rem0cmp.ic File Reference

This graph shows which files directly or indirectly include this file:

Functions
UNIV_INLINE int	cmp_data_data (ulint mtype, ulint prtype, const byte *data1, ulint len1, const byte *data2, ulint len2)
UNIV_INLINE int	cmp_data_data_like_prefix (byte *data1, ulint len1, byte *data2, ulint len2)
UNIV_INLINE int	cmp_data_data_like_suffix (byte *data1, ulint len1, byte *data2, ulint len2)
UNIV_INLINE int	cmp_data_data_like_substr (byte *data1, ulint len1, byte *data2, ulint len2)
UNIV_INLINE int	cmp_dfield_dfield (const dfield_t *dfield1, const dfield_t *dfield2)
UNIV_INLINE int	cmp_dfield_dfield_like_suffix (dfield_t *dfield1, dfield_t *dfield2)
UNIV_INLINE int	cmp_dfield_dfield_like_substr (dfield_t *dfield1, dfield_t *dfield2)
UNIV_INLINE int	cmp_rec_rec (const rec_t *rec1, const rec_t *rec2, const ulint *offsets1, const ulint *offsets2, dict_index_t *index)

Detailed Description

Comparison services for records

Created 7/1/1994 Heikki Tuuri

Function Documentation

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

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_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

Parameters

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

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

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