Expressions on parameters

[rkistner]

This is an initial refactoring to allow some types of expressions on token_parameters and user_parameters.

Examples that this now supports (see tests for more):

SELECT id from users WHERE filter_param = token_parameters.some_param ->> 'description'
SELECT id from users WHERE filter_param = upper(token_parameters.some_param)
SELECT id from projects WHERE page = user_parameters.index + 1

These expressions are only supported for parameter queries, not for bucket parameters in data queries.

Additionally this:

• Expands test coverage for sync rules.
• Refactors internal naming to make concepts easier to follow.
• Adds overview documentation on the implementation.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6d6a5d9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@powersync/service-sync-rules	Minor
@powersync/service-core	Patch
powersync-open-service	Patch

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[Chriztiaan]

The sync rule readme helps a lot!