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# Which Problems Are Solved Add the ability to keep track of the current counts of projection resources. We want to prevent calling `SELECT COUNT(*)` on tables, as that forces a full scan and sudden spikes of DB resource uses. # How the Problems Are Solved - A resource_counts table is added - Triggers that increment and decrement the counted values on inserts and deletes - Triggers that delete all counts of a table when the source table is TRUNCATEd. This is not in the business logic, but prevents wrong counts in case someone want to force a re-projection. - Triggers that delete all counts if the parent resource is deleted - Script to pre-populate the resource_counts table when a new source table is added. The triggers are reusable for any type of resource, in case we choose to add more in the future. Counts are aggregated by a given parent. Currently only `instance` and `organization` are defined as possible parent. This can later be extended to other types, such as `project`, should the need arise. I deliberately chose to use `parent_id` to distinguish from the de-factor `resource_owner` which is usually an organization ID. For example: - For users the parent is an organization and the `parent_id` matches `resource_owner`. - For organizations the parent is an instance, but the `resource_owner` is the `org_id`. In this case the `parent_id` is the `instance_id`. - Applications would have a similar problem, where the parent is a project, but the `resource_owner` is the `org_id` # Additional Context Closes https://github.com/zitadel/zitadel/issues/9957
28 lines
523 B
Go
28 lines
523 B
Go
package setup
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import (
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"context"
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_ "embed"
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"github.com/zitadel/zitadel/internal/database"
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"github.com/zitadel/zitadel/internal/eventstore"
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)
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var (
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//go:embed 57.sql
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createResourceCounts string
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)
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type CreateResourceCounts struct {
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dbClient *database.DB
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}
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func (mig *CreateResourceCounts) Execute(ctx context.Context, _ eventstore.Event) error {
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_, err := mig.dbClient.ExecContext(ctx, createResourceCounts)
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return err
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}
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func (mig *CreateResourceCounts) String() string {
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return "57_create_resource_counts"
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}
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