(postgres) Remove named capture brackets from regex in SQL query

ChangeLog

@@ -2,7 +2,8 @@ List of changes between releases of Extension:JsCalendar.
 
 == master branch (will become JsCalendar 0.4.1 or 0.5.0, depending on magnitude of changes) ==
 
-No changes since JsCalendar 0.4.0.
+Features:
+* Support PostgreSQL.
 
 == JsCalendar 0.4.0 ==
 

README.md

@@ -109,10 +109,6 @@ The following parameter within `<EventCalendar>` will change the color of event
     keywordcolor.arctic = yellow
     keywordcolor.statistically = lightgreen
 
-### Requirements
-
-* MySQL (this extension doesn't support PostgreSQL. Patches that add PostgreSQL support are very welcome, but maintainter of this extension won't be implementing this himself).
-
 ### Installation
 
 1. Deploy the files to `extensions/JsCalendar`.

includes/FindEventPagesQuery.php

@@ -109,6 +109,10 @@ public function setTitleRegex( $regex ) {
 			return;
 		}
 
+		// Don't include named capture brackets into the SQL query,
+		// they are not needed there, and PostgreSQL can't parse a regex that has them.
+		$regex = str_replace( [ '?<start>', '?<end>' ], '', $regex );
+
 		$rlike = $this->dbr->getType() === 'postgres' ? '~' : 'RLIKE';
 		$this->where[] = "page_title $rlike " . $this->dbr->addQuotes( $regex );
 	}