Don't use abbreviated keys for the final merge pass.
When we write tuples out to disk and read them back in, the abbreviated
keys become non-abbreviated, because the readtup routines don't know
anything about abbreviation. But without this fix, the rest of the
code still thinks the abbreviation-aware compartor should be used,
so chaos ensues.
Report by Andrew Gierth; patch by Peter Geoghegan.
Branch
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master
Details
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http://git.postgresql.org/pg/commitdiff/5cefbf5a6c4466ac6b1cc2a4316b4eba9108c802
Modified Files
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src/backend/utils/sort/tuplesort.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)