Re: The connection to the server was lost. Attempting reset: Failed.

Thank you very much for the reply.
Well, really, resetStringInfo () is a function of the StringInfo data structure.
What I used at the end was initStringInfo, which is a function of the data structure StringInfoData, which is what I am using, although I don't know if they are equivalent.
The code remained as follows:
                       if (cols.len> 0)
                      {
                               initStringInfo (& cols);
                       } / * IF col.len> 0 * /
But it continues giving me the same error.

Best regards,

Yessica Brinkmann

El jue., 10 oct. 2019 a las 13:33, Yessica Brinkmann (<yessica.brinkmann@gmail.com>) escribió:

Thank you so much for your answer. I will be testing the indicated and then I give you return.
Best regards,

Yessica Brinkmann

El jue., 10 oct. 2019 a las 13:14, Tom Lane (<tgl@sss.pgh.pa.us>) escribió:

Yessica Brinkmann <yessica.brinkmann@gmail.com> writes:
> I really thought a lot, but I don't understand why but the function fails
> after the expression is executed:
> appendStringInfo (& cols, "% s a.attnum =% d", (i> 0? "OR": ""), idxcd->
> varattno [i]);

I think you're probably shooting yourself in the foot here:

            /* pfree() the memory allocated for the previous candidate. FIXME: Avoid
            * meddling with the internals of a StringInfo, and try to use an API.
            */
            if( cols.len > 0 )
            {
                pfree( cols.data );
                cols.data = NULL;
            } /*IF col.len>0*/

Don't do that, use resetStringInfo() instead.

                        regards, tom lane