Fix nbtree high key "continuescan" row compare bug.
Commit 29b64d1d mishandled skipping over truncated high key attributes
during row comparisons. The row comparison key matching loop would loop
forever when a truncated attribute was encountered for a row compare
subkey. Fix by following the example of other code in the loop: advance
the current subkey, or break out of the loop when the last subkey is
reached.
Add test coverage for the relevant _bt_check_rowcompare() code path.
The new test case is somewhat tied to nbtree implementation details,
which isn't ideal, but seems unavoidable.
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/76a39f2295ecb040f2ea052320941e1eb9b526c0
Modified Files
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src/backend/access/nbtree/nbtutils.c | 3 +++
src/test/regress/expected/index_including.out | 21 ++++++++++++++++++++-
src/test/regress/sql/index_including.sql | 8 +++++++-
3 files changed, 30 insertions(+), 2 deletions(-)