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Andrew Gierth a40631a920 Fix lexing of standard multi-character operators in edge cases. ... Commits c6b3c939b (which fixed the precedence of >=, <=, <> operators) and 865f14a2d (which added support for the standard => notation for named arguments) created a class of lexer tokens which look like multi-character operators but which have their own token IDs distinct from Op. However, longest-match rules meant that following any of these tokens with another operator character, as in (1<>-1), would cause them to be incorrectly returned as Op. The error here isn't immediately obvious, because the parser would usually still find the correct operator via the Op token, but there were more subtle problems: 1. If immediately followed by a comment or +-, >= <= <> would be given the old precedence of Op rather than the correct new precedence; 2. If followed by a comment, != would be returned as Op rather than as NOT_EQUAL, causing it not to be found at all; 3. If followed by a comment or +-, the => token for named arguments would be lexed as Op, causing the argument to be mis-parsed as a simple expression, usually causing an error. Fix by explicitly checking for the operators in the {operator} code block in addition to all the existing special cases there. Backpatch to 9.5 where the problem was introduced. Analysis and patch by me; review by Tom Lane. Discussion: https://postgr.es/m/87va851ppl.fsf@news-spur.riddles.org.uk		8 years ago
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.gitignore	Move psql's psqlscan.l into src/fe_utils.	10 years ago
Makefile	Add \if support to pgbench	8 years ago
conditional.c	Post-feature-freeze pgindent run.	8 years ago
mbprint.c	Update copyright for 2018	9 years ago
print.c	Switch client-side code to include catalog/pg_foo_d.h not pg_foo.h.	8 years ago
psqlscan.l	Fix lexing of standard multi-character operators in edge cases.	8 years ago
simple_list.c	Update copyright for 2018	9 years ago
string_utils.c	Ensure schema qualification in pg_restore DISABLE/ENABLE TRIGGER commands.	8 years ago