fixed segmentation fault in client if the result is null, e.g. for alter
table
changed sample size for analyze to 30,000,000
util scripts
Merge branch 'piggyback_master' of https://github.com/mpws2013n1/postgres into piggyback_master
Merge branch 'selection_handler' into piggyback_master
renamed field for n_distinct in backend struct
started implementing min/max/distinct value checking in root node, but seems erroneous
write base statistics for n_distinct into our struct (real number of
tuples!)
Merge branch 'piggyback_master' of https://github.com/mpws2013n1/postgres into piggyback_master
callgrind output for fd benchmarking on tpch
optimized hash_add_string for fds
7.a: Implemented base stats and tree collected stats validity check
Merge branch 'piggyback_master' of https://github.com/mpws2013n1/postgres into piggyback_master
fixed auto-merging "distinct-status"
removed old volatile and old comments
added scripts
Merge branch 'piggyback_master' of https://github.com/mpws2013n1/postgres into piggyback_master
join nodes know which tables they could change
Merge branch 'piggyback_master' into selection_handler
set isFinal to 0 if there is a join for a table
fixed bug: select * works