json_diff.cc File Reference

#include "sql/json_diff.h"
#include <sys/types.h>
#include "lex_string.h"
#include "my_alloc.h"
#include "my_byteorder.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_sys.h"
#include "mysql/components/services/bits/psi_bits.h"
#include "mysql_com.h"
#include "mysqld_error.h"
#include "sql-common/json_binary.h"
#include "sql-common/json_dom.h"
#include "sql-common/json_path.h"
#include "sql/current_thd.h"
#include "sql/debug_sync.h"
#include "sql/field.h"
#include "sql/log_event.h"
#include "sql/psi_memory_key.h"
#include "sql/sql_const.h"
#include "sql/table.h"
#include "sql_string.h"
#include "template_utils.h"

Functions
static size_t	length_of_length_and_string (size_t length)
	Return the total size of a data field, plus the size of the preceding integer that describes the length, when the integer is stored in net_field_length() format. More...
static bool	write_length_and_string (String *to, const String &from)
	Encode a String as (length, data) pair, with length being stored in net_field_length() format. More...
static Json_dom *	seek_exact_path (Json_dom *dom, const Json_path_iterator &first_leg, const Json_path_iterator &last_leg)
	Find the value at the specified path in a JSON DOM. More...
enum_json_diff_status	apply_json_diffs (Field_json *field, const Json_diff_vector *diffs)
	Apply a sequence of JSON diffs to the value stored in a JSON column. More...

Variables
static MEM_ROOT	empty_json_diff_vector_mem_root (PSI_NOT_INSTRUMENTED, 256)

Function Documentation

apply_json_diffs()

enum_json_diff_status apply_json_diffs	(	Field_json *	field,
		const Json_diff_vector *	diffs
	)

Apply a sequence of JSON diffs to the value stored in a JSON column.

Parameters

field	the column to update
diffs	the diffs to apply

Returns

an enum_json_diff_status value that tells if the diffs were applied successfully

length_of_length_and_string()

static size_t length_of_length_and_string ( size_t  length )

static

Return the total size of a data field, plus the size of the preceding integer that describes the length, when the integer is stored in net_field_length() format.

Parameters

length

The length of the data

Returns

The length of the data plus the length of the length field.

seek_exact_path()

static Json_dom * seek_exact_path ( Json_dom *  dom, const Json_path_iterator &  first_leg, const Json_path_iterator &  last_leg  )

static

Find the value at the specified path in a JSON DOM.

The path should not contain any wildcard or ellipsis, only simple array cells or member names. Auto-wrapping is not performed.

Parameters

dom	the root of the DOM
first_leg	the first path leg
last_leg	the last path leg (exclusive)

Returns

the JSON DOM at the given path, or nullptr if the path is not found

write_length_and_string()

static bool write_length_and_string ( String *  to, const String &  from  )

static

Encode a String as (length, data) pair, with length being stored in net_field_length() format.

Parameters

to	Buffer where length and data will be stored.
from	Source string containing the data.

Returns

true on out of memory, false on success.

Variable Documentation

empty_json_diff_vector_mem_root

MEM_ROOT empty_json_diff_vector_mem_root(PSI_NOT_INSTRUMENTED, 256) ( PSI_NOT_INSTRUMENTED  , 256    )

static