diff --git a/UPGRADE.md b/UPGRADE.md
index 91e57013d29..901ca24f970 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -23,6 +23,10 @@ Some of the constants were renamed in the process:
 * `DATETIMETZ` -> `DATETIMETZ_MUTABLE`
 * `TIME` -> `TIME_MUTABLE`
 
+## Deprecated `SQLParserUtils` constants
+
+The constants in `Doctrine\DBAL\SQLParserUtils` have been deprecated and will be made private in 3.0.
+
 # Upgrade to 2.9
 
 ## Deprecated `Statement::fetchColumn()` with an invalid index
@@ -92,7 +96,7 @@ This method now throws SPL ``UnexpectedValueException`` instead of accidentally
 
 ## Doctrine\DBAL\Connection::TRANSACTION_* constants deprecated
 
-``Doctrine\DBAL\Connection::TRANSACTION_*`` were moved into ``Doctrine\DBAL\TransactionIsolationLevel`` class without the ``TRANSACTION_`` prefix. 
+``Doctrine\DBAL\Connection::TRANSACTION_*`` were moved into ``Doctrine\DBAL\TransactionIsolationLevel`` class without the ``TRANSACTION_`` prefix.
 
 ## DEPRECATION: direct usage of the PDO APIs in the DBAL API
 
diff --git a/lib/Doctrine/DBAL/SQLParserUtils.php b/lib/Doctrine/DBAL/SQLParserUtils.php
index 0ff0456a00e..9768883846e 100644
--- a/lib/Doctrine/DBAL/SQLParserUtils.php
+++ b/lib/Doctrine/DBAL/SQLParserUtils.php
@@ -30,12 +30,12 @@ class SQLParserUtils
      */
     public const POSITIONAL_TOKEN = '\?';
     public const NAMED_TOKEN      = '(?<!:):[a-zA-Z_][a-zA-Z0-9_]*';
-    /**#@-*/
-
     // Quote characters within string literals can be preceded by a backslash.
     public const ESCAPED_SINGLE_QUOTED_TEXT   = "(?:'(?:\\\\\\\\)+'|'(?:[^'\\\\]|\\\\'?|'')*')";
     public const ESCAPED_DOUBLE_QUOTED_TEXT   = '(?:"(?:\\\\\\\\)+"|"(?:[^"\\\\]|\\\\"?)*")';
     public const ESCAPED_BACKTICK_QUOTED_TEXT = '(?:`(?:\\\\\\\\)+`|`(?:[^`\\\\]|\\\\`?)*`)';
+    /**#@-*/
+
     private const ESCAPED_BRACKET_QUOTED_TEXT = '(?<!\b(?i:ARRAY))\[(?:[^\]])*\]';
 
     /**