Method setStructureHint

src/TableFunctions/ITableFunction.h:74–74

Set a structure hint from SELECT query in case of INSERT INTO FUNCTION ... SELECT ... and INSERT INTO ... SELECT ... FROM table_function(...) This hint could be used not to repeat schema in function arguments.

    /// INSERT INTO FUNCTION ... SELECT ... and INSERT INTO ... SELECT ... FROM table_function(...)
    /// This hint could be used not to repeat schema in function arguments.
    virtual void setStructureHint(const ColumnsDescription &) {}

    /// Used for table functions that can use structure hint during INSERT INTO ... SELECT ... FROM table_function(...)
    /// It returns possible virtual column names of corresponding storage. If select query contains