akm-cli/dist/storage/repositories/index-entry-schema.js

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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
/**
 * The derived `entries` layout: DDL plus the layout marker.
 *
 * `index_meta.version` is a layout marker. An older layout is never refused:
 * readers serve what is there, and the writable opener (`ensureSchema`,
 * `index-schema.ts`) brings it up to date in place — added and dropped
 * columns, retired tables dropped, a one-time full-text rebuild — without
 * touching embeddings, utility scores, or the LLM enrichment cache (the one
 * exception is the LLM entity graph, unconditionally dropped since its
 * retirement in 0.9.17-alpha.9). A newer layout is refused, naming the
 * upgrade.
 */
// 26: declared links (#935) live in `asset_links`, one row per link, owned by
// the entry that declares it. The writable opener derives them in place from
// each entry's stored `document_json` (`migrateToDeclaredLinks`,
// index-schema.ts); releases before 26 did not store them.
// 25: vectors live only in `embeddings`; the sqlite-vec mirror `entries_vec`
// is dropped (`dropVecMirror`, index-schema.ts), and so is the fragment FTS
// table `entry_fragments_fts`, which search no longer reads. `entries` keeps
// a hash of each entry's embedding input (`embed_hash`) instead of the text
// (`search_text`); the text is derived from `document_json` when embedding.
// 24: the FTS5 tables are contentless (`content=''`) — the indexed text lives
// once, in `entries` / `entry_fragments`, and FTS rows are keyed by rowid only.
// 23 and earlier stored a second copy of every indexed field in FTS5's own
// content shadow tables. `ensureFtsLayout` (index-schema.ts) rebuilds the FTS
// tables from the stored entries when it finds the older layout.
export const CANONICAL_INDEX_DB_VERSION = 26;
export const CANONICAL_ENTRY_SCHEMA_SQL = `
  CREATE TABLE IF NOT EXISTS entries (
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    item_ref      TEXT NOT NULL UNIQUE,
    bundle_id     TEXT NOT NULL,
    component_id  TEXT NOT NULL,
    concept_id    TEXT NOT NULL,
    adapter_id    TEXT NOT NULL,
    type          TEXT NOT NULL,
    file_path     TEXT NOT NULL,
    content_hash  TEXT,
    document_json TEXT NOT NULL,
    derived_from  TEXT,
    embed_hash    TEXT
  );

  CREATE INDEX IF NOT EXISTS idx_entries_bundle ON entries(bundle_id);
  CREATE INDEX IF NOT EXISTS idx_entries_type ON entries(type);
  CREATE INDEX IF NOT EXISTS idx_entries_file_path ON entries(file_path);
  CREATE INDEX IF NOT EXISTS idx_entries_derived_from ON entries(derived_from);

  CREATE TABLE IF NOT EXISTS entry_fragments (
    entry_id INTEGER PRIMARY KEY REFERENCES entries(id) ON DELETE CASCADE,
    safe_markdown TEXT NOT NULL
  );

  -- Declared links (#935). dst_bundle NULL: the declaring entry's own bundle.
  CREATE TABLE IF NOT EXISTS asset_links (
    entry_id    INTEGER NOT NULL REFERENCES entries(id) ON DELETE CASCADE,
    ord         INTEGER NOT NULL,
    kind        TEXT NOT NULL,
    raw         TEXT NOT NULL,
    dst_bundle  TEXT,
    dst_concept TEXT NOT NULL,
    PRIMARY KEY (entry_id, ord)
  ) WITHOUT ROWID;

  CREATE INDEX IF NOT EXISTS idx_asset_links_dst ON asset_links(dst_concept);
`;
// The FTS table is contentless: FTS5 keeps only the inverted index, and a row
// is addressed by its rowid (`entries_fts.rowid = entries.id`, see
// index-fts-repository.ts). `contentless_delete=1` lets a row be deleted by
// rowid alone — an external-content table would instead need the exact text
// originally indexed, which is derived in JS from `document_json`
// (`buildSearchFields`) and would corrupt the index the first time that
// derivation changed. The UNINDEXED columns store nothing and read back NULL;
// they stay declared so the insert statements and the readers'
// `COALESCE(f.entry_id, f.rowid)` joins are valid against both this layout
// and the content-bearing one older releases wrote — which is also the
// layout written when the linked SQLite predates `contentless_delete` (3.43,
// e.g. the macOS 13 system library Bun links there).
const CONTENTLESS_OPTIONS = "content='', contentless_delete=1,";
export function entriesFtsDdl(contentless) {
    return `
  CREATE VIRTUAL TABLE IF NOT EXISTS entries_fts USING fts5(
    entry_id UNINDEXED, name, description, tags, hints, content,
    ${contentless ? CONTENTLESS_OPTIONS : ""} tokenize='porter unicode61'
  );`;
}
/** Whether the linked SQLite's FTS5 supports `contentless_delete` (3.43.0+). */
export function supportsContentlessDelete(db) {
    const version = db.prepare("SELECT sqlite_version() AS version").get().version;
    const [major = 0, minor = 0] = version.split(".").map(Number);
    return major > 3 || (major === 3 && minor >= 43);
}
function sqlString(value) {
    return `'${value.replaceAll("'", "''")}'`;
}
export function readTableSql(db, name) {
    const row = db.prepare(`SELECT sql FROM sqlite_master WHERE type = 'table' AND name = ${sqlString(name)}`).get();
    return row?.sql ?? null;
}
export function tableExists(db, name) {
    return readTableSql(db, name) !== null;
}
/**
 * Columns this release's readers need in `entries` (layout 21+). The writable
 * opener adds `embed_hash` to an older table, so it is not required here.
 */
const REQUIRED_ENTRY_COLUMNS = [
    "id",
    "item_ref",
    "bundle_id",
    "component_id",
    "concept_id",
    "adapter_id",
    "type",
    "file_path",
    "content_hash",
    "document_json",
    "derived_from",
];
/** Required `entries` columns the table lacks; every column when there is no `entries` table. */
export function missingEntryColumns(db) {
    const present = new Set(db.prepare("PRAGMA table_info(entries)").all().map((c) => c.name));
    return REQUIRED_ENTRY_COLUMNS.filter((column) => !present.has(column));
}
/**
 * Whether an index database has an `entries` table this release can read. A
 * fresh or empty file has none; an index older than layout 21 has one keyed
 * by columns this release no longer reads, and serves nothing until the next
 * `akm index` recreates it.
 */
export function hasCurrentEntriesTable(db) {
    try {
        return missingEntryColumns(db).length === 0;
    }
    catch {
        return false;
    }
}
/** True when an FTS5 table's DDL declares the contentless layout this release writes. */
export function isContentlessFtsDdl(sql) {
    return sql !== null && /content\s*=\s*''/.test(sql);
}