Add method for query cancellation

[tom4zelli]

Permitir o uso de cancelOperation, expondo diretamente na interface Attachment.

[asfernandes]

The driver should better avoid recreating weirdness of Firebird interfaces, so it would be better to split the function in two:

• One that do fb_cancel_disable / fb_cancel_enable thing
• One that do fb_cancel_raise / fb_cancel_abort thing

[tom4zelli]

Ok, could it be something like this?

cancelOperationEnable/cancelEnable(value:boolean)

• value = true -> fb_cancel_enable
• value = false -> fb_cancel_disable and cancelOperation(abort:boolean)
• abort = false -> fb_cancel_raise
• abort = true -> fb_cancel_abort

[tom4zelli]

[asfernandes]

Can you write tests for it? Also, please follow the coding style using spaces appropriately, example: no var?1:2 but var ? 1 : 2

[tom4zelli]

ok, sorry, my first contribution with git projects, I'm not yet familiar with norms and patterns...

[asfernandes]

I did some rework in your solution in branch https://github.com/asfernandes/node-firebird-drivers/tree/work/cancellation Please review and test.

[tom4zelli]

Tested and it's ok!!!

[tom4zelli]

thanks!!!, can you guide me if i should do anything else? I need to finalize something, should I do a "close pull request"?

[asfernandes]

thanks!!!, can you guide me if i should do anything else? I need to finalize something, should I do a "close pull request"?

Please maintain the PR open for now, it should change automatically to merge when I merge the branch I created with your commits included.

[asfernandes]

Merged in master.