|
taco-db
0.1.0
|
This file contains the definition of the function manager and function-call interface, which is a simplified version of fmgr.h in PostgreSQL. More...
Go to the source code of this file.
Classes | |
| struct | taco::FunctionCallInfo |
| This struct is the data actually passed to an fmgr function. More... | |
Namespaces | |
| taco | |
Macros | |
| #define | FMGR_FUNCTION_ARGS ::taco::FunctionCallInfo &fcinfo_ |
| #define | FMGR_NARGS() (fcinfo_.args.size()) |
| Get number of arguments passed to the function. More... | |
| #define | FMGR_ARG(n) (fcinfo_.args[n]) |
| Get the n^th argument passed to the function. More... | |
| #define | FMGR_TYPPARAM() (fcinfo_.typparam) |
| Get the type parameter passed to the function. More... | |
| #define | FMGR_RETURN_VOID() return Datum::From(0) |
| If any function needs to return void, use this macro. More... | |
Typedefs | |
| typedef Datum(* | taco::FunctionPtr) (FunctionCallInfo &fcinfo) |
| typedef std::function< Datum(FunctionCallInfo &)> | taco::FunctionInfo |
| An FMGR managed function should be declared as. More... | |
Functions | |
| template<class ... Args> | |
| Datum | taco::FunctionCall (const FunctionInfo &func, Args &&...args) |
| Call a function without passing any type parameter for the return type. More... | |
| template<class ... Args> | |
| Datum | taco::FunctionCallWithTypparam (const FunctionInfo &func, uint64_t typparam, Args &&...args) |
This file contains the definition of the function manager and function-call interface, which is a simplified version of fmgr.h in PostgreSQL.
See COPYRIGHT for a copyright notice of code copied or derived from PostgreSQL.
This file does not have a header guard intentionally. It must be included indirectly from base/tdb_base.h.
| #define FMGR_ARG | ( | n | ) | (fcinfo_.args[n]) |
Get the n^th argument passed to the function.
| #define FMGR_FUNCTION_ARGS ::taco::FunctionCallInfo &fcinfo_ |
| #define FMGR_NARGS | ( | ) | (fcinfo_.args.size()) |
Get number of arguments passed to the function.
| #define FMGR_RETURN_VOID | ( | ) | return Datum::From(0) |
If any function needs to return void, use this macro.
Don't return a NULL value.
| #define FMGR_TYPPARAM | ( | ) | (fcinfo_.typparam) |
Get the type parameter passed to the function.
Only valid when the function is called with FunctionCallWithTypparam().
1.9.1