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91 lines
3.2 KiB
Text
91 lines
3.2 KiB
Text
/*****************************************************************************
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Copyright (c) 1994, 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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/*******************************************************************//**
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@file include/rem0cmp.ic
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Comparison services for records
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Created 7/1/1994 Heikki Tuuri
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************************************************************************/
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/*************************************************************//**
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This function is used to compare two data fields for which we know the
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data type.
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@return 1, 0, -1, if data1 is greater, equal, less than data2, respectively */
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UNIV_INLINE
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int
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cmp_data_data(
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/*==========*/
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ulint mtype, /*!< in: main type */
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ulint prtype, /*!< in: precise type */
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const byte* data1, /*!< in: data field (== a pointer to a memory
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buffer) */
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ulint len1, /*!< in: data field length or UNIV_SQL_NULL */
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const byte* data2, /*!< in: data field (== a pointer to a memory
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buffer) */
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ulint len2) /*!< in: data field length or UNIV_SQL_NULL */
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{
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return(cmp_data_data_slow(mtype, prtype, data1, len1, data2, len2));
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}
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/*************************************************************//**
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This function is used to compare two dfields where at least the first
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has its data type field set.
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@return 1, 0, -1, if dfield1 is greater, equal, less than dfield2,
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respectively */
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UNIV_INLINE
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int
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cmp_dfield_dfield(
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/*==============*/
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const dfield_t* dfield1,/*!< in: data field; must have type field set */
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const dfield_t* dfield2)/*!< in: data field */
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{
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const dtype_t* type;
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ut_ad(dfield_check_typed(dfield1));
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type = dfield_get_type(dfield1);
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return(cmp_data_data(type->mtype, type->prtype,
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(const byte*) dfield_get_data(dfield1),
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dfield_get_len(dfield1),
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(const byte*) dfield_get_data(dfield2),
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dfield_get_len(dfield2)));
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}
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/*************************************************************//**
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This function is used to compare two physical records. Only the common
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first fields are compared.
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@return 1, 0 , -1 if rec1 is greater, equal, less, respectively, than
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rec2; only the common first fields are compared */
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UNIV_INLINE
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int
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cmp_rec_rec(
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/*========*/
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const rec_t* rec1, /*!< in: physical record */
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const rec_t* rec2, /*!< in: physical record */
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const ulint* offsets1,/*!< in: rec_get_offsets(rec1, index) */
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const ulint* offsets2,/*!< in: rec_get_offsets(rec2, index) */
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dict_index_t* index) /*!< in: data dictionary index */
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{
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ulint match_f = 0;
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ulint match_b = 0;
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return(cmp_rec_rec_with_match(rec1, rec2, offsets1, offsets2, index,
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&match_f, &match_b, 0));
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}
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