>antlr4 PlSqlLexer.g4
>java org.antlr.v4.Tool PlSqlLexer.g4
>antlr4 PlSqlParser.g4
>java org.antlr.v4.Tool PlSqlParser.g4

> javac Pl*.java

>grep -i grammar *.g4
PlSqlLexer.g4:lexer grammar PlSqlLexer;
PlSqlParser.g4:parser grammar PlSqlParser;

>grun PlSql r -tree
>grun PlSql r -gui

>java org.antlr.v4.gui.TestRig PlSql r -gui
SELECT FIELD1 FROM TABLE1;
^Z
No method for rule r or it has arguments