CreateQuery prewhere (children 3)
 Identifier prewhere
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration d (children 1)
    DataType Date
   ColumnDeclaration a (children 1)
    DataType String
   ColumnDeclaration b (children 1)
    DataType String
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier d
    Identifier d
    Literal UInt64_8192
