CreateQuery ds (children 3)
 Identifier ds
 Columns definition (children 1)
  ExpressionList (children 5)
   ColumnDeclaration pk1 (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration pk2 (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration pk3 (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration pk4 (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration occurences (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 1)
      Identifier count
 Storage definition (children 2)
  Function ReplicatedAggregatingMergeTree (children 1)
   ExpressionList (children 2)
    Function concat (children 1)
     ExpressionList (children 3)
      Literal \'/clickhouse/\'
      Function currentDatabase (children 1)
       ExpressionList
      Literal \'/ds/{shard}/\'
    Literal \'{replica}\'
  Function tuple (children 1)
   ExpressionList (children 4)
    Identifier pk1
    Identifier pk2
    Identifier pk3
    Identifier pk4
