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假設我有一個FTS [34]表data
和一個常規表info
,它們被info.ID = data.rowid
綁定在一起。我有一個視圖master
表示這個連接,我用它來查詢整體信息。 這裏是CREATE TABLE
聲明:SQLite查看功能?
CREATE VIRTUAL TABLE data USING fts4(
Name,
Keywords,
Aliases
Description);
CREATE TABLE info (
ID INTEGER PRIMARY KEY,
-- A bunch of other columns...
);
CREATE VIEW master AS SELECT
info.ID AS ID
data.Name AS Name,
data.Keywords AS Keywords,
data.Aliases AS Aliases,
data.Description AS Description,
-- A bunch of other columns...
FROM info JOIN data ON info.ID = data.rowid;
現在我想要做的就是創造另一種觀點認爲,由於對每列執行,而不是選擇從data
表整個小區,選擇SQLite的snippet函數的結果在data
表:
CREATE VIEW search AS SELECT
master.*,
snippet(data '<b>', '</b>', '...', 0) AS sn_Name,
snippet(data '<b>', '</b>', '...', 1) AS sn_Keywords,
snippet(data '<b>', '</b>', '...', 2) AS sn_Aliases,
snippet(data '<b>', '</b>', '...', 3) AS sn_Description
FROM master JOIN data ON master.ID = data.rowid;
然而,當我從內Python中執行該語句,我得到如下:
sqlite3.OperationalError: near "'<b>'": syntax error