github.com/datachainlab/burrow@v0.25.0/event/query/query.peg (about)

     1  package query
     2  
     3  type QueryParser Peg {
     4  }
     5  
     6  e <- '\"' condition ( ' '+ and ' '+ condition )* '\"' !.
     7  
     8  condition <- tag ' '* (le ' '* (number / time / date)
     9                        / ge ' '* (number / time / date)
    10                        / l ' '* (number / time / date)
    11                        / g ' '* (number / time / date)
    12                        / equal ' '* (number / time / date / value)
    13                        / contains ' '* value
    14                        )
    15  
    16  tag <- < (![ \t\n\r\\()"'=><] .)+ >
    17  value <- < '\'' (!["'] .)* '\''>
    18  number <- < ('0'
    19             / [1-9] digit* ('.' digit*)?) >
    20  digit <- [0-9]
    21  time <- "TIME " < year '-' month '-' day 'T' digit digit ':' digit digit ':' digit digit (('-' / '+') digit digit ':' digit digit / 'Z') >
    22  date <- "DATE " < year '-' month '-' day >
    23  year <- ('1' / '2') digit digit digit
    24  month <- ('0' / '1') digit
    25  day <- ('0' / '1' / '2' / '3') digit
    26  and <- "AND"
    27  
    28  equal <- "="
    29  contains <- "CONTAINS"
    30  le <- "<="
    31  ge <- ">="
    32  l <- "<"
    33  g <- ">"