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Changes for page 01 Lua Functions

Last modified by Theodore Xu on 2023/10/26 10:51
From version 5.32
edited by Stone Wu
on 2022/07/12 10:47
Change comment: There is no comment for this version
To version 5.37
edited by Stone Wu
on 2022/07/12 11:05
Change comment: (Autosaved)

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... ... @@ -1839,6 +1839,7 @@
1839 1839  == **normal_getdata_byname(string name)** ==
1840 1840  
1841 1841  
1842 +
1842 1842  **Function:** Read the data of the monitoring point name
1843 1843  
1844 1844  **Parameter:**
... ... @@ -1853,4 +1853,194 @@
1853 1853  
1854 1854  = **11 MySQL database operation** =
1855 1855  
1856 -
1857 +== **luaMySql.init(string sourcename, string username, string password, string host, number port, string character)** ==
1858 +
1859 +**Function:** Configure database connection parameters
1860 +
1861 +**Parameter:**
1862 +
1863 +sourcename: the name of database
1864 +
1865 +username: the username of the connection
1866 +
1867 +password: the password of the connection
1868 +
1869 +host: the host name of the connection
1870 +
1871 +port: the host port of the connection
1872 +
1873 +character: the character set of the connection
1874 +
1875 +**Return:**
1876 +
1877 +Succeed: string
1878 +
1879 +Failed: multi
1880 +
1881 +== **luaMySql.exec(string statement)** ==
1882 +
1883 +**Function:** Execute the given SQL statement without returning the result set (add, delete, change)
1884 +
1885 +**Parameter:**
1886 +
1887 +statement: the given SQL statement
1888 +
1889 +**Return:**
1890 +
1891 +Succeed: status: returns the number of rows affected by SQL statement execution.
1892 +
1893 +Failed: mil, errorString
1894 +
1895 +== **luaMySql.execWithResult(string statement)** ==
1896 +
1897 +**Function:** Execute the given SQL statement returning the result set (check)
1898 +
1899 +**Parameter:**
1900 +
1901 +statement: the given SQL statement
1902 +
1903 +**Return:**
1904 +
1905 +Succeed: table: returns the result set
1906 +
1907 +Failed: mil, errorString
1908 +
1909 +For example:
1910 +
1911 +{{code language="LUA"}}
1912 +mysql = require"mysqlclient"
1913 +
1914 +function DataInitRight()
1915 +
1916 +local dbName = "db_lua1"
1917 +
1918 +local user = "root"
1919 +
1920 +local pwd = "123456"
1921 +
1922 +local host = "192.168.56.186"
1923 +
1924 +local port = 3306
1925 +local character = "UTF8"
1926 +
1927 +mysql.init(dbName, user, pwd, host, port, character)
1928 +
1929 +end
1930 +
1931 +function ExecFunc()
1932 +
1933 +status, errorString = mysql.exec("delete from tb_lua1 where mykey =
1934 +
1935 +10;")
1936 +
1937 +if nil == status then
1938 +
1939 +print("ExecFunc() error:", errorString)
1940 +
1941 +return -1
1942 +
1943 +else
1944 +
1945 +print("the number of rows affected by the command:", status)
1946 +
1947 +end
1948 +
1949 +return 0
1950 +
1951 +end
1952 +
1953 +function ExecWithResultFunc()
1954 +
1955 +status, errorString = mysql.execWithResult("select * from tb_lua1;")
1956 +
1957 +if nil == status then
1958 +
1959 +print("ExecWithResultFunc() error:", errorString)
1960 +
1961 +return -1
1962 +
1963 +else
1964 +
1965 +print("ExecWithResultFunc()
1966 +
1967 +success
1968 +
1969 +: status
1970 +
1971 +type
1972 +
1973 +=
1974 +
1975 +",
1976 +
1977 +type(status))
1978 +
1979 +print("ExecWithResultFunc() success : status len = ", #status)
1980 +
1981 +local num = #status
1982 +
1983 +local i = 1
1984 +
1985 +if num > 0 then
1986 +
1987 +for i = 1, num, 1 do
1988 +
1989 +local var = string.format("select result[%d] :mykey = %d,
1990 +
1991 +value = %s", i, status[i].mykey, status[i].value)
1992 +
1993 +print(var)
1994 +
1995 +end
1996 +
1997 +end
1998 +
1999 +print("---------------")
2000 +
2001 +end
2002 +
2003 +return 0
2004 +end
2005 +
2006 +function luaMysql_apiTest.main()
2007 +
2008 +print("script running ...")
2009 +
2010 +DataInitRight()
2011 +
2012 +--use exec demo
2013 +
2014 +if ExecFunc() < 0 then
2015 +
2016 +return
2017 +
2018 +end
2019 +
2020 +--use execWithResult demo
2021 +
2022 +if ExecWithResultFunc() < 0 then
2023 +
2024 +return
2025 +
2026 +end
2027 +
2028 +print("script running success")
2029 +
2030 +end
2031 +{{/code}}
2032 +
2033 += **12 Message ssummary algorithm** =
2034 +
2035 +== **hmac(string hash_func, string key, string message)** ==
2036 +
2037 +**Function:** Execute the given SQL statement returning the result set (check)
2038 +
2039 +**Parameter:**
2040 +
2041 +statement: the given SQL statement
2042 +
2043 +**Return:**
2044 +
2045 +Succeed: table: returns the result set
2046 +
2047 +Failed: mil, errorString