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information_schema.tables.data_free
mysql
type:
BIGINT NULL
5.7-8
mariadb
type:
NULL
Note:
Bytes allocated but unused. For InnoDB tables in a shared tablespace, the free space of the shared tablespace with small safety margin. An estimate in the case of partitioned tables - see the PARTITIONS table.
© 2022 MariaDB
5.1-10.8
tidb
type:
BIGINT(21) NULL
Note:
Data fragment. The value is currently 0.
© 2022 PingCAP
4-6.1
postgres
cockroachdb
mssql