From bf33ef569919e8c17e70de46b876ef5b80059807 Mon Sep 17 00:00:00 2001
From: lukaseder <lukas.eder@gmail.com>
Date: Wed, 8 Aug 2018 10:14:03 +0200
Subject: [PATCH] [#7725] Support parsing unknown, parameterless functions

---
 .../main/resources/org/jooq/web/grammar-3.12.txt  |  1 +
 jOOQ/src/main/java/org/jooq/impl/ParserImpl.java  | 15 +++++++++------
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt b/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt
index 257348abb6..5d488efb3e 100644
--- a/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt
+++ b/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt
@@ -753,6 +753,7 @@ term =
 | '{' 't' stringLiteral '}'
 | '{' 'fn' term '}'
 | '{' 'ts' stringLiteral '}'
+| identifier '(' [ field { ',' field } ] ')'
 ;
 
 truthValue = 'TRUE' | 'FALSE' | 'NULL'
diff --git a/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java b/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
index 098c7fc04b..64b9939e2d 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
@@ -4608,7 +4608,7 @@ final class ParserImpl implements Parser {
                         return field;
                     else if ((field = parseFieldPowerIf(ctx)) != null)
                         return field;
-                    else if (parseFunctionNameIf(ctx, "PI"))
+                    else if (parseFunctionNameIf(ctx, "PI") && parse(ctx, '(') && parse(ctx, ')'))
                         return pi();
 
                 if (parseKeywordIf(ctx, "PRIOR"))
@@ -6876,12 +6876,15 @@ final class ParserImpl implements Parser {
         if (ctx.dsl.settings().getParseUnknownFunctions() == ParseUnknownFunctions.IGNORE && parseIf(ctx, '(')) {
             List<Field<?>> arguments = new ArrayList<Field<?>>();
 
-            do {
-                arguments.add(parseField(ctx));
-            }
-            while (parseIf(ctx, ','));
+            if (!parseIf(ctx, ')')) {
+                do {
+                    arguments.add(parseField(ctx));
+                }
+                while (parseIf(ctx, ','));
+
+                parse(ctx, ')');
+            }
 
-            parse(ctx, ')');
             return function(name, Object.class, arguments.toArray(EMPTY_FIELD));
         }
         else {