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column of a compressed table, the BTR_EXTERN_LEN field in the BLOB pointer will be written as 0. Tolerate this in the functions that deal with externally stored columns. This fixes Issue #80 and was posted at rb://26. Note that the clustered index record is always deleted or purged last, after any secondary index records referring to it have been deleted. btr_free_externally_stored_field(): On an uncompressed table, zero out the BTR_EXTERN_LEN, so that half-deleted BLOBs can be detected after crash recovery. btr_copy_externally_stored_field_prefix(): Return 0 if the BLOB has been half-deleted. row_upd_ext_fetch(): Assert that the externally stored column exists. row_ext_cache_fill(): Allow btr_copy_externally_stored_field_prefix() to return 0. row_sel_sec_rec_is_for_blob(): Return FALSE if the BLOB has been half-deleted. This is correct, because the clustered index record would have been deleted or purged last, after any secondary index records referring to it had been deleted. |
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| .. | ||
| btr0btr.c | ||
| btr0cur.c | ||
| btr0pcur.c | ||
| btr0sea.c | ||