110 lines
3.1 KiB
Lua
110 lines
3.1 KiB
Lua
---
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--- Created by mark.
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--- Desc: 演示对OpenResty中使用Lua对MySQL操作
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--- Note：本Lua脚本借鉴了网络，未经测试，仅供参考，也不提供任何技术支持
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---
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local function close_db(db)
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if not db then
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return
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end
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db:close()
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end
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local mysql = require("resty.mysql")
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local db, err = mysql:new()
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if not db then
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ngx.say("new mysql error : ", err)
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return
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end
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db:set_timeout(1000)
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local props = {
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host = "127.0.0.1",
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port = 3306,
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database = "mysql",
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user = "root",
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password = "123"
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}
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local res, err, errno, sqlstate = db:connect(props)
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if not res then
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ngx.say("connect to mysql error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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---------------------------------------
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-- 执行SQL语句范例
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local create_table_sql = "create table test(id int primary key auto_increment, ch varchar(100))"
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res, err, errno, sqlstate = db:query(create_table_sql)
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if not res then
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ngx.say("create table error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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local drop_table_sql = "drop table if exists test"
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res, err, errno, sqlstate = db:query(drop_table_sql)
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if not res then
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ngx.say("drop table error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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local insert_sql = "insert into test (ch) values('hello')"
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res, err, errno, sqlstate = db:query(insert_sql)
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if not res then
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ngx.say("insert error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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res, err, errno, sqlstate = db:query(insert_sql)
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ngx.say("insert rows : ", res.affected_rows, " , id : ", res.insert_id, "<br/>")
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local update_sql = "update test set ch = 'hello2' where id =" .. res.insert_id
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res, err, errno, sqlstate = db:query(update_sql)
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if not res then
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ngx.say("update error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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ngx.say("update rows : ", res.affected_rows, "<br/>")
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local select_sql = "select id, ch from test"
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res, err, errno, sqlstate = db:query(select_sql)
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if not res then
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ngx.say("select error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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for i, row in ipairs(res) do
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for name, value in pairs(row) do
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ngx.say("select row ", i, " : ", name, " = ", value, "<br/>")
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end
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end
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ngx.say("<br/>")
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local ch_param = ngx.req.get_uri_args()["ch"] or ''
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local query_sql = "select id, ch from test where ch = " .. ngx.quote_sql_str(ch_param)
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res, err, errno, sqlstate = db:query(query_sql)
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if not res then
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ngx.say("select error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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for i, row in ipairs(res) do
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for name, value in pairs(row) do
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ngx.say("select row ", i, " : ", name, " = ", value, "<br/>")
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end
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end
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local delete_sql = "delete from test"
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res, err, errno, sqlstate = db:query(delete_sql)
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if not res then
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ngx.say("delete error : ", err, " , errno : ", errno, " , sqlstate : ", sqlstate)
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return close_db(db)
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end
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ngx.say("delete rows : ", res.affected_rows, "<br/>")
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close_db(db) |