CreateQuery test_table (children 3)
 Identifier test_table
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration eventType (children 1)
    DataType String
   ColumnDeclaration timestamp (children 1)
    DataType UInt64
   ColumnDeclaration key (children 1)
    DataType UInt64
 Storage definition (children 4)
  Function ReplacingMergeTree
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier eventType
    Identifier timestamp
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier eventType
    Identifier timestamp
    Identifier key
  Set
