esper-5.0 may contain BUG to recognize functions case-sensitive

ASTLibFunctionHelper.java

// line 302
boolean filtered = childNodeText.startsWith("f");
if (childNodeText.equals("min") || childNodeText.equals("fmin")) { //toLowerCase().equals("min")
    minMaxTypeEnum = MinMaxTypeEnum.MIN;
}
else if (childNodeText.equals("max") || childNodeText.equals("fmax")) {
    minMaxTypeEnum = MinMaxTypeEnum.MAX;
}
else {
    throw ASTWalkException.from("Uncountered unrecognized min or max node '" + ident + "'");
}

gistfile1.txt

SELECT MAX(size) AS maxsize, fraud.aaa, bbb FROM FraudWarningEvent.win:keepall() AS fraud, PINChangeEvent(size > 10).win:time(20 sec) WHERE fraud.accountNumber.substr(0,8) = substr(PINChangeEvent.accountNumber, 0, 8) AND cast(PINChangeEvent.size,double) > 10.5

com/espertech/esper/epl/parse/ASTWalkException.java:27:in `from': com.espertech.esper.epl.parse.ASTWalkException: Uncountered unrecognized min or max node 'MAX'
	from com/espertech/esper/epl/parse/ASTLibFunctionHelper.java:302:in `handleMinMax'
	from com/espertech/esper/epl/parse/ASTLibFunctionHelper.java:140:in `handleLibFunc'
	from com/espertech/esper/epl/parse/EPLTreeWalkerListener.java:302:in `exitLibFunction'
	from com/espertech/esper/epl/generated/EsperEPL2GrammarParser.java:13692:in `exitRule'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:71:in `exitRule'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:54:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from org/antlr/v4/runtime/tree/ParseTreeWalker.java:52:in `walk'
	from com/espertech/esper/epl/parse/ParseHelper.java:55:in `walk'
	from java/lang/reflect/Method.java:606:in `invoke'
	from /Users/tagomoris/Documents/norikra/lib/norikra/query.rb:192:in `ast'
	from (pry):4:in `evaluate_ruby'
	from org/jruby/RubyBinding.java:134:in `eval'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:328:in `evaluate_ruby'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:278:in `re'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:254:in `rep'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:234:in `repl'
	from org/jruby/RubyKernel.java:1521:in `loop'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:232:in `repl'
	from org/jruby/RubyKernel.java:1284:in `catch'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:231:in `repl'
	from org/jruby/RubyKernel.java:1284:in `catch'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_instance.rb:230:in `repl'
	from /Users/tagomoris/Documents/norikra/vendor/jruby/1.9/gems/pry-0.9.12.6-java/lib/pry/pry_class.rb:169:in `start'
	from script/spec_server_pry:104:in `(root)'
	from script/script/spec_server_pry:104:in `(root)'

I declare this patch is under GPLv2.