txt: ## dist_cpan-DMAESTRO-SQL-Lexer.md
  # SQL::Lexer
  
  \*\* Under Construction - Pull requests welcome \*\*
  
  ## Description
  
  This grammer is a foundation for SQL Language parsers. It handles the common
  lexical constructs of SQL.
  
  ## Primary Tokens
  
  ### Special Characters
  
  * `singlequote`
  * `doublequote`
  * `quote` - either single or double
  * `backquote`
  * `period`
  * `underscore`
  * `plus-sign`
  * `minus-sign`
  * `left-paren`
  * `right-paren`
  * `colon`
  * `semicolon`
  * `comma`
  * `solidus` - ordinary forward slash
  
  ### Comments
  
  * `simple-comment` - '--' or '#' to end-of-line
  * `bracketed-comment` - '/\*' to '\*/' multi-line comment
  * `comment` - either of the above
  
  ### Literals
  
  * `literal`
  * `signed-numeric-literal`
  * `unsigned-numeric-literal`
  * `char-sting-literal`
  * `datetime-literal`
  * `interval-literal`
  * `date-string`
  * `time-string`
  * `timestamp-string`
  * `boolean-literal`
  
  ### Operators
  
  * `operator-symbol`
  * `equals-operator`
  * `non-equals-operator`
  * `less-than-operator`
  * `greater-than-operator`
  * `plus-operator`
  * `minus-operator`
  * `multiply-operator`
  * `divide-operator`
  * `greater-than-or-equals-operator`
  * `less-than-or-equals-operator`
  
  ### Identifiers
  
  * `quoted-label` quoted with backtick
  * `regular-identifier`
  * `keyword`
  * `non-reserved-word`
  * `reserved-word`
  
  === Other ===
  
  * `variable`
  