new table

_sql/migrations/2025-07-23-200905_prompt_context_items/down.sql

@@ -0,0 +1,5 @@
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+DROP TABLE prompt_context_items;

_sql/migrations/2025-07-23-200905_prompt_context_items/up.sql

@@ -0,0 +1,30 @@
+-- noinspection SqlDialectInspectionForFile
+-- noinspection SqlNoDataSourceInspectionForFile
+-- noinspection SqlResolveForFile
+
+-- An n:m join table between prompts and media_files.
+-- This associates mostly image media files with prompts, though we could conceivably
+-- also store 3D sets, etc.
+CREATE TABLE prompt_context_items (
+  -- Not used for anything except replication.
+  id BIGINT(20) NOT NULL AUTO_INCREMENT,
+
+  -- The semantic type of context.
+  context_semantic_type VARCHAR(16) NOT NULL,
+
+  -- Foreign key, many-to-many
+  -- There is no uniqueness constraint for (prompt_token, media_token) because a user
+  -- might attach many duplicate images to the same prompt.
+  prompt_token VARCHAR(32) NOT NULL,
+
+  -- Foreign key to the media token
+  -- There is no uniqueness constraint for (prompt_token, media_token) because a user
+  -- might attach many duplicate images to the same prompt.
+  media_token VARCHAR(32) NOT NULL,
+
+  -- INDICES --
+  PRIMARY KEY (id),
+  KEY index_prompt_token (prompt_token),
+  KEY index_media_token (media_token)
+
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;