Henrik Aasted Sørensen 98c595312a libs/pubsub/query: add EXISTS operator (#4077) ...

## Issue:

This PR adds an "EXISTS" condition to the event query grammar. It enables querying for the occurrence of an event without having to provide a condition for one of its attributes.

As an example, someone interested in all slashing events might currently catch them with a query such as slash.power > 0.

With this PR the event can be captured with slash.power EXISTS or just slash EXISTS to catch by event type.

## Examples:

`slash EXISTS`

## Commits:

* Add EXISTS condition to query grammar

* Gofmt files

* Move PEG instructions out of auto-generated file to prevent overwrite

* Update libs/pubsub/query/query.go

Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com>

* Update changelog and add test case

* Merge with other changes in PR #4070

* Add EXISTS to Conditions() func

* Apply gofmt

* Addressing PR comments

2019-11-07 11:30:50 +04:00

..

query

libs/pubsub/query: add EXISTS operator (#4077)

2019-11-07 11:30:50 +04:00

example_test.go

abci: Refactor tagging events using list of lists (#3643)

2019-06-12 14:03:45 +02:00

pubsub_test.go

Fix linter errors thrown by lll (#3970)

2019-10-17 10:42:28 +02:00

pubsub.go

libs/pubsub: relax tx querying (#4070)

2019-10-28 09:37:58 +03:00

subscription.go

abci: Refactor tagging events using list of lists (#3643)

2019-06-12 14:03:45 +02:00