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Code Issues Releases Activity

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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4
src/data.c
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@ -368,7 +368,7 @@ compress_and_backup_page(pgFile *file, BlockNumber blknum,
BackupPageHeader header; BackupPageHeader header;
size_t write_buffer_size = sizeof(header); size_t write_buffer_size = sizeof(header);
char write_buffer[BLCKSZ+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) if(page_state == SkipCurrentPage)
return; return;
@ -395,7 +395,7 @@ compress_and_backup_page(pgFile *file, BlockNumber blknum,
Assert (header.compressed_size <= BLCKSZ); Assert (header.compressed_size <= BLCKSZ);
/* The page was successfully compressed. */ /* 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, &header, sizeof(header));
memcpy(write_buffer + sizeof(header), memcpy(write_buffer + sizeof(header),