Обсуждение: pgsql: Add makefile rules to check for backtracking in backend and psql

Add makefile rules to check for backtracking in backend and psql lexers.

Per discussion, we should enforce the policy of "no backtracking" in these
performance-sensitive scanners.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/ecf248737a4c0705bf7d79fdd52b5271618f7103

Modified Files
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src/backend/parser/Makefile |    5 ++++-
src/backend/parser/scan.l   |    3 ++-
src/bin/psql/Makefile       |    5 +++--
3 files changed, 9 insertions(+), 4 deletions(-)