CreateQuery mutation_table (children 3)
 Identifier mutation_table
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration dt (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Date
   ColumnDeclaration name (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList