more compatible SQL, error messages

tests/test_gh_62.phpt

@@ -13,11 +13,17 @@ $table = "EMPTY_NVARCHAR";
 $drop = "DROP TABLE $table";
 $res = @db2_exec($conn, $drop);
 /* ensure that SQL_NTS is used so empty strings work for not just VARCHAR */
-$create = "CREATE OR REPLACE TABLE $table (TEXTME NVARCHAR(1024))"; /* CCSID 1200? */
+$create = "CREATE TABLE $table (TEXTME NVARCHAR(1024))"; /* CCSID 1200? */
 $res = db2_exec($conn, $create);
+if ($res == false) {
+	die("Failed to create table: " . db2_stmt_error($create) . " - " . db2_stmt_errormsg($create) . "\n");
+}
 $insert = "INSERT INTO $table (TEXTME) VALUES (?)";
 $sth = db2_prepare($conn, $insert);
 $res = db2_execute($sth, array($input));
+if ($res == false) {
+	die("Failed to insert: " . db2_stmt_error($insert) . " - " . db2_stmt_errormsg($insert) . "\n");
+}
 $look = "select TEXTME from $table";
 $res = db2_exec($conn, $look);
 $row = db2_fetch_array($res);