CreateQuery mutation_table (children 3)
 Identifier mutation_table
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration date (children 1)
    DataType Date
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration value (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier date
  Function tuple (children 1)
   ExpressionList
