4D v16.3

Read only state

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4D v16.3
Read only state

Read only state 


 

Read only state {( aTable )} -> Function result 
Parameter Type   Description
aTable  Table in Table for which to test read-only state, or Default table, if omitted
Function result  Boolean in Access to table is read-only (TRUE), or Access to table is read-write (FALSE)

This function tests whether or not the state of aTable is read-only for the process in which it is called. Read only state returns TRUE if the state of aTable is read-only. Read only state returns FALSE if the state of aTable is read/ write.

Example  

The following example tests the state of an [Invoice] table. If the state of the [Invoice] table is read-only, it is set to read/write, and then the current record is reloaded.

 If(Read only state([Invoice]))
    READ WRITE([Invoice])
    LOAD RECORD([Invoice])
 End if

Note: The invoice record is reloaded to allow the user to modify it. A record that was previously loaded in a read-only state will remain locked until it is reloaded in a read/write state.



See also 

READ ONLY
READ WRITE
Record Locking

 
PROPERTIES 

Product: 4D
Theme: Record Locking
Number: 362

This command can be run in preemptive processes

 
HISTORY 

Created: < 4D v6

 
ARTICLE USAGE

4D Language Reference ( 4D v16)
4D Language Reference ( 4D v16.1)
4D Language Reference ( 4D v16.2)
4D Language Reference ( 4D v16.3)