CreateQuery md (children 3)
 Identifier md
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration key (children 1)
    DataType UInt32
   ColumnDeclaration t (children 1)
    DataType DateTime
   ColumnDeclaration bid (children 1)
    DataType Float64
   ColumnDeclaration ask (children 1)
    DataType Float64
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier key
    Identifier t