Merge pull request #133 from PostgreSQL-For-Wordpress/hotfix/handle-zero-int-addition-casting

cast numbers explictly as ints rather than adding 0 to them

Author: mattbucci

pg4wp/rewriters/SelectSQLRewriter.php

@@ -46,6 +46,12 @@ public function rewrite(): string
 
         $sql = $this->ensureOrderByInSelect($sql);
 
+        // Handle +0 casting in order by
+        // Regular expression to match the "ORDER BY" pattern
+        $pattern = '/ORDER BY\s+([a-zA-Z0-9_]+)\.meta_value\s*\+\s*0/i';
+        $replacement = 'ORDER BY CAST($1.meta_value AS SIGNED)';
+        $sql = preg_replace($pattern, $replacement, $sql);
+
         // Convert CONVERT to CAST
         $pattern = '/CONVERT\(([^()]*(\(((?>[^()]+)|(?-2))*\))?[^()]*),\s*([^\s]+)\)/x';
         $sql = preg_replace($pattern, 'CAST($1 AS $4)', $sql);
@@ -120,6 +126,8 @@ public function rewrite(): string
         $pattern = '/@@SESSION.sql_mode/';
         $sql = preg_replace($pattern, "''", $sql);
 
+
+        // TODO: this seems wrong but if we remove it we get failures with XYZ is not part of the group By
         if(isset($wpdb)) {
             $sql = str_replace('GROUP BY ' . $wpdb->prefix . 'posts.ID', '', $sql);
         }

tests/rewriteTest.php

@@ -710,6 +710,40 @@ public function test_it_rewrites_mediumints()
         $this->assertSame(trim($expected), trim($postgresql));
     }
 
+    public function test_it_rewrites_0CASTS() 
+    {
+
+        $sql = <<<SQL
+            SELECT   wp_posts.* FROM wp_posts  INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )
+            WHERE 1=1  AND ( 
+                wp_posts.post_date > '2024-07-17 23:59:59'
+            ) AND ( 
+                wp_postmeta.meta_key = 'make_feature_post'
+            ) AND (
+                (wp_posts.post_type = 'announcement' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'acf-disabled' OR wp_posts.post_status = 'private'))
+            )
+            GROUP BY wp_posts.ID
+            ORDER BY wp_postmeta.meta_value+0 DESC, wp_posts.post_date DESC
+    SQL;
+
+    $expected = <<<SQL
+            SELECT   wp_posts.* FROM wp_posts  INNER JOIN wp_postmeta ON ( wp_posts."ID" = wp_postmeta.post_id )
+            WHERE 1=1  AND ( 
+                wp_posts.post_date > '2024-07-17 23:59:59'
+            ) AND ( 
+                wp_postmeta.meta_key = 'make_feature_post'
+            ) AND (
+                (wp_posts.post_type = 'announcement' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'acf-disabled' OR wp_posts.post_status = 'private'))
+            )
+            
+            ORDER BY CAST(wp_postmeta.meta_value AS INTEGER) DESC, wp_posts.post_date DESC
+    SQL;
+
+    $postgresql = pg4wp_rewrite($sql);
+    $this->assertSame(trim($expected), trim($postgresql));
+    }
+
+