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CREATE TABLE IF NOT EXISTS image(
sha1 TEXT NOT NULL, -- SHA-1 hash of file in lowercase hexadecimal
thumbw INTEGER, -- cached thumbnail width, if known
thumbh INTEGER, -- cached thumbnail height, if known
dhash INTEGER, -- uint64 perceptual hash as a signed integer
PRIMARY KEY (sha1)
) STRICT;
CREATE INDEX IF NOT EXISTS image_dhash ON image(dhash, sha1);
--
CREATE TABLE IF NOT EXISTS directory(
id INTEGER NOT NULL, -- unique ID
name TEXT NOT NULL, -- basename
parent INTEGER REFERENCES directory(id), -- root if NULL
PRIMARY KEY (id)
) STRICT;
CREATE UNIQUE INDEX IF NOT EXISTS directory_parent ON directory(parent, name);
CREATE TABLE IF NOT EXISTS entry(
parent INTEGER REFERENCES directory(id),
name TEXT NOT NULL, -- last FS path component
mtime INTEGER NOT NULL, -- Unix time of last modification in seconds
sha1 TEXT NOT NULL REFERENCES image(sha1),
PRIMARY KEY (parent, name)
) STRICT;
CREATE INDEX IF NOT EXISTS entry_sha1 ON entry(sha1, parent, name);
--
CREATE TABLE IF NOT EXISTS image_tag(
sha1 TEXT NOT NULL REFERENCES image(sha1),
tag TEXT NOT NULL,
PRIMARY KEY (sha1)
) STRICT;
-- XXX: Perhaps this should be more like namespaces.
CREATE TABLE IF NOT EXISTS image_autotag(
sha1 TEXT NOT NULL REFERENCES image(sha1),
tag TEXT NOT NULL,
weight REAL NOT NULL, -- 0..1 normalized weight assigned to tag
PRIMARY KEY (sha1, tag)
) STRICT;
CREATE INDEX IF NOT EXISTS image_autotag_tag ON image_autotag(tag, sha1);
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