data0data.cc File Reference

#include "data0data.h"
#include "rem0rec.h"
#include "rem0cmp.h"
#include "page0page.h"
#include "page0zip.h"
#include "dict0dict.h"
#include "btr0cur.h"
#include <ctype.h>

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Functions
UNIV_INTERN int	dtuple_coll_cmp (const dtuple_t *tuple1, const dtuple_t *tuple2)
UNIV_INTERN void	dtuple_set_n_fields (dtuple_t *tuple, ulint n_fields)
UNIV_INTERN ibool	dtuple_check_typed_no_assert (const dtuple_t *tuple)
UNIV_INTERN void	dfield_print (const dfield_t *dfield)
UNIV_INTERN void	dfield_print_also_hex (const dfield_t *dfield)
UNIV_INTERN void	dtuple_print (FILE *f, const dtuple_t *tuple)
UNIV_INTERN big_rec_t *	dtuple_convert_big_rec (dict_index_t *index, dtuple_t *entry, ulint *n_ext)
UNIV_INTERN void	dtuple_convert_back_big_rec (dict_index_t *index __attribute__((unused)), dtuple_t *entry, big_rec_t *vector)

Detailed Description

SQL data field and tuple

Created 5/30/1994 Heikki Tuuri

Definition in file data0data.cc.

Function Documentation

UNIV_INTERN void dfield_print

(

const dfield_t *

dfield

)

Pretty prints a dfield value according to its data type.

Parameters

dfield

in: dfield

Definition at line 278 of file data0data.cc.

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UNIV_INTERN void dfield_print_also_hex

(

const dfield_t *

dfield

)

Pretty prints a dfield value according to its data type. Also the hex string is printed if a string contains non-printable characters.

Parameters

dfield

in: dfield

Definition at line 321 of file data0data.cc.

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UNIV_INTERN ibool dtuple_check_typed_no_assert

(

const dtuple_t *

tuple

)

Checks that a data tuple is typed.

Returns

TRUE if ok

Parameters

tuple

in: tuple

Definition at line 141 of file data0data.cc.

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UNIV_INTERN int dtuple_coll_cmp	(	const dtuple_t *	tuple1,
		const dtuple_t *	tuple2
	)

Compare two data tuples, respecting the collation of character fields.

Returns

1, 0 , -1 if tuple1 is greater, equal, less, respectively, than tuple2

Parameters

tuple1	in: tuple 1
tuple2	in: tuple 2

Definition at line 62 of file data0data.cc.

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UNIV_INTERN void dtuple_convert_back_big_rec	(	dict_index_t *index	__attribute__(unused),
		dtuple_t *	entry,
		big_rec_t *	vector
	)

Puts back to entry the data stored in vector. Note that to ensure the fields in entry can accommodate the data, vector must have been created from entry with dtuple_convert_big_rec.

Parameters

__attribute__	in: index
entry	in: entry whose data was put to vector
vector	in, own: big rec vector; it is freed in this function

Definition at line 716 of file data0data.cc.

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UNIV_INTERN big_rec_t* dtuple_convert_big_rec	(	dict_index_t *	index,
		dtuple_t *	entry,
		ulint *	n_ext
	)

Moves parts of long fields in entry to the big record vector so that the size of tuple drops below the maximum record size allowed in the database. Moves data only from those fields which are not necessary to determine uniquely the insertion place of the tuple in the index.

Returns

own: created big record vector, NULL if we are not able to shorten the entry enough, i.e., if there are too many fixed-length or short fields in entry or the index is clustered

Parameters

index	in: index
entry	in/out: index entry
n_ext	in/out: number of externally stored columns

Definition at line 539 of file data0data.cc.

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UNIV_INTERN void dtuple_print	(	FILE *	f,
		const dtuple_t *	tuple
	)

The following function prints the contents of a tuple.

Parameters

f	in: output stream
tuple	in: tuple

Definition at line 505 of file data0data.cc.

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UNIV_INTERN void dtuple_set_n_fields	(	dtuple_t *	tuple,
		ulint	n_fields
	)

Sets number of fields used in a tuple. Normally this is set in dtuple_create, but if you want later to set it smaller, you can use this.

Parameters

tuple	in: tuple
n_fields	in: number of fields

Definition at line 103 of file data0data.cc.

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