CreateQuery prewhere_column_missing (children 3)
 Identifier prewhere_column_missing
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration d (children 2)
    DataType Date
    Literal \'2015-01-01\'
   ColumnDeclaration x (children 1)
    DataType UInt64
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier d
    Identifier x
    Literal UInt64_1