Im new to postgres and I'm about to implement the algorithm "double pipelined hash join". I've started using SPI functions but soon I realised that I 'm not at the right way (am I?). Is there a way that I'm not obliged to change code of the optimizer of postgres but to write a seperate code as a new function?I've been told by my supervisor that I should use the function that is doing the hashing of a relation. There is a chaos !!!!Please help!!I'm reading the documentation of postgres and some '.c .h' files (mainly the createplan.c at the directory "~/src/backend/optimizer/plan/") to figer out what to do and from where to start.
Regards!!!!
Martha
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