From c48b1ef416b1ba83459d0c182cc2f8da32904c5c Mon Sep 17 00:00:00 2001 From: Kaxil Naik Date: Fri, 22 Aug 2025 03:38:11 +0100 Subject: [PATCH] Fix MySQL UUID generation in task_instance migration MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The MySQL UUID v7 generation function in migration 0042 was creating malformed UUIDs that fail Pydantic validation when the scheduler attempts to enqueue task instances. ## Problem The original MySQL function had two critical issues: 1. Generated only 16 random hex characters instead of the required 20 2. Used SUBSTRING(rand_hex, 9) without length limit, producing 8-character final segments instead of the required 12 characters This resulted in malformed UUIDs like: - Bad: 0198cf6d-fb98-4555-7301-e29b8403 (32 chars, last segment: 8 chars) - Good: 0198cf6d-fb98-4555-7301-e29b8403abcd (36 chars, last segment: 12 chars) ## Simple Reproduction The issue can be demonstrated with pure Python and the malformed UUIDs: ```python from pydantic import BaseModel from uuid import UUID class TaskInstanceDemo(BaseModel): id: UUID # This fails with the exact error from the issue bad_uuid = "0198cf6d-fb98-4555-7301-e29b8403" # 32 chars TaskInstanceDemo(id=bad_uuid) # ValidationError: Input should be a valid UUID, invalid group length in group 4: expected 12, found 8 # This works fine good_uuid = "0198cf6d-fb98-4555-7301-e29b8403abcd" # 36 chars TaskInstanceDemo(id=good_uuid) # ✓ Success ``` ## When This Issue Occurs The validation error happens when: 1. Task instances exist in 'scheduled' state before migrating from 2.10 to 3.0.x 2. These tasks receive malformed UUIDs during migration 3. Scheduler tries to enqueue these tasks via ExecuteTask.make() 4. Pydantic validation fails: 'invalid group length in group 4: expected 12, found 8' Users with no scheduled tasks during migration or who create new DAG runs typically don't encounter this issue since new task instances get proper UUIDs from the Python uuid7() function. ## Solution Updated the MySQL uuid_generate_v7 function to: - Use RANDOM_BYTES(10) for cryptographically secure 20-character hex data - Apply explicit SUBSTRING(rand_hex, 9, 12) to ensure 12-character final segment - Mark function as NOT DETERMINISTIC (correct for random functions) - Use CHAR(20) declaration matching actual usage ## Why No Data Migration We decided against creating a separate migration to fix existing malformed UUIDs because: 1. **Limited scope** - Only affects task instances in 'scheduled' state during migration 2. **Self-healing** - System recovers as old tasks complete and new ones are created 3. **Risk mitigation** - Avoid complex primary key modifications in production 4. **Alternative available** - Manual fix script provided below for affected users 5. **Prevention focus** - Fixing root cause prevents future occurrences ## Manual Fix for Affected Users If you encounter the UUID validation error, you can fix existing malformed UUIDs: ```sql -- Fix malformed UUIDs by extending them to proper length UPDATE task_instance SET id = CONCAT( SUBSTRING(id, 1, 23), -- Keep first 23 chars (including last dash) LPAD(HEX(FLOOR(RAND() * POW(2,32))), 8, '0') -- Add 8 random hex chars ) WHERE LENGTH(SUBSTRING_INDEX(id, '-', -1)) = 8; -- Find 8-char final segments -- Verify the fix SELECT id, LENGTH(id) as uuid_length, LENGTH(SUBSTRING_INDEX(id, '-', -1)) as last_segment_length FROM task_instance WHERE LENGTH(SUBSTRING_INDEX(id, '-', -1)) != 12 LIMIT 5; ``` ## Testing Verified the fix generates valid UUIDs: - Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx (36 chars total) - Final segment: 12 characters (not 8) - Passes standard UUID validation patterns Fixes #54554 --- airflow-core/docs/img/airflow_erd.sha256 | 2 +- airflow-core/docs/img/airflow_erd.svg | 3852 ++++++++--------- ..._add_uuid_primary_key_to_task_instance_.py | 29 +- 3 files changed, 1941 insertions(+), 1942 deletions(-) diff --git a/airflow-core/docs/img/airflow_erd.sha256 b/airflow-core/docs/img/airflow_erd.sha256 index 377d8d3967e75..2bf51f60700df 100644 --- a/airflow-core/docs/img/airflow_erd.sha256 +++ b/airflow-core/docs/img/airflow_erd.sha256 @@ -1 +1 @@ -edfee8a534905c0b5e545c665421d6c17aa516b13578da8ffcf7ad9e66b15232 \ No newline at end of file +e6035c8fcb51bb55f5d33cf8e3cc45831a6edbff1c553ff2afa4885d77159616 \ No newline at end of file diff --git a/airflow-core/docs/img/airflow_erd.svg b/airflow-core/docs/img/airflow_erd.svg index 7d1c3d5b9c2fc..03234166ec47e 100644 --- a/airflow-core/docs/img/airflow_erd.svg +++ b/airflow-core/docs/img/airflow_erd.svg @@ -5,2343 +5,2343 @@ --> - + viewBox="0.00 0.00 2486.00 3703.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> + %3 - - + + -dag_priority_parsing_request - -dag_priority_parsing_request - -id - - [VARCHAR(32)] - NOT NULL - -bundle_name - - [VARCHAR(250)] - NOT NULL - -relative_fileloc - - [VARCHAR(2000)] - NOT NULL +log + +log + +id + + [INTEGER] + NOT NULL + +dag_id + + [VARCHAR(250)] + +dttm + + [TIMESTAMP] + +event + + [VARCHAR(60)] + +extra + + [TEXT] + +logical_date + + [TIMESTAMP] + +map_index + + [INTEGER] + +owner + + [VARCHAR(500)] + +owner_display_name + + [VARCHAR(500)] + +run_id + + [VARCHAR(250)] + +task_id + + [VARCHAR(250)] + +try_number + + [INTEGER] - + -log - -log - -id - - [INTEGER] - NOT NULL - -dag_id - - [VARCHAR(250)] - -dttm - - [TIMESTAMP] - -event - - [VARCHAR(60)] - -extra - - [TEXT] - -logical_date - - [TIMESTAMP] - -map_index - - [INTEGER] - -owner - - [VARCHAR(500)] - -owner_display_name - - [VARCHAR(500)] - -run_id - - [VARCHAR(250)] - -task_id - - [VARCHAR(250)] - -try_number - - [INTEGER] +dag_priority_parsing_request + +dag_priority_parsing_request + +id + + [VARCHAR(32)] + NOT NULL + +bundle_name + + [VARCHAR(250)] + NOT NULL + +relative_fileloc + + [VARCHAR(2000)] + NOT NULL - + -variable - -variable - -id - - [INTEGER] - NOT NULL - -description - - [TEXT] - -is_encrypted - - [BOOLEAN] - -key - - [VARCHAR(250)] - -val - - [TEXT] +job + +job + +id + + [INTEGER] + NOT NULL + +dag_id + + [VARCHAR(250)] + +end_date + + [TIMESTAMP] + +executor_class + + [VARCHAR(500)] + +hostname + + [VARCHAR(500)] + +job_type + + [VARCHAR(30)] + +latest_heartbeat + + [TIMESTAMP] + +start_date + + [TIMESTAMP] + +state + + [VARCHAR(20)] + +unixname + + [VARCHAR(1000)] - + -job - -job - -id - - [INTEGER] - NOT NULL - -dag_id - - [VARCHAR(250)] - -end_date - - [TIMESTAMP] - -executor_class - - [VARCHAR(500)] - -hostname - - [VARCHAR(500)] - -job_type - - [VARCHAR(30)] - -latest_heartbeat - - [TIMESTAMP] - -start_date - - [TIMESTAMP] - -state - - [VARCHAR(20)] - -unixname - - [VARCHAR(1000)] +variable + +variable + +id + + [INTEGER] + NOT NULL + +description + + [TEXT] + +is_encrypted + + [BOOLEAN] + +key + + [VARCHAR(250)] + +val + + [TEXT] connection - -connection - -id - - [INTEGER] - NOT NULL - -conn_id - - [VARCHAR(250)] - NOT NULL - -conn_type - - [VARCHAR(500)] - NOT NULL - -description - - [TEXT] - -extra - - [TEXT] - -host - - [VARCHAR(500)] - -is_encrypted - - [BOOLEAN] - -is_extra_encrypted - - [BOOLEAN] - -login - - [TEXT] - -password - - [TEXT] - -port - - [INTEGER] - -schema - - [VARCHAR(500)] + +connection + +id + + [INTEGER] + NOT NULL + +conn_id + + [VARCHAR(250)] + NOT NULL + +conn_type + + [VARCHAR(500)] + NOT NULL + +description + + [TEXT] + +extra + + [TEXT] + +host + + [VARCHAR(500)] + +is_encrypted + + [BOOLEAN] + +is_extra_encrypted + + [BOOLEAN] + +login + + [TEXT] + +password + + [TEXT] + +port + + [INTEGER] + +schema + + [VARCHAR(500)] callback_request - -callback_request - -id - - [INTEGER] - NOT NULL - -callback_data - - [JSONB] - NOT NULL - -callback_type - - [VARCHAR(20)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -priority_weight - - [INTEGER] - NOT NULL + +callback_request + +id + + [INTEGER] + NOT NULL + +callback_data + + [JSONB] + NOT NULL + +callback_type + + [VARCHAR(20)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +priority_weight + + [INTEGER] + NOT NULL slot_pool - -slot_pool - -id - - [INTEGER] - NOT NULL - -description - - [TEXT] - -include_deferred - - [BOOLEAN] - NOT NULL - -pool - - [VARCHAR(256)] - -slots - - [INTEGER] + +slot_pool + +id + + [INTEGER] + NOT NULL + +description + + [TEXT] + +include_deferred + + [BOOLEAN] + NOT NULL + +pool + + [VARCHAR(256)] + +slots + + [INTEGER] import_error - -import_error - -id - - [INTEGER] - NOT NULL - -bundle_name - - [VARCHAR(250)] - -filename - - [VARCHAR(1024)] - -stacktrace - - [TEXT] - -timestamp - - [TIMESTAMP] + +import_error + +id + + [INTEGER] + NOT NULL + +bundle_name + + [VARCHAR(250)] + +filename + + [VARCHAR(1024)] + +stacktrace + + [TEXT] + +timestamp + + [TIMESTAMP] asset_alias - -asset_alias - -id - - [INTEGER] - NOT NULL - -group - - [VARCHAR(1500)] - NOT NULL - -name - - [VARCHAR(1500)] - NOT NULL + +asset_alias + +id + + [INTEGER] + NOT NULL + +group + + [VARCHAR(1500)] + NOT NULL + +name + + [VARCHAR(1500)] + NOT NULL asset_alias_asset - -asset_alias_asset - -alias_id - - [INTEGER] - NOT NULL - -asset_id - - [INTEGER] - NOT NULL + +asset_alias_asset + +alias_id + + [INTEGER] + NOT NULL + +asset_id + + [INTEGER] + NOT NULL asset_alias--asset_alias_asset - -0..N -1 + +0..N +1 asset_alias_asset_event - -asset_alias_asset_event - -alias_id - - [INTEGER] - NOT NULL - -event_id - - [INTEGER] - NOT NULL + +asset_alias_asset_event + +alias_id + + [INTEGER] + NOT NULL + +event_id + + [INTEGER] + NOT NULL asset_alias--asset_alias_asset_event - -0..N -1 + +0..N +1 dag_schedule_asset_alias_reference - -dag_schedule_asset_alias_reference - -alias_id - - [INTEGER] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL + +dag_schedule_asset_alias_reference + +alias_id + + [INTEGER] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL asset_alias--dag_schedule_asset_alias_reference - -0..N -1 + +0..N +1 asset - -asset - -id - - [INTEGER] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -extra - - [JSON] - NOT NULL - -group - - [VARCHAR(1500)] - NOT NULL - -name - - [VARCHAR(1500)] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL - -uri - - [VARCHAR(1500)] - NOT NULL + +asset + +id + + [INTEGER] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +extra + + [JSON] + NOT NULL + +group + + [VARCHAR(1500)] + NOT NULL + +name + + [VARCHAR(1500)] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL + +uri + + [VARCHAR(1500)] + NOT NULL asset--asset_alias_asset - -0..N -1 + +0..N +1 asset_trigger - -asset_trigger - -asset_id - - [INTEGER] - NOT NULL - -trigger_id - - [INTEGER] - NOT NULL + +asset_trigger + +asset_id + + [INTEGER] + NOT NULL + +trigger_id + + [INTEGER] + NOT NULL asset--asset_trigger - -0..N -1 + +0..N +1 asset_active - -asset_active - -name - - [VARCHAR(1500)] - NOT NULL - -uri - - [VARCHAR(1500)] - NOT NULL + +asset_active + +name + + [VARCHAR(1500)] + NOT NULL + +uri + + [VARCHAR(1500)] + NOT NULL asset--asset_active - -1 -1 + +1 +1 asset--asset_active - -1 -1 + +1 +1 dag_schedule_asset_reference - -dag_schedule_asset_reference - -asset_id - - [INTEGER] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL + +dag_schedule_asset_reference + +asset_id + + [INTEGER] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL asset--dag_schedule_asset_reference - -0..N -1 + +0..N +1 task_outlet_asset_reference - -task_outlet_asset_reference - -asset_id - - [INTEGER] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -task_id - - [VARCHAR(250)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL + +task_outlet_asset_reference + +asset_id + + [INTEGER] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +task_id + + [VARCHAR(250)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL asset--task_outlet_asset_reference - -0..N -1 + +0..N +1 task_inlet_asset_reference - -task_inlet_asset_reference - -asset_id - - [INTEGER] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -task_id - - [VARCHAR(250)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL + +task_inlet_asset_reference + +asset_id + + [INTEGER] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +task_id + + [VARCHAR(250)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL asset--task_inlet_asset_reference - -0..N -1 + +0..N +1 asset_dag_run_queue - -asset_dag_run_queue - -asset_id - - [INTEGER] - NOT NULL - -target_dag_id - - [VARCHAR(250)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL + +asset_dag_run_queue + +asset_id + + [INTEGER] + NOT NULL + +target_dag_id + + [VARCHAR(250)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL asset--asset_dag_run_queue - -0..N -1 + +0..N +1 asset_event - -asset_event - -id - - [INTEGER] - NOT NULL - -asset_id - - [INTEGER] - NOT NULL - -extra - - [JSON] - NOT NULL - -source_dag_id - - [VARCHAR(250)] - -source_map_index - - [INTEGER] - -source_run_id - - [VARCHAR(250)] - -source_task_id - - [VARCHAR(250)] - -timestamp - - [TIMESTAMP] - NOT NULL + +asset_event + +id + + [INTEGER] + NOT NULL + +asset_id + + [INTEGER] + NOT NULL + +extra + + [JSON] + NOT NULL + +source_dag_id + + [VARCHAR(250)] + +source_map_index + + [INTEGER] + +source_run_id + + [VARCHAR(250)] + +source_task_id + + [VARCHAR(250)] + +timestamp + + [TIMESTAMP] + NOT NULL asset_event--asset_alias_asset_event - -0..N -1 + +0..N +1 dagrun_asset_event - -dagrun_asset_event - -dag_run_id - - [INTEGER] - NOT NULL - -event_id - - [INTEGER] - NOT NULL + +dagrun_asset_event + +dag_run_id + + [INTEGER] + NOT NULL + +event_id + + [INTEGER] + NOT NULL asset_event--dagrun_asset_event - -0..N -1 + +0..N +1 trigger - -trigger - -id - - [INTEGER] - NOT NULL - -classpath - - [VARCHAR(1000)] - NOT NULL - -created_date - - [TIMESTAMP] - NOT NULL - -kwargs - - [TEXT] - NOT NULL - -triggerer_id - - [INTEGER] + +trigger + +id + + [INTEGER] + NOT NULL + +classpath + + [VARCHAR(1000)] + NOT NULL + +created_date + + [TIMESTAMP] + NOT NULL + +kwargs + + [TEXT] + NOT NULL + +triggerer_id + + [INTEGER] trigger--asset_trigger - -0..N -1 + +0..N +1 task_instance - -task_instance - -id - - [UUID] - NOT NULL - -context_carrier - - [JSONB] - -custom_operator_name - - [VARCHAR(1000)] - -dag_id - - [VARCHAR(250)] - NOT NULL - -dag_version_id - - [UUID] - -duration - - [DOUBLE_PRECISION] - -end_date - - [TIMESTAMP] - -executor - - [VARCHAR(1000)] - -executor_config - - [BYTEA] - -external_executor_id - - [VARCHAR(250)] - -hostname - - [VARCHAR(1000)] - -last_heartbeat_at - - [TIMESTAMP] - -map_index - - [INTEGER] - NOT NULL - -max_tries - - [INTEGER] - -next_kwargs - - [JSONB] - -next_method - - [VARCHAR(1000)] - -operator - - [VARCHAR(1000)] - -pid - - [INTEGER] - -pool - - [VARCHAR(256)] - NOT NULL - -pool_slots - - [INTEGER] - NOT NULL - -priority_weight - - [INTEGER] - -queue - - [VARCHAR(256)] - -queued_by_job_id - - [INTEGER] - -queued_dttm - - [TIMESTAMP] - -rendered_map_index - - [VARCHAR(250)] - -run_id - - [VARCHAR(250)] - NOT NULL - -scheduled_dttm - - [TIMESTAMP] - -span_status - - [VARCHAR(250)] - NOT NULL - -start_date - - [TIMESTAMP] - -state - - [VARCHAR(20)] - -task_display_name - - [VARCHAR(2000)] - -task_id - - [VARCHAR(250)] - NOT NULL - -trigger_id - - [INTEGER] - -trigger_timeout - - [TIMESTAMP] - -try_number - - [INTEGER] - -unixname - - [VARCHAR(1000)] - -updated_at - - [TIMESTAMP] + +task_instance + +id + + [UUID] + NOT NULL + +context_carrier + + [JSONB] + +custom_operator_name + + [VARCHAR(1000)] + +dag_id + + [VARCHAR(250)] + NOT NULL + +dag_version_id + + [UUID] + +duration + + [DOUBLE_PRECISION] + +end_date + + [TIMESTAMP] + +executor + + [VARCHAR(1000)] + +executor_config + + [BYTEA] + +external_executor_id + + [VARCHAR(250)] + +hostname + + [VARCHAR(1000)] + +last_heartbeat_at + + [TIMESTAMP] + +map_index + + [INTEGER] + NOT NULL + +max_tries + + [INTEGER] + +next_kwargs + + [JSONB] + +next_method + + [VARCHAR(1000)] + +operator + + [VARCHAR(1000)] + +pid + + [INTEGER] + +pool + + [VARCHAR(256)] + NOT NULL + +pool_slots + + [INTEGER] + NOT NULL + +priority_weight + + [INTEGER] + +queue + + [VARCHAR(256)] + +queued_by_job_id + + [INTEGER] + +queued_dttm + + [TIMESTAMP] + +rendered_map_index + + [VARCHAR(250)] + +run_id + + [VARCHAR(250)] + NOT NULL + +scheduled_dttm + + [TIMESTAMP] + +span_status + + [VARCHAR(250)] + NOT NULL + +start_date + + [TIMESTAMP] + +state + + [VARCHAR(20)] + +task_display_name + + [VARCHAR(2000)] + +task_id + + [VARCHAR(250)] + NOT NULL + +trigger_id + + [INTEGER] + +trigger_timeout + + [TIMESTAMP] + +try_number + + [INTEGER] + +unixname + + [VARCHAR(1000)] + +updated_at + + [TIMESTAMP] trigger--task_instance - -0..N -{0,1} + +0..N +{0,1} deadline - -deadline - -id - - [UUID] - NOT NULL - -callback - - [JSON] - NOT NULL - -callback_state - - [VARCHAR(20)] - -dagrun_id - - [INTEGER] - -deadline_time - - [TIMESTAMP] - NOT NULL - -trigger_id - - [INTEGER] + +deadline + +id + + [UUID] + NOT NULL + +callback + + [JSON] + NOT NULL + +callback_state + + [VARCHAR(20)] + +dagrun_id + + [INTEGER] + +deadline_time + + [TIMESTAMP] + NOT NULL + +trigger_id + + [INTEGER] trigger--deadline - -0..N -{0,1} + +0..N +{0,1} hitl_detail - -hitl_detail - -ti_id - - [UUID] - NOT NULL - -body - - [TEXT] - -chosen_options - - [JSON] - -defaults - - [JSON] - -multiple - - [BOOLEAN] - -options - - [JSON] - NOT NULL - -params - - [JSON] - NOT NULL - -params_input - - [JSON] - NOT NULL - -respondents - - [JSON] - -response_at - - [TIMESTAMP] - -subject - - [TEXT] - NOT NULL - -user_id - - [VARCHAR(128)] + +hitl_detail + +ti_id + + [UUID] + NOT NULL + +body + + [TEXT] + +chosen_options + + [JSON] + +defaults + + [JSON] + +multiple + + [BOOLEAN] + +options + + [JSON] + NOT NULL + +params + + [JSON] + NOT NULL + +params_input + + [JSON] + NOT NULL + +respondents + + [JSON] + +response_at + + [TIMESTAMP] + +subject + + [TEXT] + NOT NULL + +user_id + + [VARCHAR(128)] task_instance--hitl_detail - -1 -1 + +1 +1 task_map - -task_map - -dag_id - - [VARCHAR(250)] - NOT NULL - -map_index - - [INTEGER] - NOT NULL - -run_id - - [VARCHAR(250)] - NOT NULL - -task_id - - [VARCHAR(250)] - NOT NULL - -keys - - [JSONB] - -length - - [INTEGER] - NOT NULL + +task_map + +dag_id + + [VARCHAR(250)] + NOT NULL + +map_index + + [INTEGER] + NOT NULL + +run_id + + [VARCHAR(250)] + NOT NULL + +task_id + + [VARCHAR(250)] + NOT NULL + +keys + + [JSONB] + +length + + [INTEGER] + NOT NULL task_instance--task_map - -0..N -1 + +0..N +1 task_instance--task_map - -0..N -1 + +0..N +1 task_instance--task_map - -0..N -1 + +0..N +1 task_instance--task_map - -0..N -1 + +0..N +1 task_reschedule - -task_reschedule - -id - - [INTEGER] - NOT NULL - -duration - - [INTEGER] - NOT NULL - -end_date - - [TIMESTAMP] - NOT NULL - -reschedule_date - - [TIMESTAMP] - NOT NULL - -start_date - - [TIMESTAMP] - NOT NULL - -ti_id - - [UUID] - NOT NULL + +task_reschedule + +id + + [INTEGER] + NOT NULL + +duration + + [INTEGER] + NOT NULL + +end_date + + [TIMESTAMP] + NOT NULL + +reschedule_date + + [TIMESTAMP] + NOT NULL + +start_date + + [TIMESTAMP] + NOT NULL + +ti_id + + [UUID] + NOT NULL task_instance--task_reschedule - -0..N -1 + +0..N +1 xcom - -xcom - -dag_run_id - - [INTEGER] - NOT NULL - -key - - [VARCHAR(512)] - NOT NULL - -map_index - - [INTEGER] - NOT NULL - -task_id - - [VARCHAR(250)] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -run_id - - [VARCHAR(250)] - NOT NULL - -timestamp - - [TIMESTAMP] - NOT NULL - -value - - [JSONB] + +xcom + +dag_run_id + + [INTEGER] + NOT NULL + +key + + [VARCHAR(512)] + NOT NULL + +map_index + + [INTEGER] + NOT NULL + +task_id + + [VARCHAR(250)] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +run_id + + [VARCHAR(250)] + NOT NULL + +timestamp + + [TIMESTAMP] + NOT NULL + +value + + [JSONB] task_instance--xcom - -0..N -1 + +0..N +1 task_instance--xcom - -0..N -1 + +0..N +1 task_instance--xcom - -0..N -1 + +0..N +1 task_instance--xcom - -0..N -1 + +0..N +1 task_instance_note - -task_instance_note - -ti_id - - [UUID] - NOT NULL - -content - - [VARCHAR(1000)] - -created_at - - [TIMESTAMP] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL - -user_id - - [VARCHAR(128)] + +task_instance_note + +ti_id + + [UUID] + NOT NULL + +content + + [VARCHAR(1000)] + +created_at + + [TIMESTAMP] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL + +user_id + + [VARCHAR(128)] task_instance--task_instance_note - -1 -1 + +1 +1 task_instance_history - -task_instance_history - -task_instance_id - - [UUID] - NOT NULL - -context_carrier - - [JSONB] - -custom_operator_name - - [VARCHAR(1000)] - -dag_id - - [VARCHAR(250)] - NOT NULL - -dag_version_id - - [UUID] - -duration - - [DOUBLE_PRECISION] - -end_date - - [TIMESTAMP] - -executor - - [VARCHAR(1000)] - -executor_config - - [BYTEA] - -external_executor_id - - [VARCHAR(250)] - -hostname - - [VARCHAR(1000)] - -map_index - - [INTEGER] - NOT NULL - -max_tries - - [INTEGER] - -next_kwargs - - [JSONB] - -next_method - - [VARCHAR(1000)] - -operator - - [VARCHAR(1000)] - -pid - - [INTEGER] - -pool - - [VARCHAR(256)] - NOT NULL - -pool_slots - - [INTEGER] - NOT NULL - -priority_weight - - [INTEGER] - -queue - - [VARCHAR(256)] - -queued_by_job_id - - [INTEGER] - -queued_dttm - - [TIMESTAMP] - -rendered_map_index - - [VARCHAR(250)] - -run_id - - [VARCHAR(250)] - NOT NULL - -scheduled_dttm - - [TIMESTAMP] - -span_status - - [VARCHAR(250)] - NOT NULL - -start_date - - [TIMESTAMP] - -state - - [VARCHAR(20)] - -task_display_name - - [VARCHAR(2000)] - -task_id - - [VARCHAR(250)] - NOT NULL - -trigger_id - - [INTEGER] - -trigger_timeout - - [TIMESTAMP] - -try_number - - [INTEGER] - NOT NULL - -unixname - - [VARCHAR(1000)] - -updated_at - - [TIMESTAMP] + +task_instance_history + +task_instance_id + + [UUID] + NOT NULL + +context_carrier + + [JSONB] + +custom_operator_name + + [VARCHAR(1000)] + +dag_id + + [VARCHAR(250)] + NOT NULL + +dag_version_id + + [UUID] + +duration + + [DOUBLE_PRECISION] + +end_date + + [TIMESTAMP] + +executor + + [VARCHAR(1000)] + +executor_config + + [BYTEA] + +external_executor_id + + [VARCHAR(250)] + +hostname + + [VARCHAR(1000)] + +map_index + + [INTEGER] + NOT NULL + +max_tries + + [INTEGER] + +next_kwargs + + [JSONB] + +next_method + + [VARCHAR(1000)] + +operator + + [VARCHAR(1000)] + +pid + + [INTEGER] + +pool + + [VARCHAR(256)] + NOT NULL + +pool_slots + + [INTEGER] + NOT NULL + +priority_weight + + [INTEGER] + +queue + + [VARCHAR(256)] + +queued_by_job_id + + [INTEGER] + +queued_dttm + + [TIMESTAMP] + +rendered_map_index + + [VARCHAR(250)] + +run_id + + [VARCHAR(250)] + NOT NULL + +scheduled_dttm + + [TIMESTAMP] + +span_status + + [VARCHAR(250)] + NOT NULL + +start_date + + [TIMESTAMP] + +state + + [VARCHAR(20)] + +task_display_name + + [VARCHAR(2000)] + +task_id + + [VARCHAR(250)] + NOT NULL + +trigger_id + + [INTEGER] + +trigger_timeout + + [TIMESTAMP] + +try_number + + [INTEGER] + NOT NULL + +unixname + + [VARCHAR(1000)] + +updated_at + + [TIMESTAMP] task_instance--task_instance_history - -0..N -1 + +0..N +1 task_instance--task_instance_history - -0..N -1 + +0..N +1 task_instance--task_instance_history - -0..N -1 + +0..N +1 task_instance--task_instance_history - -0..N -1 + +0..N +1 rendered_task_instance_fields - -rendered_task_instance_fields - -dag_id - - [VARCHAR(250)] - NOT NULL - -map_index - - [INTEGER] - NOT NULL - -run_id - - [VARCHAR(250)] - NOT NULL - -task_id - - [VARCHAR(250)] - NOT NULL - -k8s_pod_yaml - - [JSON] - -rendered_fields - - [JSON] - NOT NULL + +rendered_task_instance_fields + +dag_id + + [VARCHAR(250)] + NOT NULL + +map_index + + [INTEGER] + NOT NULL + +run_id + + [VARCHAR(250)] + NOT NULL + +task_id + + [VARCHAR(250)] + NOT NULL + +k8s_pod_yaml + + [JSON] + +rendered_fields + + [JSON] + NOT NULL task_instance--rendered_task_instance_fields - -0..N -1 + +0..N +1 task_instance--rendered_task_instance_fields - -0..N -1 + +0..N +1 task_instance--rendered_task_instance_fields - -0..N -1 + +0..N +1 task_instance--rendered_task_instance_fields - -0..N -1 + +0..N +1 dag_bundle - -dag_bundle - -name - - [VARCHAR(250)] - NOT NULL - -active - - [BOOLEAN] - -last_refreshed - - [TIMESTAMP] - -signed_url_template - - [VARCHAR(200)] - -template_params - - [JSON] - -version - - [VARCHAR(200)] + +dag_bundle + +name + + [VARCHAR(250)] + NOT NULL + +active + + [BOOLEAN] + +last_refreshed + + [TIMESTAMP] + +signed_url_template + + [VARCHAR(200)] + +template_params + + [JSON] + +version + + [VARCHAR(200)] dag - -dag - -dag_id - - [VARCHAR(250)] - NOT NULL - -asset_expression - - [JSON] - -bundle_name - - [VARCHAR(250)] - NOT NULL - -bundle_version - - [VARCHAR(200)] - -dag_display_name - - [VARCHAR(2000)] - -deadline - - [JSON] - -description - - [TEXT] - -fileloc - - [VARCHAR(2000)] - -has_import_errors - - [BOOLEAN] - -has_task_concurrency_limits - - [BOOLEAN] - NOT NULL - -is_paused - - [BOOLEAN] - -is_stale - - [BOOLEAN] - -last_expired - - [TIMESTAMP] - -last_parsed_time - - [TIMESTAMP] - -max_active_runs - - [INTEGER] - -max_active_tasks - - [INTEGER] - NOT NULL - -max_consecutive_failed_dag_runs - - [INTEGER] - NOT NULL - -next_dagrun - - [TIMESTAMP] - -next_dagrun_create_after - - [TIMESTAMP] - -next_dagrun_data_interval_end - - [TIMESTAMP] - -next_dagrun_data_interval_start - - [TIMESTAMP] - -owners - - [VARCHAR(2000)] - -relative_fileloc - - [VARCHAR(2000)] - -timetable_description - - [VARCHAR(1000)] - -timetable_summary - - [TEXT] + +dag + +dag_id + + [VARCHAR(250)] + NOT NULL + +asset_expression + + [JSON] + +bundle_name + + [VARCHAR(250)] + NOT NULL + +bundle_version + + [VARCHAR(200)] + +dag_display_name + + [VARCHAR(2000)] + +deadline + + [JSON] + +description + + [TEXT] + +fileloc + + [VARCHAR(2000)] + +has_import_errors + + [BOOLEAN] + +has_task_concurrency_limits + + [BOOLEAN] + NOT NULL + +is_paused + + [BOOLEAN] + +is_stale + + [BOOLEAN] + +last_expired + + [TIMESTAMP] + +last_parsed_time + + [TIMESTAMP] + +max_active_runs + + [INTEGER] + +max_active_tasks + + [INTEGER] + NOT NULL + +max_consecutive_failed_dag_runs + + [INTEGER] + NOT NULL + +next_dagrun + + [TIMESTAMP] + +next_dagrun_create_after + + [TIMESTAMP] + +next_dagrun_data_interval_end + + [TIMESTAMP] + +next_dagrun_data_interval_start + + [TIMESTAMP] + +owners + + [VARCHAR(2000)] + +relative_fileloc + + [VARCHAR(2000)] + +timetable_description + + [VARCHAR(1000)] + +timetable_summary + + [TEXT] dag_bundle--dag - -0..N -1 + +0..N +1 - + dag--dag_schedule_asset_alias_reference - -0..N -1 + +0..N +1 - + dag--dag_schedule_asset_reference - -0..N -1 + +0..N +1 - + dag--task_outlet_asset_reference - -0..N -1 + +0..N +1 - + dag--task_inlet_asset_reference - -0..N -1 + +0..N +1 - + dag--asset_dag_run_queue - -0..N -1 - - - -dag_version - -dag_version - -id - - [UUID] - NOT NULL - -bundle_name - - [VARCHAR(250)] - -bundle_version - - [VARCHAR(250)] - -created_at - - [TIMESTAMP] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -last_updated - - [TIMESTAMP] - NOT NULL - -version_number - - [INTEGER] - NOT NULL - - - -dag--dag_version - -0..N -1 + +0..N +1 - + dag_schedule_asset_name_reference - -dag_schedule_asset_name_reference - -dag_id - - [VARCHAR(250)] - NOT NULL - -name - - [VARCHAR(1500)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL + +dag_schedule_asset_name_reference + +dag_id + + [VARCHAR(250)] + NOT NULL + +name + + [VARCHAR(1500)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL - + dag--dag_schedule_asset_name_reference - -0..N -1 + +0..N +1 - + dag_schedule_asset_uri_reference - -dag_schedule_asset_uri_reference - -dag_id - - [VARCHAR(250)] - NOT NULL - -uri - - [VARCHAR(1500)] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL + +dag_schedule_asset_uri_reference + +dag_id + + [VARCHAR(250)] + NOT NULL + +uri + + [VARCHAR(1500)] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL - + dag--dag_schedule_asset_uri_reference - -0..N -1 + +0..N +1 + + + +dag_version + +dag_version + +id + + [UUID] + NOT NULL + +bundle_name + + [VARCHAR(250)] + +bundle_version + + [VARCHAR(250)] + +created_at + + [TIMESTAMP] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +last_updated + + [TIMESTAMP] + NOT NULL + +version_number + + [INTEGER] + NOT NULL + + + +dag--dag_version + +0..N +1 dag_tag - -dag_tag - -dag_id - - [VARCHAR(250)] - NOT NULL - -name - - [VARCHAR(100)] - NOT NULL + +dag_tag + +dag_id + + [VARCHAR(250)] + NOT NULL + +name + + [VARCHAR(100)] + NOT NULL dag--dag_tag - -0..N -1 + +0..N +1 dag_owner_attributes - -dag_owner_attributes - -dag_id - - [VARCHAR(250)] - NOT NULL - -owner - - [VARCHAR(500)] - NOT NULL - -link - - [VARCHAR(500)] - NOT NULL + +dag_owner_attributes + +dag_id + + [VARCHAR(250)] + NOT NULL + +owner + + [VARCHAR(500)] + NOT NULL + +link + + [VARCHAR(500)] + NOT NULL dag--dag_owner_attributes - -0..N -1 + +0..N +1 dag_warning - -dag_warning - -dag_id - - [VARCHAR(250)] - NOT NULL - -warning_type - - [VARCHAR(50)] - NOT NULL - -message - - [TEXT] - NOT NULL - -timestamp - - [TIMESTAMP] - NOT NULL + +dag_warning + +dag_id + + [VARCHAR(250)] + NOT NULL + +warning_type + + [VARCHAR(50)] + NOT NULL + +message + + [TEXT] + NOT NULL + +timestamp + + [TIMESTAMP] + NOT NULL dag--dag_warning - -0..N -1 + +0..N +1 dag_favorite - -dag_favorite - -dag_id - - [VARCHAR(250)] - NOT NULL - -user_id - - [VARCHAR(250)] - NOT NULL + +dag_favorite + +dag_id + + [VARCHAR(250)] + NOT NULL + +user_id + + [VARCHAR(250)] + NOT NULL dag--dag_favorite - -0..N -1 + +0..N +1 dag_version--task_instance - -0..N -{0,1} + +0..N +{0,1} dag_run - -dag_run - -id - - [INTEGER] - NOT NULL - -backfill_id - - [INTEGER] - -bundle_version - - [VARCHAR(250)] - -clear_number - - [INTEGER] - NOT NULL - -conf - - [JSONB] - -context_carrier - - [JSONB] - -created_dag_version_id - - [UUID] - -creating_job_id - - [INTEGER] - -dag_id - - [VARCHAR(250)] - NOT NULL - -data_interval_end - - [TIMESTAMP] - -data_interval_start - - [TIMESTAMP] - -end_date - - [TIMESTAMP] - -last_scheduling_decision - - [TIMESTAMP] - -log_template_id - - [INTEGER] - -logical_date - - [TIMESTAMP] - -queued_at - - [TIMESTAMP] - -run_after - - [TIMESTAMP] - NOT NULL - -run_id - - [VARCHAR(250)] - NOT NULL - -run_type - - [VARCHAR(50)] - NOT NULL - -scheduled_by_job_id - - [INTEGER] - -span_status - - [VARCHAR(250)] - NOT NULL - -start_date - - [TIMESTAMP] - -state - - [VARCHAR(50)] - -triggered_by - - [VARCHAR(50)] - -triggering_user_name - - [VARCHAR(512)] - -updated_at - - [TIMESTAMP] + +dag_run + +id + + [INTEGER] + NOT NULL + +backfill_id + + [INTEGER] + +bundle_version + + [VARCHAR(250)] + +clear_number + + [INTEGER] + NOT NULL + +conf + + [JSONB] + +context_carrier + + [JSONB] + +created_dag_version_id + + [UUID] + +creating_job_id + + [INTEGER] + +dag_id + + [VARCHAR(250)] + NOT NULL + +data_interval_end + + [TIMESTAMP] + +data_interval_start + + [TIMESTAMP] + +end_date + + [TIMESTAMP] + +last_scheduling_decision + + [TIMESTAMP] + +log_template_id + + [INTEGER] + +logical_date + + [TIMESTAMP] + +queued_at + + [TIMESTAMP] + +run_after + + [TIMESTAMP] + NOT NULL + +run_id + + [VARCHAR(250)] + NOT NULL + +run_type + + [VARCHAR(50)] + NOT NULL + +scheduled_by_job_id + + [INTEGER] + +span_status + + [VARCHAR(250)] + NOT NULL + +start_date + + [TIMESTAMP] + +state + + [VARCHAR(50)] + +triggered_by + + [VARCHAR(50)] + +triggering_user_name + + [VARCHAR(512)] + +updated_at + + [TIMESTAMP] dag_version--dag_run - -0..N -{0,1} + +0..N +{0,1} dag_code - -dag_code - -id - - [UUID] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -dag_version_id - - [UUID] - NOT NULL - -fileloc - - [VARCHAR(2000)] - NOT NULL - -last_updated - - [TIMESTAMP] - NOT NULL - -source_code - - [TEXT] - NOT NULL - -source_code_hash - - [VARCHAR(32)] - NOT NULL + +dag_code + +id + + [UUID] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +dag_version_id + + [UUID] + NOT NULL + +fileloc + + [VARCHAR(2000)] + NOT NULL + +last_updated + + [TIMESTAMP] + NOT NULL + +source_code + + [TEXT] + NOT NULL + +source_code_hash + + [VARCHAR(32)] + NOT NULL dag_version--dag_code - -0..N -1 + +0..N +1 serialized_dag - -serialized_dag - -id - - [UUID] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -dag_hash - - [VARCHAR(32)] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -dag_version_id - - [UUID] - NOT NULL - -data - - [JSON] - -data_compressed - - [BYTEA] - -last_updated - - [TIMESTAMP] - NOT NULL + +serialized_dag + +id + + [UUID] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +dag_hash + + [VARCHAR(32)] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +dag_version_id + + [UUID] + NOT NULL + +data + + [JSON] + +data_compressed + + [BYTEA] + +last_updated + + [TIMESTAMP] + NOT NULL dag_version--serialized_dag - -0..N -1 + +0..N +1 dag_run--dagrun_asset_event - -0..N -1 + +0..N +1 dag_run--task_instance - -0..N -1 + +0..N +1 dag_run--task_instance - -0..N -1 + +0..N +1 dag_run--deadline - -0..N -{0,1} + +0..N +{0,1} backfill_dag_run - -backfill_dag_run - -id - - [INTEGER] - NOT NULL - -backfill_id - - [INTEGER] - NOT NULL - -dag_run_id - - [INTEGER] - -exception_reason - - [VARCHAR(250)] - -logical_date - - [TIMESTAMP] - NOT NULL - -sort_ordinal - - [INTEGER] - NOT NULL + +backfill_dag_run + +id + + [INTEGER] + NOT NULL + +backfill_id + + [INTEGER] + NOT NULL + +dag_run_id + + [INTEGER] + +exception_reason + + [VARCHAR(250)] + +logical_date + + [TIMESTAMP] + NOT NULL + +sort_ordinal + + [INTEGER] + NOT NULL dag_run--backfill_dag_run - -0..N -{0,1} + +0..N +{0,1} dag_run_note - -dag_run_note - -dag_run_id - - [INTEGER] - NOT NULL - -content - - [VARCHAR(1000)] - -created_at - - [TIMESTAMP] - NOT NULL - -updated_at - - [TIMESTAMP] - NOT NULL - -user_id - - [VARCHAR(128)] + +dag_run_note + +dag_run_id + + [INTEGER] + NOT NULL + +content + + [VARCHAR(1000)] + +created_at + + [TIMESTAMP] + NOT NULL + +updated_at + + [TIMESTAMP] + NOT NULL + +user_id + + [VARCHAR(128)] dag_run--dag_run_note - -1 -1 + +1 +1 log_template - -log_template - -id - - [INTEGER] - NOT NULL - -created_at - - [TIMESTAMP] - NOT NULL - -elasticsearch_id - - [TEXT] - NOT NULL - -filename - - [TEXT] - NOT NULL + +log_template + +id + + [INTEGER] + NOT NULL + +created_at + + [TIMESTAMP] + NOT NULL + +elasticsearch_id + + [TEXT] + NOT NULL + +filename + + [TEXT] + NOT NULL log_template--dag_run - -0..N -{0,1} + +0..N +{0,1} backfill - -backfill - -id - - [INTEGER] - NOT NULL - -completed_at - - [TIMESTAMP] - -created_at - - [TIMESTAMP] - NOT NULL - -dag_id - - [VARCHAR(250)] - NOT NULL - -dag_run_conf - - [JSON] - NOT NULL - -from_date - - [TIMESTAMP] - NOT NULL - -is_paused - - [BOOLEAN] - -max_active_runs - - [INTEGER] - NOT NULL - -reprocess_behavior - - [VARCHAR(250)] - NOT NULL - -to_date - - [TIMESTAMP] - NOT NULL - -triggering_user_name - - [VARCHAR(512)] - -updated_at - - [TIMESTAMP] - NOT NULL + +backfill + +id + + [INTEGER] + NOT NULL + +completed_at + + [TIMESTAMP] + +created_at + + [TIMESTAMP] + NOT NULL + +dag_id + + [VARCHAR(250)] + NOT NULL + +dag_run_conf + + [JSON] + NOT NULL + +from_date + + [TIMESTAMP] + NOT NULL + +is_paused + + [BOOLEAN] + +max_active_runs + + [INTEGER] + NOT NULL + +reprocess_behavior + + [VARCHAR(250)] + NOT NULL + +to_date + + [TIMESTAMP] + NOT NULL + +triggering_user_name + + [VARCHAR(512)] + +updated_at + + [TIMESTAMP] + NOT NULL backfill--dag_run - -0..N -{0,1} + +0..N +{0,1} backfill--backfill_dag_run - -0..N -1 + +0..N +1 alembic_version - -alembic_version - -version_num - - [VARCHAR(32)] - NOT NULL + +alembic_version + +version_num + + [VARCHAR(32)] + NOT NULL diff --git a/airflow-core/src/airflow/migrations/versions/0042_3_0_0_add_uuid_primary_key_to_task_instance_.py b/airflow-core/src/airflow/migrations/versions/0042_3_0_0_add_uuid_primary_key_to_task_instance_.py index df7965d38e934..c01d5e4463fab 100644 --- a/airflow-core/src/airflow/migrations/versions/0042_3_0_0_add_uuid_primary_key_to_task_instance_.py +++ b/airflow-core/src/airflow/migrations/versions/0042_3_0_0_add_uuid_primary_key_to_task_instance_.py @@ -114,28 +114,27 @@ BEGIN DECLARE unix_time_ms BIGINT; DECLARE time_hex CHAR(12); - DECLARE rand_hex CHAR(24); - DECLARE uuid CHAR(36); + DECLARE rand_hex CHAR(20); -- 10 bytes => 20 hex chars - -- Convert the passed timestamp to milliseconds since epoch - SET unix_time_ms = UNIX_TIMESTAMP(p_timestamp) * 1000; + -- milliseconds since epoch (truncation is fine for ms precision) + SET unix_time_ms = FLOOR(UNIX_TIMESTAMP(p_timestamp) * 1000); SET time_hex = LPAD(HEX(unix_time_ms), 12, '0'); - SET rand_hex = CONCAT( - LPAD(HEX(FLOOR(RAND() * POW(2,32))), 8, '0'), - LPAD(HEX(FLOOR(RAND() * POW(2,32))), 8, '0') - ); - SET rand_hex = CONCAT(SUBSTRING(rand_hex, 1, 4), '7', SUBSTRING(rand_hex, 6)); - SET rand_hex = CONCAT(SUBSTRING(rand_hex, 1, 12), '8', SUBSTRING(rand_hex, 14)); - - SET uuid = LOWER(CONCAT( + + -- 10 random bytes (CSPRNG), 20 hex chars + SET rand_hex = HEX(RANDOM_BYTES(10)); + + -- set version nibble to 7 (first of next 4 hex) + SET rand_hex = CONCAT('7', SUBSTRING(rand_hex, 2)); + -- set variant (first hex of next 4) to 8..b; using '8' keeps the top bits 10 + SET rand_hex = CONCAT(SUBSTRING(rand_hex, 1, 4), '8', SUBSTRING(rand_hex, 6)); + + RETURN LOWER(CONCAT( SUBSTRING(time_hex, 1, 8), '-', SUBSTRING(time_hex, 9, 4), '-', SUBSTRING(rand_hex, 1, 4), '-', SUBSTRING(rand_hex, 5, 4), '-', - SUBSTRING(rand_hex, 9) + SUBSTRING(rand_hex, 9, 12) )); - - RETURN uuid; END; """