page_zip_dir_delete() will need to handle BLOBs.
rec_set_field_extern_bits(), rec_set_field_extern_bits_new():
Add parameter offsets.
rec_offs_set_nth_extern(): New function to set an extern bit in offsets.
This will be called when an extern bit is set in a record.
page_cur_rec_insert(), page_cur_insert_rec_low(): Document that the
parameter "offsets" is in/out.
page_zip_dir_delete(): Note that the array of BLOB pointers will need
to be shifted.
page0zip.ic: Document the entry type for clearing a record.
page_zip_available(): Add parameter "index". Remove parameters
"is_leaf" and "is_clustered".
page_zip_get_trailer_len(): New function for computing the trailer length
of the compressed page.
page_zip_apply_log(): Implement the modification log entry type for
clearing the data bytes of a record.
page_zip_decompress(): Initialize n_blobs when actually copying the
BLOB pointers to place.
page_zip_validate(): Add diagnostic messages for failures. Check
also m_start, m_end, and n_blobs.
page_zip_write_blob_ptr(): Add page_zip_validate() assertion.
There are still some bugs in the code.
btr_store_big_rec_extern_fields(): Remove assertion on dict_table_is_zip()
to ease testing.
btr_free_externally_stored_field(): Test page_zip instead of
dict_table_is_zip().
page_zip_write_rec(): Add parameter "create". Try to handle externally
stored columns.
rec_offs_any_extern(): Correct the function comment.
Add rec_offs_n_extern() and page_zip_get_n_prev_extern().
page_zip_dir_decode(): Replace assertion with if (...) return(FALSE).
page_zip_decompress(): Do not clear page_zip->n_blobs after counting the
BLOBs.
page_zip_write_blob_ptr(): Use page_zip_get_n_prev_extern().
Correct an off-by-one error in memcpy().
compressed pages.
btr_root_raise_and_insert(): Distinguish root_page_zip and new_page_zip.
btr_cur_set_ownership_of_extern_field(): Do not log the write on the
uncompressed page if it will be logged for page_zip.
lock_rec_insert_check_and_lock(), lock_sec_rec_modify_check_and_lock():
Update the max_trx_id field also on the compressed page.
mlog_write_ulint(): Add UNIV_UNLIKELY hints. Remove trailing white space.
mlog_log_string(): Remove trailing white space.
rec_set_field_extern_bits(): Remove parameter mtr, as the write will either
occur in the heap, or it will be logged at a higher level.
recv_parse_or_apply_log_rec_body(),
page_zip_write_header(): Add log record type MLOG_ZIP_WRITE_HEADER.
page_header_set_field(): Pass mtr=NULL to page_zip_write_header().
page_header_reset_last_insert(): Pass mtr to page_zip_write_header().
btr_page_set_index_id(), btr_page_set_level(),
btr_page_set_next(), btr_page_set_prev(): Pass mtr to page_zip_write_header().
row_upd_rec_sys_fields(): Pass mtr=NULL to page_zip_write_trx_id() and
page_zip_write_roll_ptr(), since the write will be logged at a higher level.
page_zip_write_header(): Add parameter mtr.
page_zip_write_header_log(): New function.
Remove rec_set_nth_field_extern_bit().
Make rec_set_nth_field_extern_bit_old() static.
Rename rec_set_nth_field_extern_bit_new()
to rec_set_field_extern_bits_new() and make it static.
row_ins_index_entry_low(): Remove bogus TODO comment.
BLOB pointers, trx_id, and roll_ptr.
btr_empty(), btr_create(), page_create(): Add parameter "index", as some
index information will be encoded on the compressed page.
Define REC_NODE_PTR_SIZE as 4.
Allow btr_page_reorganize() and btr_page_reorganize_low() to fail.
Define the error code DB_ZIP_OVERFLOW.
Make row_ins_index_entry_low() static.
page0zip: Encode the index, log reorganized records, and store uncompressed
fields separately from the compressed data stream.
