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Diffstat (limited to 'src/backend/storage/buffer/bufmgr.c')
| -rw-r--r-- | src/backend/storage/buffer/bufmgr.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c index 9381f9981d3..597afedef70 100644 --- a/src/backend/storage/buffer/bufmgr.c +++ b/src/backend/storage/buffer/bufmgr.c @@ -739,7 +739,16 @@ ReadBuffer_common(SMgrRelation smgr, char relpersistence, ForkNumber forkNum, /* Substitute proper block number if caller asked for P_NEW */ if (isExtend) + { blockNum = smgrnblocks(smgr, forkNum); + /* Fail if relation is already at maximum possible length */ + if (blockNum == P_NEW) + ereport(ERROR, + (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED), + errmsg("cannot extend relation %s beyond %u blocks", + relpath(smgr->smgr_rnode, forkNum), + P_NEW))); + } if (isLocalBuf) { |