Add m_nonempty for facilitating the test in page_zip_alloc(). This
reduces the combined size of the bit-fields to 32 bits. Thus,
sizeof(page_zip_des_t) == 2 machine words on 32-bit and wider systems.
storage size from 16 to 3 bits.
page_zip_get_size(), page_zip_set_size(): New functions.
Replace direct references to page_zip_des_t:size with calls to
buf_block_get_zip_size(), page_zip_get_size(), and page_zip_set_size().
and uncompressed buffer pool pages.
buf_block_t: Replace page_zip, space, and offset with buf_page_t page.
Replace some integers with bit-fields.
enum buf_block_state: Rename to buf_page_state. Add BUF_BLOCK_ZIP_PAGE.
page_zip_des_t: Add the field "state". Make the integer fields bit-fields.
page_zip_copy(): Document which fields are copied.
Replace all page_t* parameters with buf_block_t*, and replace many
rec_t* parameters with heap_no. This eliminates also many
rec_get_heap_no() calls, which became more expensive with the
introduction of ROW_FORMAT=COMPACT in MySQL/InnoDB 5.0.3.
page_rec_get_heap_no(), lock_get_min_heap_no(): New functions.
page_set_max_trx_id(): Replace page_t* parameter with buf_block_t*,
to avoid a buf_block_align() call.
Replace some occurrences of page_get_page_no() with buf_block_get_page_no().
page_cur_delete_rec(): Replace buf_block_align() with page_cur_get_block().
btr_cur_t: Move page_block to page_cur_t::block.
page_cur_get_block(), page_cur_get_page_zip(): New functions.
page_cur_position(): Add parameter block.
Remove many page_zip parameters, now that there is page_cur_get_page_zip().
Replace some page, page_zip parameters with block.
Add some const qualifiers to function parameters and remove casts.
PAGE_HEAP_NO_INFIMUM, PAGE_HEAP_NO_SUPREMUM, PAGE_HEAP_NO_USER_LOW:
New constants.
Replace some cursor code in low-level diagnostic functions with
direct management of rec, because buf_block_t::buf_fix_count may be 0
when the functions are called, and debug assertions would fail.
accessors returning pointers with macros that preserve const qualifiers.
In UNIV_DEBUG builds, retain the accessors and cast away constness there.
dfield_get_type(), dfield_get_data(), dtuple_get_nth_field(),
dict_table_get_nth_col(), dict_table_get_sys_col(): Implement as macro
unless #ifdef UNIV_DEBUG.
rec_get_nth_field(): Replace with rec_get_nth_field_offs() that does not
do pointer arithmetics. Implement rec_get_nth_field() as a macro.
Replace ut_ad(mtr_memo_contains(mtr, buf_block_align(ptr), ...))
with ut_ad(mtr_memo_contains_page(mtr, ptr, ...)) in order to reduce the
number of buf_block_align() calls.
of externally stored columns, and fix bugs introduced in r873. (Bug #22496)
btr_page_get_sure_split_rec(), btr_page_insert_fits(),
rec_get_converted_size(), rec_convert_dtuple_to_rec(),
rec_convert_dtuple_to_rec_old(), rec_convert_dtuple_to_rec_new():
Add parameters ext and n_ext. Flag external fields during the
conversion.
rec_set_field_extern_bits(), rec_set_field_extern_bits_new(),
rec_offs_set_nth_extern(), rec_set_nth_field_extern_bit_old():
Remove. The bits are set by rec_convert_dtuple_to_rec().
page_cur_insert_rec_low(): Remove the parameters ext and n_ext.
btr_cur_add_ext(): New utility function for updating and sorting ext[].
Low-level functions now expect the array to be in ascending order
for performance reasons. Used in btr_cur_optimistic_insert(),
btr_cur_pessimistic_insert(), and btr_cur_pessimistic_update().
btr_cur_optimistic_insert(): Remove some defensive code, because we cannot
compute the added parameters of rec_get_converted_size().
btr_push_update_extern_fields(): Sort the array. Require the array to
be twice the maximum usage, so that ut_ulint_sort() can be used.
dtuple_convert_big_rec(): Allocate new space for the BLOB pointer,
to avoid overwriting prefix indexes to the same column. Adapt
dtuple_convert_back_big_rec().
row_build_index_entry(): Fetch the columns also for prefix indexes of
the clustered index.
page_zip_apply_log(), page_zip_decompress_clust(): Allow externally
stored fields to lack a locally stored part.
guaranteed free space available for inserting one record.
btr_page_get_sure_split_rec(), btr_cur_pessimistic_insert():
Use page_zip_empty_size().
btr_page_split_and_insert(): Relax a debug assertion that there should
be at least two user records on the page. On compressed pages, we may
be able to write only one record.
rec_convert_dtuple_to_rec_old(): Initialize the record in order to avoid
bogus Valgrind warnings about the ut_ad() in mach_write_to_1() and
mach_write_to_2().
page_zip_compress(), page_zip_write_rec(), page_zip_write_blob_ptr():
Replace ut_ad(page_validate(...)) with ut_ad(page_simple_validate_new(...)),
because otherwise crash recovery would fail.
on the ZIP_DUMMY index. Because it does not contain valid collation
information, the ordering check in page_validate() may fail on pages
containing non-binary data.
Instead, let the callers of page_zip_decompress() invoke page_validate()
when the index information is available.
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.
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.
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().
