Hi Esteban,
Your problem looks familiar to me,
and it seems you did not follow my advice.
Anyway, here is a C sample program which works.
It has nothing to do with wrong types, but with a
missing connection, but see for yourself.
/*
/opt/pgsql/bin/ecpg -o sampleprog01.c sampleprog01.sql
the compile command is for HP-UX - you have to adapt it for your machine
cc -Aa +w1 -g -I/opt/pgsql/include/ -L/opt/pgsql/lib/ sampleprog01.c -Wl,-a,archive
-lecpg -lpq -o sampleprog01
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "libpq-fe.h"
exec sql include sqlca;
void main()
{
EXEC SQL BEGIN DECLARE SECTION;
char *dbName;
VARCHAR tabla[50];
EXEC SQL END DECLARE SECTION;
int nrows;
dbName = "template1";
EXEC SQL CONNECT TO :dbName ;
printf("sqlca.sqlcode = %d \n", sqlca.sqlcode) ;
EXEC SQL BEGIN ;
EXEC SQL DECLARE T99 CURSOR FOR select relname from pg_class ;
EXEC SQL OPEN T99;
for(nrows = 0;; nrows++) {
EXEC SQL FETCH IN T99 INTO :tabla;
if ( sqlca.sqlcode != 0 )
break;
printf("%.*s \n", tabla.len, tabla.arr );
}
printf("nrows = %d ; sqlca.sqlcode = %d \n", nrows, sqlca.sqlcode) ;
EXEC SQL CLOSE T99;
EXEC SQL END ;
EXEC SQL DISCONNECT ;
}
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