CreateQuery table_with_lc_key (children 3)
 Identifier table_with_lc_key
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration enum_key (children 1)
    DataType Enum8 (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'x\'
        Literal UInt64_2
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'y\'
        Literal UInt64_1
   ColumnDeclaration lc_key (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration value (children 1)
    DataType String
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier enum_key
    Identifier lc_key
