fts3

目标：windows下让pyqt测试程序支持sqlite3 icu fts3/4的 全文搜索 功能。 环境： windows XP pyqt 安装文件 PyQt-Py2.7-x86-gpl-4.9.6-1.exe pyqt 源码包 PyQt-win-gpl-4.9.4.zip python 版本2.7 qt是官方下载的 4.8.4 EXE 安装包 难点： 一般自己的 测试程序 提示“no such module: fts4”错误，可以按照 网上《 Qt SQLite / SQLCipher driver plugin with ICU 》 一文的如下说明就能得到支持icu fts3/4的qt sqlite3 plugins： In order to make ICU work with the default SQLite driver plugin, you have to modify the .pro file, add the following lines DEFINES += SQLITE_ENABLE_ICU INCLUDEPATH += "Path/To/icu/include" LIBS += -L"Path/To/icu/lib" -licuuc -licuin and rebuild your SQLite driver plugin. 据此，我在$QT/4

I already have an application that uses the SQLite database and a listadapter. I am trying to update my application to use the Full Text Search capabilities but am struggling to find an answer to a problem. Basically when I create the virtual table with the necessary _id column, the database converts it to a text field and it is no longer an autoincrement primary key. How would I go about using the FTS3 capabilities with a listadapter? When using FTS3 sqlite ignores datatypes and constraints. So all columns get created as text. In place of the _ID column, it creates a docid also known as a

I have table with almost 200k entries. When I tried search with LIKE, it was very slow. Now I decided to use FTS. So I created two indexes where search will be held. Then I created fts virtual table. `CREATE TABLE [search_eng] ( [id] INTEGER PRIMARY KEY AUTOINCREMENT, [entry_id] INTEGER, [re_value] TEXT, [ke_value] TEXT, [g_value] TEXT); CREATE INDEX idx_se_re ON search_eng (re_value); CREATE INDEX idx_se_gv ON search_eng (g_value); CREATE VIRTUAL TABLE search_eng_fts USING fts3(id, entry_id, re_value, ke_value, g_value);` I have no idea how to use new created FTS table. So my questions is how

I'm writing a dictionary app and need to do the usual word suggesting while typing. LIKE somestring% is rather slow (~1300ms on a ~100k row table) so I've turned to FTS3. Problem is, I haven't found a sane way to search from the beginning of a string. Now I'm performing a query like SELECT word, offsets(entries) FROM entries WHERE word MATCH '"chicken *"'; , then parse the offsets string in code. Are there any better options? Yes , make sure to set the index on field word and use word >= 'chicken ' AND word < 'chicken z' instead of LIKE or MATCH or GLOB 来源： https://stackoverflow.com/questions

I am using SQLite FTS extension in my iOS application. It performs well but the problem is that it matches only string prefixes (or starts with keyword search). i.e. SELECT FROM tablename WHERE columnname MATCH 'searchterm*' works but SELECT FROM tablename WHERE columnname MATCH '*searchterm' or SELECT FROM tablename WHERE columnname MATCH '*searchterm*' does not. Is there any workaround for this or any way to use FTS to build a query similar to "LIKE '%searchterm%'" query. EDIT: As pointed out by Retterdesdialogs, storing the entire text in reverse order and running a prefix search on reverse

I have created an SQLite FTS3 table that I am using within the Android development platform ( target is 2.2 and minVersion is 8). For example, I created the table as follows: create virtual table person using fts3(first,last); I know that when I insert data into this table, I long is returned, which is the row ID of the record inserted. How do I get the row ID from this table? If I perform: select * from person I get -1 for Cursor.getColumnColumnIndex("rowid"); . Also, Cursor.getColumnNames() only shows the two columns ('first' and 'last') and not the 'rowid'. Any suggestikns on how to solve

Is there any way to search for a particular string in a column? I want to search like SELECT * from email_fts WHERE email_fts MATCH 'to:"a@b.com" OR from:"c@d.com"' Thanks in advance, Manoj Make sure you create proper FTS columns in the FTS index: CREATE VIRTUAL TABLE email_fts USING fts3(subject, body, "to", "from"); And then you can search individual FTS columns: SELECT rowid FROM email_fts WHERE "to" MATCH 'a@b.com' UNION SELECT rowid FROM email_fts WHERE "from" MATCH 'c@d.com' EDIT : My previous answer had an OR in the WHERE clause. Apparently sqlite doesn't support combining OR queries