Switch from partition to routing table
What does this MR do and why?
It adds a way of switching the reads and writes through the routing table without reloading the models:
partitionable scope: :build, through: {
table: :p_ci_builds_metadata,
flag: :ci_partitioning_use_ci_builds_metadata_routing_table
}
Example queries for reading:
[1] pry(main)> Feature.disable(:ci_partitioning_use_ci_builds_metadata_routing_table)
=> true
[3] pry(main)> Ci::BuildMetadata.last; nil
Ci::BuildMetadata Load (0.4ms) SELECT "ci_builds_metadata".* FROM "ci_builds_metadata" ORDER BY "ci_builds_metadata"."id" DESC LIMIT 1 /*application:console,db_config_name:ci,line:(pry):3:in `__pry__'*/
=> nil
[4] pry(main)> Ci::Build.last.metadata; nil
Ci::BuildMetadata Load (0.3ms) SELECT "ci_builds_metadata".* FROM "ci_builds_metadata" WHERE "ci_builds_metadata"."build_id" = 6 LIMIT 1 /*application:console,db_config_name:ci,line:(pry):4:in `__pry__'*/
=> nil
[5] pry(main)> Feature.enable(:ci_partitioning_use_ci_builds_metadata_routing_table)
=> true
[6] pry(main)> Ci::BuildMetadata.last; nil
Ci::BuildMetadata Load (0.5ms) SELECT "p_ci_builds_metadata".* FROM "p_ci_builds_metadata" ORDER BY "p_ci_builds_metadata"."id" DESC LIMIT 1 /*application:console,db_config_name:ci,line:(pry):6:in `__pry__'*/
=> nil
[7] pry(main)> Ci::Build.last.metadata; nil
Ci::BuildMetadata Load (0.2ms) SELECT "p_ci_builds_metadata".* FROM "p_ci_builds_metadata" WHERE "p_ci_builds_metadata"."build_id" = 6 LIMIT 1 /*application:console,db_config_name:ci,line:(pry):7:in `__pry__'*/
=> nil
[8] pry(main)> Feature.disable(:ci_partitioning_use_ci_builds_metadata_routing_table)
=> true
[9] pry(main)> Ci::BuildMetadata.last; nil
Ci::BuildMetadata Load (1.5ms) SELECT "ci_builds_metadata".* FROM "ci_builds_metadata" ORDER BY "ci_builds_metadata"."id" DESC LIMIT 1 /*application:console,db_config_name:ci,line:(pry):9:in `__pry__'*/
=> nil
[10] pry(main)> Ci::Build.last.metadata; nil
Ci::BuildMetadata Load (0.3ms) SELECT "ci_builds_metadata".* FROM "ci_builds_metadata" WHERE "ci_builds_metadata"."build_id" = 6 LIMIT 1 /*application:console,db_config_name:ci,line:(pry):10:in `__pry__'*/
=> nil
Associations:
[7] pry(main)> Feature.enable(:ci_partitioning_use_ci_builds_metadata_routing_table)
=> true
[8] pry(main)> Ci::Build.last.metadata; nil
Ci::Build Load (1.6ms) SELECT "ci_builds"."status", "ci_builds"."finished_at", "ci_builds"."created_at", "ci_builds"."updated_at", "ci_builds"."started_at", "ci_builds"."runner_id", "ci_builds"."coverage", "ci_builds"."commit_id", "ci_builds"."name", "ci_builds"."options", "ci_builds"."allow_failure", "ci_builds"."stage", "ci_builds"."trigger_request_id", "ci_builds"."stage_idx", "ci_builds"."tag", "ci_builds"."ref", "ci_builds"."user_id", "ci_builds"."type", "ci_builds"."target_url", "ci_builds"."description", "ci_builds"."project_id", "ci_builds"."erased_by_id", "ci_builds"."erased_at", "ci_builds"."artifacts_expire_at", "ci_builds"."environment", "ci_builds"."when", "ci_builds"."yaml_variables", "ci_builds"."queued_at", "ci_builds"."lock_version", "ci_builds"."coverage_regex", "ci_builds"."auto_canceled_by_id", "ci_builds"."retried", "ci_builds"."protected", "ci_builds"."failure_reason", "ci_builds"."scheduled_at", "ci_builds"."token_encrypted", "ci_builds"."upstream_pipeline_id", "ci_builds"."resource_group_id", "ci_builds"."waiting_for_resource_at", "ci_builds"."processed", "ci_builds"."scheduling_type", "ci_builds"."id", "ci_builds"."stage_id", "ci_builds"."partition_id" FROM "ci_builds" WHERE "ci_builds"."type" = 'Ci::Build' ORDER BY "ci_builds"."id" DESC LIMIT 1 /*application:console,db_config_name:ci,line:(pry):2:in `__pry__'*/
Ci::BuildMetadata Load (1.1ms) SELECT "p_ci_builds_metadata".* FROM "p_ci_builds_metadata" WHERE "p_ci_builds_metadata"."build_id" = 35 LIMIT 1 /*application:console,db_config_name:ci,line:(pry):2:in `__pry__'*/
=> nil
[9] pry(main)> Ci::Build.preload(:metadata).last; nil
Ci::Build Load (0.6ms) SELECT "ci_builds"."status", "ci_builds"."finished_at", "ci_builds"."created_at", "ci_builds"."updated_at", "ci_builds"."started_at", "ci_builds"."runner_id", "ci_builds"."coverage", "ci_builds"."commit_id", "ci_builds"."name", "ci_builds"."options", "ci_builds"."allow_failure", "ci_builds"."stage", "ci_builds"."trigger_request_id", "ci_builds"."stage_idx", "ci_builds"."tag", "ci_builds"."ref", "ci_builds"."user_id", "ci_builds"."type", "ci_builds"."target_url", "ci_builds"."description", "ci_builds"."project_id", "ci_builds"."erased_by_id", "ci_builds"."erased_at", "ci_builds"."artifacts_expire_at", "ci_builds"."environment", "ci_builds"."when", "ci_builds"."yaml_variables", "ci_builds"."queued_at", "ci_builds"."lock_version", "ci_builds"."coverage_regex", "ci_builds"."auto_canceled_by_id", "ci_builds"."retried", "ci_builds"."protected", "ci_builds"."failure_reason", "ci_builds"."scheduled_at", "ci_builds"."token_encrypted", "ci_builds"."upstream_pipeline_id", "ci_builds"."resource_group_id", "ci_builds"."waiting_for_resource_at", "ci_builds"."processed", "ci_builds"."scheduling_type", "ci_builds"."id", "ci_builds"."stage_id", "ci_builds"."partition_id" FROM "ci_builds" WHERE "ci_builds"."type" = 'Ci::Build' ORDER BY "ci_builds"."id" DESC LIMIT 1 /*application:console,db_config_name:ci,line:(pry):3:in `__pry__'*/
Ci::BuildMetadata Load (0.1ms) SELECT "p_ci_builds_metadata".* FROM "p_ci_builds_metadata" WHERE "p_ci_builds_metadata"."build_id" = 35 /*application:console,db_config_name:ci,line:(pry):3:in `__pry__'*/
=> nil
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Related to #377534 (closed)
Edited by Grzegorz Bizon