Hi, I am working on a course project on implementing collection of statistics on views in pgsql. The statistics will be used in conjunction with view matching in the optimizer, to improve selectivity estimates.
For this to be possible, I need to be able to execute view definitions from within the analyze code (so I can then sample the result set and collect the statistics on the sampled tuples). Is there a preferred way to do this? A simple solution is to use the SPI, but is this really recommended for use from within this code? I don't want to materialize the result set, but calculate the statistics directly in memory and just throw away the tuples that's not part of the sample. I would be very grateful for any hints about this? Best Oscar Täckström PhD Student University of Waterloo ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
