ext/pgsql: pg_fetch_all_columns/pg_copy_to arrays optimisations. (php#18374)

changes to packed arrays for output userland values.

Author: devnexen

ext/pgsql/pgsql.c

@@ -2186,17 +2186,18 @@ PHP_FUNCTION(pg_fetch_all_columns)
 		RETURN_THROWS();
 	}
 
-	array_init(return_value);
-
 	if ((pg_numrows = PQntuples(pgsql_result)) <= 0) {
-		return;
+		RETURN_EMPTY_ARRAY();
 	}
 
+	array_init_size(return_value, pg_numrows);
+	zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
+
 	for (pg_row = 0; pg_row < pg_numrows; pg_row++) {
 		if (PQgetisnull(pgsql_result, pg_row, (int)colno)) {
-			add_next_index_null(return_value);
+			add_index_null(return_value, pg_row);
 		} else {
-			add_next_index_string(return_value, PQgetvalue(pgsql_result, pg_row, (int)colno));
+			add_index_string(return_value, pg_row, PQgetvalue(pgsql_result, pg_row, (int)colno));
 		}
 	}
 }
@@ -3363,6 +3364,7 @@ PHP_FUNCTION(pg_copy_to)
 
 				PQclear(pgsql_result);
 				array_init(return_value);
+				zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
 				while (!copydone)
 				{
 					int ret = PQgetCopyData(pgsql, &csv, 0);