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_0_STABLE Details ------- http://git.postgresql.org/pg/commitdiff/9354f5b76acf37c96ed0173ff8ab3e415bae2b04 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
