| I use the first | |
| —– BEGIN LICENSE —– | |
| Michael Barnes | |
| Single User License | |
| EA7E-821385 | |
| 8A353C41 872A0D5C DF9B2950 AFF6F667 | |
| C458EA6D 8EA3C286 98D1D650 131A97AB | |
| AA919AEC EF20E143 B361B1E7 4C8B7F04 |
| This note explains how to build Postgres from source and setup to debug it using LLDB on a Mac. I used this technique to research this article: | |
| http://patshaughnessy.net/2014/10/13/following-a-select-statement-through-postgres-internals | |
| 1. Shut down existing postgres if necessary - you don’t want to mess up your existing DB or work :) | |
| $ ps aux | grep postgres | |
| pat 456 0.0 0.0 2503812 828 ?? Ss Sun10AM 0:11.59 postgres: stats collector process | |
| pat 455 0.0 0.0 2649692 2536 ?? Ss Sun10AM 0:05.00 postgres: autovacuum launcher process | |
| pat 454 0.0 0.0 2640476 304 ?? Ss Sun10AM 0:00.74 postgres: wal writer process | |
| pat 453 0.0 0.0 2640476 336 ?? Ss Sun10AM 0:00.76 postgres: writer process |
Many different applications claim to support regular expressions. But what does that even mean?
Well there are lots of different regular expression engines, and they all have different feature sets and different time-space efficiencies.
The information here is just copied from: http://regular-expressions.mobi/refflavors.html