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branches/zip: Improve the clearing of deleted records. Try to support

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operations on BLOB columns.  There are some bugs in the code, because
test-insert and a few other tests fail.

page_mem_free(): Add parameter index.  Decrement PAGE_N_RECS here.
Move some operations to page_zip_dir_delete().

page_zip_clear_rec(): Make this a static function.

page_zip_dir_delete(): Add parameters index and offsets.
Decrement PAGE_N_RECS and clear info_bits and n_owned.

page_zip_get_n_prev_extern(): Correct the synopsis and the algorithm.
Add parameter page_zip.  Search the records in heap_no order instead
of collation order.

page_zip_compress(), page_zip_decompress(): Only copy BLOB pointers
and increment n_blobs for records that have not been deleted.

page_zip_clear_rec(): Clear trx_id and roll_ptr on the compressed page.

page_zip_dir_delete(): Decrement PAGE_N_RECS.  Shift the array of
BLOB pointers.  Call page_zip_clear_rec().

page_zip_dir_add_slot(): Shift the array of BLOB pointers to make
space of roll_ptr and trx_id.

page_cur_delete_rec(): Do not decrement PAGE_N_RECS or call
page_zip_clear_rec(), as page_mem_free() already does it.
This commit is contained in:
marko
2006-03-16 14:02:22 +00:00
parent cd7583af1f
commit f137c03847
6 changed files with 199 additions and 130 deletions
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19
include/page0types.h
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@@ -53,19 +53,6 @@ page_zip_write(
ulint length) /* in: length of the data */
__attribute__((nonnull));
/**************************************************************************
Clear a record on the uncompressed and compressed page, if possible. */
void
page_zip_clear_rec(
/*===============*/
page_zip_des_t* page_zip,/* in/out: compressed page */
byte* rec, /* in: record to clear */
dict_index_t* index, /* in: index of rec */
const ulint* offsets,/* in: rec_get_offsets(rec, index) */
mtr_t* mtr) /* in: mini-transaction */
__attribute__((nonnull));
/**************************************************************************
Write data to the uncompressed header portion of a page. The data must
already have been written to the uncompressed page. */
@@ -110,9 +97,11 @@ void
page_zip_dir_delete(
/*================*/
page_zip_des_t* page_zip,/* in/out: compressed page */
const byte* rec, /* in: deleted record */
byte* rec, /* in: deleted record */
dict_index_t* index, /* in: index of rec */
const ulint* offsets,/* in: rec_get_offsets(rec) */
const byte* free) /* in: previous start of the free list */
__attribute__((nonnull(1,2)));
__attribute__((nonnull(1,2,3,4)));
/**************************************************************************
Add a slot to the dense page directory. */