Progress
Language Reference


UPDATE Statement

Interfaces
OS
SpeedScript
All
All
No

Displays fields or variables, requests input, and then puts the input data in both the screen buffer and in the specified fields or variables.

The UPDATE statement is a combination of the following statements:

DATA MOVEMENT

SYNTAX

UPDATE
  [ UNLESS-HIDDEN ]
  [   field [ format-phrase ] [ WHEN expression ] 
    | TEXT ( field [ format-phrase ] ... ) 
    | field = expression  
    | constant [ AT n | TO n ] 
    | ^ 
    | SPACE [ ( n ) ] 
    | SKIP [ ( n )] 
  ] ... 
  [ GO-ON ( key-label ... ) ]
  [ frame-phrase ]
  [ editing-phrase ]
  [ NO-ERROR ] 

UPDATE record
  [ EXCEPT field ... ]
  [ frame-phrase ]
  [ NO-ERROR ] 

UNLESS-HIDDEN

Restricts UPDATE to fields whose HIDDEN attribute is FALSE.

field

Represents the name of the field or variable whose value you want to display, change, and store in the screen and record buffers.

In array fields, array elements with constant subscripts are handled as any other field. Array fields with no subscripts are expanded as though you entered the implicit elements. See the DISPLAY Statement reference entry for information on how array fields with expressions as subscripts are handled.

You can supply values for array elements in the UPDATE statement.

UPDATE x[1] = "x". 

This statement assigns the letter x to the first element of array x. If you do not include an array subscript, Progress assigns the value to all elements of the array.

UPDATE X = "X". 

This statement assigns the letter x to all elements of the array x.

format-phrase

Specifies one or more frame attributes for a field, variable, or expression. For more information on format-phrase, see the Format Phrase reference entry.

WHEN expression

Updates the field only when expression has a value of TRUE. The expression is a field name, variable name, or expression whose value is logical.

TEXT

Defines a group of character fields or variables (including array elements) to use automatic word wrap. The TEXT option works only with character fields that are Progress default FILL-IN widgets (not specified with the FILL-IN NATIVE option). When you insert data in the middle of a TEXT field, Progress wraps data that follows into the next TEXT field, if necessary. If you delete data from the middle of a TEXT field, Progress wraps data that follows to the empty area. If you enter more characters than the format for the field allows, Progress discards the extra characters. The character fields formats must be in the x(n) format. A blank in the first column of a line marks the beginning of a paragraph. Lines within a paragraph are treated as a group and will not wrap into other paragraphs.

Table 43 lists the keys you can use within a TEXT field and their actions.

Table 43: Key Actions in a TEXT() Field 
Key
Action
APPEND-LINE
Combines the line the cursor is in with the next line.
BACK-TAB
Moves the cursor to the previous TEXT field.
BREAK-LINE
Breaks the current line into two lines beginning with the character the cursor is in.
BACKSPACE
Moves the cursor one position to the left and deletes the character at that position. If the cursor is at the beginning of a line, BACKSPACE moves the cursor to the end of the previous line.
CLEAR
Clears the current field and all fields in the TEXT group that follow.
DELETE-LINE
Deletes the line the cursor is in.
NEW-LINE
Inserts a blank line below the line the cursor is in.
RECALL
Clears fields in the TEXT group and returns initial data values for the group.
RETURN
In overstrike mode, moves to the next field in the TEXT group on the screen. In insert mode, the line breaks at the cursor and the cursor is positioned at the beginning of the new line.
TAB
Moves to the field after the TEXT group on the screen. If there is no other field, the cursor moves to the beginning of the TEXT group.

In this procedure, the s-com field is a TEXT field. Run the procedure and enter text in the field to see how the TEXT option works.

r-text.p
DEFINE VARIABLE s-com AS CHARACTER FORMAT "x(40)" EXTENT 5.

FORM "Shipped   :" order.ship-date AT 13 SKIP
     "Misc Info :" order.instructions AT 13 SKIP(1)
     "Order Comments :" s-com AT 1
WITH FRAME o-com CENTERED NO-LABELS TITLE "Shipping Information".

FOR EACH customer, EACH order OF customer:
    DISPLAY cust.cust-num cust.name order.order-num order.order-date
           order.promise-date WITH FRAME order-hdr CENTERED.
    UPDATE ship-date instructions TEXT(s-com) WITH FRAME o-com.
    s-com = "".
END. 

field = expression

Indicates that the value of field is determined by evaluating the expression rather than having it entered on the screen or from a file. In effect, an assignment statement is embedded in the UPDATE statement.

constant AT n

Represents a constant value that you want to display in the frame. The n is the column in which you want to start the display.

constant TO n

Represents a constant value that you want to display in the frame. The n is the column in which you want to end the display.

^

Tells Progress to ignore an input field when input is being read from a file. Also, the following statement reads a line from an input file and ignore that line.

UPDATE^ 

SPACE [ ( n ) ]

Identifies the number (n) of blank spaces to insert after the expression displays. The n can be 0. If the number of spaces you specify is more than the spaces left on the current line of the frame, Progress starts a new line and discards any extra spaces. If you do not use this option or do not use n, Progress inserts one space between items in the frame.

SKIP [ ( n ) ]

Identifies the number (n) of blank lines to insert after the expression is displayed. The n can be 0. If you do not use this option, Progress does not skip a line between expressions unless they do not fit on one line. If you use the SKIP option, but do not specify n or if n is 0, Progress starts a new line unless it is already at the beginning of a new line.

GO-ON ( keylabel . . . )

Tells Progress to take the GO action when the user presses any of the keys listed. You list keys in addition to keys that perform the GO action by default or because of ON statements. For example, if you want Progress to execute the GO action when the user presses F1, use the statement GO-ON(F1). If you list more than one key, separate them with spaces, not commas.

Note that the GO-ON option is valid if you specify a list of fields in the UPDATE statement, but is invalid if you specify a record.

frame-phrase

Specifies the layout and processing properties of a frame. For more information on frame-phrase, see the Frame Phrase reference entry.

editing-phrase

Identifies processing to take place as each keystroke is entered. This is the syntax for editing-phrase:.

SYNTAX
[ LABEL : ] EDITING : statement ... END 

For more information on editing-phrase, see the EDITING Phrase reference entry.

NO-ERROR

Specifies that any errors that occur in the attempt to update a record are suppressed. After the UPDATE statement completes, you can check the ERROR-STATUS system handle for information on any errors that occurred.

record

Specifies the name of a record buffer. All of the fields in the record are processed as if you updated each of them individually.

To update a record in a table defined for multiple databases, you must qualify the record’s table name with the database name. See the Record Phrase reference entry for more information.

EXCEPT field

Affects all fields except those fields listed in the EXCEPT phrase; they are omitted from the update list.

EXAMPLES

The r-updat.p procedure lets you update the name, address, city, state, and country for each customer record in the database.

r-updat.p
FOR EACH customer:
  UPDATE name address city state country.
END. 

The r-updat2.p procedure reads each customer record and lets you update the name and credit-limit fields. The VALIDATE option on the first UPDATE statement ensures that you enter a credit-limit value that is less than 500000. The HELP option displays a message to that effect.

r-updat2.p
FOR EACH customer:
  UPDATE customer.name
    credit-limit VALIDATE(credit-limit < 500000, "Too high")
      HELP "Enter credit-limit < 500000".
    FOR EACH order OF customer:
      DISPLAY order-num.
      UPDATE promise-date ship-date VALIDATE(ship-date > today,
          "Ship date must be later than today").
    END.
END. 

The second FOR EACH block reads every order belonging to the customer, displays the order-num field, and lets you update the promise-date and ship-date fields. The VALIDATE option ensures that you enter a ship date value that is after today’s date.

This procedure requests a customer number and then lets you update information for that customer record. The frame phrase WITH 1 COLUMN 1 DOWN tells Progress to display the fields in a single column on the screen (rather than in a row across the screen) and to display only one customer record on the screen at a time.

r-updat3.p
REPEAT:
  PROMPT-FOR customer.cust-num.
  FIND customer USING cust-num.
  UPDATE name address city customer.state country WITH 1 COLUMN 1 DOWN.
END. 

NOTES

SEE ALSO

ASSIGN Statement, DISPLAY Statement, EDITING Phrase, Format Phrase, Frame Phrase, PROMPT-FOR Statement


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