postgresql – libpq,带参数插入

我想知道我是否可以使用libpq直接从C/C++进行参数化查询,而不是使用字符串,如果这样的代码看起来怎么样？

string tblins = "";
tblins = "INSERT INTO " + commtable + " "
         "(vdoc,bdoc,mytime,txml) VALUES ("
         "'" + cxml.vdoc + "',"
             + cxml.bdoc + "," //integer
         "'" + cxml.mytime + "',"
         "'" + cxml.txml + "')";

result = PQexec(conn,tblins.c_str());

谢谢.

解决方法

是的,您可以使用PQexecParams函数,如 in the documentation所述.

If parameters are used,they are referred to in the command string as $1,$2,etc. nParams is the number of parameters supplied; it is the length of the arrays paramTypes[],paramValues[],paramLengths[],and paramFormats[].