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Oracle® TimesTen In-Memory Database SQL Reference
Release 11.2.1

Part Number E13070-04
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SYS.CACHE_GROUP

The CACHE_GROUP table describes the definition of a TimesTen cache.

Columns

Column name Type Description
CGNAME TT_CHAR (31) NOT NULL Group name.
CGOWNER TT_CHAR (31) NOT NULL Group owner.
CGID TT_INTEGER NOT NULL for 32-bit systems;

TT_BIGINT NOT NULL for 64-bit systems

Id of this cache group.
ROOT TT_INTEGER NOT NULL for 32-bit systems;

TT_BIGINT NOT NULL for 64-bit systems

Unique identifier for cache group's root table
SOURCE TT_CHAR (8) NOT NULL Data source for caching. In this release the only legal value is 'ORACLE'.
CGDURATION TT_INTEGER NOT NULL Duration
TBLCNT TT_SMALLINT NOT NULL Number of tables in cache group.
REFRESH_MODE TT_CHAR (1) NOT NULL The current auto refresh mode.

'N': No auto refresh.

'I': Incremental auto refresh.

'F': Full auto refresh.

REFRESH_STATE TT_CHAR (1) NOT NULL The current auto refresh mode.

'N': Off.

'Y': On.

'P': Paused.

REFRESH_INTERVAL TT_BIGINT NOT NULL Autorefresh interval in milliseconds.
CGATTRIBUTES BINARY (4) NOT NULL Bits 0-7 are for cache group types.

Bits 8-15 are for autoload options.

Bit 0: 1 - READONLY

Bit 1: 1 - SYNCHRONOUS WRITETHROUGH

Bit 2: 1 - AUTOREFRESH

Bit 3: 1 - PROPAGATE

Bit 8: 1 - Autoload on create (Always 1 for AUTOREFRESH)

Bit 9: 1 - Dynamic cache group

REFRESH_WITH_LIMIT TT_INTEGER NOT NULL The maximum number of autorefresh change log records kept in the trigger log table in the Oracle database. A larger value causes the autorefresh to use more space at Oracle, while it prevents the truncation of logs that are not autorefreshed to TimesTen yet, and therefore reduces the possible fallback to full refresh.

The field is used only by incremental autorefresh

ORATOP TT_VARCHAR (409600) NOT INLINE Reserved for future use
ORAPROXY TT_VARCHAR (409600) NOT INLINE Reserved for future use
ORABASE TT_VARCHAR (409600) NOT INLINE Reserved for future use
TTALIAS TT_VARCHAR (409600) NOT INLINE Reserved for future use