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Fix bug with page compression

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This commit is contained in:
Konstantin Knizhnik
2018-11-07 22:06:50 +03:00
parent 3769efdcb2
commit 62d0f5fc97
1 changed files with 2 additions and 2 deletions
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src/data.c
+2 -2
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@@ -368,7 +368,7 @@ compress_and_backup_page(pgFile *file, BlockNumber blknum,
BackupPageHeader header;
size_t write_buffer_size = sizeof(header);
char write_buffer[BLCKSZ+sizeof(header)];
char compressed_page[BLCKSZ];
char compressed_page[BLCKSZ*2]; /* compressed page may require more space than uncompressed */
if(page_state == SkipCurrentPage)
return;
@@ -395,7 +395,7 @@ compress_and_backup_page(pgFile *file, BlockNumber blknum,
Assert (header.compressed_size <= BLCKSZ);
/* The page was successfully compressed. */
if (header.compressed_size > 0)
if (header.compressed_size > 0 && header.compressed_size < BLCKSZ)
{
memcpy(write_buffer, &header, sizeof(header));
memcpy(write_buffer + sizeof(header),