CreateQuery merge_tree_pk_sql (children 3)
 Identifier merge_tree_pk_sql
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration value (children 1)
    DataType String
  Identifier key
 Storage definition (children 1)
  Function ReplacingMergeTree (children 1)
   ExpressionList
