Explain EXPLAIN SYNTAX (children 2)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 65)
     Function CAST (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal \'INT\'
     Function CEIL (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function CEILING (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function CHAR (children 1)
      ExpressionList (children 1)
       Literal UInt64_49
     Function CHAR_LENGTH (children 1)
      ExpressionList (children 1)
       Literal \'1\'
     Function CHARACTER_LENGTH (children 1)
      ExpressionList (children 1)
       Literal \'1\'
     Function COALESCE (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function CONCAT (children 1)
      ExpressionList (children 2)
       Literal \'1\'
       Literal \'1\'
     Function CORR (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function COS (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function COUNT (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function COVAR_POP (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function COVAR_SAMP (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function DATABASE (children 1)
      ExpressionList
     Function SCHEMA (children 1)
      ExpressionList
     Function dateDiff (children 1)
      ExpressionList (children 3)
       Literal \'DAY\'
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2020-10-24\'
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2019-10-24\'
     Function EXP (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function FLATTEN (children 1)
      ExpressionList (children 1)
       Literal Array_[Array_[UInt64_1]]
     Function FLOOR (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function FQDN (children 1)
      ExpressionList
     Function GREATEST (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function IF (children 1)
      ExpressionList (children 3)
       Literal UInt64_1
       Literal UInt64_1
       Literal UInt64_1
     Function IFNULL (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function LCASE (children 1)
      ExpressionList (children 1)
       Literal \'A\'
     Function LEAST (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function LENGTH (children 1)
      ExpressionList (children 1)
       Literal \'1\'
     Function LN (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function LOG (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function LOG10 (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function LOG2 (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function LOWER (children 1)
      ExpressionList (children 1)
       Literal \'A\'
     Function MAX (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function MID (children 1)
      ExpressionList (children 3)
       Literal \'123\'
       Literal UInt64_1
       Literal UInt64_1
     Function MIN (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function MOD (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function not (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function NOW (children 1)
      ExpressionList
     Function NOW64 (children 1)
      ExpressionList
     Function NULLIF (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function PI (children 1)
      ExpressionList
     Function position (children 1)
      ExpressionList (children 2)
       Literal \'123\'
       Literal \'2\'
     Function POW (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function POWER (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     Function RAND (children 1)
      ExpressionList
     Function REPLACE (children 1)
      ExpressionList (children 3)
       Literal \'1\'
       Literal \'1\'
       Literal \'2\'
     Function REVERSE (children 1)
      ExpressionList (children 1)
       Literal \'123\'
     Function ROUND (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function SIN (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function SQRT (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function STDDEV_POP (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function STDDEV_SAMP (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function SUBSTR (children 1)
      ExpressionList (children 2)
       Literal \'123\'
       Literal UInt64_2
     Function substring (children 1)
      ExpressionList (children 2)
       Literal \'123\'
       Literal UInt64_2
     Function SUM (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function TAN (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function TANH (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function TRUNC (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function TRUNCATE (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function UCASE (children 1)
      ExpressionList (children 1)
       Literal \'A\'
     Function UPPER (children 1)
      ExpressionList (children 1)
       Literal \'A\'
     Function USER (children 1)
      ExpressionList
     Function VAR_POP (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function VAR_SAMP (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
     Function WEEK (children 1)
      ExpressionList (children 1)
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2020-10-24\'
     Function YEARWEEK (children 1)
      ExpressionList (children 1)
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2020-10-24\'
 Identifier TSVRaw
