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/*****************************************************************************
Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/*******************************************************************//**
@file include/rem0cmp.ic
Comparison services for records
Created 7/1/1994 Heikki Tuuri
************************************************************************/
/*************************************************************//**
This function is used to compare two data fields for which we know the
data type.
@return 1, 0, -1, if data1 is greater, equal, less than data2, respectively */
UNIV_INLINE
int
cmp_data_data(
/*==========*/
ulint mtype, /*!< in: main type */
ulint prtype, /*!< in: precise type */
const byte* data1, /*!< in: data field (== a pointer to a memory
buffer) */
ulint len1, /*!< in: data field length or UNIV_SQL_NULL */
const byte* data2, /*!< in: data field (== a pointer to a memory
buffer) */
ulint len2) /*!< in: data field length or UNIV_SQL_NULL */
{
return(cmp_data_data_slow(mtype, prtype, data1, len1, data2, len2));
}
/*****************************************************************
This function is used to compare two (CHAR) data fields for the LIKE
operator. */
UNIV_INLINE
int
cmp_data_data_like_prefix(
/*======================*/
/* out: 1, 0, -1, if data1 is greater, equal,
less than data2, respectively */
byte* data1, /* in: data field (== a pointer to a memory
buffer) */
ulint len1, /* in: data field length or UNIV_SQL_NULL */
byte* data2, /* in: data field (== a pointer to a memory
buffer) */
ulint len2) /* in: data field length or UNIV_SQL_NULL */
{
return(cmp_data_data_slow_like_prefix(data1, len1, data2, len2));
}
/*****************************************************************
This function is used to compare two (CHAR) data fields for the LIKE
operator. */
UNIV_INLINE
int
cmp_data_data_like_suffix(
/*======================*/
/* out: 1, 0, -1, if data1 is greater, equal,
less than data2, respectively */
byte* data1, /* in: data field (== a pointer to a memory
buffer) */
ulint len1, /* in: data field length or UNIV_SQL_NULL */
byte* data2, /* in: data field (== a pointer to a memory
buffer) */
ulint len2) /* in: data field length or UNIV_SQL_NULL */
{
return(cmp_data_data_slow_like_suffix(data1, len1, data2, len2));
}
/*****************************************************************
This function is used to compare two (CHAR) data fields for the LIKE
operator. */
UNIV_INLINE
int
cmp_data_data_like_substr(
/*======================*/
/* out: 1, 0, -1, if data1 is greater, equal,
less than data2, respectively */
byte* data1, /* in: data field (== a pointer to a memory
buffer) */
ulint len1, /* in: data field length or UNIV_SQL_NULL */
byte* data2, /* in: data field (== a pointer to a memory
buffer) */
ulint len2) /* in: data field length or UNIV_SQL_NULL */
{
return(cmp_data_data_slow_like_substr(data1, len1, data2, len2));
}
/*************************************************************//**
This function is used to compare two dfields where at least the first
has its data type field set.
@return 1, 0, -1, if dfield1 is greater, equal, less than dfield2,
respectively */
UNIV_INLINE
int
cmp_dfield_dfield(
/*==============*/
const dfield_t* dfield1,/*!< in: data field; must have type field set */
const dfield_t* dfield2)/*!< in: data field */
{
const dtype_t* type;
ut_ad(dfield_check_typed(dfield1));
type = dfield_get_type(dfield1);
return(cmp_data_data(type->mtype, type->prtype,
(const byte*) dfield_get_data(dfield1),
dfield_get_len(dfield1),
(const byte*) dfield_get_data(dfield2),
dfield_get_len(dfield2)));
}
/*****************************************************************
This function is used to compare two dfields where at least the first
has its data type field set. */
UNIV_INLINE
int
cmp_dfield_dfield_like_suffix(
/*==========================*/
/* out: 1, 0, -1, if dfield1 is greater, equal,
less than dfield2, respectively */
dfield_t* dfield1,/* in: data field; must have type field set */
dfield_t* dfield2)/* in: data field */
{
ut_ad(dfield_check_typed(dfield1));
return(cmp_data_data_like_suffix(
(byte*) dfield_get_data(dfield1),
dfield_get_len(dfield1),
(byte*) dfield_get_data(dfield2),
dfield_get_len(dfield2)));
}
/*****************************************************************
This function is used to compare two dfields where at least the first
has its data type field set. */
UNIV_INLINE
int
cmp_dfield_dfield_like_substr(
/*==========================*/
/* out: 1, 0, -1, if dfield1 is greater, equal,
less than dfield2, respectively */
dfield_t* dfield1,/* in: data field; must have type field set */
dfield_t* dfield2)/* in: data field */
{
ut_ad(dfield_check_typed(dfield1));
return(cmp_data_data_like_substr(
(byte*) dfield_get_data(dfield1),
dfield_get_len(dfield1),
(byte*) dfield_get_data(dfield2),
dfield_get_len(dfield2)));
}
/*************************************************************//**
This function is used to compare two physical records. Only the common
first fields are compared.
@return 1, 0 , -1 if rec1 is greater, equal, less, respectively, than
rec2; only the common first fields are compared */
UNIV_INLINE
int
cmp_rec_rec(
/*========*/
const rec_t* rec1, /*!< in: physical record */
const rec_t* rec2, /*!< in: physical record */
const ulint* offsets1,/*!< in: rec_get_offsets(rec1, index) */
const ulint* offsets2,/*!< in: rec_get_offsets(rec2, index) */
dict_index_t* index) /*!< in: data dictionary index */
{
ulint match_f = 0;
ulint match_b = 0;
return(cmp_rec_rec_with_match(rec1, rec2, offsets1, offsets2, index,
FALSE, &match_f, &match_b));
}
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