CreateQuery st_cm_lc (children 3)
 Identifier st_cm_lc
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration k (children 1)
    DataType UInt32
   ColumnDeclaration cat (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier k
  Set
