/*
 * testlibpq.c
 *
 * Test the C version of libpq++, the PostgreSQL frontend
 * library.
 *
 * NOTE: There us PgCursor class which makes more sense to use in this example
 * (See pgsql/include/libpq++/*.h for classes suported (not many)
 *
 */
#include <stdio.h>
#include <libpq++.h>
void
exit_nicely(PgDatabase &conn)
{
    conn.~PgDatabase();
    exit(1);
}
main()
{
    char       dbName[32];
    char       password[32];
    char       conninfo[128];

    int         nFields;
    int         i, j;
    int res;

    printf("database name: "); 
    scanf("%s", dbName);

    printf("password: ");
    scanf("%s", password);

    sprintf(conninfo, "host = marlowe dbname = %s user = %s password = %s",
	    dbName, dbName, password);

    /* make a connection to the database */

    PgDatabase conn(conninfo);


    /*
     * check to see that the backend connection was successfully made
     */
    if (conn.ConnectionBad())
      {
        fprintf(stderr, "Connection to database '%s' failed.\n", dbName);
        fprintf(stderr, "%s", conn.ErrorMessage());
        exit_nicely(conn);
      }

    /* debug = fopen("/tmp/trace.out","w"); */
    /* PQtrace(conn, debug);  */
    /* start a transaction block */
    res = conn.Exec("BEGIN");
    if (res != PGRES_COMMAND_OK) {
        fprintf(stderr, "BEGIN command failed\n");	
        exit_nicely(conn);
    }

    /*
     * fetch rows from the pg_database, the system catalog of
     * databases
     */

    res = conn.ExecCommandOk("DECLARE mycursor CURSOR FOR select * from pg_tables");    
    if (!res) {
      fprintf(stderr, "DECLARE CURSOR command failed\n");
      exit_nicely(conn);
    }
    
    res = conn.ExecTuplesOk("FETCH ALL in mycursor");
    if (!res) {
      fprintf(stderr, "FETCH ALL command didn't return tuples properly\n");
      exit_nicely(conn);
    }

    /* first, print out the attribute names */
    nFields = conn.Fields();
    printf("Number of fields: %d\n", nFields);

    for (i = 0; i < nFields; i++)
      printf("%-15s", conn.FieldName(i));
    printf("\n\n");

    /* next, print out the rows */
    for (i = 0; i < conn.Tuples(); i++) {
      for (j = 0; j < nFields; j++)
	printf("%-15s", conn.GetValue(i, j));
      printf("\n");
    }

    /* close the cursor */
    res = conn.Exec("CLOSE mycursor");

    /* commit the transaction */
    res = conn.Exec("COMMIT");

    /* close the connection to the database and cleanup */

    /* fclose(debug); */
    return 0;
}