Re: [HACKERS] GSoC 2017

2017-01-10 12:53 GMT+03:00 Alexander Korotkov : > > 1. What project ideas we have? > > Hi! We would like to propose a project on rewriting PostgreSQL executor from traditional Volcano-style [1] to so-called push-based architecture as implemented in Hyper [2][3] and

[HACKERS] Non-deterministic behavior with floating point in parallel mode

Hi hackers, We have found that in parallel mode result of queries is non-deterministic when the types of the attributes in table are double precision (floating-point). Our example is based on TPC-H, but some NUMERIC columns type was changed to DOUBLE PRECISION; When running without parallelism