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Clear up btree_xlog_split() alignment comment.

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Adjust a comment that describes how alignment of the new left page high
key works in btree_xlog_split(), the nbtree page split REDO routine.
The wording used before commit 2c03216d83 is much clearer, so go back
to that.
This commit is contained in:
Peter Geoghegan 2020-01-02 18:30:25 -08:00
parent 90d7f6604b
commit 0c41c83d8f
1 changed files with 5 additions and 1 deletions
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6
src/backend/access/nbtree/nbtxlog.c
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@ -281,7 +281,11 @@ btree_xlog_split(bool onleft, XLogReaderState *record)
datalen -= newitemsz;
}
/* Extract left hikey and its size (assuming 16-bit alignment) */
/*
* Extract left hikey and its size. We assume that 16-bit alignment
* is enough to apply IndexTupleSize (since it's fetching from a
* uint16 field).
*/
left_hikey = (IndexTuple) datapos;
left_hikeysz = MAXALIGN(IndexTupleSize(left_hikey));
datapos += left_hikeysz;