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641.2.2
by Monty Taylor
InnoDB Plugin 1.0.3 |
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/*****************************************************************************
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Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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/******************************************************
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General row routines
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Created 4/20/1996 Heikki Tuuri
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*******************************************************/
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#include "dict0dict.h" |
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#include "rem0rec.h" |
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#include "trx0undo.h" |
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/*************************************************************************
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Reads the trx id field from a clustered index record. */
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UNIV_INLINE |
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dulint |
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row_get_rec_trx_id(
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/*===============*/
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/* out: value of the field */ |
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const rec_t* rec, /* in: 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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ulint offset; |
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ut_ad(dict_index_is_clust(index)); |
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ut_ad(rec_offs_validate(rec, index, offsets)); |
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offset = index->trx_id_offset; |
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if (!offset) { |
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offset = row_get_trx_id_offset(rec, index, offsets); |
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} |
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return(trx_read_trx_id(rec + offset)); |
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}
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/*************************************************************************
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Reads the roll pointer field from a clustered index record. */
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UNIV_INLINE |
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dulint |
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row_get_rec_roll_ptr(
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/*=================*/
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/* out: value of the field */ |
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const rec_t* rec, /* in: 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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ulint offset; |
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ut_ad(dict_index_is_clust(index)); |
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ut_ad(rec_offs_validate(rec, index, offsets)); |
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offset = index->trx_id_offset; |
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if (!offset) { |
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offset = row_get_trx_id_offset(rec, index, offsets); |
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} |
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return(trx_read_roll_ptr(rec + offset + DATA_TRX_ID_LEN)); |
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}
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/***********************************************************************
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Builds from a secondary index record a row reference with which we can
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search the clustered index record. */
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UNIV_INLINE |
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void |
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row_build_row_ref_fast(
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/*===================*/
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dtuple_t* ref, /* in/out: typed data tuple where the |
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reference is built */
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const ulint* map, /* in: array of field numbers in rec |
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telling how ref should be built from
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the fields of rec */
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const rec_t* rec, /* in: record in the index; must be |
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preserved while ref is used, as we do
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not copy field values to heap */
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const ulint* offsets)/* in: array returned by rec_get_offsets() */ |
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{
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dfield_t* dfield; |
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const byte* field; |
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ulint len; |
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ulint ref_len; |
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ulint field_no; |
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ulint i; |
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ut_ad(rec_offs_validate(rec, NULL, offsets)); |
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ut_ad(!rec_offs_any_extern(offsets)); |
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ref_len = dtuple_get_n_fields(ref); |
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for (i = 0; i < ref_len; i++) { |
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dfield = dtuple_get_nth_field(ref, i); |
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field_no = *(map + i); |
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if (field_no != ULINT_UNDEFINED) { |
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field = rec_get_nth_field(rec, offsets, |
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field_no, &len); |
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dfield_set_data(dfield, field, len); |
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} |
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} |
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}
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