reference schemas

_sql/migrations_squashed/batch_generations.sql

@@ -0,0 +1,42 @@
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+-- Batch generations
+CREATE TABLE batch_generations (
+  -- Not used for anything except replication.
+  id BIGINT(20) NOT NULL AUTO_INCREMENT,
+
+  -- The batch token
+  -- This is **NOT** a unique token.
+  token VARCHAR(32) NOT NULL,
+
+  -- ========== ENTITY LINKAGE ==========
+
+  -- The type of record this is attached to
+  -- Currently supported values:
+  --   * 'model_weight'
+  --   * 'media_file'
+  --   * 'comment'
+  entity_type VARCHAR(32) NOT NULL,
+
+  -- The token for the record.
+  entity_token VARCHAR(32) NOT NULL,
+
+  -- ========== TIMESTAMPS ==========
+
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+
+  -- INDICES --
+  PRIMARY KEY (id),
+  UNIQUE KEY (token, entity_type, entity_token),
+  KEY index_token (token),
+  KEY index_entity_token (entity_token)
+
+  -- NB: Realistically, we probably don't need this index until we have a lot of entity types, and the entity_token
+  -- entropy is probably sufficient enough as-is.
+  -- KEY index_entity_type_and_token (entity_type, entity_token),
+
+
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;