CreateQuery t (children 3)
 Identifier t
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration arr.key (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType LowCardinality (children 1)
       ExpressionList (children 1)
        DataType String
   ColumnDeclaration arr.value (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType LowCardinality (children 1)
       ExpressionList (children 1)
        DataType String
 Storage definition (children 1)
  Function Memory
