| Subject |
Re: Command Window Commands |
| From |
Mervyn Bick <invalid@invalid.invalid> |
| Date |
Thu, 20 May 2021 09:08:59 +0200 |
| Newsgroups |
dbase.getting-started |
On 2021/05/20 07:25, Rouke wrote:
> When I double click a program in the Navigator, a 'do' command shows in the Command Window.
.........
> When I double click or select 'Run SQL' in the Navigator, there's no command in the Command Window
> What is the command to run an SQL from the Command Window?
I'm afraid you can't run a .sql file created by the SQL designer from
the Command Panel.
The .sql files produced by the designer are meant to be assigned to the
sql property of a query object. When you double-click on the icon,
dBASE creates a form with a query object and a grid object which is used
to display the result of the query. Quite a bit of work is done behind
the scenes before you see the result.
The way the contents of a .sql file created by the SQL designer is laid
out makes it unsuitable to be run as a program.
Firstly the dBASE DO command doesn't recognise the --Directory or
--databasename in the first line so this causes an error. A query
object does know how to deal with this line when it is in the code
assigned to its sql property.
Secondly, for the DO command to be able to execute an instruction the
entire instruction must be on one line or the ; line continuation must
be used to continue code on the next line. The code in a .sql file is a
SELECT statement which is spread over many lines to improve readability.
The designer does not, however, add ; line continuation markers at the
end of each line. A query object does have the ability to use the code
without line continuation markers. So, even if the first --Directory
line is removed the DO command can't handle the code.
If you remove the first -- line and add ; line continuation characters
you could DO whatever.sql from the Command Panel but all this does is
open the rowset in an XDLM workarea. You would still need to BROWSE to
see the data and then USE to delete the rowset. And once you've made
these changes the SQL designer won't be happy with the file.
Mervyn.
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