of non-clustered indexes. On these pages, only the bytes rec[-5..-1]
will be omitted from the compressed data stream. Save time by not looking
for trx_id or externally stored columns.
externally stored columns. Make some use of the fact in compression and
decompression.
rec_init_offsets(): Add ut_ad(dict_index_is_clust(index)) before flagging
external columns.
page_zip_get_trailer_len(): Assert ut_ad(!page_zip->n_blobs) unless
dict_index_is_clust(index).
page_zip_get_n_prev_extern(): Add ut_ad(dict_index_is_clust(index)).
page_zip_compress(), page_zip_decompress_low(): Add dict_index_is_clust()
assertions. Allow completely external storage of columns. Simplify
the computation of "externs".
page_zip_write_rec(): Store leaf node records of non-clustered indexes
with one memcpy(), avoiding rec_offs_n_extern() and the for loop.
page_zip_write_blob_ptr(): Add ut_ad(dict_index_is_clust(index)).
Simplify the computation of "externs".
page_zip_clear_rec(): Only attempt to zero out BLOB pointers when
the record belongs to a leaf page of a clustered index.
page_zip_dir_delete(): Take a fast path when the record is
not on a leaf page of a clustered index.
Simplify the computation of "externs".
page_zip_copy(): Assert that n_blobs is zero on anything else than
leaf pages of clustered indexes.
with page_zip_dir_insert(). Pass page_zip to rec_set_n_owned_new()
and page_dir_slot_set_n_owned().
page_zip_dir_insert(): New function. Shift the dense page directory and
write the inserted record there.
data0data.c: Add #include "page0zip.h" that was forgotten from r739.
page_cur_insert_rec_low(): Remove a memory leak when preventing
extra_size to grow.
initial decompression, in case the record will be deleted and the
space will be reused by a smaller record.
page_zip_clear_rec_disable: Note the possibility of a page_zip_validate()
failure when the space of a deleted record is reused by a smaller record.
stored columns.
page_zip_decompress(): We indeed need to clear the BLOB pointers of deleted
records twice. This implies that we also need to invoke rec_get_offsets()
twice for each record on a leaf page. Add clarifying comments.
page_zip_clear_rec(): Add the flag page_zip_clear_rec_disable for
disabling the clearing of deleted records.
page_zip_compress_write_log(): Do not invoke page_zip_validate(), since
this is a static function and the callers already invoke page_zip_validate().
page_zip_decompress_low(): Clear the page #ifdef UNIV_ZIP_DEBUG.
Optimizations: Remove local variable "last". Do not clear the BLOB
pointer until the modification log has been applied. (Since r690,
it will be cleared after applying the modification log.)
Avoid calling rec_get_offsets() a second time if there are no
uncompressed columns to be restored.
dict_load_table(): Initialize table->flags with zip_size.
mlog_parse_nbytes(), mlog_parse_string(): Add parameter page_zip and
write the changes also to the compressed page if one is specified.
Assert that these functions are not called on FIL_PAGE_INDEX pages.
buf_page_io_complete(): Replace block->frame with frame where appropriate.
recv_parse_or_apply_log_rec_body(): Add ut_a(!page_zip) where appropriate.
page_parse_delete_rec_list(): Add parameter page_zip.
page_zip_decompress(): Move the function body to page_zip_decompress_low(),
add the parameter do_validate() to enable page_validate() assertion. Wrap
page_zip_decompress_low() with do_validate=TRUE.
page_zip_validate(): Invoke page_zip_decompress_low() with do_validate=FALSE,
as page_validate() may fail when the compressed page is being updated
in-place.
page_dir_slot_check(): Replace buf_frame_align() with ut_align_down()
in order to avoid an assertion failure in page_zip_validate(), which
will now invoke page_validate() via page_zip_decompress().
buf_page_io_complete(): On FIL_PAGE_TYPE_ZBLOB (compressed BLOB pages),
read the space_id from a different location.
page_zip_compress(), page_zip_write_rec(), page_zip_write_blob_ptr():
Replace page_simple_validate_new() with page_validate().
page_zip_clear_rec(): When running out of log space, do not attempt to
recompress the page, because the directory slots might be unbalanced and
the page_validate() assertion in page_zip_compress() would fail.
Instead, clear the BLOB pointers of the deleted record on the
uncompressed page, so that page_zip_validate() will succeed.
page_zip_validate(): Remove the comment about page_zip_clear_rec().
A mismatch always indicates a serious inconsistency.
buf_flush_init_for_writing(): On FIL_PAGE_TYPE_ZBLOB, write to
page_zip->data instead of page.
page_zip_write_rec(), page_zip_write_blob_ptr(), page_zip_write_node_ptr():
Add ut_ad(page_simple_validate_new()).
btr_rec_copy_externally_stored_field(): Add parameter zip_size.
Do not call buf_block_align(rec), because rec can also be in
dynamically allocated memory. buf_block_align() can only be invoked
on addresses inside the buffer pool.
page_zip_clear_rec(): Improve formatting.
ut_malloc() to avoid breaking the latching order.
page_rec_check(), page_dir_slot_get_rec(): Replace buf_frame_align()
with ut_align_down() to avoid assertion failures in page_zip_validate().
by running index_merge_ror_cpk on 1-kilobyte compressed pages.
page_delete_rec_list_start(): Remove the page_zip_validate() assertion.
btr_page_split_and_insert(): Add page_zip_validate() assertions about
page and new_page after moving the records.
with page_zip_available() in order to avoid an extra page_zip_compress().
page_zip_available(): Make the function public.
page0zip.ic: Sort the inline function declarations in order to avoid
forward references, which do not work on some compilers.
on B-tree index pages.
page_rec_set_next(): Assert that rec != next.
rec_get_next_ptr(), rec_get_next_offs(): On compact pages, assert that
there are at least REC_N_NEW_EXTRA_BYTES + 1 between records.
page_cur_insert_rec_write_log(): Replace a buf_frame_align() call
with ut_align_offset().
page_cur_insert_rec_low(): Assert that current_rec != insert_rec.
page_zip_reorganize() was invoked.
btr_compress(): Obtain orig_pred and orig_succ after copying the records.
Add a debug assertion about FIL_PAGE_PREV.
page_copy_rec_list_end(), page_copy_rec_list_start(): Change the return
type from ibool to rec_t. Adjust the return value after invoking
page_zip_reorganize().
page_zip_assertion() failure in page_copy_rec_list_end().
btr_root_raise_and_insert(), btr_lift_page_up(), btr_compress():
Add page_zip_validate() assertions.
btr_compress(): Only copy FIL_PAGE_PREV when UNIV_BTR_DEBUG is defined.
page_cur_delete_rec(): Document why the page_zip_validate() assertion
was removed.
page_copy_rec_list_end(): Remove the page_zip_validate() assertion and
document why.
page_move_rec_list_end(): Add page_zip_validate() assertion.
page_cur_delete_rec(): Do not call page_zip_validate() in the beginning,
because btr_set_min_rec_mark() in btr_cur_pessimistic_delete() will
cause a temporary mismatch.
Document temporary mismatches caused by btr_set_min_rec_mark() calls
and explain why they will not cause any problems.
os_aio_simulated_handle(): Temporarily disable os_file_check_page_trailers(),
which cannot be invoked on compressed pages.
dict_table_add_system_columns(): New function, split from
dict_table_add_to_cache().
mlog_parse_index(): Add system columns to the dummy table and identify
DB_TRX_ID and DB_ROLL_PTR in the dummy index.
buf_LRU_get_free_block(): Note that page_zip->data should be allocated from
an aligned memory pool.
buf_flush_buffered_writes(): Write compressed pages to disk.
buf_flush_post_to_doublewrite_buf(): Copy compressed pages to the
doublewrite buffer. Zero fill any excess space.
buf_flush_init_for_writing(): Treat all compressed pages the same.
buf_read_page_low(): Read compressed pages from disk.
buf_page_io_complete(): Process compressed pages.
trx_sys_doublewrite_init_or_restore_page(): Process compressed pages.
mlog_write_initial_log_record_fast(): Enable a debug printout
#ifdef UNIV_LOG_DEBUG.
fsp_header_init(), fsp_fill_free_list(): Pass the compressed page size
to buf_page_create().
page_zip_compress_write_log(): Flatten the if-else if-else logic.
page_zip_parse_write_blob_ptr(): Do not test page_zip if page==NULL.
page_zip_parse_write_node_ptr(): Do not test page_zip if page==NULL.
Invoke mlog_close() correctly.
row_sel_store_row_id_to_prebuilt(): Add UNIV_UNLIKELY hint to an
assertion-like test.
page_zip_compress_write_log(): Make static.
page_zip_compress(): Add optional parameter mtr for redo logging.
page_zip_reorganize(): Low-level counterpart of btr_page_reorganize().
page_zip_copy(): Add debug assertions about mtr_memo_contains.
page_cur_insert_rec_low(): Try page_zip_reorganize() and seek to the
new position of insert_rec if it succeeds.
page_copy_rec_list_end(), page_copy_rec_list_start():
Try page_zip_reorganize().
page_move_rec_list_end(): Remove bogus comment.
page_zip_copy(), page_zip_compress_write_log(): Add parameter 'index'.
page_zip_parse_write_header(): Check for !page_zip only if page != NULL.
page_zip_compress_write_log(), page_zip_parse_compress(): Omit some
fields in the page header. Omit the unused bytes between the modification
log and the page trailer.
parse_or_apply_log_rec_body(): Remove a bogus debug assertion.
page_move_rec_list_start() and page_move_rec_list_end(). Relax the
conditions on insert_will_fit if page_zip is set.
page_delete_rec_list_start(): Make public.
page_zip_copy(): Clear REC_INFO_MIN_REC_FLAG if FIL_PAGE_PREV != FIL_NULL.
btr_validate_level(): Add missing parameter to added buf_page_print() calls.
btr_root_raise_and_insert(): Replace low-level code with page_zip_copy().
page_zip_copy(): New function to copy the data payload of a compressed page,
byte for byte. The file page header and trailer are not copied, to avoid
overwriting the fields FIL_PAGE_OFFSET, FIL_PAGE_PREV and FIL_PAGE_NEXT.
btr_cur_compress_if_useful(): Replace if () return(); return() with return.
page_rec_get_next_low(): New function.
page_rec_get_prev(): Invoke page_is_comp() outside the loop.
Replace page_rec_get_next() with loop-specific instances of
page_rec_get_next_low().
page_copy_rec_list_end(): Add some debug assertions.
btr_root_raise_and_insert(): If page_copy_rec_list_end() fails,
copy the pages byte for byte.
page_zip_compress(): Ensure that the uncompressed storage area will
fit on the compressed page.
Introduce FIL_PAGE_ZBLOB_DATA as a synonym for FIL_PAGE_FILE_FLUSH_LSN.
btr_store_big_rec_extern_fields(): Make the assertion about
dict_table_zip_size() more accurate.
buf_LRU_get_free_block(), buf_block_alloc(): Add parameter zip_size.
buf_calc_zblob_page_checksum(): Remove. Replace with page_zip_calc_checksum().
buf_page_init(): Remove parameter zip_size.
buf_page_io_complete(): Add a placeholder for handling compressed pages.
trx_doublewrite_page_inside(): Remove redundant function.
page_zip_write_rec(): Relax an overly tight assertion about blob_no.
