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f3f76d249a
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.
248 lines
8.4 KiB
C
248 lines
8.4 KiB
C
/******************************************************
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Compressed page interface
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(c) 2005 Innobase Oy
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Created June 2005 by Marko Makela
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*******************************************************/
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#ifndef page0zip_h
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#define page0zip_h
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#ifdef UNIV_MATERIALIZE
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# undef UNIV_INLINE
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# define UNIV_INLINE
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#endif
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#include "mtr0types.h"
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#include "page0types.h"
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#include "dict0types.h"
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#include "ut0byte.h"
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/**************************************************************************
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Initialize a compressed page descriptor. */
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UNIV_INLINE
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void
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page_zip_des_init(
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/*==============*/
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page_zip_des_t* page_zip); /* in/out: compressed page
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descriptor */
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/**************************************************************************
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Compress a page. */
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ibool
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page_zip_compress(
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/*==============*/
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/* out: TRUE on success, FALSE on failure;
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page_zip will be left intact on failure. */
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page_zip_des_t* page_zip,/* in: size; out: data, n_blobs,
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m_start, m_end */
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const page_t* page, /* in: uncompressed page */
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dict_index_t* index, /* in: index of the B-tree node */
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mtr_t* mtr) /* in: mini-transaction handle,
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or NULL if no logging is needed */
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__attribute__((nonnull(1,2,3)));
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/**************************************************************************
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Decompress a page. This function should tolerate errors on the compressed
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page. Instead of letting assertions fail, it will return FALSE if an
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inconsistency is detected. */
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ibool
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page_zip_decompress(
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/*================*/
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/* out: TRUE on success, FALSE on failure */
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page_zip_des_t* page_zip,/* in: data, size;
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out: m_start, m_end, n_blobs */
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page_t* page, /* out: uncompressed page, may be trashed */
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mtr_t* mtr) /* in: mini-transaction handle,
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or NULL if no logging is needed */
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__attribute__((warn_unused_result, nonnull(1, 2)));
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#ifdef UNIV_DEBUG
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/**************************************************************************
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Validate a compressed page descriptor. */
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UNIV_INLINE
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ibool
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page_zip_simple_validate(
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/*=====================*/
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/* out: TRUE if ok */
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const page_zip_des_t* page_zip); /* in: compressed page
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descriptor */
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#endif /* UNIV_DEBUG */
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#if defined UNIV_DEBUG || defined UNIV_ZIP_DEBUG
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/**************************************************************************
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Check that the compressed and decompressed pages match. */
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ibool
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page_zip_validate(
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/*==============*/
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const page_zip_des_t* page_zip,/* in: compressed page */
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const page_t* page) /* in: uncompressed page */
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__attribute__((nonnull));
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#endif /* UNIV_DEBUG || UNIV_ZIP_DEBUG */
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/**************************************************************************
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Ensure that enough space is available in the modification log.
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If not, try to compress the page. */
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UNIV_INLINE
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ibool
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page_zip_alloc(
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/*===========*/
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/* out: TRUE if enough space is available */
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page_zip_des_t* page_zip,/* in/out: compressed page;
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will only be modified if compression is needed
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and successful */
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const page_t* page, /* in: uncompressed page */
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dict_index_t* index, /* in: index of the B-tree node */
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mtr_t* mtr, /* in: mini-transaction handle,
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or NULL if no logging is desired */
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ulint length, /* in: combined size of the record */
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ulint create) /* in: nonzero=add the record to the heap */
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__attribute__((warn_unused_result, nonnull(1,2,3)));
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/**************************************************************************
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Write an entire record on the compressed page. The data must already
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have been written to the uncompressed page. */
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void
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page_zip_write_rec(
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/*===============*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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const byte* rec, /* in: record being written */
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dict_index_t* index, /* in: the index the record belongs to */
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const ulint* offsets,/* in: rec_get_offsets(rec, index) */
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ulint create) /* in: nonzero=insert, zero=update */
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__attribute__((nonnull));
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/**************************************************************************
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Write the BLOB pointer of a record on the leaf page of a clustered index.
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The information must already have been updated on the uncompressed page. */
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void
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page_zip_write_blob_ptr(
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/*====================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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const byte* rec, /* in/out: record whose data is being
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written */
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dict_index_t* index, /* in: index of the page */
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const ulint* offsets,/* in: rec_get_offsets(rec, index) */
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ulint n, /* in: column index */
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mtr_t* mtr) /* in: mini-transaction handle,
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or NULL if no logging is needed */
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__attribute__((nonnull(1,2,3,4)));
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/**************************************************************************
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Write the node pointer of a record on a non-leaf compressed page. */
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void
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page_zip_write_node_ptr(
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/*====================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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byte* rec, /* in/out: record */
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ulint size, /* in: data size of rec */
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ulint ptr, /* in: node pointer */
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mtr_t* mtr) /* in: mini-transaction, or NULL */
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__attribute__((nonnull(1,2)));
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/**************************************************************************
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Write the trx_id and roll_ptr of a record on a B-tree leaf node page. */
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void
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page_zip_write_trx_id_and_roll_ptr(
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/*===============================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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byte* rec, /* in/out: record */
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const ulint* offsets,/* in: rec_get_offsets(rec, index) */
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ulint trx_id_col,/* in: column number of TRX_ID in rec */
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dulint trx_id, /* in: transaction identifier */
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dulint roll_ptr)/* in: roll_ptr */
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__attribute__((nonnull));
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/**************************************************************************
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Populate the dense page directory on the compressed page
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from the sparse directory on the uncompressed row_format=compact page. */
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void
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page_zip_dir_rewrite(
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/*=================*/
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page_zip_des_t* page_zip,/* out: dense directory on compressed page */
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const page_t* page) /* in: uncompressed page */
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__attribute__((nonnull));
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/**************************************************************************
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Write the "deleted" flag of a record on a compressed page. The flag must
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already have been written on the uncompressed page. */
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void
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page_zip_rec_set_deleted(
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/*=====================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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const byte* rec, /* in: record on the uncompressed page */
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ulint flag) /* in: the deleted flag (nonzero=TRUE) */
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__attribute__((nonnull));
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/**************************************************************************
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Write the "owned" flag of a record on a compressed page. The n_owned field
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must already have been written on the uncompressed page. */
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void
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page_zip_rec_set_owned(
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/*===================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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const byte* rec, /* in: record on the uncompressed page */
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ulint flag) /* in: the owned flag (nonzero=TRUE) */
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__attribute__((nonnull));
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/**************************************************************************
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Shift the dense page directory and the array of BLOB pointers
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when a record is deleted. */
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void
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page_zip_dir_delete(
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/*================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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byte* rec, /* in: deleted record */
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dict_index_t* index, /* in: index of rec */
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const ulint* offsets,/* in: rec_get_offsets(rec) */
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const byte* free) /* in: previous start of the free list */
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__attribute__((nonnull(1,2,3,4)));
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/**************************************************************************
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Add a slot to the dense page directory. */
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void
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page_zip_dir_add_slot(
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/*==================*/
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page_zip_des_t* page_zip, /* in/out: compressed page */
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ulint is_clustered) /* in: nonzero for clustered index,
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zero for others */
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__attribute__((nonnull));
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/**************************************************************************
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Write data to the uncompressed header portion of a page. The data must
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already have been written to the uncompressed page.
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However, the data portion of the uncompressed page may differ from
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the compressed page when a record is being inserted in
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page_cur_insert_rec_low(). */
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UNIV_INLINE
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void
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page_zip_write_header(
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/*==================*/
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page_zip_des_t* page_zip,/* in/out: compressed page */
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const byte* str, /* in: address on the uncompressed page */
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ulint length, /* in: length of the data */
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mtr_t* mtr) /* in: mini-transaction, or NULL */
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__attribute__((nonnull(1,2)));
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#ifdef UNIV_MATERIALIZE
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# undef UNIV_INLINE
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# define UNIV_INLINE UNIV_INLINE_ORIGINAL
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#endif
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#ifndef UNIV_NONINL
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# include "page0zip.ic"
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#endif
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#endif /* page0zip_h */
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