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MySQL NDB Cluster 8.0  /  ...  /  The ndbinfo dictionary_tables Table

6.14.23 The ndbinfo dictionary_tables Table

This table provides NDB dictionary information for NDB tables. dictionary_tables contains the columns listed here:

  • table_id

    The table' unique ID

  • database_name

    Name of the database containing the table

  • table_name

    Name of the table

  • status

    The table status; one of New, Changed, Retrieved, Invalid, or Altered. (See Object::Status, for more information about object status values.)

  • attributes

    Number of table attributes

  • primary_key_cols

    Number of columns in the table's primary key

  • primary_key

    A comma-separated list of the columns in the table's primary key

  • storage

    Type of storage used by the table; one of memory, disk, or default

  • logging

    Whether logging is enabled for this table

  • dynamic

    1 if the table is dynamic, otherwise 0; the table is considered dynamic if table->getForceVarPart() is true, or if at least one table column is dynamic

  • read_backup

    1 if read from any replica (READ_BACKUP option is enabled for this table, otherwise 0; see Setting NDB Comment Options)

  • fully_replicated

    1 if FULLY_REPLICATED is enabled for this table (each data node in the cluster has a complete copy of the table), 0 if not; see Setting NDB Comment Options

  • checksum

    If this table uses a checksum, the value in this column is 1; if not, it is 0

  • row_size

    The amount of data, in bytes that can be stored in one row, not including any blob data stored separately in blob tables; see Table::getRowSizeInBytes(), in the API documentation, for more information

  • min_rows

    Minimum number of rows, as used for calculating partitions; see Table::getMinRows(), in the API documentation, for more information

  • max_rows

    Maximum number of rows, as used for calculating partitions; see Table::getMaxRows(), in the API documentation, for more information

  • tablespace

    ID of the tablespace to which the table belongs, if any; this is 0, if the table does not use data on disk

  • fragment_type

    The table's fragment type; one of Single, AllSmall, AllMedium, AllLarge, DistrKeyHash, DistrKeyLin, UserDefined, unused, or HashMapPartition; for more information, see Object::FragmentType, in the NDB API documentation

  • hash_map

    The hash map used by the table

  • fragments

    Number of table fragments

  • partitions

    Number of partitions used by the table

  • partition_balance

    Type of partition balance used, if any; one of FOR_RP_BY_NODE, FOR_RA_BY_NODE, FOR_RP_BY_LDM, FOR_RA_BY_LDM, FOR_RA_BY_LDM_X_2, FOR_RA_BY_LDM_X_3, or FOR_RA_BY_LDM_X_4; see Setting NDB Comment Options

  • contains_GCI

    1 if the table includes a global checkpoint index, otherwise 0

  • single_user_mode

    Type of access allowed to the table when single user mode is in effect; one of locked, read_only, or read_write; these are equivalent to the values SingleUserModeLocked, SingleUserModeReadOnly, and SingleUserModeReadWrite, respectively, of the Table::SingleUserMode type in the NDB API

  • force_var_part

    This is 1 if table->getForceVarPart() is true for this table, and 0 if it is not

  • GCI_bits

    Used in testing

  • author_bits

    Used in testing

The dictionary_tables table was added in NDB 8.0.29.