Add MariaDB queue table. Fix Bugs

dist/functions/grab-mariadb-client.js

@@ -4,6 +4,8 @@ import {} from "../types";
 import { SQL } from "bun";
 /** Reuse one client per distinct connection config to avoid exhausting MariaDB connections. */
 const clientCache = new Map();
+/** Cache key each client was created with */
+const clientKeys = new WeakMap();
 /**
  * Cache key covering everything that affects the connection, not just the
  * database name.
@@ -24,8 +26,7 @@ export default function grabMariaDBClient({ config, }) {
     }
     // Prefer the process-wide client when it was created from the same config
     if (global.MARIADB_CLIENT &&
-        global.CONFIG &&
-        mariadbClientCacheKey(global.CONFIG) === cacheKey) {
+        clientKeys.get(global.MARIADB_CLIENT) === cacheKey) {
         clientCache.set(cacheKey, global.MARIADB_CLIENT);
         return global.MARIADB_CLIENT;
     }
@@ -53,6 +54,21 @@ export default function grabMariaDBClient({ config, }) {
             ...config.db_config,
             adapter: "mariadb",
         });
+        /**
+         * A closed client can't run queries, so forget it on close: the next
+         * grab (or `ensureInit`) creates a fresh one.
+         */
+        const close = MariaDBClient.close.bind(MariaDBClient);
+        MariaDBClient.close = (...args) => {
+            if (clientCache.get(cacheKey) === MariaDBClient) {
+                clientCache.delete(cacheKey);
+            }
+            if (global.MARIADB_CLIENT === MariaDBClient) {
+                global.MARIADB_CLIENT = undefined;
+            }
+            return close(...args);
+        };
+        clientKeys.set(MariaDBClient, cacheKey);
         clientCache.set(cacheKey, MariaDBClient);
         return MariaDBClient;
     }

dist/functions/init.d.ts

@@ -5,7 +5,8 @@ import { type BunMariaDBConfig, type BUN_MARIADB_DatabaseSchemaType } from "../t
 declare global {
     var CONFIG: BunMariaDBConfig;
     var DB_SCHEMA: BUN_MARIADB_DatabaseSchemaType;
-    var MARIADB_CLIENT: Bun.SQL;
+    /** Unset after the client is closed */
+    var MARIADB_CLIENT: Bun.SQL | undefined;
     var CONFIG_FILE_PATH: string;
     var SCHEMA_FILE_PATH: string;
 }

dist/index.d.ts

@@ -3,6 +3,12 @@ import DbInsert from "./lib/mariadb/db-insert";
 import DbSelect from "./lib/mariadb/db-select";
 import DbSQL from "./lib/mariadb/db-sql";
 import DbUpdate from "./lib/mariadb/db-update";
+import QueueAck from "./lib/queue/queue-ack";
+import QueueCancel from "./lib/queue/queue-cancel";
+import QueueClaim from "./lib/queue/queue-claim";
+import QueueExtend from "./lib/queue/queue-extend";
+import QueueFail from "./lib/queue/queue-fail";
+import QueuePush from "./lib/queue/queue-push";
 import grabDbSchema from "./utils/grab-db-schema";
 import grabJoinFieldsFromQueryObject from "./utils/grab-join-fields-from-query-object";
 declare const BunMariaDB: {
@@ -11,6 +17,14 @@ declare const BunMariaDB: {
     readonly update: typeof DbUpdate;
     readonly delete: typeof DbDelete;
     readonly sql: typeof DbSQL;
+    readonly queue: {
+        readonly push: typeof QueuePush;
+        readonly claim: typeof QueueClaim;
+        readonly ack: typeof QueueAck;
+        readonly fail: typeof QueueFail;
+        readonly extend: typeof QueueExtend;
+        readonly cancel: typeof QueueCancel;
+    };
     readonly utils: {
         readonly grab_db_schema: typeof grabDbSchema;
         readonly grab_join_fields_from_query_object: typeof grabJoinFieldsFromQueryObject;
@@ -18,4 +32,4 @@ declare const BunMariaDB: {
 };
 export default BunMariaDB;
 export type * from "./types";
-export { UsersOmitedFields, MariaDBCollations, MariaDBCharsets, TextFieldTypesArray, BUN_MARIADB_DATATYPES, MariaDBIndexTypes, ServerQueryOperators, ServerQueryEqualities, SQlComparisons, DataCrudRequestMethods, DataCrudRequestMethodsLowerCase, DsqlCrudActions, QueryFields, DockerComposeServices, IndexTypes, DefaultFields, RequiredENVs, } from "./types";
+export { UsersOmitedFields, MariaDBCollations, MariaDBCharsets, TextFieldTypesArray, BUN_MARIADB_DATATYPES, MariaDBIndexTypes, ServerQueryOperators, ServerQueryEqualities, SQlComparisons, DataCrudRequestMethods, DataCrudRequestMethodsLowerCase, DsqlCrudActions, QueryFields, DockerComposeServices, IndexTypes, DefaultFields, QueueStatuses, QueueFields, QueueProtectedFields, RequiredENVs, } from "./types";

dist/index.js

@@ -4,6 +4,12 @@ import DbInsert from "./lib/mariadb/db-insert";
 import DbSelect from "./lib/mariadb/db-select";
 import DbSQL from "./lib/mariadb/db-sql";
 import DbUpdate from "./lib/mariadb/db-update";
+import QueueAck from "./lib/queue/queue-ack";
+import QueueCancel from "./lib/queue/queue-cancel";
+import QueueClaim from "./lib/queue/queue-claim";
+import QueueExtend from "./lib/queue/queue-extend";
+import QueueFail from "./lib/queue/queue-fail";
+import QueuePush from "./lib/queue/queue-push";
 import grabDbSchema from "./utils/grab-db-schema";
 import grabJoinFieldsFromQueryObject from "./utils/grab-join-fields-from-query-object";
 /**
@@ -22,10 +28,18 @@ const BunMariaDB = {
     update: withInit(DbUpdate),
     delete: withInit(DbDelete),
     sql: withInit(DbSQL),
+    queue: {
+        push: withInit(QueuePush),
+        claim: withInit(QueueClaim),
+        ack: withInit(QueueAck),
+        fail: withInit(QueueFail),
+        extend: withInit(QueueExtend),
+        cancel: withInit(QueueCancel),
+    },
     utils: {
         grab_db_schema: withInit(grabDbSchema),
         grab_join_fields_from_query_object: grabJoinFieldsFromQueryObject,
     },
 };
 export default BunMariaDB;
-export { UsersOmitedFields, MariaDBCollations, MariaDBCharsets, TextFieldTypesArray, BUN_MARIADB_DATATYPES, MariaDBIndexTypes, ServerQueryOperators, ServerQueryEqualities, SQlComparisons, DataCrudRequestMethods, DataCrudRequestMethodsLowerCase, DsqlCrudActions, QueryFields, DockerComposeServices, IndexTypes, DefaultFields, RequiredENVs, } from "./types";
+export { UsersOmitedFields, MariaDBCollations, MariaDBCharsets, TextFieldTypesArray, BUN_MARIADB_DATATYPES, MariaDBIndexTypes, ServerQueryOperators, ServerQueryEqualities, SQlComparisons, DataCrudRequestMethods, DataCrudRequestMethodsLowerCase, DsqlCrudActions, QueryFields, DockerComposeServices, IndexTypes, DefaultFields, QueueStatuses, QueueFields, QueueProtectedFields, RequiredENVs, } from "./types";

dist/lib/db-handler.js

@@ -1,4 +1,4 @@
-import grabMariaDBClient, { mariadbClientCacheKey, } from "../functions/grab-mariadb-client";
+import grabMariaDBClient from "../functions/grab-mariadb-client";
 /**
  * Resolve a shared MariaDB client. Prefer the global client so schema sync
  * and CRUD do not open a new connection per query.
@@ -7,13 +7,7 @@ export function resolveClient(config) {
     if (!config) {
         return global.MARIADB_CLIENT;
     }
-    // Same connection config as the global client → reuse it
-    if (global.MARIADB_CLIENT &&
-        (!global.CONFIG ||
-            mariadbClientCacheKey(config) ===
-                mariadbClientCacheKey(global.CONFIG))) {
-        return global.MARIADB_CLIENT;
-    }
+    // Returns the global client when it was created from the same config
     return grabMariaDBClient({ config });
 }
 /**

dist/lib/mariadb/db-delete.js

@@ -2,6 +2,7 @@ import dbHandler from "../db-handler";
 import _ from "lodash";
 import sqlGenerator from "../../utils/sql-generator";
 import { quoteIdentifier } from "../../utils/sql-identifier";
+import { isQueueTable, QUEUE_NOT_CLAIMED_SQL } from "../queue/queue-utils";
 export default async function DbDelete({ table, query, targetId, config, }) {
     let sqlObj = null;
     try {
@@ -11,7 +12,7 @@ export default async function DbDelete({ table, query, targetId, config, }) {
             genObject: finalQuery,
             targetId,
         });
-        const whereClause = sqlObj.where;
+        let whereClause = sqlObj.where;
         if (!whereClause) {
             return {
                 success: false,
@@ -21,6 +22,9 @@ export default async function DbDelete({ table, query, targetId, config, }) {
                 },
             };
         }
+        if (isQueueTable(table)) {
+            whereClause += ` AND ${QUEUE_NOT_CLAIMED_SQL}`;
+        }
         let sql = `DELETE FROM ${quoteIdentifier(table)} ${whereClause}`;
         sql += ` RETURNING *`;
         sqlObj.string = sql;

dist/lib/mariadb/db-insert.js

@@ -2,9 +2,13 @@ import dbHandler from "../db-handler";
 import sqlInsertGenerator from "../../utils/sql-insert-generator";
 import { sanitizeHtmlFieldsBatch } from "../../utils/sanitize-html-fields";
 import grabDuplicateSafeInsertSql from "../grab-duplicate-safe-insert-sql";
+import { assertNoProtectedQueueFields, isQueueTable, } from "../queue/queue-utils";
 export default async function DbInsert({ table, data, update_on_duplicate, config, }) {
     let sqlObj = null;
     try {
+        if (isQueueTable(table)) {
+            assertNoProtectedQueueFields(table, data);
+        }
         const sanitizedData = sanitizeHtmlFieldsBatch({
             table,
             data,

dist/lib/mariadb/db-update.js

@@ -4,6 +4,7 @@ import sanitizeHtmlFields from "../../utils/sanitize-html-fields";
 import { quoteIdentifier } from "../../utils/sql-identifier";
 import sqlValuePlaceholder from "../../utils/sql-value-placeholder";
 import grabTableFields from "../../utils/grab-table-fields";
+import { assertNoProtectedQueueFields, isQueueTable, QUEUE_NOT_CLAIMED_SQL, } from "../queue/queue-utils";
 /** Thrown inside the transaction to roll back and return a response */
 class UpdateAbort extends Error {
     response;
@@ -26,13 +27,17 @@ export default async function DbUpdate({ table, data, query, targetId, config, }
             genObject: finalQuery,
             targetId,
         });
-        const whereClause = sqlQueryObj.where;
+        let whereClause = sqlQueryObj.where;
         if (!whereClause) {
             return {
                 success: false,
                 msg: `No WHERE clause`,
             };
         }
+        if (isQueueTable(table)) {
+            assertNoProtectedQueueFields(table, [data]);
+            whereClause += ` AND ${QUEUE_NOT_CLAIMED_SQL}`;
+        }
         const sanitizedData = sanitizeHtmlFields({
             table,
             data,

dist/lib/queue/queue-ack.d.ts

@@ -0,0 +1,17 @@
+import type { BunMariaDBConfig, DBResponseObject } from "../../types";
+type Params<Table extends string = string> = {
+    table: Table;
+    id: number | string;
+    /** `queue_lock_token` from the claimed row */
+    lock_token: string;
+    config?: BunMariaDBConfig;
+};
+/**
+ * Mark a claimed job as done: deletes it, or sets it to `done` when the
+ * table has `keep_completed`.
+ *
+ * Fails when the lock token no longer matches, i.e. the lease expired and
+ * another worker reclaimed the job.
+ */
+export default function QueueAck<Table extends string = string>({ table, id, lock_token, config, }: Params<Table>): Promise<DBResponseObject>;
+export {};

dist/lib/queue/queue-ack.js

@@ -0,0 +1,61 @@
+import dbHandler from "../db-handler";
+import { quoteIdentifier } from "../../utils/sql-identifier";
+import { QUEUE_NOW_SQL, requireQueueTable } from "./queue-utils";
+/**
+ * Mark a claimed job as done: deletes it, or sets it to `done` when the
+ * table has `keep_completed`.
+ *
+ * Fails when the lock token no longer matches, i.e. the lease expired and
+ * another worker reclaimed the job.
+ */
+export default async function QueueAck({ table, id, lock_token, config, }) {
+    try {
+        const options = requireQueueTable(table);
+        const tableSql = quoteIdentifier(table);
+        const claimedWhere = `WHERE id = ? AND queue_status = 'processing' AND queue_lock_token = ?`;
+        if (!options.keep_completed) {
+            const res = await dbHandler({
+                query: `DELETE FROM ${tableSql} ${claimedWhere} RETURNING *`,
+                values: [id, lock_token],
+                config,
+            });
+            if (!res.success) {
+                return { ...res, success: false };
+            }
+            if (!res.payload?.length) {
+                return {
+                    ...res,
+                    success: false,
+                    msg: "Job is not claimed with this lock token",
+                };
+            }
+            return res;
+        }
+        const res = await dbHandler({
+            query: `UPDATE ${tableSql} SET queue_status = 'done', queue_lease_expires_at = NULL, queue_lock_token = NULL, updated_at = ${QUEUE_NOW_SQL} ${claimedWhere}`,
+            values: [id, lock_token],
+            config,
+        });
+        if (!res.success) {
+            return { ...res, success: false };
+        }
+        if (!res.db_res?.affectedRows) {
+            return {
+                ...res,
+                success: false,
+                msg: "Job is not claimed with this lock token",
+            };
+        }
+        return await dbHandler({
+            query: `SELECT * FROM ${tableSql} WHERE id = ?`,
+            values: [id],
+            config,
+        });
+    }
+    catch (error) {
+        return {
+            success: false,
+            error: error.message,
+        };
+    }
+}

dist/lib/queue/queue-cancel.d.ts

@@ -0,0 +1,12 @@
+import type { BunMariaDBConfig, DBResponseObject } from "../../types";
+type Params<Table extends string = string> = {
+    table: Table;
+    id: number | string;
+    config?: BunMariaDBConfig;
+};
+/**
+ * Take a `pending` job out of the queue without deleting it. Jobs a worker
+ * has already claimed can't be cancelled.
+ */
+export default function QueueCancel<Table extends string = string>({ table, id, config, }: Params<Table>): Promise<DBResponseObject>;
+export {};

dist/lib/queue/queue-cancel.js

@@ -0,0 +1,39 @@
+import dbHandler from "../db-handler";
+import { quoteIdentifier } from "../../utils/sql-identifier";
+import { QUEUE_NOW_SQL, requireQueueTable } from "./queue-utils";
+/**
+ * Take a `pending` job out of the queue without deleting it. Jobs a worker
+ * has already claimed can't be cancelled.
+ */
+export default async function QueueCancel({ table, id, config, }) {
+    try {
+        requireQueueTable(table);
+        const tableSql = quoteIdentifier(table);
+        const res = await dbHandler({
+            query: `UPDATE ${tableSql} SET queue_status = 'cancelled', updated_at = ${QUEUE_NOW_SQL} WHERE id = ? AND queue_status = 'pending'`,
+            values: [id],
+            config,
+        });
+        if (!res.success) {
+            return { ...res, success: false };
+        }
+        if (!res.db_res?.affectedRows) {
+            return {
+                ...res,
+                success: false,
+                msg: "Job is not pending",
+            };
+        }
+        return await dbHandler({
+            query: `SELECT * FROM ${tableSql} WHERE id = ?`,
+            values: [id],
+            config,
+        });
+    }
+    catch (error) {
+        return {
+            success: false,
+            error: error.message,
+        };
+    }
+}

dist/lib/queue/queue-claim.d.ts

@@ -0,0 +1,25 @@
+import type { BunMariaDBConfig, DBResponseObject } from "../../types";
+type Params<Table extends string = string> = {
+    table: Table;
+    /** Max jobs to claim. Defaults to 1 */
+    limit?: number;
+    /** How long the claim lasts before another worker may take the job. Defaults to the table's `lease_ms` */
+    lease_ms?: number;
+    /** Jobs whose lease expired after this many attempts are marked `failed`. Defaults to the table's `max_attempts` */
+    max_attempts?: number;
+    config?: BunMariaDBConfig;
+};
+/**
+ * Claim the next available jobs, oldest `queue_available_at` first. Each
+ * returned row carries a `queue_lock_token` that must be passed to `ack`,
+ * `fail` or `extend`.
+ *
+ * `FOR UPDATE SKIP LOCKED` lets concurrent workers claim different jobs
+ * without blocking on each other or claiming the same job twice.
+ */
+export default function QueueClaim<Schema extends {
+    [k: string]: any;
+} = {
+    [k: string]: any;
+}, Table extends string = string>({ table, limit, lease_ms, max_attempts, config, }: Params<Table>): Promise<DBResponseObject<Schema>>;
+export {};

dist/lib/queue/queue-claim.js

@@ -0,0 +1,79 @@
+import dbHandler, { holdEventLoop, resolveClient } from "../db-handler";
+import { quoteIdentifier } from "../../utils/sql-identifier";
+import { QUEUE_NOW_SQL, requireQueueTable } from "./queue-utils";
+/**
+ * Claim the next available jobs, oldest `queue_available_at` first. Each
+ * returned row carries a `queue_lock_token` that must be passed to `ack`,
+ * `fail` or `extend`.
+ *
+ * `FOR UPDATE SKIP LOCKED` lets concurrent workers claim different jobs
+ * without blocking on each other or claiming the same job twice.
+ */
+export default async function QueueClaim({ table, limit = 1, lease_ms, max_attempts, config, }) {
+    try {
+        const options = requireQueueTable(table);
+        const tableSql = quoteIdentifier(table);
+        const finalLimit = Math.max(1, Math.floor(Number(limit) || 1));
+        const leaseMs = Math.max(0, Math.floor(Number(lease_ms ?? options.lease_ms) || 0));
+        const maxAttempts = Math.max(1, Math.floor(Number(max_attempts ?? options.max_attempts) || 1));
+        /**
+         * Release jobs whose worker died or stalled past its lease: back to
+         * `pending`, or `failed` if that was the last attempt.
+         */
+        const expired_res = await dbHandler({
+            query: `UPDATE ${tableSql} SET queue_status = IF(queue_attempts >= ?, 'failed', 'pending'), queue_lease_expires_at = NULL, queue_lock_token = NULL, queue_last_error = 'Lease expired', updated_at = ${QUEUE_NOW_SQL} WHERE queue_status = 'processing' AND queue_lease_expires_at <= ${QUEUE_NOW_SQL}`,
+            values: [maxAttempts],
+            config,
+        });
+        if (!expired_res.success) {
+            return { ...expired_res, success: false };
+        }
+        const CLIENT = resolveClient(config);
+        if (!CLIENT) {
+            throw new Error(`Couldn't grab MariaDB Client.`);
+        }
+        const lock_token = crypto.randomUUID();
+        return await holdEventLoop(() => CLIENT.begin(async (tx) => {
+            /**
+             * The ORDER BY must match `idx_queue_claim`. A filesort would
+             * lock every pending row before LIMIT applies, and SKIP LOCKED
+             * would then hide the whole queue from other workers.
+             */
+            const matched_res = await dbHandler({
+                query: `SELECT id FROM ${tableSql} FORCE INDEX (idx_queue_claim) WHERE queue_status = 'pending' AND queue_available_at <= ${QUEUE_NOW_SQL} ORDER BY queue_status, queue_available_at, id LIMIT ? FOR UPDATE SKIP LOCKED`,
+                values: [finalLimit],
+                client: tx,
+            });
+            if (!matched_res.success) {
+                return {
+                    ...matched_res,
+                    success: false,
+                };
+            }
+            const ids = (matched_res.payload || []).map((row) => row.id);
+            if (ids.length === 0) {
+                return { success: true, payload: [] };
+            }
+            const idPlaceholders = ids.map(() => "?").join(",");
+            const update_res = await dbHandler({
+                query: `UPDATE ${tableSql} SET queue_status = 'processing', queue_attempts = queue_attempts + 1, queue_lease_expires_at = ${QUEUE_NOW_SQL} + ?, queue_lock_token = ?, updated_at = ${QUEUE_NOW_SQL} WHERE id IN (${idPlaceholders})`,
+                values: [leaseMs, lock_token, ...ids],
+                client: tx,
+            });
+            if (!update_res.success) {
+                throw new Error(update_res.error || "Queue claim failed");
+            }
+            return await dbHandler({
+                query: `SELECT * FROM ${tableSql} WHERE id IN (${idPlaceholders}) ORDER BY queue_available_at, id`,
+                values: ids,
+                client: tx,
+            });
+        }));
+    }
+    catch (error) {
+        return {
+            success: false,
+            error: error.message,
+        };
+    }
+}

dist/lib/queue/queue-extend.d.ts

@@ -0,0 +1,16 @@
+import type { BunMariaDBConfig, DBResponseObject } from "../../types";
+type Params<Table extends string = string> = {
+    table: Table;
+    id: number | string;
+    /** `queue_lock_token` from the claimed row */
+    lock_token: string;
+    /** New lease length, counted from now. Defaults to the table's `lease_ms` */
+    lease_ms?: number;
+    config?: BunMariaDBConfig;
+};
+/**
+ * Extend the lease on a claimed job, for jobs that run longer than the
+ * lease given to `claim`.
+ */
+export default function QueueExtend<Table extends string = string>({ table, id, lock_token, lease_ms, config, }: Params<Table>): Promise<DBResponseObject>;
+export {};

dist/lib/queue/queue-extend.js

@@ -0,0 +1,39 @@
+import dbHandler from "../db-handler";
+import { quoteIdentifier } from "../../utils/sql-identifier";
+import { QUEUE_NOW_SQL, requireQueueTable } from "./queue-utils";
+/**
+ * Extend the lease on a claimed job, for jobs that run longer than the
+ * lease given to `claim`.
+ */
+export default async function QueueExtend({ table, id, lock_token, lease_ms, config, }) {
+    try {
+        const options = requireQueueTable(table);
+        const leaseMs = Math.max(0, Math.floor(Number(lease_ms ?? options.lease_ms) || 0));
+        const res = await dbHandler({
+            query: `UPDATE ${quoteIdentifier(table)} SET queue_lease_expires_at = ${QUEUE_NOW_SQL} + ?, updated_at = ${QUEUE_NOW_SQL} WHERE id = ? AND queue_status = 'processing' AND queue_lock_token = ?`,
+            values: [leaseMs, id, lock_token],
+            config,
+        });
+        if (!res.success) {
+            return { ...res, success: false };
+        }
+        if (!res.db_res?.affectedRows) {
+            return {
+                ...res,
+                success: false,
+                msg: "Job is not claimed with this lock token",
+            };
+        }
+        return await dbHandler({
+            query: `SELECT * FROM ${quoteIdentifier(table)} WHERE id = ?`,
+            values: [id],
+            config,
+        });
+    }
+    catch (error) {
+        return {
+            success: false,
+            error: error.message,
+        };
+    }
+}

dist/lib/queue/queue-fail.d.ts

@@ -0,0 +1,19 @@
+import type { BunMariaDBConfig, DBResponseObject } from "../../types";
+type Params<Table extends string = string> = {
+    table: Table;
+    id: number | string;
+    /** `queue_lock_token` from the claimed row */
+    lock_token: string;
+    error?: string;
+    /** Wait this long before the job can be retried. Defaults to 0 */
+    retry_delay_ms?: number;
+    /** Mark the job `failed` instead of retrying once it reaches this many attempts. Defaults to the table's `max_attempts` */
+    max_attempts?: number;
+    config?: BunMariaDBConfig;
+};
+/**
+ * Release a claimed job after a failed attempt. It goes back to `pending`
+ * (after `retry_delay_ms`) or to `failed` once `max_attempts` is reached.
+ */
+export default function QueueFail<Table extends string = string>({ table, id, lock_token, error, retry_delay_ms, max_attempts, config, }: Params<Table>): Promise<DBResponseObject>;
+export {};

dist/lib/queue/queue-fail.js

@@ -0,0 +1,41 @@
+import dbHandler from "../db-handler";
+import { quoteIdentifier } from "../../utils/sql-identifier";
+import { QUEUE_NOW_SQL, requireQueueTable } from "./queue-utils";
+/**
+ * Release a claimed job after a failed attempt. It goes back to `pending`
+ * (after `retry_delay_ms`) or to `failed` once `max_attempts` is reached.
+ */
+export default async function QueueFail({ table, id, lock_token, error, retry_delay_ms = 0, max_attempts, config, }) {
+    try {
+        const options = requireQueueTable(table);
+        const tableSql = quoteIdentifier(table);
+        const retryDelayMs = Math.max(0, Math.floor(Number(retry_delay_ms) || 0));
+        const maxAttempts = Math.max(1, Math.floor(Number(max_attempts ?? options.max_attempts) || 1));
+        const res = await dbHandler({
+            query: `UPDATE ${tableSql} SET queue_status = IF(queue_attempts >= ?, 'failed', 'pending'), queue_available_at = ${QUEUE_NOW_SQL} + ?, queue_lease_expires_at = NULL, queue_lock_token = NULL, queue_last_error = ?, updated_at = ${QUEUE_NOW_SQL} WHERE id = ? AND queue_status = 'processing' AND queue_lock_token = ?`,
+            values: [maxAttempts, retryDelayMs, error ?? null, id, lock_token],
+            config,
+        });
+        if (!res.success) {
+            return { ...res, success: false };
+        }
+        if (!res.db_res?.affectedRows) {
+            return {
+                ...res,
+                success: false,
+                msg: "Job is not claimed with this lock token",
+            };
+        }
+        return await dbHandler({
+            query: `SELECT * FROM ${quoteIdentifier(table)} WHERE id = ?`,
+            values: [id],
+            config,
+        });
+    }
+    catch (error) {
+        return {
+            success: false,
+            error: error.message,
+        };
+    }
+}

dist/lib/queue/queue-push.d.ts

@@ -0,0 +1,21 @@
+import type { BunMariaDBConfig, DBResponseObject } from "../../types";
+type Params<Schema extends {
+    [k: string]: any;
+} = {
+    [k: string]: any;
+}, Table extends string = string> = {
+    table: Table;
+    data: Schema[];
+    /** Wait this long before the jobs can be claimed */
+    delay_ms?: number;
+    config?: BunMariaDBConfig;
+};
+/**
+ * Add jobs to a queue table.
+ */
+export default function QueuePush<Schema extends {
+    [k: string]: any;
+} = {
+    [k: string]: any;
+}, Table extends string = string>({ table, data, delay_ms, config, }: Params<Schema, Table>): Promise<DBResponseObject>;
+export {};

dist/lib/queue/queue-push.js

@@ -0,0 +1,11 @@
+import DbInsert from "../mariadb/db-insert";
+/**
+ * Add jobs to a queue table.
+ */
+export default async function QueuePush({ table, data, delay_ms, config, }) {
+    const jobs = data.map((d) => ({
+        ...(delay_ms ? { queue_available_at: Date.now() + delay_ms } : {}),
+        ...d,
+    }));
+    return DbInsert({ table, data: jobs, config });
+}

dist/lib/queue/queue-utils.d.ts

@@ -0,0 +1,34 @@
+import { type BUN_MARIADB_QueueTableOptions } from "../../types";
+/**
+ * Current time in ms from the database clock. Leases are set and checked
+ * with this so workers on hosts with drifting clocks agree on expiry.
+ */
+export declare const QUEUE_NOW_SQL = "CAST(UNIX_TIMESTAMP(NOW(3)) * 1000 AS SIGNED)";
+/**
+ * Extra WHERE condition for generic update/delete on queue tables: rows a
+ * worker has claimed are only changed through the queue API.
+ */
+export declare const QUEUE_NOT_CLAIMED_SQL = "`queue_status` <> 'processing'";
+export type ResolvedQueueTableOptions = Required<BUN_MARIADB_QueueTableOptions>;
+/**
+ * A table's `queue_table` options with defaults filled in (looked up
+ * directly or through its parent table), or `undefined` if it is not a
+ * queue table.
+ */
+export declare function grabQueueTableOptions(tableName: string): ResolvedQueueTableOptions | undefined;
+/**
+ * Whether a table is declared with `queue_table` (directly or through its
+ * parent table).
+ */
+export declare function isQueueTable(tableName: string): boolean;
+/**
+ * Queue options for a table the queue API was called on. Throws if the table
+ * is not a queue table.
+ */
+export declare function requireQueueTable(tableName: string): ResolvedQueueTableOptions;
+/**
+ * Throw if `data` sets queue state the queue API owns.
+ */
+export declare function assertNoProtectedQueueFields(table: string, data: {
+    [k: string]: any;
+}[]): void;

dist/lib/queue/queue-utils.js

@@ -0,0 +1,69 @@
+import _ from "lodash";
+import { readLiveSchema } from "../../functions/live-schema";
+import { QueueProtectedFields, } from "../../types";
+/**
+ * Current time in ms from the database clock. Leases are set and checked
+ * with this so workers on hosts with drifting clocks agree on expiry.
+ */
+export const QUEUE_NOW_SQL = "CAST(UNIX_TIMESTAMP(NOW(3)) * 1000 AS SIGNED)";
+/**
+ * Extra WHERE condition for generic update/delete on queue tables: rows a
+ * worker has claimed are only changed through the queue API.
+ */
+export const QUEUE_NOT_CLAIMED_SQL = "`queue_status` <> 'processing'";
+const QUEUE_TABLE_DEFAULTS = {
+    max_attempts: 5,
+    lease_ms: 30_000,
+    keep_completed: false,
+};
+/**
+ * A table's `queue_table` options with defaults filled in (looked up
+ * directly or through its parent table), or `undefined` if it is not a
+ * queue table.
+ */
+export function grabQueueTableOptions(tableName) {
+    const dbSchema = global.DB_SCHEMA || readLiveSchema();
+    const table = dbSchema?.tables?.find((t) => t.tableName === tableName);
+    if (!table)
+        return undefined;
+    if (table.queue_table === undefined) {
+        return table.parentTableName
+            ? grabQueueTableOptions(table.parentTableName)
+            : undefined;
+    }
+    if (!table.queue_table)
+        return undefined;
+    return {
+        ...QUEUE_TABLE_DEFAULTS,
+        ...(typeof table.queue_table === "object"
+            ? _.omitBy(table.queue_table, _.isUndefined)
+            : {}),
+    };
+}
+/**
+ * Whether a table is declared with `queue_table` (directly or through its
+ * parent table).
+ */
+export function isQueueTable(tableName) {
+    return Boolean(grabQueueTableOptions(tableName));
+}
+/**
+ * Queue options for a table the queue API was called on. Throws if the table
+ * is not a queue table.
+ */
+export function requireQueueTable(tableName) {
+    const options = grabQueueTableOptions(tableName);
+    if (!options) {
+        throw new Error(`\`${tableName}\` is not a queue table`);
+    }
+    return options;
+}
+/**
+ * Throw if `data` sets queue state the queue API owns.
+ */
+export function assertNoProtectedQueueFields(table, data) {
+    const protectedFields = QueueProtectedFields.filter((field) => data.some((d) => d && d[field] !== undefined));
+    if (protectedFields.length > 0) {
+        throw new Error(`\`${table}\` is a queue table: ${protectedFields.join(", ")} can only be changed through BunMariaDB.queue`);
+    }
+}

dist/lib/schema/build-column-definition.js

@@ -1,6 +1,7 @@
 import isVectorField from "./is-vector-field";
 import mapDataType from "./map-data-types";
 import MariaDBQuoteGen from "./mariadb-quote-gen";
+import { escapeStringLiteral } from "../../utils/sql-identifier";
 export default function buildColumnDefinition(field, options = {}) {
     if (!field.fieldName) {
         throw new Error("Field name is required");
@@ -27,7 +28,7 @@ export default function buildColumnDefinition(field, options = {}) {
     }
     if (field.defaultValue !== undefined) {
         if (typeof field.defaultValue === "string") {
-            parts.push(`DEFAULT '${field.defaultValue.replace(/'/g, "''")}'`);
+            parts.push(`DEFAULT '${escapeStringLiteral(field.defaultValue)}'`);
         }
         else {
             parts.push(`DEFAULT ${field.defaultValue}`);

dist/lib/schema/map-data-types.js

@@ -1,3 +1,4 @@
+import { escapeStringLiteral } from "../../utils/sql-identifier";
 export default function mapDataType(field) {
     const dataType = field.dataType?.toUpperCase() || "TEXT";
     const vectorSize = field.vectorSize || 1536;
@@ -76,13 +77,13 @@ export default function mapDataType(field) {
             return "TINYINT(1)";
         case "ENUM": {
             const enumVals = (field.options || [])
-                .map((v) => `'${String(v).replace(/'/g, "''")}'`)
+                .map((v) => `'${escapeStringLiteral(String(v))}'`)
                 .join(", ");
             return `ENUM(${enumVals || "''"})`;
         }
         case "SET": {
             const setVals = (field.options || [])
-                .map((v) => `'${String(v).replace(/'/g, "''")}'`)
+                .map((v) => `'${escapeStringLiteral(String(v))}'`)
                 .join(", ");
             return `SET(${setVals || "''"})`;
         }

dist/lib/schema/update-table.js

@@ -12,8 +12,8 @@ import { dropForeignKeysOnColumns } from "./sync-foreign-keys";
  * Live types often include display widths (e.g. bigint(20) vs BIGINT).
  */
 function columnTypesMatch(liveType, expectedType) {
-    const live = liveType.toLowerCase().replace(/\s+/g, "");
-    const expected = expectedType.toLowerCase().replace(/\s+/g, "");
+    const live = normalizeSqlOutsideQuotes(liveType, "");
+    const expected = normalizeSqlOutsideQuotes(expectedType, "");
     if (live === expected)
         return true;
     // live may include display width: bigint(20) vs bigint
@@ -41,25 +41,71 @@ function vectorTypeDiverged(liveType, liveComment, field) {
     }
     return true;
 }
-function normalizeDefault(value) {
+/**
+ * Lowercase SQL and collapse whitespace to `space`, leaving the contents of
+ * single-quoted literals untouched (ENUM options, string defaults).
+ */
+function normalizeSqlOutsideQuotes(sql, space) {
+    return sql
+        .trim()
+        .split(/('(?:[^'\\]|''|\\.)*')/)
+        .map((part, i) => i % 2 === 1 ? part : part.toLowerCase().replace(/\s+/g, space))
+        .join("");
+}
+/**
+ * Parse a default as MariaDB reports it in COLUMN_DEFAULT (or as written in
+ * `defaultValueLiteral`): unquoted NULL, an escaped quoted string literal,
+ * or an expression / number.
+ */
+function parseDefault(value) {
     if (value == null)
-        return "";
-    let v = String(value).trim();
-    // Strip surrounding quotes MariaDB may include
-    if ((v.startsWith("'") && v.endsWith("'")) ||
-        (v.startsWith('"') && v.endsWith('"'))) {
-        v = v.slice(1, -1);
+        return { kind: "none" };
+    const v = String(value).trim();
+    if (/^null$/i.test(v))
+        return { kind: "none" };
+    if (/^'(?:[^'\\]|''|\\.)*'$/s.test(v)) {
+        const escapes = {
+            n: "\n",
+            t: "\t",
+            r: "\r",
+            "0": "\0",
+        };
+        return {
+            kind: "string",
+            value: v
+                .slice(1, -1)
+                .replace(/''|\\(.)/gs, (m, ch) => m === "''" ? "'" : (escapes[ch] ?? ch)),
+        };
     }
-    return v.toLowerCase().replace(/\s+/g, " ");
+    let expr = normalizeSqlOutsideQuotes(v, "");
+    // MariaDB may wrap expressions in parentheses
+    while (/^\(.*\)$/.test(expr) && balancedParens(expr.slice(1, -1))) {
+        expr = expr.slice(1, -1);
+    }
+    return { kind: "expr", value: expr };
+}
+function balancedParens(s) {
+    let depth = 0;
+    for (const ch of s) {
+        if (ch === "(")
+            depth++;
+        if (ch === ")" && --depth < 0)
+            return false;
+    }
+    return depth === 0;
 }
 function expectedDefault(field) {
     if (field.defaultValue !== undefined) {
-        return String(field.defaultValue);
+        // Strings are emitted as quoted literals; numbers verbatim
+        if (typeof field.defaultValue === "string") {
+            return { kind: "string", value: field.defaultValue };
+        }
+        return parseDefault(String(field.defaultValue));
     }
     if (field.defaultValueLiteral) {
-        return field.defaultValueLiteral;
+        return parseDefault(field.defaultValueLiteral);
     }
-    return null;
+    return { kind: "none" };
 }
 function expectedOnUpdate(field) {
     if (field.onUpdate)
@@ -68,15 +114,29 @@ function expectedOnUpdate(field) {
         return field.onUpdateLiteral;
     return null;
 }
-function defaultsMatch(liveDefault, expected) {
-    if (liveDefault === expected)
-        return true;
-    if (expected.includes("current_timestamp") &&
-        liveDefault.includes("current_timestamp")) {
-        return true;
+function defaultsMatch(live, expected) {
+    if (live.kind === "none" || expected.kind === "none") {
+        return live.kind === expected.kind;
+    }
+    if (live.value === expected.value) {
+        // A string never equals an expression of the same text, except for
+        // numbers, which MariaDB reports unquoted on numeric columns
+        return live.kind === expected.kind || isNumeric(live.value);
+    }
+    // DECIMAL defaults are reported padded: 1.5 → 1.50
+    if (isNumeric(live.value) && isNumeric(expected.value)) {
+        return Number(live.value) === Number(expected.value);
+    }
+    if (live.kind === "expr" && expected.kind === "expr") {
+        // now() / current_timestamp / current_timestamp(N) are aliases
+        const ts = /^(current_timestamp|now|localtimestamp|localtime)(\(\d*\))?$/;
+        return ts.test(live.value) && ts.test(expected.value);
     }
     return false;
 }
+function isNumeric(value) {
+    return value.trim() !== "" && Number.isFinite(Number(value));
+}
 function columnAttributesDiverged(live, field) {
     const wantsNotNull = fieldRequiresNotNull(field);
     if (wantsNotNull && live.isNullable) {
@@ -92,12 +152,12 @@ function columnAttributesDiverged(live, field) {
         return true;
     }
     const wantsDefault = expectedDefault(field);
-    if (wantsDefault != null) {
-        const liveDefault = normalizeDefault(live.columnDefault);
-        const expected = normalizeDefault(wantsDefault);
-        if (!defaultsMatch(liveDefault, expected)) {
-            return true;
-        }
+    const liveDefault = parseDefault(live.columnDefault);
+    // Older servers give TIMESTAMP columns an implicit default
+    const implicitDefault = wantsDefault.kind === "none" &&
+        field.dataType?.toUpperCase() === "TIMESTAMP";
+    if (!implicitDefault && !defaultsMatch(liveDefault, wantsDefault)) {
+        return true;
     }
     const wantsOnUpdate = expectedOnUpdate(field);
     const hasOnUpdate = /on update/i.test(live.extra || "");
@@ -108,11 +168,9 @@ function columnAttributesDiverged(live, field) {
         return true;
     }
     if (wantsOnUpdate && hasOnUpdate) {
-        const liveOnUpdate = normalizeDefault((live.extra.match(/on update\s+(.+)/i) || [])[1] || "");
-        const expectedOu = normalizeDefault(wantsOnUpdate);
-        if (liveOnUpdate &&
-            expectedOu &&
-            !defaultsMatch(liveOnUpdate, expectedOu)) {
+        const liveOnUpdate = parseDefault((live.extra.match(/on update\s+(.+)/i) || [])[1] || "");
+        const expectedOu = parseDefault(wantsOnUpdate);
+        if (!defaultsMatch(liveOnUpdate, expectedOu)) {
             return true;
         }
     }

dist/types/index.d.ts

@@ -74,6 +74,24 @@ export interface BUN_MARIADB_TableSchemaType {
      */
     childTableDbId?: string | number;
     collation?: (typeof MariaDBCollations)[number];
+    /**
+     * Make this table a job queue. Adds the `QueueFields` columns and
+     * `QueueIndexes`, and routes state changes through `BunMariaDB.queue`.
+     * Pass an options object to set the queue's defaults.
+     */
+    queue_table?: boolean | BUN_MARIADB_QueueTableOptions;
+}
+/**
+ * Defaults for a queue table. Per-call arguments to `BunMariaDB.queue`
+ * override them.
+ */
+export interface BUN_MARIADB_QueueTableOptions {
+    /** Attempts before a job is marked `failed`. Defaults to 5 */
+    max_attempts?: number;
+    /** How long a claim lasts before another worker may take the job. Defaults to 30s */
+    lease_ms?: number;
+    /** `ack` marks jobs `done` and keeps them instead of deleting them */
+    keep_completed?: boolean;
 }
 /**
  * Reference object used to link a table to one of its child tables.
@@ -1425,6 +1443,28 @@ export type BunMariaDBConfigReturn = {
  * Default fields automatically suggested for new tables.
  */
 export declare const DefaultFields: BUN_MARIADB_FieldSchemaType[];
+/**
+ * Lifecycle of a queue row. Only `pending` jobs are claimed.
+ * - `done`: acknowledged, kept because of `keep_completed` (otherwise deleted)
+ * - `failed`: used up its attempts (dead letter)
+ * - `cancelled`: removed from the queue with `queue.cancel`
+ */
+export declare const QueueStatuses: readonly ["pending", "processing", "done", "failed", "cancelled"];
+export type QueueStatus = (typeof QueueStatuses)[number];
+/**
+ * Fields added to every table with `queue_table: true`.
+ */
+export declare const QueueFields: BUN_MARIADB_FieldSchemaType[];
+/**
+ * Queue fields only the queue API may write. `queue_available_at` can be set
+ * on insert and update.
+ */
+export declare const QueueProtectedFields: readonly ["queue_status", "queue_attempts", "queue_lease_expires_at", "queue_lock_token", "queue_last_error"];
+/**
+ * Indexes added to queue tables. Claims scan `idx_queue_claim` in order, so
+ * `LIMIT` stops the scan early and only the claimed rows get locked.
+ */
+export declare const QueueIndexes: BUN_MARIADB_IndexSchemaType[];
 export type BunMariaDBQueryFieldValues<F extends string = string, T extends string = string> = {
     field: F;
     table?: T;

dist/types/index.js

@@ -235,6 +235,87 @@ export const DefaultFields = [
         fieldDescription: "The time when the record was updated. (Unix Timestamp)",
     },
 ];
+/**
+ * Lifecycle of a queue row. Only `pending` jobs are claimed.
+ * - `done`: acknowledged, kept because of `keep_completed` (otherwise deleted)
+ * - `failed`: used up its attempts (dead letter)
+ * - `cancelled`: removed from the queue with `queue.cancel`
+ */
+export const QueueStatuses = [
+    "pending",
+    "processing",
+    "done",
+    "failed",
+    "cancelled",
+];
+/**
+ * Fields added to every table with `queue_table: true`.
+ */
+export const QueueFields = [
+    {
+        fieldName: "queue_status",
+        dataType: "ENUM",
+        options: [...QueueStatuses],
+        notNullValue: true,
+        defaultValue: "pending",
+        fieldDescription: "Queue state of the job.",
+    },
+    {
+        fieldName: "queue_available_at",
+        dataType: "BIGINT",
+        notNullValue: true,
+        defaultValue: 0,
+        fieldDescription: "The job cannot be claimed before this time. (Unix Timestamp, ms)",
+    },
+    {
+        fieldName: "queue_attempts",
+        dataType: "INT",
+        notNullValue: true,
+        defaultValue: 0,
+        fieldDescription: "How many times the job has been claimed.",
+    },
+    {
+        fieldName: "queue_lease_expires_at",
+        dataType: "BIGINT",
+        fieldDescription: "When the current claim expires and the job can be reclaimed. (Unix Timestamp, ms)",
+    },
+    {
+        fieldName: "queue_lock_token",
+        dataType: "VARCHAR",
+        dataLength: 64,
+        fieldDescription: "Token of the current claim. Required to ack, fail or extend the job.",
+    },
+    {
+        fieldName: "queue_last_error",
+        dataType: "TEXT",
+        fieldDescription: "Error message from the last failed attempt.",
+    },
+];
+/**
+ * Queue fields only the queue API may write. `queue_available_at` can be set
+ * on insert and update.
+ */
+export const QueueProtectedFields = [
+    "queue_status",
+    "queue_attempts",
+    "queue_lease_expires_at",
+    "queue_lock_token",
+    "queue_last_error",
+];
+/**
+ * Indexes added to queue tables. Claims scan `idx_queue_claim` in order, so
+ * `LIMIT` stops the scan early and only the claimed rows get locked.
+ */
+export const QueueIndexes = [
+    {
+        indexName: "idx_queue_claim",
+        indexTableFields: ["queue_status", "queue_available_at"],
+    },
+    {
+        indexName: "idx_queue_lease",
+        indexTableFields: ["queue_status", "queue_lease_expires_at"],
+    },
+];
 export const RequiredENVs = [
     "BUN_MARIADB_SERVER_HOST",
     "BUN_MARIADB_SERVER_PORT",

dist/utils/append-default-fields-to-db-schema.js

@@ -1,11 +1,31 @@
 import _ from "lodash";
-import { DefaultFields } from "../types";
+import { DefaultFields, QueueFields, QueueIndexes, } from "../types";
+const queueFieldNames = new Set(QueueFields.map((f) => f.fieldName));
+const queueIndexNames = new Set(QueueIndexes.map((i) => i.indexName));
 export default function ({ dbSchema }) {
     const finaldbSchema = _.cloneDeep(dbSchema);
     finaldbSchema.tables = finaldbSchema.tables.map((t) => {
         const newTable = _.cloneDeep(t);
         newTable.fields = newTable.fields.filter((f) => !f.fieldName?.match(/^(id|created_at|updated_at)$/));
         newTable.fields.unshift(...DefaultFields);
+        if (newTable.queue_table) {
+            const reserved = [
+                ...newTable.fields
+                    .map((f) => f.fieldName)
+                    .filter((name) => queueFieldNames.has(name)),
+                ...(newTable.indexes || [])
+                    .map((i) => i.indexName)
+                    .filter((name) => queueIndexNames.has(name)),
+            ];
+            if (reserved.length > 0) {
+                throw new Error(`\`${newTable.tableName}\` is a queue table: ${reserved.join(", ")} ${reserved.length > 1 ? "are" : "is"} managed by bun-mariadb and can't be declared in the schema`);
+            }
+            newTable.fields.push(..._.cloneDeep(QueueFields));
+            newTable.indexes = [
+                ...(newTable.indexes || []),
+                ..._.cloneDeep(QueueIndexes),
+            ];
+        }
         return newTable;
     });
     return finaldbSchema;