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docs: improve live query docs

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[DOCS-1547]: https://hasurahq.atlassian.net/browse/DOCS-1547?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

PR-URL: https://github.com/hasura/graphql-engine-mono/pull/10489
GitOrigin-RevId: 9f0e70c25a38aabc1fd71e4abf55aa3ee242ab73
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Rob Dominguez 2023-11-24 04:14:02 -05:00 committed by hasura-bot
parent d39f30c38c
commit 9b914baaea
3 changed files with 15 additions and 10 deletions
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docs/docs/subscriptions/postgres/index.mdx
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@ -36,7 +36,7 @@ have multiple subscriptions running at the same time they must be in separate qu
### Live queries
A live query subscription will return the latest result of the query being made and not necessarily all the individual
A live query subscription will return the **latest result** of the query being made and not necessarily all the individual
events leading up to the result. By default, updates are delivered to clients every **1 sec**.
See more details [here](/subscriptions/postgres/livequery/index.mdx).

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docs/docs/subscriptions/postgres/livequery/index.mdx
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@ -14,13 +14,15 @@ slug: index
## Introduction
A Live query subscription will return the latest result of the query being made and not necessarily all the individual
events leading up to the result.
A Live query subscription will return the **latest result** of the query being made and not necessarily all the
individual events leading up to the result, such as with a
[streaming subscription](/subscriptions/postgres/streaming/index.mdx).
By default, updates are delivered to clients every **1 sec**.
See more details on
[subscriptions execution](/subscriptions/postgres/livequery/execution.mdx).
A live query is a query that is continuously monitored for changes in the database and automatically updates the query
result whenever the underlying data changes. Live queries are a PostgreSQL-specific implementation that allow real-time
updates to clients without the need for manual polling or refreshing.
## Convert a query to a subscription
@ -29,8 +31,8 @@ You can turn any query into a subscription by simply replacing `query` with `sub
:::info Single subscription in each query caveat
Hasura follows the [GraphQL spec](https://graphql.github.io/graphql-spec/June2018/#sec-Single-root-field) which allows
for only one root field in a subscription. You also cannot execute multiple separate subscriptions in one query. To
have multiple subscriptions running at the same time they must be in separate queries.
for only one root field in a subscription. You also cannot execute multiple separate subscriptions in one query. To have
multiple subscriptions running at the same time they must be in separate queries.
:::

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docs/docs/subscriptions/postgres/streaming/index.mdx
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@ -15,8 +15,11 @@ slug: index
## Introduction
A streaming subscription streams the response according to the cursor provided by the user while making the
subscription. Streaming subscriptions can be used to subscribe only to the data which has been newly added to the result
set.
subscription. Streaming subscriptions can be used to subscribe only to the data which has been **newly added to the
result set.**
This is different from a [live query](/subscriptions/postgres/livequery/index.mdx) subscription where only the latest
value is returned to the client.
:::tip Supported from
@ -35,7 +38,7 @@ Streaming subscriptions work well with other Hasura features like
[relationships](/schema/postgres/table-relationships/index.mdx#table-relationships) and also leverage the power of
[subscriptions multiplexing](/subscriptions/postgres/livequery/execution.mdx#subscription-multiplexing).
:::info Confguration details
:::info Configuration details
In the case of streaming subscriptions, the multiplexed batch size can be configured via
`HASURA_GRAPHQL_STREAMING_QUERIES_MULTIPLEXED_BATCH_SIZE` and the refetch interval can be configured via