Database migration making dataset uuid unique.

lib/galaxy/model/migrations/alembic/versions_gxy/04288b6a5b25_make_dataset_uuids_unique.py

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+"""make dataset uuids unique
+
+Revision ID: 04288b6a5b25
+Revises: eee9229a9765
+Create Date: 2024-07-24 10:43:48.162813
+"""
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.sql import text
+
+from galaxy.model.custom_types import UUIDType
+from galaxy.model.migrations.util import (
+    _is_sqlite,
+    create_unique_constraint,
+    drop_constraint,
+)
+
+# revision identifiers, used by Alembic.
+revision = "04288b6a5b25"
+down_revision = "eee9229a9765"
+branch_labels = None
+depends_on = None
+
+dataset_table_name = "dataset"
+uuid_column = "uuid"
+unique_constraint_name = "uq_uuid_column"
+
+# sqlite isn't production - ignore the fake uuid please
+# https://stackoverflow.com/questions/17277735/using-uuids-in-sqlite
+new_uuid = "lower(hex(randomblob(16)))" if _is_sqlite() else "REPLACE(gen_random_uuid()::text, '-', '')"
+
+DEBUG = False
+
+
+def upgrade():
+    connection = op.get_bind()
+
+    op.execute("DROP TABLE IF EXISTS duplicate_datasets_by_uuid")
+    op.execute("DROP TABLE IF EXISTS temp_duplicates_counts")
+    op.execute("DROP VIEW IF EXISTS temp_duplicate_datasets_purged")
+    op.execute("DROP VIEW IF EXISTS temp_duplicate_datasets_active")
+    op.execute("DROP TABLE IF EXISTS temp_latest_active_duplicate")
+    op.execute("DROP TABLE IF EXISTS temp_active_mapping")
+    op.execute("DROP TABLE IF EXISTS hda_datasaet_mapping_pre_uuid_condense")
+    op.execute("DROP TABLE IF EXISTS ldda_datasaet_mapping_pre_uuid_condense")
+
+    # Find and store duplicate UUIDs - create table temp_duplicates_counts
+    _setup_duplicate_counts(connection)
+
+    # Backup all dataset info for duplicated dataset table in
+    # table duplicate_datasets_by_uuid
+    _setup_backup_datasets_for_duplicated_uuids(connection)
+
+    # create views temp_duplicate_datasets_purged and temp_duplicate_datasets_active to
+    # join against in subsequent queries inspect this data
+    _setup_duplicated_dataset_views_by_purged_status(connection)
+
+    _find_latest_active_dataset_for_each_uuid(connection)  # and record in temp_latest_active_duplicate
+
+    _map_active_uuids_to_latest(connection)  # in temp table temp_active_mapping
+
+    _preserve_old_dataset_association_mappings(connection)
+
+    _randomize_uuids_for_purged_datasets_with_duplicated_uuids(connection)
+    _randomize_uuids_for_older_active_datasets_with_duplicated_uuids(connection)
+
+    _update_dataset_associations_to_point_to_latest_active_datasets(connection)
+
+    # cleanup all working tables except backups required to undo migration prcoess - these backups are
+    # duplicate_datasets_by_uuid, ldda_datasaet_mapping_pre_uuid_condense, hda_datasaet_mapping_pre_uuid_condense
+    op.execute("DROP VIEW IF EXISTS temp_duplicate_datasets_purged")
+    op.execute("DROP VIEW IF EXISTS temp_duplicate_datasets_active")
+    op.execute("DROP TABLE IF EXISTS temp_active_mapping")
+    op.execute("DROP TABLE IF EXISTS temp_latest_active_duplicate")
+    op.execute("DROP TABLE IF EXISTS temp_duplicates_counts")
+
+    # Add a unique constraint to the UUID column
+    create_unique_constraint(unique_constraint_name, dataset_table_name, [uuid_column])
+
+
+def downgrade():
+    connection = op.get_bind()
+
+    drop_constraint(unique_constraint_name, dataset_table_name)
+
+    _restore_old_mappings(connection)
+    _restore_dataset_uuids(connection)
+
+    # cleanup left behind untracked tables duplicate_datasets_by_uuid, ldda_datasaet_mapping_pre_uuid_condense, hda_datasaet_mapping_pre_uuid_condense
+    op.execute("DROP TABLE IF EXISTS duplicate_datasets_by_uuid")
+    op.execute("DROP TABLE IF EXISTS ldda_datasaet_mapping_pre_uuid_condense")
+    op.execute("DROP TABLE IF EXISTS hda_datasaet_mapping_pre_uuid_condense")
+
+
+def _restore_old_mappings(connection):
+    restore_hda_dataset_ids = text(
+        f"""
+        UPDATE history_dataset_association
+        SET dataset_id=mapping.old_dataset_id
+        FROM hda_datasaet_mapping_pre_uuid_condense AS mapping
+        WHERE mapping.id = history_dataset_association.id
+        """
+    )
+    connection.execute(restore_hda_dataset_ids)
+    restore_ldda_dataset_ids = text(
+        f"""
+        UPDATE library_dataset_dataset_association
+        SET dataset_id=mapping.old_dataset_id
+        FROM ldda_datasaet_mapping_pre_uuid_condense as mapping
+        WHERE mapping.id = library_dataset_dataset_association.id
+        """
+    )
+    connection.execute(restore_ldda_dataset_ids)
+
+
+def _restore_dataset_uuids(connection):
+    restore_ldda_dataset_ids = text(
+        f"""
+        UPDATE {dataset_table_name}
+        SET {uuid_column}=backup_datasets.{uuid_column}
+        FROM duplicate_datasets_by_uuid as backup_datasets
+        WHERE backup_datasets.id = {dataset_table_name}.id
+        """
+    )
+    connection.execute(restore_ldda_dataset_ids)
+
+
+def _setup_duplicate_counts(connection):
+    duplicate_counts_query = text(
+        f"""
+        CREATE TEMP TABLE temp_duplicates_counts AS
+        SELECT {uuid_column}, COUNT(*)
+        FROM {dataset_table_name}
+        GROUP BY {uuid_column}
+        HAVING COUNT(*) > 1
+        """
+    )
+    connection.execute(duplicate_counts_query)
+
+
+def _setup_backup_datasets_for_duplicated_uuids(connection):
+    duplicate_datasets = text(
+        f"""
+        CREATE TABLE duplicate_datasets_by_uuid AS
+        SELECT *
+        FROM {dataset_table_name}
+        WHERE {uuid_column} IN (select {uuid_column} from temp_duplicates_counts)
+        """
+    )
+    connection.execute(duplicate_datasets)
+
+
+def _setup_duplicated_dataset_views_by_purged_status(connection):
+    duplicate_purged_datasets_query = text(
+        f"""
+        CREATE TEMP VIEW temp_duplicate_datasets_purged AS
+        SELECT *
+        FROM duplicate_datasets_by_uuid
+        WHERE purged = true
+        """
+    )
+    connection.execute(duplicate_purged_datasets_query)
+
+    duplicate_active_datasets_query = text(
+        f"""
+        CREATE TEMP VIEW temp_duplicate_datasets_active AS
+        SELECT *
+        FROM duplicate_datasets_by_uuid
+        WHERE purged = false
+        """
+    )
+    connection.execute(duplicate_active_datasets_query)
+    _debug(connection, "purged duplicated", text("select count(*) from temp_duplicate_datasets_purged"))
+    _debug(connection, "active duplicated", text("select count(*) from temp_duplicate_datasets_active"))
+
+
+def _find_latest_active_dataset_for_each_uuid(connection):
+    latest_active_duplicate_query = text(
+        f"""
+        CREATE TEMP TABLE temp_latest_active_duplicate AS
+        SELECT {uuid_column}, MAX(id) as latest_dataset_id
+        FROM temp_duplicate_datasets_active
+        GROUP BY {uuid_column}
+        """
+    )
+    connection.execute(latest_active_duplicate_query)
+    debug_query = text("select * from temp_latest_active_duplicate")
+    _debug(connection, "latest active table", debug_query)
+
+
+def _map_active_uuids_to_latest(connection):
+    active_mapping_query = text(
+        f"""
+        CREATE TEMP TABLE temp_active_mapping AS
+        SELECT d.id as from_dataset_id, l.latest_dataset_id as to_dataset_id, l.{uuid_column} as uuid
+        FROM temp_duplicate_datasets_active as d
+        LEFT JOIN temp_latest_active_duplicate l ON d.{uuid_column} = l.{uuid_column}
+        """
+    )
+    connection.execute(active_mapping_query)
+    debug_query = text("select * from temp_active_mapping")
+    _debug(connection, "temp active mapping", debug_query)
+    debug_query = text("select * from temp_active_mapping as m where m.from_dataset_id != m.to_dataset_id")
+    _debug(connection, "temp active mapping older...", debug_query)
+
+
+def _randomize_uuids_for_purged_datasets_with_duplicated_uuids(connection):
+    updated_purged_uuids = text(
+        f"""
+        UPDATE {dataset_table_name}
+        SET uuid={new_uuid}
+        WHERE {uuid_column} IN (SELECT {uuid_column} FROM temp_duplicate_datasets_purged) AND purged = true
+        """
+    )
+    connection.execute(updated_purged_uuids)
+
+
+def _randomize_uuids_for_older_active_datasets_with_duplicated_uuids(connection):
+    # sanity check...
+    duplicate_datasets_with_uuid_of_latest_active_uuid = text(
+        f"""
+        SELECT COUNT(*)
+        FROM {dataset_table_name} as d
+        INNER JOIN temp_active_mapping AS a ON d.uuid = a.uuid
+        GROUP BY d.{uuid_column}
+        HAVING COUNT(*) > 1
+        """
+    )
+    _debug(
+        connection,
+        "(before) duplicate_datasets_with_uuid_of_latest_active_uuid",
+        duplicate_datasets_with_uuid_of_latest_active_uuid,
+    )
+
+    update_older_datasets = text(
+        f"""
+        UPDATE {dataset_table_name}
+        SET uuid={new_uuid}
+        WHERE EXISTS
+            (
+                SELECT *
+                FROM temp_active_mapping as m
+                where m.from_dataset_id = ID and m.from_dataset_id != m.to_dataset_id
+            )
+        """
+    )
+    connection.execute(update_older_datasets)
+
+    _debug(
+        connection,
+        "(after) unique_datasets_with_uuid_of_latest_active_uuid",
+        unique_datasets_with_uuid_of_latest_active_uuid,
+    )
+    _debug(
+        connection,
+        "(after) duplicate_datasets_with_uuid_of_latest_active_uuid",
+        duplicate_datasets_with_uuid_of_latest_active_uuid,
+    )
+
+    duplicate_active_count = text(
+        f"""
+        SELECT COUNT(*)
+        FROM temp_active_mapping
+        """
+    )
+    _debug(connection, "(after) duplicate_active_count", duplicate_active_count)
+    datasets_with_originally_duplicated_uuids = text(
+        f"""
+        SELECT COUNT(*)
+        FROM {dataset_table_name} as d
+        INNER JOIN temp_active_mapping AS a ON d.uuid = a.uuid
+        """
+    )
+    _debug(connection, "(after) datasets_with_originally_duplicated_uuids", datasets_with_originally_duplicated_uuids)
+
+
+def _update_dataset_associations_to_point_to_latest_active_datasets(connection):
+    # for others select one dataset to represent the dataset in HDAs/LDDAs
+    update_hda_links = text(
+        f"""
+        UPDATE history_dataset_association
+        SET dataset_id=t.to_dataset_id
+        FROM temp_active_mapping t
+        WHERE t.from_dataset_id = dataset_id
+        """
+    )
+    connection.execute(update_hda_links)
+    update_ldda_links = text(
+        f"""
+        UPDATE library_dataset_dataset_association
+        SET dataset_id=t.to_dataset_id
+        FROM temp_active_mapping t
+        WHERE t.from_dataset_id = dataset_id
+        """
+    )
+    connection.execute(update_ldda_links)
+
+
+def _preserve_old_dataset_association_mappings(connection):
+    old_hda_mappings = text(
+        f"""
+        CREATE TABLE hda_datasaet_mapping_pre_uuid_condense AS
+        SELECT h.id as id, d.id as old_dataset_id
+         FROM history_dataset_association AS h
+         INNER JOIN dataset AS d ON h.dataset_id = d.id
+         INNER JOIN duplicate_datasets_by_uuid AS duplicates ON d.{uuid_column} = duplicates.{uuid_column}
+        """
+    )
+    connection.execute(old_hda_mappings)
+    old_ldda_mappings = text(
+        f"""
+        CREATE TABLE ldda_datasaet_mapping_pre_uuid_condense AS
+         SELECT l.id as id, d.id as old_dataset_id
+         FROM library_dataset_dataset_association aS l
+         INNER JOIN dataset AS d ON l.dataset_id = d.id
+         INNER JOIN duplicate_datasets_by_uuid AS duplicates ON d.{uuid_column} = duplicates.{uuid_column}
+        """
+    )
+    connection.execute(old_ldda_mappings)
+
+
+def _debug(connection, log_msg, query):
+    if DEBUG:
+        result = connection.execute(query)
+        print(f"{log_msg} {result.all()}")