aravind chandu <[EMAIL PROTECTED]> writes:
>             I am
> using this pqxx library for postgresql to run programs.The following is
> the query which i gave to store the data,here data.speed,data.heading
> are float values and data.ttime is timestamp .If i try to run this
> statement I end up with an error below this query.Please help me to
> solve this problem.

>  result R1(T1.exec("insert into saveodtdata values( "+data.speed+" ,  
> "+data.heading+" , '" +data.ttime+" ' )" ));

>  invalid operands of types `const char[33]' and `float' to binary 
> `operator+'make: *** [main2.o] Error 1

You seem to be trying to feed some non-C code to a C compiler.
There's not enough detail here to say what you should be doing instead.

                        regards, tom lane

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