src/interfaces/ecpg/test/sql/describe.pgc

#include <stdlib.h>
#include <string.h>

exec sql include ../regression;
exec sql include sqlda.h;

exec sql whenever sqlerror stop;

sqlda_t	*sqlda1, *sqlda2, *sqlda3;

int
main (void)
{
exec sql begin declare section;
	char	*stmt1 = "SELECT id, t FROM descr_t2";
	char	*stmt2 = "SELECT id, t FROM descr_t2 WHERE id = -1";
	int	i, count1, count2;
	char	field_name1[30] = "not set";
	char	field_name2[30] = "not set";
exec sql end declare section;

	char msg[128];

	ECPGdebug(1, stderr);

	strcpy(msg, "connect");
	exec sql connect to REGRESSDB1;

	strcpy(msg, "set");
	exec sql set datestyle to iso;

	strcpy(msg, "create");
	exec sql create table descr_t2(id serial primary key, t text);

	strcpy(msg, "insert");
	exec sql insert into descr_t2(id, t) values (default, 'a');
	exec sql insert into descr_t2(id, t) values (default, 'b');
	exec sql insert into descr_t2(id, t) values (default, 'c');
	exec sql insert into descr_t2(id, t) values (default, 'd');

	strcpy(msg, "commit");
	exec sql commit;

	/*
	 * Test DESCRIBE with a query producing tuples.
	 * DESCRIPTOR and SQL DESCRIPTOR are NOT the same in
	 * Informix-compat mode.
	 */

	strcpy(msg, "allocate");
	exec sql allocate descriptor desc1;
	exec sql allocate descriptor desc2;

	strcpy(msg, "prepare");
	exec sql prepare st_id1 FROM :stmt1;

	sqlda1 = sqlda2 = sqlda3 = NULL;

	strcpy(msg, "describe");
	exec sql describe st_id1 into sql descriptor desc1;
	exec sql describe st_id1 using sql descriptor desc2;

	exec sql describe st_id1 into descriptor sqlda1;
	exec sql describe st_id1 using descriptor sqlda2;
	exec sql describe st_id1 into sqlda3;

	if (sqlda1 == NULL)
	{
		printf("sqlda1 NULL\n");
		exit(1);
	}

	if (sqlda2 == NULL)
	{
		printf("sqlda2 NULL\n");
		exit(1);
	}

	if (sqlda3 == NULL)
	{
		printf("sqlda3 NULL\n");
		exit(1);
	}

	strcpy(msg, "get descriptor");
	exec sql get descriptor desc1 :count1 = count;
	exec sql get descriptor desc1 :count2 = count;

	if (count1 != count2)
	{
		printf("count1 (%d) != count2 (%d)\n", count1, count2);
		exit(1);
	}

	if (count1 != sqlda1->sqld)
	{
		printf("count1 (%d) != sqlda1->sqld (%d)\n", count1, sqlda1->sqld);
		exit(1);
	}

	if (count1 != sqlda2->sqld)
	{
		printf("count1 (%d) != sqlda2->sqld (%d)\n", count1, sqlda2->sqld);
		exit(1);
	}

	if (count1 != sqlda3->sqld)
	{
		printf("count1 (%d) != sqlda3->sqld (%d)\n", count1, sqlda3->sqld);
		exit(1);
	}

	for (i = 1; i <= count1; i++)
	{
		exec sql get descriptor desc1 value :i :field_name1 = name;
		exec sql get descriptor desc2 value :i :field_name2 = name;
		printf("%d\n\tfield_name1 '%s'\n\tfield_name2 '%s'\n\t"
			"sqlda1 '%s'\n\tsqlda2 '%s'\n\tsqlda3 '%s'\n",
			i, field_name1, field_name2,
			sqlda1->sqlvar[i-1].sqlname.data,
			sqlda2->sqlvar[i-1].sqlname.data,
			sqlda3->sqlvar[i-1].sqlname.data);
	}

	strcpy(msg, "deallocate");
	exec sql deallocate descriptor desc1;
	exec sql deallocate descriptor desc2;
	free(sqlda1);
	free(sqlda2);
	free(sqlda3);

	exec sql deallocate prepare st_id1;

	/* Test DESCRIBE with a query not producing tuples */

	strcpy(msg, "allocate");
	exec sql allocate descriptor desc1;
	exec sql allocate descriptor desc2;

	strcpy(msg, "prepare");
	exec sql prepare st_id2 FROM :stmt2;

	sqlda1 = sqlda2 = sqlda3 = NULL;

	strcpy(msg, "describe");
	exec sql describe st_id2 into sql descriptor desc1;
	exec sql describe st_id2 using sql descriptor desc2;

	exec sql describe st_id2 into descriptor sqlda1;
	exec sql describe st_id2 using descriptor sqlda2;
	exec sql describe st_id2 into sqlda3;

	if (sqlda1 == NULL || sqlda2 == NULL || sqlda3 == NULL)
		exit(1);

	strcpy(msg, "get descriptor");
	exec sql get descriptor desc1 :count1 = count;
	exec sql get descriptor desc1 :count2 = count;

	if (!(	count1 == count2 &&
		count1 == sqlda1->sqld &&
		count1 == sqlda2->sqld &&
		count1 == sqlda3->sqld))
		exit(1);

	for (i = 1; i <= count1; i++)
	{
		exec sql get descriptor desc1 value :i :field_name1 = name;
		exec sql get descriptor desc2 value :i :field_name2 = name;
		printf("%d\n\tfield_name1 '%s'\n\tfield_name2 '%s'\n\t"
			"sqlda1 '%s'\n\tsqlda2 '%s'\n\tsqlda3 '%s'\n",
			i, field_name1, field_name2,
			sqlda1->sqlvar[i-1].sqlname.data,
			sqlda2->sqlvar[i-1].sqlname.data,
			sqlda3->sqlvar[i-1].sqlname.data);
	}

	strcpy(msg, "deallocate");
	exec sql deallocate descriptor desc1;
	exec sql deallocate descriptor desc2;
	free(sqlda1);
	free(sqlda2);
	free(sqlda3);

	exec sql deallocate prepare st_id2;

	/* End test */

	strcpy(msg, "drop");
	exec sql drop table descr_t2;

	strcpy(msg, "commit");
	exec sql commit;

	strcpy(msg, "disconnect");
	exec sql disconnect;

	return 0;
}