plpgsql: pure parser and reentrant scanner The plpgsql scanner is a wrapper around the core scanner, which already uses the flex %option reentrant. This patch only pushes up a few levels the place where the scanner handle is allocated. Before, it was allocated in pl_scanner.c in a global variable, so to the outside the scanner was not reentrant. Now, it is allocated in pl_comp.c and is passed as an argument to yyparse(), similar to how it is handled in other reentrant scanners.
Also use flex yyextra to handle context information, instead of global variables. Again, this uses the existing yyextra support in the core scanner. This complements the other changes to make the scanner reentrant. The bison option %pure-parser is used to make the generated parser pure. This happens in the usual way, since plpgsql has its own bison parser definition. Reviewed-by: Heikki Linnakangas <hlinn...@iki.fi> Discussion: https://www.postgresql.org/message-id/flat/eb6faeac-2a8a-4b69-9189-c33c520e5...@eisentraut.org Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/7b27f5fd36cb3270e8ac25aefd73b552663d1392 Modified Files -------------- src/pl/plpgsql/src/nls.mk | 2 +- src/pl/plpgsql/src/pl_comp.c | 47 ++- src/pl/plpgsql/src/pl_gram.y | 820 +++++++++++++++++++++------------------- src/pl/plpgsql/src/pl_scanner.c | 233 ++++++------ src/pl/plpgsql/src/plpgsql.h | 33 +- 5 files changed, 598 insertions(+), 537 deletions(-)
