CreateQuery mv_projections (children 4)
 Identifier mv_projections
 Columns definition (children 2)
  ExpressionList (children 1)
   ColumnDeclaration key (children 1)
    DataType String
  ExpressionList (children 1)
   Projection (children 1)
    ProjectionSelectQuery (children 1)
     ExpressionList (children 1)
      Function uniqCombined (children 1)
       ExpressionList (children 1)
        Identifier key
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier data
 ViewTargets (children 1)
  Storage definition (children 2)
   Function MergeTree
   Identifier key
