Language basics / Variables |
The FREE statement releases resources allocated to the specified variable.
FREE target
When followed by a variable name, the FREE statement releases resources allocated to store the data of TEXT and BYTE variables.
If the TEXT/BYTE variable was located in memory, the runtime system releases the memory. If the variable was located in a file, the runtime system deletes the file.
For variables declared in a local scope of reference, the resources are automatically freed by the runtime system when returning from the function or MAIN block.
After freeing a TEXT or BYTE variable, it must be re-configured with a new LOCATE call.
Temporary files of large object are automatically deleted when the program ends.
MAIN DEFINE ctext TEXT DATABASE stock LOCATE ctext IN FILE "/tmp/data1.txt" SELECT col1 INTO ctext FROM lobtab WHERE key=123 FREE ctext END MAIN