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Support INCLUDE'd columns in SP-GiST.

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Not much to say here: does what it says on the tin.
We steal a previously-always-zero bit from the nextOffset
field of leaf index tuples in order to track whether there
is a nulls bitmap.  Otherwise it works about like included
columns in other index types.

Pavel Borisov, reviewed by Andrey Borodin and Anastasia Lubennikova,
and rather heavily editorialized on by me

Discussion: https://postgr.es/m/CALT9ZEFi-vMp4faht9f9Junb1nO3NOSjhpxTmbm1UGLMsLqiEQ@mail.gmail.com
This commit is contained in:
Tom Lane
2021-04-05 18:41:09 -04:00
parent 49f49defe7
commit 09c1c6ab4b
21 changed files with 630 additions and 232 deletions
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3
src/include/access/itup.h
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@@ -154,6 +154,9 @@ extern Datum nocache_index_getattr(IndexTuple tup, int attnum,
TupleDesc tupleDesc);
extern void index_deform_tuple(IndexTuple tup, TupleDesc tupleDescriptor,
Datum *values, bool *isnull);
extern void index_deform_tuple_internal(TupleDesc tupleDescriptor,
Datum *values, bool *isnull,
char *tp, bits8 *bp, int hasnulls);
extern IndexTuple CopyIndexTuple(IndexTuple source);
extern IndexTuple index_truncate_tuple(TupleDesc sourceDescriptor,
IndexTuple source, int leavenatts);