Fix psql lexer to avoid use of backtracking. Per previous experimentation, backtracking slows down lexing performance significantly (by about a third). It's usually pretty easy to avoid, just need to have rules that accept an incomplete construct and do whatever the lexer would have done otherwise.
The backtracking was introduced by the patch that added quoted variable substitution. Back-patch to 9.0 where that was added. Branch ------ REL9_1_STABLE Details ------- http://git.postgresql.org/pg/commitdiff/be93200c76911047dcb94ddb696441ecdef9a3cb Modified Files -------------- src/bin/psql/psqlscan.l | 33 ++++++++++++++++++++++++++++++++- 1 files changed, 32 insertions(+), 1 deletions(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
