Delete rows from my AO Table

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1

Hello,

How can I delete all rows from my AO table ?

I am trying something like :

    @Override
    public void removeAll() {
    	ao.deleteWithSQL(MyTableName.class);  
    }

it is getting converted to : DELETE FROM PUBLIC.AO_7F4041_JECHLOGS WHERE [*] and giving me SQL exception.

I also tried achieving something similar to
delete from tablename where 1==1;
but unable to add it properly in deleteWithSQL() function.

Once I achieve deleting all rows, I also have to find out deleting with some condition, Eg: where date_column is < today - X days

2

Try

ao.deleteWithSQL(MyTableName.class, "ID > ?", 0);

Another way is to select all rows with ao.find(MyTableName.class) and then delete them in forEach loop with ao.delete(row).

3

@AlexeyDorofeyev

nice meeting you again !!

Meanwhile I had found a little ugly workaround using known column.
ao.deleteWithSQL(JECHLogs.class, "EVENT_DATE IS NOT NULL OR EVENT_DATE IS NULL");

I shall definitely try yours as its seems more neat.

One more question :
Will we have the ‘ID’ column auto created in all the AO tables ??

4

Yes. Note that your AO entities interfaces always extend net.java.ao.Entity, which has getID() method.

5

Thank you for the confirmation @AlexeyDorofeyev

Also your code below works quite fine…
ao.deleteWithSQL(MyTableName.class, “ID > ?”, 0);