oceanbase.DBA_TAB_PARTITIONS

2025-12-09 07:09:36  Updated

Feature

This view displays the multi-level partitioning information, partition storage parameters, and partition statistics accessible to the current user.

Fields

Field Type Nullable Description
TABLE_OWNER varchar(128) NO The owner of the partitioned table.
TABLE_NAME varchar(128) NO The name of the partitioned table.
COMPOSITE varchar(3) NO Indicates whether the partition is a composite partition.
PARTITION_NAME varchar(128) NO The name of the partition.
SUBPARTITION_COUNT bigint(20) NO The number of subpartitions.
HIGH_VALUE varchar(262144) NO The partition expression.
HIGH_VALUE_LENGTH bigint(20) NO The length of the partition expression.
PARTITION_POSITION bigint(20) NO The position of the partition.
TABLESPACE_NAME varchar(30) NO The name of the tablespace containing the partition.
PCT_FREE bigint(0) NO At present, this field is not supported and is NULL by default.
PCT_USED bigint(0) NO At present, this field is not supported and is NULL by default.
INI_TRANS bigint(0) NO At present, this field is not supported and is NULL by default.
MAX_TRANS bigint(0) NO At present, this field is not supported and is NULL by default.
INITIAL_EXTENT bigint(0) NO At present, this field is not supported and is NULL by default.
NEXT_EXTENT bigint(0) NO At present, this field is not supported and is NULL by default.
MIN_EXTENT bigint(0) NO At present, this field is not supported and is NULL by default.
MAX_EXTENT bigint(0) NO At present, this field is not supported and is NULL by default.
MAX_SIZE bigint(0) NO At present, this field is not supported and is NULL by default.
PCT_INCREASE bigint(0) NO At present, this field is not supported and is NULL by default.
FREELISTS bigint(0) NO At present, this field is not supported and is NULL by default.
FREELIST_GROUPS bigint(0) NO At present, this field is not supported and is NULL by default.
LOGGING varchar(7) NO At present, this field is not supported and is NULL by default.
COMPRESSION varchar(8) NO Indicates whether compression is enabled.
COMPRESS_FOR varchar(30) NO The compression method.
NUM_ROWS bigint(0) NO At present, this field is not supported and is NULL by default.
BLOCKS bigint(0) NO At present, this field is not supported and is NULL by default.
EMPTY_BLOCKS bigint(0) NO At present, this field is not supported and is NULL by default.
AVG_SPACE bigint(0) NO At present, this field is not supported and is NULL by default.
CHAIN_CNT bigint(0) NO At present, this field is not supported and is NULL by default.
AVG_ROW_LEN bigint(0) NO At present, this field is not supported and is NULL by default.
SAMPLE_SIZE bigint(0) NO At present, this field is not supported and is NULL by default.
LAST_ANALYZED date NO At present, this field is not supported and is NULL by default.
BUFFER_POOL varchar(7) NO At present, this field is not supported and is NULL by default.
FLASH_CACHE varchar(7) NO At present, this field is not supported and is NULL by default.
CELL_FLASH_CACHE varchar(7) NO At present, this field is not supported and is NULL by default.
GLOBAL_STATS varchar(3) NO At present, this field is not supported and is NULL by default.
USER_STATS varchar(3) NO At present, this field is not supported and is NULL by default.
IS_NESTED varchar(3) NO At present, this field is not supported and is NULL by default.
PARENT_TABLE_PARTITION varchar(128) NO At present, this field is not supported and is NULL by default.
INTERVAL varchar(3) NO At present, this field is not supported and is NULL by default.
SEGMENT_CREATED varchar(4) NO At present, this field is not supported and is NULL by default.
INDEXING varchar(4) NO The index attribute. Valid values:
  • ON: The index of the subpartition is enabled.
  • OFF: The index of this subpartition is disabled.
  • READ_ONLY varchar(4) NO Indicates whether the subpartition is read-only. Valid values:
  • YES: The subpartition is read-only.
  • NO: The subpartition can be read and written.
  • INMEMORY varchar(8) NO Indicates whether in-memory column store is enabled for the subpartition. Valid values:
  • ENABLED: In-memory column store is enabled.
  • DISABLED: In-memory column store is disabled.
  • INMEMORY_PRIORITY varchar(8) NO The padding priority of the in-memory column store. Valid values:
  • LOW
  • MEDIUM
  • HIGH
  • CRITICAL
  • NONE
  • NULL
  • INMEMORY_DISTRIBUTE varchar(15) NO At present, this field is not supported and is NULL by default.
    INMEMORY_COMPRESSION varchar(17) NO The compression level for in-memory column store. Valid values:
  • NO MEMCOMPRESS
  • FOR DML
  • FOR QUERY [ LOW
  • HIGH ]
  • FOR CAPACITY [ LOW
  • HIGH ]
  • AUTO
  • NULL
    This value is based on the location of the middle section of the table. For example, if the table is partitioned and in-memory column store is enabled, the value of this field is NULL in ALL_TABLES is NULL and not NULL in ALL_TAB_SUBPARTITIONS.
  • INMEMORY_DUPLICATE varchar(13) NO At present, this field is not supported and is NULL by default.
    CELLMEMORY varchar(24) NO At present, this field is not supported and is NULL by default.
    INMEMORY_SERVICE varchar(12) NO The way that in-memory column store is padded on various instances. Valid values:
  • DEFAULTPARALLEL_INSTANCE_GROUP: Data is padded on all instances specified by the initialization parameter. This is the default value. If this parameter is not set, data is padded for all instances.
  • NONE: Data is not padded for any instance.
  • ALL: Data is padded for all instances regardless of the settings of the initialization parameter PARALLEL_INSTANCE_GROUP.
  • USER_DEFINED: Data is padded only for instances where the user-defined service is active. The service name is saved in the INMEMORY_SERVICE_NAME column.
  • INMEMORY_SERVICE_NAME varchar(100) NO The name of the service on which in-memory column store is padded. This column has values only when INMEMORY_SERVICE is set to USER_DEFINED. It is empty in other cases.
    MEMOPTIMIZE_READ varchar(8) NO Indicates whether shortcut-based access is enabled for the table. Valid values:
  • ENABLED
  • DISABLED
  • MEMOPTIMIZE_WRITE varchar(8) NO For internal use only.

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