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Commitd150ff5

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Reset unused fields in GIN data leaf page footer.
The maxoff field is not used in the new, compressed page format. Let'sreset it when converting an old-format page to the new format. The codewon't care either way, but this makes it possible to use the field forsomething else in the future.
1 parenta8f3748 commitd150ff5

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2 files changed

+5
-1
lines changed

2 files changed

+5
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lines changed

‎src/backend/access/gin/gindatapage.c

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -817,7 +817,10 @@ dataPlaceToPageLeafRecompress(Buffer buf, disassembledLeaf *leaf,
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}
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Assert(newsize <=GinDataLeafMaxContentSize);
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GinDataLeafPageSetPostingListSize(page,newsize);
820-
GinPageSetCompressed(page);/* in case it was in pre-9.4 format before */
820+
821+
/* Reset these in case the page was in pre-9.4 format before */
822+
GinPageSetCompressed(page);
823+
GinPageGetOpaque(page)->maxoff=InvalidOffsetNumber;
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822825
/* Put WAL data */
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recompress_xlog.length= (uint16)newsize;

‎src/backend/access/gin/ginxlog.c

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -153,6 +153,7 @@ ginRedoRecompress(Page page, ginxlogRecompressDataLeaf *data)
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memcpy(segment,data->newdata,data->length-data->unmodifiedsize);
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GinDataLeafPageSetPostingListSize(page,data->length);
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GinPageSetCompressed(page);
156+
GinPageGetOpaque(page)->maxoff=InvalidOffsetNumber;
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}
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158159
staticvoid

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