Table of Contents

Class CompatibilitySchema.CacheObject

Namespace
LinqToDB.Tools.DataProvider.SqlServer.Schemas
Assembly
linq2db.Tools.dll

sys.syscacheobjects (Transact-SQL)

Applies to: √ SQL Server (all supported versions)

Contains information about how the cache is used.

important


This SQL Server 2000 system table is included as a view for backward compatibility. We recommend that you use the current SQL Server system views instead. To find the equivalent system view or views, see Mapping System Tables to System Views (Transact-SQL). This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature.


See sys.syscacheobjects.

[Table(Schema = "sys", Name = "syscacheobjects", IsView = true)]
public class CompatibilitySchema.CacheObject
Inheritance
CompatibilitySchema.CacheObject
Extension Methods

Properties

AvgExecTime

For backward compatibility only. Always returns 0.

[Column("avgexectime")]
[Nullable]
public long? AvgExecTime { get; set; }

Property Value

long?

BucketID

Bucket ID. Value indicates a range from 0 through (directory size - 1). Directory size is the size of the hash table.

[Column("bucketid")]
[NotNull]
public int BucketID { get; set; }

Property Value

int

CacheObjType

Type of object in the cache:

Compiled plan

Executable plan

Parse tree

Cursor

Extended stored procedure

[Column("cacheobjtype")]
[NotNull]
public string CacheObjType { get; set; }

Property Value

string

DateFormat

Date format of the connection that created the cache object.

[Column("dateformat")]
[Nullable]
public short? DateFormat { get; set; }

Property Value

short?

DbID

Database ID in which the cache object was compiled.

[Column("dbid")]
[Nullable]
public short? DbID { get; set; }

Property Value

short?

DbIDExec

Database ID from which the query is executed.

For most objects, dbidexec has the same value as dbid.

For system views, dbidexec is the database ID from which the query is executed.

For ad hoc queries, dbidexec is 0. This means dbidexec has the same value as dbid.

[Column("dbidexec")]
[Nullable]
public short? DbIDExec { get; set; }

Property Value

short?

LangID

Language ID. ID of the language of the connection that created the cache object.

[Column("langid")]
[Nullable]
public short? LangID { get; set; }

Property Value

short?

LastReads

For backward compatibility only. Always returns 0.

[Column("lastreads")]
[Nullable]
public long? LastReads { get; set; }

Property Value

long?

LastTime

For backward compatibility only. Always returns 0.

[Column("lasttime")]
[Nullable]
public long? LastTime { get; set; }

Property Value

long?

LastWrites

For backward compatibility only. Always returns 0.

[Column("lastwrites")]
[Nullable]
public long? LastWrites { get; set; }

Property Value

long?

MaxExecTime

For backward compatibility only. Always returns 0.

[Column("maxexectime")]
[Nullable]
public long? MaxExecTime { get; set; }

Property Value

long?

ObjID

One of the main keys used for looking up an object in the cache. This is the object ID stored in sysobjects for database objects (procedures, views, triggers, and so on). For cache objects such as ad hoc or prepared SQL, objid is an internally generated value.

[Column("objid")]
[Nullable]
public int? ObjID { get; set; }

Property Value

int?

ObjType

Type of object:

Stored procedure

Prepared statement

Ad hoc query (Transact-SQL submitted as language events from the sqlcmd or osql utilities, instead of remote procedure calls)

ReplProc (replication procedure)

Trigger

View

Default

User table

System table

Check

Rule

[Column("objtype")]
[NotNull]
public string ObjType { get; set; }

Property Value

string

PagesUsed

Number of pages consumed by the cache object.

[Column("pagesused")]
[Nullable]
public int? PagesUsed { get; set; }

Property Value

int?

RefCounts

Number of other cache objects referencing this cache object. A count of 1 is the base.

[Column("refcounts")]
[NotNull]
public int RefCounts { get; set; }

Property Value

int

SetOptions

SET option settings that affect a compiled plan. These settings are part of the cache key. Changes to values in this column indicate users have modified SET options. These options include the following:

ANSI_PADDING

FORCEPLAN

CONCAT_NULL_YIELDS_NULL

ANSI_WARNINGS

ANSI_NULLS

QUOTED_IDENTIFIER

ANSI_NULL_DFLT_ON

ANSI_NULL_DFLT_OFF

[Column("setopts")]
[Nullable]
public int? SetOptions { get; set; }

Property Value

int?

Sql

Module definition or the first 3900 characters of the batch submitted.

[Column("sql")]
[Nullable]
public string? Sql { get; set; }

Property Value

string

SqlBytes

Length in bytes of the procedure definition or batch submitted.

[Column("sqlbytes")]
[Nullable]
public int? SqlBytes { get; set; }

Property Value

int?

Status

Indicates whether the cache object is a cursor plan. Currently, only the least significant bit is used.

[Column("status")]
[Nullable]
public int? Status { get; set; }

Property Value

int?

UID

Indicates the creator of the plan for ad hoc query plans and prepared plans.

-2 = The batch submitted does not depend on implicit name resolution and can be shared among different users. This is the preferred method. Any other value represents the user ID of the user submitting the query in the database.

Overflows or returns NULL if the number of users and roles exceeds 32,767.

[Column("uid")]
[Nullable]
public short? UID { get; set; }

Property Value

short?

UseCounts

Number of times this cache object has been used since inception.

[Column("usecounts")]
[NotNull]
public int UseCounts { get; set; }

Property Value

int