The OPEN statement populates the result set, and FETCH returns a row from the result set. What is cursor declaration?ĭECLARE CURSOR defines the attributes of a Transact-SQL server cursor, such as its scrolling behavior and the query used to build the result set on which the cursor operates. You execute your program, you create a local variable or 3 to ‘catch’ said output, and then you PRINT it. Using the PRINT command in a SQL Worksheet Using the classic SQL*PLUS PRINT command to view the refcursor output will work in SQL Developer just like it would work in your command line tools. How do I display ref cursor output in PL SQL Developer? In essence, a REF CURSOR is a pointer or a handle to a result set on the database. What is reference cursor in PL SQL?Ī REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. The following shows an example of a strong REF CURSOR. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR. To declare a cursor variable, you use the REF CURSOR is the data type. With a cursor variable, you simply pass the reference to that cursor.
#Ref cursors how to#
How to declare a cursor for a function?.Are there different types of REF CURSOR in Oracle Database?.Which is the best definition of a REF CURSOR?.How are ref cursors represented in PL / SQL?.Which keyword is used to declare cursor?.What is the difference between ref cursor and Sys_refcursor?.What is the difference between cursor and ref cursor?.What is difference between cursor and ref cursor?.Which keyword is used to declare a cursor variable?.How do I display ref cursor output in PL SQL Developer?.MOUSEBUTTONDOWN : cursor_index += 1 cursor_index %= len ( cursors ) pg. K_ESCAPE ): going = False # if the mouse is clicked it will switch to a new cursor if event. Clock () going = True while going : clock. Cursor (( 20, 20 ), surf ) cursors = cursor_index = 0 pg. fill (( 120, 50, 50 )) # and use that as your surface color = pg. Surface (( 40, 40 )) # you could also load an image surf. thickarrow_strings ) ) # create a color cursor surf = pg. SYSTEM_CURSOR_NO ) # create bitmap cursors bitmap_1 = pg.
#Ref cursors code#
set_caption ( "Example code for the cursors module" ) # create a system cursor system = pg. Returns a new Cursor object with the same data and hotspot as the original. copy ( ) ¶ | :sl:`copy the current cursor` | :sg:`copy() -> Cursor` Width and height must be a multiple of 8, and the mask arrays must be theĬorrect size for the given width and height. () create binary cursor data from simple strings function. To create these variables, we can make use of the Lastly andmasks, a sequence of bytes containing the cursor bitmask data. Xormasks is a sequence of bytes containing the cursor xor data masks. Variable helps pygame to actually determine at what exact point the cursor So the value passed into the cursor hotspot hotspot is a sequence containing the cursorĪ cursor has a width and height, but a mouse position is represented by a When the mouse cursor is visible, it will be displayed as a black and whiteīitmap using the given bitmask arrays. The hotspot position must be within the bounds of the surface. Hotspot is an (x,y) coordinate that determines where in the cursor the exact point is. To create a color cursor, create a Cursor from a hotspot and a surface. You can also call (), and your cursor is ready (doing that is the same asĬalling (pygame.SYSTEM_CURSOR_ARROW).ĭoing one of those calls actually creates a system cursor using the default native image. In addition to the cursor constants available and described above, SYSTEM_CURSOR_HAND handĬreating a cursor without passing arguments SYSTEM_CURSOR_NO slashed circle or crossbones pygame. SYSTEM_CURSOR_SIZEALL four pointed arrow pointing north, south, east, and west pygame. SYSTEM_CURSOR_SIZENS double arrow pointing north and south pygame. SYSTEM_CURSOR_SIZEWE double arrow pointing west and east pygame. SYSTEM_CURSOR_SIZENESW double arrow pointing northeast and southwest pygame. SYSTEM_CURSOR_SIZENWSE double arrow pointing northwest and southeast pygame. SYSTEM_CURSOR_WAITARROW small wait cursor ( or wait if not available ) pygame. SYSTEM_CURSOR_CROSSHAIR crosshair pygame. Pygame Cursor Constant Description - pygame.
0 kommentar(er)
