#include "univ.i"
#include "data0data.h"
#include "data0type.h"
#include "dict0dict.h"
#include "rem0rec.h"
#include "rem0cmp.ic"

Include dependency graph for rem0cmp.h:

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Macros
#define	cmp_dtuple_rec_with_match(tuple, rec, offsets, fields, bytes)

Functions
UNIV_INTERN ibool	cmp_cols_are_equal (const dict_col_t col1, const dict_col_t col2, ibool check_charsets)
UNIV_INLINE int	cmp_data_data (ulint mtype, ulint prtype, const byte data1, ulint len1, const byte data2, ulint len2)
UNIV_INTERN int	cmp_data_data_slow (ulint mtype, ulint prtype, const byte data1, ulint len1, const byte data2, ulint len2)
UNIV_INTERN int	cmp_data_data_slow_varchar (const byte lhs, ulint lhs_len, const byte rhs, ulint rhs_len)
UNIV_INTERN int	cmp_data_data_slow_like_prefix (const byte data1, ulint len1, const byte data2, ulint len2)
UNIV_INTERN int	cmp_data_data_slow_like_suffix (const byte data1, ulint len1, const byte data2, ulint len2)
UNIV_INTERN int	cmp_data_data_slow_like_substr (const byte data1, ulint len1, const byte data2, ulint len2)
UNIV_INLINE int	cmp_dfield_dfield (const dfield_t dfield1, const dfield_t dfield2)
UNIV_INTERN int	cmp_dtuple_rec_with_match_low (const dtuple_t dtuple, const rec_t rec, const ulint offsets, ulint n_cmp, ulint matched_fields, ulint *matched_bytes))
UNIV_INTERN int	cmp_dtuple_rec (const dtuple_t dtuple, const rec_t rec, const ulint *offsets)
UNIV_INTERN ibool	cmp_dtuple_is_prefix_of_rec (const dtuple_t dtuple, const rec_t rec, const ulint *offsets)
UNIV_INTERN int	cmp_rec_rec_simple (const rec_t rec1, const rec_t rec2, const ulint offsets1, const ulint offsets2, const dict_index_t index, struct TABLE table)
UNIV_INTERN int	cmp_rec_rec_with_match (const rec_t rec1, const rec_t rec2, const ulint offsets1, const ulint offsets2, dict_index_t index, ibool nulls_unequal, ulint matched_fields, ulint *matched_bytes)
UNIV_INLINE int	cmp_rec_rec (const rec_t rec1, const rec_t rec2, const ulint offsets1, const ulint offsets2, dict_index_t *index)
UNIV_INTERN int	cmp_dfield_dfield_like_prefix (dfield_t dfield1, dfield_t dfield2)
UNIV_INLINE int	cmp_dfield_dfield_like_substr (dfield_t dfield1, dfield_t dfield2)
UNIV_INLINE int	cmp_dfield_dfield_like_suffix (dfield_t dfield1, dfield_t dfield2)

Variables
UNIV_INTERN int	warn_unused_result

Detailed Description

Comparison services for records

Created 7/1/1994 Heikki Tuuri

Macro Definition Documentation

#define cmp_dtuple_rec_with_match	(	tuple,
		rec,
		offsets,
		fields,
		bytes
	)

Value:

cmp_dtuple_rec_with_match_low( \

tuple,rec,offsets,dtuple_get_n_fields_cmp(tuple),fields,bytes)

Function Documentation

UNIV_INTERN ibool cmp_cols_are_equal	(	const dict_col_t *	col1,
		const dict_col_t *	col2,
		ibool	check_charsets
	)

Returns TRUE if two columns are equal for comparison purposes.

Returns: TRUE if the columns are considered equal in comparisons in: whether to check charsets

Parameters

col1	in: column 1
col2	in: column 2

UNIV_INLINE int cmp_data_data	(	ulint	mtype,
		ulint	prtype,
		const byte *	data1,
		ulint	len1,
		const byte *	data2,
		ulint	len2
	)

This function is used to compare two data fields for which we know the data type.

Returns: 1, 0, -1, if data1 is greater, equal, less than data2, respectively in: data field length or UNIV_SQL_NULL

This function is used to compare two data fields for which we know the data type.

Returns: 1, 0, -1, if data1 is greater, equal, less than data2, respectively

Parameters

mtype	in: main type
prtype	in: precise type
data1	in: data field (== a pointer to a memory buffer)
len1	in: data field length or UNIV_SQL_NULL
data2	in: data field (== a pointer to a memory buffer)
len2	in: data field length or UNIV_SQL_NULL

UNIV_INTERN int cmp_data_data_slow	(	ulint	mtype,
		ulint	prtype,
		const byte *	data1,
		ulint	len1,
		const byte *	data2,
		ulint	len2
	)

This function is used to compare two data fields for which we know the data type.

Returns: 1, 0, -1, if data1 is greater, equal, less than data2, respectively in: data field length or UNIV_SQL_NULL

Parameters

mtype	in: main type
prtype	in: precise type
data1	in: data field (== a pointer to a memory buffer)
len1	in: data field length or UNIV_SQL_NULL
data2	in: data field (== a pointer to a memory buffer)

UNIV_INLINE int cmp_dfield_dfield	(	const dfield_t *	dfield1,
		const dfield_t *	dfield2
	)

This function is used to compare two dfields where at least the first has its data type field set.

Returns: 1, 0, -1, if dfield1 is greater, equal, less than dfield2, respectively in: data field

This function is used to compare two dfields where at least the first has its data type field set.

Returns: 1, 0, -1, if dfield1 is greater, equal, less than dfield2, respectively

Parameters

dfield1	in: data field; must have type field set
dfield2	in: data field

UNIV_INTERN ibool cmp_dtuple_is_prefix_of_rec	(	const dtuple_t *	dtuple,
		const rec_t *	rec,
		const ulint *	offsets
	)

Checks if a dtuple is a prefix of a record. The last field in dtuple is allowed to be a prefix of the corresponding field in the record.

Returns: TRUE if prefix in: array returned by rec_get_offsets()

Parameters

dtuple	in: data tuple
rec	in: physical record

UNIV_INTERN int cmp_dtuple_rec	(	const dtuple_t *	dtuple,
		const rec_t *	rec,
		const ulint *	offsets
	)

Compares a data tuple to a physical record.

See Also: cmp_dtuple_rec_with_match

Returns: 1, 0, -1, if dtuple is greater, equal, less than rec, respectively in: array returned by rec_get_offsets()

Parameters

dtuple	in: data tuple
rec	in: physical record

UNIV_INTERN int cmp_dtuple_rec_with_match_low	(	const dtuple_t *	dtuple,
		const rec_t *	rec,
		const ulint *	offsets,
		ulint	n_cmp,
		ulint *	matched_fields,
		ulint *	matched_bytes
	)

This function is used to compare a data tuple to a physical record. Only dtuple->n_fields_cmp first fields are taken into account for the data tuple! If we denote by n = n_fields_cmp, then rec must have either m >= n fields, or it must differ from dtuple in some of the m fields rec has. If rec has an externally stored field we do not compare it but return with value 0 if such a comparison should be made.

Returns: 1, 0, -1, if dtuple is greater, equal, less than rec, respectively, when only the common first fields are compared, or until the first externally stored field in rec

Parameters

dtuple	in: data tuple
rec	in: physical record which differs from dtuple in some of the common fields, or which has an equal number or more fields than dtuple
offsets	in: array returned by rec_get_offsets()
n_cmp	in: number of fields to compare
matched_fields	in/out: number of already completely matched fields; when function returns, contains the value for current comparison
matched_bytes	in/out: number of already matched bytes within the first field not completely matched; when function returns, contains the value for current comparison

UNIV_INLINE int cmp_rec_rec	(	const rec_t *	rec1,
		const rec_t *	rec2,
		const ulint *	offsets1,
		const ulint *	offsets2,
		dict_index_t *	index
	)

This function is used to compare two physical records. Only the common first fields are compared.

Returns: 1, 0 , -1 if rec1 is greater, equal, less, respectively, than rec2; only the common first fields are compared in: data dictionary index

This function is used to compare two physical records. Only the common first fields are compared.

Returns: 1, 0 , -1 if rec1 is greater, equal, less, respectively, than rec2; only the common first fields are compared

Parameters

rec1	in: physical record
rec2	in: physical record
offsets1	in: rec_get_offsets(rec1, index)
offsets2	in: rec_get_offsets(rec2, index)
index	in: data dictionary index

UNIV_INTERN int cmp_rec_rec_simple	(	const rec_t *	rec1,
		const rec_t *	rec2,
		const ulint *	offsets1,
		const ulint *	offsets2,
		const dict_index_t *	index,
		struct TABLE *	table
	)

Compare two physical records that contain the same number of columns, none of which are stored externally.

Return values

1	if rec1 (including non-ordering columns) is greater than rec2
-1	if rec1 (including non-ordering columns) is less than rec2
0	if rec1 is a duplicate of rec2

Parameters

rec1	in: physical record
rec2	in: physical record
offsets1	in: rec_get_offsets(rec1, ...)
offsets2	in: rec_get_offsets(rec2, ...)
index	in: data dictionary index
table	in: MySQL table, for reporting duplicate key value if applicable, or NULL

UNIV_INTERN int cmp_rec_rec_with_match	(	const rec_t *	rec1,
		const rec_t *	rec2,
		const ulint *	offsets1,
		const ulint *	offsets2,
		dict_index_t *	index,
		ibool	nulls_unequal,
		ulint *	matched_fields,
		ulint *	matched_bytes
	)

This function is used to compare two physical records. Only the common first fields are compared, and if an externally stored field is encountered, then 0 is returned.

Returns: 1, 0, -1 if rec1 is greater, equal, less, respectively in/out: number of already matched bytes within the first field not completely matched; when the function returns, contains the value for the current comparison

Parameters

rec1	in: physical record
rec2	in: physical record
offsets1	in: rec_get_offsets(rec1, index)
offsets2	in: rec_get_offsets(rec2, index)
index	in: data dictionary index
matched_fields	in/out: number of already completely matched fields; when the function returns, contains the value the for current comparison

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation