--help, -h

Display a help message and exit. For example:

Usage: ./ibd2sdi [-v] [-c <strict-check>] [-d <dump file name>] [-n] filename1 [filenames]
See http://dev.mysql.com/doc/refman/8.4/en/ibd2sdi.html for usage hints.
  -h, --help          Display this help and exit.
  -v, --version       Display version information and exit.
  -#, --debug[=name]  Output debug log. See
                      http://dev.mysql.com/doc/refman/8.4/en/dbug-package.html
  -d, --dump-file=name
                      Dump the tablespace SDI into the file passed by user.
                      Without the filename, it will default to stdout
  -s, --skip-data     Skip retrieving data from SDI records. Retrieve only id
                      and type.
  -i, --id=#          Retrieve the SDI record matching the id passed by user.
  -t, --type=#        Retrieve the SDI records matching the type passed by
                      user.
  -c, --strict-check=name
                      Specify the strict checksum algorithm by the user.
                      Allowed values are innodb, crc32, none.
  -n, --no-check      Ignore the checksum verification.
  -p, --pretty        Pretty format the SDI output.If false, SDI would be not
                      human readable but it will be of less size
                      (Defaults to on; use --skip-pretty to disable.)

Variables (--variable-name=value)
and boolean options {FALSE|TRUE}  Value (after reading options)
--------------------------------- ----------------------------------------
debug                             (No default value)
dump-file                         (No default value)
skip-data                         FALSE
id                                0
type                              0
strict-check                      crc32
no-check                          FALSE
pretty                            TRUE

--version, -v

Display version information and exit. For example:

ibd2sdi  Ver 8.4.0 for Linux on x86_64 (Source distribution)

--debug[=debug_options], -# [debug_options]

Prints a debug log. For debug options, refer to Section 7.9.4, “The DBUG Package”.

ibd2sdi --debug=d:t /tmp/ibd2sdi.trace

This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

--dump-file=, -d

Dumps serialized dictionary information (SDI) into the specified dump file. If a dump file is not specified, the tablespace SDI is dumped to stdout.

ibd2sdi --dump-file=file_name ../data/test/t1.ibd

--skip-data, -s

Skips retrieval of data field values from the serialized dictionary information (SDI) and only retrieves the id and type field values, which are primary keys for SDI records.

$> ibd2sdi --skip-data ../data/test/t1.ibd
["ibd2sdi"
,
{
	"type": 1,
	"id": 330
}
,
{
	"type": 2,
	"id": 7
}
]

--id=#, -i #

Retrieves serialized dictionary information (SDI) matching the specified table or tablespace object id. An object id is unique to the object type. Table and tablespace object IDs are also found in the id column of the mysql.tables and mysql.tablespace data dictionary tables. For information about data dictionary tables, see Section 16.1, “Data Dictionary Schema”.

$> ibd2sdi --id=7 ../data/test/t1.ibd
["ibd2sdi"
,
{
	"type": 2,
	"id": 7,
	"object":
		{
    "mysqld_version_id": 80003,
    "dd_version": 80003,
    "sdi_version": 1,
    "dd_object_type": "Tablespace",
    "dd_object": {
        "name": "test/t1",
        "comment": "",
        "options": "",
        "se_private_data": "flags=16417;id=2;server_version=80003;space_version=1;",
        "engine": "InnoDB",
        "files": [
            {
                "ordinal_position": 1,
                "filename": "./test/t1.ibd",
                "se_private_data": "id=2;"
            }
        ]
    }
}
}
]

--type=#, -t #

Retrieves serialized dictionary information (SDI) matching the specified object type. SDI is provided for table (type=1) and tablespace (type=2) objects.

This example shows output for a tablespace ts1 in the test database:

$> ibd2sdi --type=2 ../data/test/ts1.ibd
["ibd2sdi"
,
{
	"type": 2,
	"id": 7,
	"object":
		{
    "mysqld_version_id": 80003,
    "dd_version": 80003,
    "sdi_version": 1,
    "dd_object_type": "Tablespace",
    "dd_object": {
        "name": "test/ts1",
        "comment": "",
        "options": "",
        "se_private_data": "flags=16417;id=2;server_version=80003;space_version=1;",
        "engine": "InnoDB",
        "files": [
            {
                "ordinal_position": 1,
                "filename": "./test/ts1.ibd",
                "se_private_data": "id=2;"
            }
        ]
    }
}
}
]

Due to the way in which InnoDB handles default value metadata, a default value may be present and non-empty in ibd2sdi output for a given table column even if it is not defined using DEFAULT. Consider the two tables created using the following statements, in the database named i:

CREATE TABLE t1 (c VARCHAR(16) NOT NULL);

CREATE TABLE t2 (c VARCHAR(16) NOT NULL DEFAULT "Sakila");

Using ibd2sdi, we can see that the default_value for column c is nonempty and is in fact padded to length in both tables, like this:

$> ibd2sdi ../data/i/t1.ibd  | grep -m1 '\"default_value\"' | cut -b34- | sed -e s/,//
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\nAAAAAAAAAAA="

$> ibd2sdi ../data/i/t2.ibd  | grep -m1 '\"default_value\"' | cut -b34- | sed -e s/,//
"BlNha2lsYQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\nAAAAAAAAAAA="

Examination of ibd2sdi output may be easier using a JSON-aware utility like jq, as shown here:

$> ibd2sdi ../data/i/t1.ibd  | jq '.[1]["object"]["dd_object"]["columns"][0]["default_value"]'
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\nAAAAAAAAAAA="

$> ibd2sdi ../data/i/t2.ibd  | jq '.[1]["object"]["dd_object"]["columns"][0]["default_value"]'
"BlNha2lsYQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\nAAAAAAAAAAA="

For more information, see the MySQL Internals documentation.

--strict-check, -c

Specifies a strict checksum algorithm for validating the checksum of pages that are read. Options include innodb, crc32, and none.

In this example, the strict version of the innodb checksum algorithm is specified:

ibd2sdi --strict-check=innodb ../data/test/t1.ibd

In this example, the strict version of crc32 checksum algorithm is specified:

ibd2sdi -c crc32 ../data/test/t1.ibd

If you do not specify the --strict-check option, validation is performed against non-strict innodb, crc32 and none checksums.

--no-check, -n

Skips checksum validation for pages that are read.

ibd2sdi --no-check ../data/test/t1.ibd

--pretty, -p

Outputs SDI data in JSON pretty print format. Enabled by default. If disabled, SDI is not human readable but is smaller in size. Use --skip-pretty to disable.

ibd2sdi --skip-pretty ../data/test/t1.ibd