From 39f110f82cfe19711851d6adaf573a752213484c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20=C4=8Ciha=C5=99?= <michal@cihar.com>
Date: Wed, 10 Mar 2004 11:01:50 +0000
Subject: [PATCH] Support for unbuffered queries - PMA_DBI_QUERY_UNBUFFERED and
 fix support of PMA_DBI_QUERY_STORE.

---
 libraries/database_interface.lib.php | 3 ++-
 libraries/dbi/mysql.dbi.lib.php      | 8 +++++++-
 libraries/dbi/mysqli.dbi.lib.php     | 4 +++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/libraries/database_interface.lib.php b/libraries/database_interface.lib.php
index 332a988c7..b0a78e7e2 100644
--- a/libraries/database_interface.lib.php
+++ b/libraries/database_interface.lib.php
@@ -5,7 +5,8 @@
 /**
  * Common Option Constants For DBI Functions
  */
-define('PMA_DBI_QUERY_STORE', 1);  // Force STORE_RESULT method, ignored by classic MySQL.
+define('PMA_DBI_QUERY_STORE',       1);  // Force STORE_RESULT method, ignored by classic MySQL.
+define('PMA_DBI_QUERY_UNBUFFERED',  2);  // Do not read whole query
 
 /**
  * Including The DBI Plugin
diff --git a/libraries/dbi/mysql.dbi.lib.php b/libraries/dbi/mysql.dbi.lib.php
index f1b003bff..b44bb3bd3 100644
--- a/libraries/dbi/mysql.dbi.lib.php
+++ b/libraries/dbi/mysql.dbi.lib.php
@@ -119,7 +119,13 @@ function PMA_DBI_try_query($query, $link = NULL, $options = 0) {
     if (PMA_MYSQL_INT_VERSION < 40100) {
         $query = PMA_convert_charset($query);
     }
-    return mysql_query($query, $link);
+    if ($options == ($options | PMA_DBI_QUERY_STORE)) {
+        return mysql_query($query, $link);
+    } elseif ($options == ($options | PMA_DBI_QUERY_UNBUFFERED)) {
+        return mysql_unbuffered_query($query, $link);
+    } else {
+        return mysql_query($query, $link);
+    }
 }
 
 // The following function is meant for internal use only.
diff --git a/libraries/dbi/mysqli.dbi.lib.php b/libraries/dbi/mysqli.dbi.lib.php
index 050cfe0bf..61b902684 100644
--- a/libraries/dbi/mysqli.dbi.lib.php
+++ b/libraries/dbi/mysqli.dbi.lib.php
@@ -92,8 +92,10 @@ function PMA_DBI_select_db($dbname, $link = NULL) {
 }
 
 function PMA_DBI_try_query($query, $link = NULL, $options = 0) {
-    if ($options == $options | PMA_DBI_QUERY_STORE) {
+    if ($options == ($options | PMA_DBI_QUERY_STORE)) {
         $method = MYSQLI_STORE_RESULT;
+    } elseif ($options == ($options | PMA_DBI_QUERY_UNBUFFERED)) {
+        $method = MYSQLI_USE_RESULT;
     } else {
         $method = MYSQLI_USE_RESULT;
     }