3版本（功能增强） + * 主要变更： + * 1. 移除过期的修改时间触发器 + * 2. 新增GTASK_ID字段（用于Google Tasks同步） + * 3. 初始化回收站文件夹 + */ private void upgradeToV3(SQLiteDatabase db) { - // drop unused triggers + // drop unused triggers// 移除旧版的时间更新触发器 db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert"); db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update"); - // add a column for gtask id + // add a column for gtask id// 添加Google Task关联字段 db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''"); - // add a trash system folder + // add a trash system folder// 插入回收站系统文件夹 ContentValues values = new ContentValues(); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); } - +/** + * 升级到V4版本（数据版本控制） + * 新增字段：VERSION（用于实现乐观锁机制） + */ private void upgradeToV4(SQLiteDatabase db) { db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0");