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You need to use extern "C" in C++ when declaring a function that was implemented/compiled in C.Using extern "C" lets the compiler know that we want to use C naming and calling conventions. This causes the compiler to sort of entering C mode inside our C++ code. This is needed because C++ compilers mangle the names in their symbol table differently than C compilers and hence behave differently than C compilers.
Yes, a Python dictionary is thread safe. Actually, all built-ins in python are thread safe. You can read moreabout this in the documentation: https://docs.python.org/3/glossary.html#term-global-interpreter-lock
Please note that IC_MODELER role assigned to your user means he can only create and use private Information Views. Normally IC_MODELER role also includes IC_PUBLIC role so users who has IC_MODELER role assigned, they are also granted with IC_PUBLIC role which is required to view Information views shared by other users.Please check If IC_PUBLIC role is available in that user profile, if not try adding that role separately.
This is due to the fact that C++ does not do bounds checking. Languages like Java and python have bounds checking so if you try to access an out of bounds element, they throw an error. C++ design principle was that it shouldn't be slower than the equivalent C code, and C doesn't do array bounds checking.So if you try to access this out of bounds memory, the behavior of your program is undefined as this is written in the C++ standard. In general, whenever you encounter undefined behavior, anything might happen. The application may crash, it may freeze, it ... Read More
To create physical tables, uploading data and creating information views IC_MODELER role is required. If these users are only assigned with IC_PUBLIC role, they can view information views created by other users but can’t create their own views.
In SAP HANA, following engine types are available:Join Engine: This is used for attribute viewsOLAP engine: This is used for analytic viewsCalculation Engine: This is used for calculation views
Assuming a following text file (dict.txt) is present1 aaa2 bbb3 cccFollowing Python code reads the file using open() function. Each line as string is split at space character. First component is used as key and second as valued = {} with open("dict.txt") as f: for line in f: (key, val) = line.split() d[int(key)] = val print (d)The output shows contents of file in dictionary form{1: 'aaa', 2: 'bbb', 3: 'ccc'}
There are four ways of passing objects to functions. Let's assume you have a class X and want to pass it to a function fun, then − Pass by value This creates a shallow local copy of the object in the function scope. Things you modify here won't be reflected in the object passed to it. For example, Declaration void fun(X x); Calling X x; fun(x); Pass by reference This passes a reference to the object to the function. Things you modify here will be reflected in the object passed to it. No copy of the ... Read More
Once data is published to HANA database, you cannot rename the table. In this case, you have to delete the table from Schema in HANA database.
You can use any hashable object like int, string, etc as a key in a python dict. You need to separate it from the value using the ':' delimiter. The value can be any type of object. Consecutive key value pairs must be separated by a comma.