diff options
Diffstat (limited to 'db/migrate/20221122210711_add_columns_to_postgres_foreign_keys.rb')
-rw-r--r-- | db/migrate/20221122210711_add_columns_to_postgres_foreign_keys.rb | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/db/migrate/20221122210711_add_columns_to_postgres_foreign_keys.rb b/db/migrate/20221122210711_add_columns_to_postgres_foreign_keys.rb new file mode 100644 index 00000000000..bef05e52a3a --- /dev/null +++ b/db/migrate/20221122210711_add_columns_to_postgres_foreign_keys.rb @@ -0,0 +1,54 @@ +# frozen_string_literal: true + +class AddColumnsToPostgresForeignKeys < Gitlab::Database::Migration[2.0] + def up + execute(<<~SQL) + CREATE OR REPLACE VIEW postgres_foreign_keys AS + SELECT + pg_constraint.oid AS oid, + pg_constraint.conname AS name, + constrained_namespace.nspname::text || '.'::text || constrained_table.relname::text AS constrained_table_identifier, + referenced_namespace.nspname::text || '.'::text || referenced_table.relname::text AS referenced_table_identifier, + constrained_table.relname::text AS constrained_table_name, + referenced_table.relname::text AS referenced_table_name, + constrained_cols.constrained_columns, + referenced_cols.referenced_columns, + pg_constraint.confdeltype AS on_delete_action, + pg_constraint.coninhcount > 0 as is_inherited + FROM pg_constraint + INNER JOIN pg_class constrained_table ON constrained_table.oid = pg_constraint.conrelid + INNER JOIN pg_class referenced_table ON referenced_table.oid = pg_constraint.confrelid + INNER JOIN pg_namespace constrained_namespace ON constrained_table.relnamespace = constrained_namespace.oid + INNER JOIN pg_namespace referenced_namespace ON referenced_table.relnamespace = referenced_namespace.oid + CROSS JOIN LATERAL ( + SELECT array_agg(pg_attribute.attname ORDER BY conkey.idx) -- must order here so that attributes are in correct order in array + FROM unnest(pg_constraint.conkey) WITH ORDINALITY conkey(attnum, idx) + INNER JOIN pg_attribute ON pg_attribute.attnum = conkey.attnum AND pg_attribute.attrelid = constrained_table.oid + ) constrained_cols(constrained_columns) + CROSS JOIN LATERAL ( + SELECT array_agg(pg_attribute.attname ORDER BY confkey.idx) + FROM unnest(pg_constraint.confkey) WITH ORDINALITY confkey(attnum, idx) + INNER JOIN pg_attribute ON pg_attribute.attnum = confkey.attnum AND pg_attribute.attrelid = referenced_table.oid + ) referenced_cols(referenced_columns) + WHERE contype = 'f'; + SQL + end + + def down + execute(<<~SQL) + DROP VIEW IF EXISTS postgres_foreign_keys; + CREATE OR REPLACE VIEW postgres_foreign_keys AS + SELECT + pg_constraint.oid AS oid, + pg_constraint.conname AS name, + constrained_namespace.nspname::text || '.'::text || constrained_table.relname::text AS constrained_table_identifier, + referenced_namespace.nspname::text || '.'::text || referenced_table.relname::text AS referenced_table_identifier + FROM pg_constraint + INNER JOIN pg_class constrained_table ON constrained_table.oid = pg_constraint.conrelid + INNER JOIN pg_class referenced_table ON referenced_table.oid = pg_constraint.confrelid + INNER JOIN pg_namespace constrained_namespace ON constrained_table.relnamespace = constrained_namespace.oid + INNER JOIN pg_namespace referenced_namespace ON referenced_table.relnamespace = referenced_namespace.oid + WHERE contype = 'f'; + SQL + end +end |