cursor

For OLTP applications, there should be less sorting and temp space required and only a handful of concurrent cursors opened at a time.

Oracle also allows cursors to be tightly bound to a looping statement, a construct called a cursor FOR loop.

Cursors do not need to be used to read only the first message in a queue.

It is possible to exceed the maximum number of cursors available on the Publisher during this process.

The two cursors may be attached to any of the signals in the analyzed ASCII file.

Each user session can open multiple cursors up to the limit set by the initialization parameter OPEN_ CURSORS .

If you do not close your Cursors, then you might quickly run out of memory and cause your application to crash.

Open cursors of any other type are closed but not deallocated .

Adaptive Server Anywhere must execute value-sensitive cursors in such a way that result set membership is guaranteed.

Cursor stability ensures that applications using cursors do not introduce inconsistencies into the data in the database.

Stored procedures that DECLARE and OPEN local cursors can pass the cursors out for use by the calling stored procedure , trigger, or batch .

In contrast, IDS SPL supports a similar cursor looping statement but does not allow cursors to be explicitly declared, opened, or closed.

Static cursors do not actually get a row of data until you scroll to that record.

First, a package must be created to define all of the cursors used in the procedure, then the procedure can be created using the new cursor.

The TYPE_FORWARD_ONLY, TYPE_SS_DIRECT_FORWARD_ONLY, and TYPE_SS_SERVER_CURSOR_FORWARD_ONLY cursors support only the next positioning method.

Such cursors can be manipulated in a number of interesting ways, as shown in Listing 2.

In cursors, however, an additional set of scroll locks can be acquired based on the specification of a cursor concurrency level.

Typically used for pointer cursors and for animated figures in games.

When cursors generate a keyset for a result set, the query optimizer estimates the number of rows that will be returned for that result set.

Static cursors do not reflect updates , deletes, or inserts that are made to underlying data while the cursor is open .

Adaptive Server Anywhere provides cursors with a variety of sensitivity characteristics.

When a transaction rolls back to a savepoint, all non-hold cursors opened after that savepoint are closed.

Through correlation, SQL table functions allow a more efficient way of implementing iterations, otherwise done with cursors.

When this parameter is enabled, cursors are not actually closed until the next database request.

It records everything you see on the computer screen, including the entire desktop, windows, menus, cursors - even video with sound.

Software Description: About Native Maiden, The theme features a portrait of a native female with icons, key cursors and sounds.

No cursors have been opened, no rows qualified for the last opened cursor, or the last-opened cursor is closed or deallocated.

DECLARE statements can be used to define data variables and cursors that are local to the function.

Determines whether database cursors are used for SELECT statements.

You may want to check the settings in the game to see if there is an option to enable hardware mouse cursors (HW cursors).

These locks are held until the end of the current transaction for both cursors and independent SELECT statements.

Previously this kind of extraction would require cursors iterating over sections of a string.

In ODBC terminology, dynasets and snapshots are referred to as cursors.

This sample demonstrates how to use server-side cursors to work around the lack of MARS support for server-side programming.

If your driver already supports static cursors, you do not need to load the cursor library to get snapshot support.

Full synchronizations do not use vectors that create updates (DS_REPL_CURSORS) for filtering updates.

Developers should also avoid using insensitive cursors when long data is returned, because memory can be exhausted.

Compound statements can include declarations of variables, exceptions, temporary tables, or cursors inside the compound statement.

Declare cursors for each of the result sets to be returned that specify the WITH RETURN clause.

Users specify the type of concurrency control by selecting transaction isolation levels for connections or concurrency options on cursors.

In SQL procedures, cursors can be used to do more than iterate through rows of a result set.

The database API cursor models assume that static, keyset-driven, and dynamic cursors are always scrollable.

The number of declared cursors that are currently being maintained by the server.

Replication uses cursors on the Oracle Publisher during the process of adding articles to a publication.

Call this member function to determine how a Rollback operation affects cursors on open recordset objects.

Software Description: About Princess, This theme features a young cat named Princess and contains icons, cursors and sounds.

The second edition of the JDBC API introduced support for two new types of cursors: scroll-sensitive cursors and scroll-insensitive cursors.

The container can move up and down with the keyboard cursors up and down.

When any one of these supported cursors is used, the client can have only one open row.

When using cursors there is always a trade-off between efficiency and consistency.

The number of open cursors that are currently being maintained by the server.

Software Description: About Rose Garden WinAmp, View red, yellow and white roses growing in garden. Also included are custom cursors .

If an application does not want to see transient deleted rows by using dynamic cursors, a fetch relative (0) should be used.

You can save the state of tables and cursors when an application is closed by suspending the connection instead of closing it.

Static cursors use a work table to store the complete result set of the cursor.

This section describes what sensitivity is, and describes the sensitivity characteristics of cursors.

However , a level 1 driver can support dynasets if it supports extended fetching and keyset-driven cursors .

Software Description: About An Orca Sea by CD, Hear the haunting calls of Killer Whales. This theme has sounds, icons and animated cursors .

Static cursors retrieve the entire result set at the time the cursor is opened.

A cursor library is not commonly used in current systems; server cursors are used instead.

Local cursors offer important protection for cursors implemented in stored procedures and triggers.

In-place updates are supported for cursors where the cursor type and concurrency support updates.

However, the behavior of dynamic cursors can be provided only by serial execution.

This includes cursors declared and opened in stored procedures called by the batch that fired the trigger.

Comm and cannot be issued on at able with cursors int able buffering mode.

Fast forward-only cursors vary in when they acquire their locks depending on the execution plan chosen by the query optimizer.

Enable Static Cursors for Long Data: Select this check box to enable the driver to support long columns when using a static cursor.

If the connection option to keep cursors open on a commit is set on, these locks will be kept across a commit or rollback operation.

Cursors are automatically closed when a connection is terminated.

This variable controls whether uncommitted inserts can be ignored for cursors under the CS or RS isolation levels.

This example shows how cursors can be nested to produce complex reports.

The screen and inverse colors you apply to icons and cursors either shape and color the derived image or designate inverse regions.

Any cursors that are open when a transaction is committed or rolled back are closed.

These cursors were supported either in software or, if you happened to have an awesome video card, in hardware.

Using STATIC SCROLL cursors alleviates these problems but requires more memory and processing .

The Cursors Event Category includes event classes that are produced by cursor operations.

Transact-SQL batches, stored procedures, and triggers use the FETCH statement to fetch from Transact-SQL cursors.

Most cursors can be used in conjunction with the query processor.

If you've tried this, you may have noticed that the speed of the cursors is really slow.

Explains the benefits of populating large keyset-driven or static cursors asynchronously.

This means the database server has run out of dynamic cursors.

Cursors also support their own concurrency specifications, some of which generate additional locks on the rows in each fetch.

However, applications should close unneeded cursors to conserve system memory.

Only the TYPE_SS_SCROLL_KEYSET and the equivalent TYPE_SCROLL_SENSITIVE cursors expose deleted rows.

The OLE DB, ODBC, and ADO APIs support mapping cursors over the result sets of executed SQL statements.

When a transaction is either committed or rolled back, any open cursors are closed.

Client Batch Side cursors use a cursor library designed to deal with concurrency issues.

Include the CursorImplicitConversion event class in traces that are recording the performance of cursors.

Event. The example also demonstrates using custom cursors for the drag-and-drop operation.

When set to ON, any cursors open when a transaction is committed or rolled back are closed.

KEYSET cursors can reference remote tables if the OLE DB provider meets certain requirements.

Software Description: About Rocket Power, This Rocket Power theme has icons, cursors and sounds.

Cursors are the primary means for manipulating the results of queries.

Cursors that are open when a transaction is committed are closed.

DYNAMIC SCROLL cursors support all the FETCH options except ABSOLUTE.

Transactions are not isolated from each other, and read only cursors can access uncommitted changes from other transactions.

Transact-SQL cursors are intended for use in Transact-SQL batches, stored procedures, and triggers.

This includes cursors declared in stored procedures called by the error batch.

pureQuery helps you by automatically closing statements, result sets, and cursors when they are not in use anymore.

This means that the server will not close cursors when you commit a transaction.

The example also demonstrates using custom cursors for the drag-and-drop operation.

The invention refers to a kind of computer system, which can control and demonstrate two cursors in particular.

Essential - No. If this argument is null, then updatable cursors are used to modify the selected columns.

Base tables are referenced by views, cursors, SQL statements, and stored procedures.

Any cursors open when a transaction is committed or rolled back are closed.

With a wealth of tools and more than 40 effects at your fingertips, there's virtually no limit to the cursors you can create.

The MODIFY and DELETE (DROP) options close all cursors for the current connection.

Multiple cursors that run under one session are indistinguishable and are treated as one entity.

Returns a list of cursors currently visible on the connection and their attributes.

These cursors remain active and in position, and become accessible when the associated connection becomes active again.

Number of cursors that have been removed because of memory pressure on the cached plan.

Forward and dynamic cursors expose deleted rows in a similar way, but only while the cursors remain accessible in the fetch buffer.

The ABSOLUTE fetch option is not supported with dynamic cursors.

Asensitive cursors provide efficient performance at the expense of consistency.

DECLARE statements defining local data variables and local cursors.

Specify whether cursors close after the transaction opening the cursor has committed.

All WFS-supported wrappers except ODBC allow multiple cursors per connection.

Such cursors remain open when a transaction is committed.

For information on programming SQL procedures and cursors, see Using Procedures, Triggers, and Batches.

This section summarizes the performance issues of three types of cursors.

There are three catchall icons: blue (for iterators), orange (for cursors), and green (for Transact-SQL language constructs).

API server cursors are cursors implemented on the server and managed by API cursor functions.

The draft ISO SQL3 standard states that on a rollback, all cursors (even those cursors opened WITH HOLD) should close.

Explains the cursors types supported in distributed queries.

A part of the ODBC and DB-Library APIs that implements client cursors.

Cursors cannot be opened on WAITFOR statements.

The DECLARE CURSOR statement has been extended; thus you can specify the four cursor types for Transact-SQL cursors.

You can update some cursors that contain joins if the ANSI_UPDATE_CONSTRAINTS option is set to OFF.

If you want more cursors to be opened at the same time, shut the database, change INITSID. ORA and restart the database.

For information on Adaptive Server Anywhere cursors, see Adaptive Server Anywhere cursors.

Contains three examples that demonstrate using REF CURSORs.

Figure 1: Moving around the data with the cursors .

DYNAMIC SCROLL cursors can use all formats of the FETCH statement.

The data provider supports binding REF CURSORs as output parameters only.

For more information about cursors, see the Open Database Connectivity (ODBC) SDK in the MSDN documentation.

If this argument is null, then updatable cursors are used to modify the selected columns.

Fast forward-only and static cursors are fully supported in the result set when they are used with an EXCEPT or INTERSECT operation.

The rest of the book covers advanced topics such as cursors, XML in queries, parallelism, and plan guides.

Provides information about cursors and locking.

For more information about cursors, see ODBC Programmer's Reference.

Cursors that are opened before the start of the transaction remain open.

ODBC applications use cursors to manipulate and update result sets.

Both the ibm_db2 and PDO_IBM drivers support two types of cursors: forward-only cursors and scrollable cursors.

If cursors are used extensively, the trace may significantly impede performance.

When cursors are opened in embedded SQL, they are associated with the current connection.

The cursor library gives you snapshots (static cursors) even if they are not normally supported by your driver.

Number of idle or free cursors for the cached plan.

We do not recommend using cursors in triggers because they could potentially reduce performance.

What cursors have been open on the server for more than a specific period of time?

For an introduction to cursors, see Working with cursors.

To work around this limitation, you can use server-side cursors.

You can obtain this behavior by setting the ANSI_CLOSE_CURSORS_AT_ROLLBACK option to ON.

An indexed system-wide list containing pointer cursors.

Methods so that the title bar will behave correctly when drawing cursors and allowing for resizing.

Jacob Wobbrock is an assistant professor at the University of Washington. He leads the AIM Research Group that developed the cursors.

Cursors are an extension to result sets that provide that mechanism.

Number of currently executing batches containing one or more cursors that are using the cached plan.

This closes any associated cursors with the executed SQL statement so as to prevent database littering with open cursors.

Global cursors can be referenced outside the stored procedure or trigger in which they are declared.

For more information, see Working with Oracle REF CURSORs.

Most JDBC drivers cannot implement scrollable cursors because of limited support for scrollable cursors in the database system.

Or the EXECUTE statement does not have access to variables or local cursors defined in the executed string.

A zero indicates the position before the first row (see Using cursors in procedures and triggers).

Cursors Change the style of the mouse cursor with CSS.

The reason for this performance issue is that Unified ODBC uses scrollable dynamic cursors to issue SELECT statements.

Controls behavior of cursors after a commit operation has been performed.

In order to eliminate bias difference, should also be read, the two cursors.

In addition, commands for using device images are available when working with icons and cursors.

Describes how to use block cursors to efficiently retrieve multiple rows in each fetch operations.

Operations on cursors are not replicated.

This table shows how an application can process two cursors at the same time on a connection using two statement handles.

The Transact-SQL language supports a syntax for using cursors modeled after the SQL-92 cursor syntax.

Cursors are used only when you are using Adaptive Server Anywhere through another application.

There is no MRF support for forward only cursors.

However, in some cases, you will need to read cursors both forward and backward, in which case you should use scrollable cursor.

Updatable, holdable, and scrollable cursors on remote procedures are not supported.

This list of inactive cursors is kept in the compiled plan.

CursorTreeAdapter An adapter that exposes data from a series of Cursors to an ExpandableListView widget.

Cursors support processing a result set one row, or a block of rows, at a time.

Base table cursors can be opened only by using IOpenRowset: : OpenRowset.

In addition, the new property is used for both forward only and scrollable cursors for T2zos.

Adaptive Server Anywhere provides extensive support for different kinds of cursors and cursor operations.

You can access the different REF CURSORs by calling the OracleCommand. ExecuteReader method.

If a transaction rolls back, then cursors close except for those cursors opened WITH HOLD.

There are three types of cursors used in the game.

This means it will use MRF for scrollable cursors only if the server supports it for T4 and T2u.

Both icons and cursors are created and edited using the Image editor, as are bitmaps and other images.

Unlike database APIs such as ODBC and ADO, FORWARD_ONLY is supported with STATIC, KEYSET, and DYNAMIC Transact-SQL cursors.

Both icons and cursors are created and edited using the Image editor, as are bit maps and other images.

To design a trigger that affects multiple rows, use rowset-based logic instead of cursors.

When using the data provider to work with Oracle REF CURSORs, you should consider the following behaviors.

XMLBeans include innovative features such as XML cursors and support for XQuery expressions.

For more information on the kinds of cursors available through different programming interfaces, see Availability of cursors.

If there are two users executing the same batch, there will be two active cursors.

For example, work tables could be used to store temporary results for query spool, lob variables, XML variables, and cursors.

The load utility also accepts input from named pipes, devices (such as tape devices), or user-defined cursors.

The way you use cursors, and the kinds of cursors available to you, depend on the programming interface you use.

Object that is associated with the result set at the time when the result set is created for server-side cursors only.

As XML cursors are moved in the code, they move from one token to another.

For queries returning more than one row, you must use cursors.

We will see more about using cursors and queries to filter data next.

Transact-SQL server cursors also support updating data at the current row of a cursor.

To obtain a report of the Transact-SQL server cursors visible on the connection, use sp_cursor_list.

For dynamic cursors it more complex when the fetch size is greater than 1.

Cursors declared in a batch before the error batch are subject to rules 1 and 2.

The SQL Server 2005 behavior allows for better concurrency but opens up the chance of deadlocks for concurrent cursors.

The multiple cursors mean they can all participate in whatever exercise is under way on the screen.

To change client the behavior, users should use the SQL_COPT_SS_PRESERVE_CURSORS.

For read-only cursors, make the cursor unambiguous by using the FOR READ ONLY clause.

For dynamic cursors, the result set can have zero, one, or more rows.

To improve performance, Microsoft SQL Server can populate large keyset and static cursors asynchronously.

In SQL Server 2005, only cursors that are opened within the current transaction are closed at transaction commit time.

Make sure your have around 10000 open cursors setting for the Oracle database if that is the source.

SQL Server 2005 does not support generating keyset-driven or static Transact-SQL cursors asynchronously.

The disk space usage for cursors may vary depending on the query plan that is chosen.

For rowset cursors, the JDBC 1 positioned update syntax needs be aware of the rowset.

Applications that use the ADO, OLE DB, and ODBC APIs frequently interact with SQL Server by using API server cursors.

SQL Server restricts server cursors to a single result set.

In SQL Server version 7. 0, this option defaults to FALSE to match earlier versions of SQL Server, in which all cursors were global.

T4 and T2u may elect to use MRF for forward only cursors in the future.

Prior to Microsoft SQL Server version 7. 0, the names of Transact-SQL cursors were global to the connection.

Open the cursors to be returned.

Since ODBC can be used to model a data source that may not allow multiple cursors, the default for ODBC wrapper is set to 0.

The ODBC driver for your data source must support keyset-driven cursors.

Cursors always need to be declared in the beginning of the block. The order is as follows

Note: Always define a generic cursor at the end of the list in case none of the url-defined cursors can be used

When set to 1, SELECT statements are run directly without using database cursors, and the data source is limited to one active statement.

For more information about concurrency in cursors, see Cursor Concurrency (Database Engine).

In addition to fetching data out of cursors, you can load values from a single row query into variables using three different techniques

C - Reactive protein current density curve cursors cysteine cytoplasm

The following are the conditions under which updatable cursors against distributed queries are allowed

Describes the intricacies of the SQL Server Mobile Database Engine, including transactions, locking, multiuser access, and cursors.

These system functions and system stored procedures also support cursors

Transact-SQL keyset-driven cursors can reference remote tables only if the following conditions are met

Some advantages of using cursors in conjunction with the query processor are

Cursors, however, retrieve the rows at different times depending on the type of cursor

With cursors, you can carry out the following tasks within any programming interface

The following scalar functions return information about cursors

An application cannot execute the following statements when using API server cursors

The effect of a ROLLBACK on cursors is defined by these three rules

Icons and Cursors: Image Resources for Display Devices

Advantages of Using Cursors with the Query Processor

Using Cursors with Distributed Queries

Multiple result sets can be returned from an SQL procedure by using multiple cursors. To return multiple cursors, do the following

Retrieving Data from Multiple REF CURSORs Using an OracleDataReader

Using cursors on SELECT statements in procedures

Cursors extend result processing by

Scalable Database Cursors Using ADO

Cursors extend result set processing by doing the following

For more information about cursors, see