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ee152b828f
of clustered indexes. Previously, parts of the code assumed that these columns would exist on all leaf pages. Simplify the update-in-place of these columns. Add inline function dict_index_is_clust() to replace all tests index->type & DICT_CLUSTERED. Remove the redo log entry types MLOG_ZIP_WRITE_TRX_ID and MLOG_ZIP_WRITE_ROLL_PTR, because the modifications to these columns are covered by logical logging. Fuse page_zip_write_trx_id() and page_zip_write_roll_ptr() into page_zip_write_trx_id_and_roll_ptr(). page_zip_dir_add_slot(), page_zip_available(): Add flag "is_clustered", so that no space will be reserved for TRX_ID and ROLL_PTR on leaf pages of secondary indexes. page_zip_apply_log(): Flag an error when val==0 is encoded with two bytes. page_zip_write_rec(): Add debug assertions that there is enough space available for the entry before copying the data bytes of the record.
83 lines
2.1 KiB
Text
83 lines
2.1 KiB
Text
/******************************************************
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The transaction lock system
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(c) 1996 Innobase Oy
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Created 5/7/1996 Heikki Tuuri
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*******************************************************/
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#include "sync0sync.h"
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#include "srv0srv.h"
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#include "dict0dict.h"
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#include "row0row.h"
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#include "trx0sys.h"
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#include "trx0trx.h"
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#include "buf0buf.h"
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#include "page0page.h"
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#include "page0cur.h"
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#include "row0vers.h"
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#include "que0que.h"
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#include "btr0cur.h"
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#include "read0read.h"
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#include "log0recv.h"
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/*************************************************************************
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Calculates the fold value of a page file address: used in inserting or
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searching for a lock in the hash table. */
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UNIV_INLINE
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ulint
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lock_rec_fold(
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/*==========*/
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/* out: folded value */
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ulint space, /* in: space */
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ulint page_no)/* in: page number */
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{
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return(ut_fold_ulint_pair(space, page_no));
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}
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/*************************************************************************
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Calculates the hash value of a page file address: used in inserting or
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searching for a lock in the hash table. */
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UNIV_INLINE
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ulint
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lock_rec_hash(
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/*==========*/
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/* out: hashed value */
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ulint space, /* in: space */
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ulint page_no)/* in: page number */
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{
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return(hash_calc_hash(lock_rec_fold(space, page_no),
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lock_sys->rec_hash));
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}
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/*************************************************************************
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Checks if some transaction has an implicit x-lock on a record in a clustered
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index. */
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UNIV_INLINE
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trx_t*
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lock_clust_rec_some_has_impl(
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/*=========================*/
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/* out: transaction which has the x-lock, or
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NULL */
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rec_t* rec, /* in: user record */
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dict_index_t* index, /* in: clustered index */
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const ulint* offsets)/* in: rec_get_offsets(rec, index) */
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{
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dulint trx_id;
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#ifdef UNIV_SYNC_DEBUG
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ut_ad(mutex_own(&kernel_mutex));
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#endif /* UNIV_SYNC_DEBUG */
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ut_ad(dict_index_is_clust(index));
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ut_ad(page_rec_is_user_rec(rec));
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trx_id = row_get_rec_trx_id(rec, index, offsets);
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if (trx_is_active(trx_id)) {
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/* The modifying or inserting transaction is active */
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return(trx_get_on_id(trx_id));
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}
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return(NULL);
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}
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