问题描述
，这似乎是Lua中大多数SQL数据库系统的规范库，不在查询中似乎没有任何引用/转义值的功能。我正在编写一个使用SQLite作为后端的应用程序，我很乐意使用一个如：
c.execute（'select * from stocks其中symbol =？'，t）
conn：execute（select * from stocks where symbols =+ luasql.sqlite.quote（t））$ b $有没有其他的Lua库支持引用SQLite？ （似乎没有。）还是我缺少关于LuaSQL的内容？我担心滚动自己的解决方案（用正则表达式或某些东西），并且错误。我应该写一个的包装器吗？解决方案我没有看过LuaSQL一段时间，但上次我检查它不支持它。我使用Lua-Sqlite3。
require（sqlite3）
db = sqlite3.open_memory ）
db：exec [[CREATE TABLE tbl（first_name TEXT，last_name TEXT）; ]]
stmt = db：prepare [[INSERT INTO tbl（first_name，last_name））VALUES（：first_name，：last_name）]]
stmt：bind（{first_name = hawkeye，last_name =pierce}）：exec（）
stmt：bind（{first_name =henry，last_name =blake}）：exec（）
r in db：rows（SELECT * FROM tbl）do
print（r.first_name，r.last_name）
end
LuaSQL, which seems to be the canonical library for most SQL database systems in Lua, doesn't seem to have any facilities for quoting/escaping values in queries. I'm writing an application that uses SQLite as a backend, and I'd love to use an interface like the one specified by Python's DB-API:
c.execute('select * from stocks where symbol=?', t)
but I'd even settle for something even dumber, like:
conn:execute("select * from stocks where symbol=" + luasql.sqlite.quote(t))
Are there any other Lua libraries that support quoting for SQLite? (LuaSQLite3 doesn't seem to.) Or am I missing something about LuaSQL? I'm worried about rolling my own solution (with regexes or something) and getting it wrong. Should I just write a wrapper for sqlite3_snprintf?
解决方案 I haven't looked at LuaSQL in a while but last time I checked it didn't support it. I use Lua-Sqlite3.
require("sqlite3")
db = sqlite3.open_memory()
db:exec[[ CREATE TABLE tbl( first_name TEXT, last_name TEXT ); ]]
stmt = db:prepare[[ INSERT INTO tbl(first_name, last_name) VALUES(:first_name, :last_name) ]]
stmt:bind({first_name="hawkeye", last_name="pierce"}):exec()
stmt:bind({first_name="henry", last_name="blake"}):exec()
for r in db:rows("SELECT * FROM tbl") do
print(r.first_name,r.last_name)
end
这篇关于如何引用LuaSQL的值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！