     int main(int argc, char **argv)     {       EXEC SQL CONNECT TO :target AS connection_unix USER postgres;       /* Drop table */       EXEC SQL DROP TABLE IF EXISTS foo;       /* Create table foo */       EXEC SQL CREATE TABLE foo (id INTEGER, name TEXT);       EXEC SQL WHENEVER SQLERROR CALL print_sqlca();       EXEC SQL INSERT INTO foo VALUES (0, 0, 'foo0');       EXEC SQL COMMIT;       EXEC SQL DISCONNECT ALL;       return 0;     }  