postgreSQL

This is collection of modified source code for postgreSQL that:

• uses Most Recently Used (MRU) as databse buffer replacement policy,
• has an overridden OFFSET clause that skips every other k rows,
• forces query optimizer to use nested loop join (except for FULL JOIN).

MRU

Modified files:

• src/include/storage/buf_internals.h
• src/backend/storage/buffer/buf_init.c
• src/backend/storage/buffer/freelist.c
• src/backend/storage/buffer/bufmgr.c

OFFSET

Modified files:

• /backenexecutor/nodeLimit.c

Forced Nested Loop Join

Modified files:

• /backend/optimizer/createplan.c