Optimizer and partition information stored in global variables  Global variables and text, unitext, and image data

Chapter 14: Using Batches and Control-of-Flow Language

Server information stored in global variables

Table 14-11 lists the global variables that contain miscellaneous information about Adaptive Server.

Table 14-11: Global variables containing Adaptive Server information

Global variable

Description

@@bulkarraysize

Returns the number of rows to be buffered in local server memory before being transferred using the bulk copy interface Used only with Component Integration Services for transferring rows to a remote server using select into. For more information, see the Component Integration Services User’s Guide.

@@bulkbatchsize

Returns the number of rows transferred to a remote server via select into proxy_table using the bulk interface. Used only with Component Integration Services for transferring rows to a remote server using select into. For more information, see the Component Integration Services User’s Guide.

@@boottime

Displays the time at which the server is started.

@@cis_version

Contains the date and version of Component Integration Services, if it is installed.

@@cmpstate

Determines the current mode of the primary companion in a High Availability environment. For the values returned, see Table 4-1 in Using Sybase Failover in a High Availability System.

@@guestuid

The guest server user ID. The value is -1.

@@guestuserid

The guest user ID. The value is 2.

@@invaliduserid

The ID for an invalid user. The value is -1

@@invalidusid

An invalid server user ID. The value is -2.

@@max_connections

Contains the maximum number of simultaneous connections that can be made with Adaptive Server in the current computer environment. You can configure Adaptive Server for any number of connections less than or equal to the value of @@max_connection, using number of user connections configuration parameter.

@@maxpagesize

Displays the server page size. The values are 2048, 4096, 8128, or 16384.

@@maxuserid

The highest user ID. The value is 2147483647.

@@max_precision

Returns the precision level used by decimal and numeric datatypes set by the server. This value is a fixed constant of 38.

@@maxuid

The highest server user ID. The value is 2147483647.

@@mingroupid

Lowest group user ID. The lowest value is 16384.

@@minsuid

Minimum server user ID. The lowest value is -32768.

@@minuserid

Lowest user ID. The lowest value is -32768.

@@maxgroupid

Highest group user ID. The highest value is 1048576

@@maxuserid

The highest user ID. The highest value is 2147483647

@@procid

Contains the stored procedure ID of the currently executing procedure.

@@probesuid

The probe user ID. The value is 2.

@@remotestate

Returns the current mode of the primary companion in a high availability environment. For values returned, see Table 4-1 in Using Sybase Failover in a High Availability Environment.

@@servername

Contains the name of this Adaptive Server. Define a server name with sp_addserver, and then restart Adaptive Server.

@@spid

Contains the server process ID number of the current process.

@@ssl_ciphersuite

Returns NULL if SSL protocol is not used on the current connection; otherwise, it returns the name of the cipher suite chosen by the SSL handshake on the current connection.

@@tempdbid

Returns a valid temporary database ID (dbid) of the session’s assigned temporary database.

@@thresh_hysteresis

Contains the decrease in free space required to activate a threshold. This amount, also known as the hysteresis value, is measured in 2K database pages. It determines how closely thresholds can be placed on a database segment.

@@timeticks

Contains the number of microseconds per tick. The amount of time per tick is machine-dependent.

@@version

Contains the date of the current release of Adaptive Server.

@@version_number

Returns the whole version of the current release of Adaptive Server as an integer (for example, 12503)

@@boottime

Displays the time at which Adaptive Server was started.





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