Обсуждение: [COMMITTERS] pgsql: Add regression tests exercising more code paths in nodeLimit.c.

Add regression tests exercising more code paths in nodeLimit.c.

Perusal of the code coverage report shows that the existing regression
test cases for LIMIT/OFFSET don't exercise the nodeLimit code paths
involving backwards scan, empty results, or null values of LIMIT/OFFSET.
Improve the coverage.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/3c8de95979008d67713429d858957c5c78c23d75

Modified Files
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src/test/regress/expected/limit.out | 179 ++++++++++++++++++++++++++++++++++++
src/test/regress/sql/limit.sql      |  42 +++++++++
2 files changed, 221 insertions(+)