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107 lines
3.0 KiB
SQL
107 lines
3.0 KiB
SQL
-- Add migration script here
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PRAGMA foreign_keys= off;
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-- create backup files table
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ALTER TABLE files
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RENAME TO _files_old;
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-- create backup hashes table
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ALTER TABLE hashes
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RENAME TO _hashes_old;
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-- create backup hash_tag_mappings table
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ALTER TABLE hash_tag_mappings
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RENAME TO _hash_tag_mappings_old;
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-- create backup hash_source_mappings table
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ALTER TABLE hash_source_mappings
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RENAME TO _hash_source_mappings_old;
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-- create content id table
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CREATE TABLE content_descriptors
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(
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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descriptor BLOB NOT NULL
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);
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CREATE UNIQUE INDEX content_descriptor_values ON content_descriptors (descriptor);
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-- create content-id tag mappings table
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CREATE TABLE cd_tag_mappings
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(
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cd_id INTEGER NOT NULL REFERENCES content_descriptors (id),
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tag_id INTEGER NOT NULL REFERENCES tags (id),
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PRIMARY KEY (cd_id, tag_id)
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);
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CREATE UNIQUE INDEX content_descriptor_tag_mapping_unique ON cd_tag_mappings (cd_id, tag_id);
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CREATE INDEX content_descriptor_tag_mapping_tag ON cd_tag_mappings (tag_id);
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-- create content-id source mappings table
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CREATE TABLE cd_source_mappings
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(
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cd_id INTEGER NOT NULL REFERENCES content_descriptors (id),
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source_id INTEGER NOT NULL REFERENCES sources (id),
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PRIMARY KEY (cd_id, source_id)
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);
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CREATE UNIQUE INDEX content_descriptor_source_mapping_unique ON cd_source_mappings (cd_id, source_id);
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-- create new files table
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CREATE TABLE files
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(
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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status INTEGER NOT NULL DEFAULT 10,
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storage_id INTEGER NOT NULL REFERENCES storage_locations (id),
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cd_id INTEGER NOT NULL REFERENCES content_descriptors (id),
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mime_type VARCHAR(128) NOT NULL DEFAULT 'application/octet-stream'
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);
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CREATE INDEX files_contend_descriptor ON files (cd_id);
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-- create metadata table
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CREATE TABLE file_metadata
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(
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file_id INTEGER PRIMARY KEY REFERENCES files (id),
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size INTEGER NOT NULL,
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name VARCHAR(128),
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comment VARCHAR(1024),
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import_time DATETIME NOT NULL,
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creation_time DATETIME NOT NULL,
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change_time DATETIME NOT NULL
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);
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CREATE UNIQUE INDEX file_metadata_file_id_unique ON file_metadata (file_id);
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-- add content identifiers from hashes table
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INSERT INTO content_descriptors
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SELECT id, value
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FROM _hashes_old;
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-- add files from files table
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INSERT INTO files (id, storage_id, cd_id, mime_type)
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SELECT id, storage_id, hash_id AS content_id, mime_type
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FROM _files_old;
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-- add metadata from files table
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INSERT INTO file_metadata
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SELECT id AS file_id, size, name, comment, import_time, creation_time, change_time
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FROM _files_old;
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-- add content tag mappings
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INSERT INTO cd_tag_mappings
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SELECT hash_id AS content_id, tag_id
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FROM _hash_tag_mappings_old;
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-- add content id source mappings
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INSERT INTO cd_source_mappings
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SELECT hash_id AS content_id, source_id
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FROM _hash_source_mappings_old;
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-- drop all old tables
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DROP TABLE _hash_source_mappings_old;
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DROP TABLE _hash_tag_mappings_old;
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DROP TABLE _files_old;
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DROP TABLE _hashes_old;
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pragma foreign_keys= on; |