From a8ffd253aa2d1a34b27127559195db82e34adb58 Mon Sep 17 00:00:00 2001
From: Knut Wannheden <knut.wannheden@gmail.com>
Date: Fri, 30 Aug 2019 13:40:30 +0200
Subject: [PATCH] [jOOQ/jOOQ#9111] Support parsing COUNT(DISTINCT (A, B))

Dialects like H2 and PostgreSQL allow row value expressions following
the `DISTINCT` keyword.
---
 jOOQ/src/main/java/org/jooq/impl/ParserImpl.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java b/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
index dc2688c511..3e68f6b464 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
@@ -8713,12 +8713,17 @@ final class ParserImpl implements Parser {
                 else
                     return count();
 
+            boolean parens = parseIf(ctx, '(');
+
             QualifiedAsterisk asterisk = parseQualifiedAsteriskIf(ctx);
             List<Field<?>> fields = (asterisk == null)
                 ? distinct
                     ? parseFields(ctx)
                     : Collections.<Field<?>>singletonList(parseField(ctx))
                 : null;
+
+            if (parens)
+                parse(ctx, ')');
             parse(ctx, ')');
 
             if (distinct)