SQL data field and tuple. More...

#include "btr0types.h"
#include "mem0mem.h"

Functions
static dtype_t *	dfield_get_type (const dfield_t *field)
	Gets pointer to the type struct of SQL data field. More...

static void	dfield_set_type (dfield_t field, const dtype_t type)
	Sets the type struct of SQL data field. More...

static void *	dfield_get_data (const dfield_t *field)
	Gets pointer to the data in a field. More...

static uint32_t	dfield_get_len (const dfield_t *field)
	Gets length of field data. More...

static void	dfield_set_len (dfield_t *field, ulint len)
	Sets length in a field. More...

static ulint	dfield_is_null (const dfield_t *field)
	Determines if a field is SQL NULL. More...

static bool	dfield_is_ext (const dfield_t *field)
	Determines if a field is externally stored. More...

static void	dfield_set_ext (dfield_t *field)
	Sets the "external storage" flag. More...

static spatial_status_t	dfield_get_spatial_status (const dfield_t *field)
	Gets spatial status for "external storage". More...

static void	dfield_set_spatial_status (dfield_t *field, spatial_status_t spatial_status)
	Sets spatial status for "external storage". More...

static void	dfield_set_data (dfield_t field, const void data, ulint len)
	Sets pointer to the data and length in a field. More...

static void	dfield_write_mbr (dfield_t field, const double mbr)
	Sets pointer to the data and length in a field. More...

static void	dfield_set_null (dfield_t *field)
	Sets a data field to SQL NULL. More...

static void	dfield_copy_data (dfield_t field1, const dfield_t field2)
	Copies the data and len fields. More...

static void	dfield_copy (dfield_t field1, const dfield_t field2)
	Copies a data field to another. More...

static void	dfield_dup (dfield_t field, mem_heap_t heap)
	Copies the data pointed to by a data field. More...

static bool	dfield_is_multi_value (const dfield_t *field)

static void	dfield_multi_value_dup (dfield_t field, mem_heap_t heap)
	Copies the data pointed to by a data field. More...

bool	dfield_datas_are_binary_equal (const dfield_t field1, const dfield_t field2, ulint len)
	Tests if two data fields are equal. More...

static bool	dfield_data_is_binary_equal (const dfield_t field, ulint len, const byte data)

static ulint	dtuple_get_info_bits (const dtuple_t *tuple)
	Gets info bits in a data tuple. More...

static void	dtuple_set_info_bits (dtuple_t *tuple, ulint info_bits)
	Sets info bits in a data tuple. More...

static ulint	dtuple_get_n_fields_cmp (const dtuple_t *tuple)
	Gets number of fields used in record comparisons. More...

static void	dtuple_set_n_fields_cmp (dtuple_t *tuple, ulint n_fields_cmp)

static ulint	dtuple_get_n_fields (const dtuple_t *tuple)
	Gets number of fields in a data tuple. More...

static ulint	dtuple_get_n_v_fields (const dtuple_t *tuple)
	Gets the number of virtual fields in a data tuple. More...

static dfield_t *	dtuple_get_nth_field (const dtuple_t *tuple, ulint n)

static dfield_t *	dtuple_get_nth_v_field (const dtuple_t *tuple, ulint n)

static dtuple_t *	dtuple_create_from_mem (void *buf, ulint buf_size, ulint n_fields, ulint n_v_fields)
	Creates a data tuple from an already allocated chunk of memory. More...

static void	dtuple_dup_v_fld (const dtuple_t vrow, mem_heap_t heap)
	Duplicate the virtual field data in a dtuple_t. More...

static void	dtuple_init_v_fld (const dtuple_t *vrow)
	Initialize the virtual field data in a dtuple_t. More...

static dtuple_t *	dtuple_create (mem_heap_t *heap, ulint n_fields)
	Creates a data tuple to a memory heap. More...

static dtuple_t *	dtuple_create_with_vcol (mem_heap_t *heap, ulint n_fields, ulint n_v_fields)
	Creates a data tuple with virtual columns to a memory heap. More...

static void	dtuple_copy_v_fields (dtuple_t d_tuple, const dtuple_t s_tuple)
	Copies a data tuple's virtual fields to another. More...

static dtuple_t *	dtuple_copy (const dtuple_t tuple, mem_heap_t heap)
	Copies a data tuple to another. More...

static ulint	dtuple_get_data_size (const dtuple_t *tuple, ulint comp)
	The following function returns the sum of data lengths of a tuple. More...

static void	dtuple_set_types_binary (dtuple_t *tuple, ulint n)
	Sets types of fields binary in a tuple. More...

static uint64_t	dtuple_hash (const dtuple_t *tuple, ulint n_fields, ulint n_bytes, uint64_t hash_value)

static void	data_write_sql_null (byte *data, ulint len)

static bool	dtuple_contains_null (const dtuple_t *tuple)

void	dtuple_big_rec_free (big_rec_t *vector)
	Frees the memory in a big rec vector. More...

Variables
byte	data_error
	Dummy variable to catch access to uninitialized fields. More...

Detailed Description

SQL data field and tuple.

Created 5/30/1994 Heikki Tuuri

Function Documentation

◆ data_write_sql_null()

static void data_write_sql_null	(	byte *	data,
		ulint	len
	)

inlinestatic

◆ dfield_copy()

static void dfield_copy	(	dfield_t *	field1,
		const dfield_t *	field2
	)

inlinestatic

Copies a data field to another.

Parameters

field1	out: field to copy to
field2	in: field to copy from

◆ dfield_copy_data()

static void dfield_copy_data	(	dfield_t *	field1,
		const dfield_t *	field2
	)

inlinestatic

Copies the data and len fields.

Parameters

field1	out: field to copy to
field2	in: field to copy from

◆ dfield_data_is_binary_equal()

static bool dfield_data_is_binary_equal	(	const dfield_t *	field,
		ulint	len,
		const byte *	data
	)

inlinestatic

◆ dfield_datas_are_binary_equal()

bool dfield_datas_are_binary_equal	(	const dfield_t *	field1,
		const dfield_t *	field2,
		ulint	len
	)

inline

Tests if two data fields are equal.

If len==0, tests the data length and content for equality. If len>0, tests the first len bytes of the content for equality.

Parameters

[in]	field1	first field to compare
[in]	field2	second field to compare
[in]	len	maximum prefix to compare, or 0 to compare the whole field length. This works only if !multi_val

Returns: true if both fields are NULL or if they are equal

◆ dfield_dup()

static void dfield_dup	(	dfield_t *	field,
		mem_heap_t *	heap
	)

inlinestatic

Copies the data pointed to by a data field.

Parameters

field	in/out: data field
heap	in: memory heap where allocated

◆ dfield_get_data()

static void * dfield_get_data ( const dfield_t * field )

inlinestatic

Gets pointer to the data in a field.

Returns: pointer to data

Parameters

field in: field

◆ dfield_get_len()

static uint32_t dfield_get_len ( const dfield_t * field )

inlinestatic

Gets length of field data.

Returns: length of data; UNIV_SQL_NULL if SQL null data

Parameters

field in: field

◆ dfield_get_spatial_status()

static spatial_status_t dfield_get_spatial_status ( const dfield_t * field )

inlinestatic

Gets spatial status for "external storage".

Parameters

[in,out] field field

◆ dfield_get_type()

static dtype_t * dfield_get_type ( const dfield_t * field )

inlinestatic

Gets pointer to the type struct of SQL data field.

Returns: pointer to the type struct

Parameters

field in: SQL data field

◆ dfield_is_ext()

static bool dfield_is_ext ( const dfield_t * field )

inlinestatic

Determines if a field is externally stored.

Returns: nonzero if externally stored

Parameters

field in: field

◆ dfield_is_multi_value()

static bool dfield_is_multi_value ( const dfield_t * field )

inlinestatic

◆ dfield_is_null()

static ulint dfield_is_null ( const dfield_t * field )

inlinestatic

Determines if a field is SQL NULL.

Returns: nonzero if SQL null data

Parameters

field in: field

◆ dfield_multi_value_dup()

static void dfield_multi_value_dup	(	dfield_t *	field,
		mem_heap_t *	heap
	)

inlinestatic

Copies the data pointed to by a data field.

This function works for multi-value fields only.

Parameters

[in,out]	field	data field
[in]	heap	memory heap where allocated

◆ dfield_set_data()

static void dfield_set_data	(	dfield_t *	field,
		const void *	data,
		ulint	len
	)

inlinestatic

Sets pointer to the data and length in a field.

Parameters

field	in: field
data	in: data
len	in: length or UNIV_SQL_NULL

◆ dfield_set_ext()

static void dfield_set_ext ( dfield_t * field )

inlinestatic

Sets the "external storage" flag.

Parameters

field in/out: field

◆ dfield_set_len()

static void dfield_set_len	(	dfield_t *	field,
		ulint	len
	)

inlinestatic

Sets length in a field.

Parameters

field	in: field
len	in: length or UNIV_SQL_NULL

◆ dfield_set_null()

static void dfield_set_null ( dfield_t * field )

inlinestatic

Sets a data field to SQL NULL.

Parameters

field in/out: field

◆ dfield_set_spatial_status()

static void dfield_set_spatial_status	(	dfield_t *	field,
		spatial_status_t	spatial_status
	)

inlinestatic

Sets spatial status for "external storage".

Parameters

[in,out]	field	field
[in]	spatial_status	spatial status

◆ dfield_set_type()

static void dfield_set_type	(	dfield_t *	field,
		const dtype_t *	type
	)

inlinestatic

Sets the type struct of SQL data field.

Parameters

field	in: SQL data field
type	in: pointer to data type struct

◆ dfield_write_mbr()

static void dfield_write_mbr	(	dfield_t *	field,
		const double *	mbr
	)

inlinestatic

Sets pointer to the data and length in a field.

Parameters

field	in: field
mbr	in: data

◆ dtuple_big_rec_free()

void dtuple_big_rec_free ( big_rec_t * vector )

inline

Frees the memory in a big rec vector.

in, own: big rec vector; it is freed in this function

◆ dtuple_contains_null()

static bool dtuple_contains_null ( const dtuple_t * tuple )

inlinestatic

◆ dtuple_copy()

static dtuple_t * dtuple_copy	(	const dtuple_t *	tuple,
		mem_heap_t *	heap
	)

inlinestatic

Copies a data tuple to another.

This is a shallow copy; if a deep copy is desired, dfield_dup() will have to be invoked on each field.

Returns: own: copy of tuple

Parameters

tuple	in: tuple to copy from
heap	in: memory heap where the tuple is created

◆ dtuple_copy_v_fields()

static void dtuple_copy_v_fields	(	dtuple_t *	d_tuple,
		const dtuple_t *	s_tuple
	)

inlinestatic

Copies a data tuple's virtual fields to another.

This is a shallow copy;

Parameters

[in,out]	d_tuple	destination tuple
[in]	s_tuple	source tuple

◆ dtuple_create()

static dtuple_t * dtuple_create	(	mem_heap_t *	heap,
		ulint	n_fields
	)

inlinestatic

Creates a data tuple to a memory heap.

The default value for number of fields used in record comparisons for this tuple is n_fields.

Returns: own: created tuple

Parameters

heap	in: memory heap where the tuple is created, DTUPLE_EST_ALLOC(n_fields) bytes will be allocated from this heap
n_fields	in: number of fields

◆ dtuple_create_from_mem()

static dtuple_t * dtuple_create_from_mem	(	void *	buf,
		ulint	buf_size,
		ulint	n_fields,
		ulint	n_v_fields
	)

inlinestatic

Creates a data tuple from an already allocated chunk of memory.

The size of the chunk must be at least DTUPLE_EST_ALLOC(n_fields). The default value for number of fields used in record comparisons for this tuple is n_fields.

Parameters

[in,out]	buf	buffer to use
[in]	buf_size	buffer size
[in]	n_fields	number of field
[in]	n_v_fields	number of fields on virtual columns

Returns: created tuple (inside buf)

◆ dtuple_create_with_vcol()

static dtuple_t * dtuple_create_with_vcol	(	mem_heap_t *	heap,
		ulint	n_fields,
		ulint	n_v_fields
	)

inlinestatic

Creates a data tuple with virtual columns to a memory heap.

Parameters

[in]	heap	memory heap where the tuple is created
[in]	n_fields	number of fields
[in]	n_v_fields	number of fields on virtual col

Returns: own: created tuple

◆ dtuple_dup_v_fld()

static void dtuple_dup_v_fld	(	const dtuple_t *	vrow,
		mem_heap_t *	heap
	)

inlinestatic

Duplicate the virtual field data in a dtuple_t.

Parameters

[in,out]	vrow	dtuple contains the virtual fields
[in]	heap	heap memory to use

◆ dtuple_get_data_size()

static ulint dtuple_get_data_size	(	const dtuple_t *	tuple,
		ulint	comp
	)

inlinestatic

The following function returns the sum of data lengths of a tuple.

The space occupied by the field structs or the tuple struct is not counted. Neither is possible space in externally stored parts of the field.

Returns: sum of data lengths

Parameters

tuple	in: typed data tuple
comp	in: nonzero=ROW_FORMAT=COMPACT

◆ dtuple_get_info_bits()

static ulint dtuple_get_info_bits ( const dtuple_t * tuple )

inlinestatic

Gets info bits in a data tuple.

Returns: info bits

Parameters

tuple in: tuple

◆ dtuple_get_n_fields()

static ulint dtuple_get_n_fields ( const dtuple_t * tuple )

inlinestatic

Gets number of fields in a data tuple.

Returns: number of fields

Parameters

tuple in: tuple

◆ dtuple_get_n_fields_cmp()

static ulint dtuple_get_n_fields_cmp ( const dtuple_t * tuple )

inlinestatic

Gets number of fields used in record comparisons.

Returns: number of fields used in comparisons in rem0cmp.*

Parameters

tuple in: tuple

◆ dtuple_get_n_v_fields()

static ulint dtuple_get_n_v_fields ( const dtuple_t * tuple )

inlinestatic

Gets the number of virtual fields in a data tuple.

Parameters

[in] tuple dtuple to check

Returns: number of fields

◆ dtuple_get_nth_field()

static dfield_t * dtuple_get_nth_field	(	const dtuple_t *	tuple,
		ulint	n
	)

inlinestatic

◆ dtuple_get_nth_v_field()

static dfield_t * dtuple_get_nth_v_field	(	const dtuple_t *	tuple,
		ulint	n
	)

inlinestatic

◆ dtuple_hash()

static uint64_t dtuple_hash	(	const dtuple_t *	tuple,
		ulint	n_fields,
		ulint	n_bytes,
		uint64_t	hash_value
	)

inlinestatic

◆ dtuple_init_v_fld()

static void dtuple_init_v_fld ( const dtuple_t * vrow )

inlinestatic

Initialize the virtual field data in a dtuple_t.

Parameters

[in,out] vrow dtuple contains the virtual fields

◆ dtuple_set_info_bits()

static void dtuple_set_info_bits	(	dtuple_t *	tuple,
		ulint	info_bits
	)

inlinestatic

Sets info bits in a data tuple.

Parameters

tuple	in: tuple
info_bits	in: info bits

◆ dtuple_set_n_fields_cmp()

static void dtuple_set_n_fields_cmp	(	dtuple_t *	tuple,
		ulint	n_fields_cmp
	)

inlinestatic

◆ dtuple_set_types_binary()

static void dtuple_set_types_binary	(	dtuple_t *	tuple,
		ulint	n
	)

inlinestatic

Sets types of fields binary in a tuple.

Parameters

tuple	in: data tuple
n	in: number of fields to set

Variable Documentation

◆ data_error

byte data_error

extern

Dummy variable to catch access to uninitialized fields.

In the debug version, dtuple_create() will make all fields of dtuple_t point to data_error.

Functions

Variables

Detailed Description

Function Documentation

◆ data_write_sql_null()

◆ dfield_copy()

◆ dfield_copy_data()

◆ dfield_data_is_binary_equal()

◆ dfield_datas_are_binary_equal()

◆ dfield_dup()

◆ dfield_get_data()

◆ dfield_get_len()

◆ dfield_get_spatial_status()

◆ dfield_get_type()

◆ dfield_is_ext()

◆ dfield_is_multi_value()

◆ dfield_is_null()

◆ dfield_multi_value_dup()

◆ dfield_set_data()

◆ dfield_set_ext()

◆ dfield_set_len()

◆ dfield_set_null()

◆ dfield_set_spatial_status()

◆ dfield_set_type()

◆ dfield_write_mbr()

◆ dtuple_big_rec_free()

◆ dtuple_contains_null()

◆ dtuple_copy()

◆ dtuple_copy_v_fields()

◆ dtuple_create()

◆ dtuple_create_from_mem()

◆ dtuple_create_with_vcol()

◆ dtuple_dup_v_fld()

◆ dtuple_get_data_size()

◆ dtuple_get_info_bits()

◆ dtuple_get_n_fields()

◆ dtuple_get_n_fields_cmp()

◆ dtuple_get_n_v_fields()

◆ dtuple_get_nth_field()

◆ dtuple_get_nth_v_field()

◆ dtuple_hash()

◆ dtuple_init_v_fld()

◆ dtuple_set_info_bits()

◆ dtuple_set_n_fields_cmp()

◆ dtuple_set_types_binary()

Variable Documentation

◆ data_error