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sp_cursoroption (Transact-SQL)

  • Článek

Applies to: SQL Server

Sets cursor options or returns cursor information created by the sp_cursoropen stored procedure. sp_cursoroption is invoked by specifying ID = 8 in a tabular data stream (TDS) packet.

Transact-SQL syntax conventions

Syntax

sp_cursoroption cursor , code , value
[ ; ]

Arguments

cursor

A handle value generated by SQL Server, and returned by the sp_cursoropen stored procedure. The cursor parameter is int and can't be NULL.

code

Used to stipulate various factors of the cursor return values. The code parameter is int, and must be one of the following values:

Value Name Description
0x0001 TEXTPTR_ONLY Returns the text pointer, and not the actual data, for certain designated text or image columns.

TEXTPTR_ONLY allows text pointers to be used as handles to blob objects that can later be selectively retrieved or updated using Transact-SQL or DBLIB facilities (for example, Transact-SQL READTEXT or DBLIB DBWRITETEXT).
If a 0 value is assigned, all of the text and image columns in the select list return text pointers rather than data.
0x0002 CURSOR_NAME Assigns the name specified in value to the cursor, which allows ODBC to use Transact-SQL positioned UPDATE/DELETE statements on cursors opened via sp_cursoropen.

The string can be specified as any character or Unicode data type.
Since Transact-SQL positioned UPDATE/DELETE statements operate, by default, on the first row in a fat cursor, sp_cursor SETPOSITION should be used to position the cursor before issuing the positioned UPDATE/DELETE statement.
0x0003 TEXTDATA Returns the actual data, not the text pointer, for certain text or image columns on subsequent fetches (that is, this undoes the effect of TEXTPTR_ONLY).

If TEXTDATA is enabled for a particular column, the row is refetched or refreshed, and can then be set back to TEXTPTR_ONLY. As with TEXTPTR_ONLY, the value parameter is an integer that specifies the column number and a zero value returns all text or image columns.
0x0004 SCROLLOPT Scroll option. For more information, see Return code values.
0x0005 CCOPT Concurrency control option. For more information, see Return code values.
0x0006 ROWCOUNT The number of rows currently in the result set.

Note: The ROWCOUNT might have changed since the value returned by sp_cursoropen if asynchronous population is being used. The value -1 is returned if the number of rows is unknown.

value

Designates the value returned by code. value is a required parameter that calls for a 0x0001, 0x0002, or 0x0003 code input value.

A code value of 2 is a string data type. Any other code value input or returned by value is an int.

Return code values

The value parameter might return one of the following code values.

Return value Description
0x0004 SCROLLOPT
0X0005 CCOPT
0X0006 ROWCOUNT

The value parameter returns one of the following SCROLLOPT values.

Return value Description
0x0001 KEYSET
0x0002 DYNAMIC
0x0004 FORWARD_ONLY
0x0008 STATIC

The value parameter returns one of the following CCOPT values.

Return value Description
0x0001 READ_ONLY
0x0002 SCROLL_LOCKS
0x0004 or 0x0008 OPTIMISTIC

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