初次提交

2024-10-30 14:31:08 +08:00
commit ebfefc2295
13 changed files with 1902 additions and 0 deletions
--- a/src/database.ts
+++ b/src/database.ts
@ -0,0 +1,182 @@
+import { Pool, PoolClient, QueryResult, QueryResultRow } from "pg";
+import { BasicEntity } from "./entity";
+import { DeleteBuilder, IDeleteBuilder, IInsertBuilder, InsertBuilder, ISelectBuilder, IUpdateBuilder, SelectBuilder, UpdateBuilder } from "./query";
+import { Class } from "./types";
+import { formatSQL } from "./util";
+
+interface IPostgresClient {
+	/**
+	 * 执行sql语句
+	 * @param sql sql语句
+	 * @param args sql参数
+	 */
+	query<R>(sql: string, args?: any[]): Promise<QueryResult<R[]>>;
+
+	/** 开启事务 */
+	trans(): Promise<void>;
+
+	/**
+	 * 查询实体
+	 * @param Entity 实体
+	 * @param alias 别名 
+	 */
+	select<E extends BasicEntity>(Entity: Class<E>, alias?: string): ISelectBuilder<E>;
+
+	/**
+	 * 进行数据库插入
+	 * @param Entity 实体
+	 */
+	insert<E extends BasicEntity>(Entity: Class<E>): IInsertBuilder<E>;
+
+	/**
+	 * 进行实体更新
+	 * @param Entity 实体
+	 */
+	update<E extends BasicEntity>(Entity: Class<E>): IUpdateBuilder<E>;
+
+	/**
+	 * 进行实体删除
+	 * @param Entity 实体
+	 */
+	del<E extends BasicEntity>(Entity: Class<E>): IDeleteBuilder<E>;
+}
+
+interface IPostgresConfig {
+	host?: string
+	port?: number
+	user?: string
+	password?: string
+	database?: string
+	max?: number
+}
+
+class PostgresClient implements IPostgresClient {
+	#client: PoolClient
+	#transOn = false;
+
+	constructor(client: PoolClient) {
+		this.#client = client;
+	}
+
+	public query<R>(sql: string, args?: any[] | Record<string, any>): Promise<QueryResult<R[]>> { return this.#client.query(args ? formatSQL(sql, args) : sql); }
+
+
+	public async trans() {
+		await this.query("begin")
+		this.#transOn = true;
+	}
+
+	public get transOn() { return this.#transOn; }
+
+	public release() { this.#client.release(); }
+
+	public select<E extends BasicEntity>(Entity: Class<E>, alias?: string): ISelectBuilder<E> { return new SelectBuilder(this.query.bind(this), Entity, alias); }
+
+	public insert<E extends BasicEntity>(Entity: Class<E>): IInsertBuilder<E> { return new InsertBuilder(this.query.bind(this), Entity); }
+
+	public update<E extends BasicEntity>(Entity: Class<E>): IUpdateBuilder<E> { return new UpdateBuilder(this.query.bind(this), Entity); }
+
+	public del<E extends BasicEntity>(Entity: Class<E>): IDeleteBuilder<E> { return new DeleteBuilder(this.query.bind(this), Entity); }
+};
+
+/** 数据库操作相关 */
+export namespace database {
+
+	let pool: Pool | null = null;
+	let confLoader!: () => IPostgresConfig
+
+	function getPool() {
+		if (!pool) {
+			const conf = confLoader();
+			pool = new Pool({
+				host: conf.host,
+				port: conf.port,
+				user: conf.user,
+				password: conf.password,
+				database: conf.database,
+				max: conf.max,
+				ssl: false,
+			});
+		}
+		return pool;
+	}
+
+	/**
+	 * 配置数据库
+	 * @param loader 配置加载器
+	 */
+	export function config(loader: () => IPostgresConfig) {
+		confLoader = loader;
+	}
+
+	/**
+	 * 直接执行sql语句
+	 * @param sql sql语句
+	 * @param args sql参数
+	 */
+	export function query<R extends QueryResultRow>(sql: string, args?: any[] | Record<string, any>) { return getPool().query<R>(args ? formatSQL(sql, args) : sql); }
+
+	/**
+	 * 查询实体
+	 * @param Entity 实体
+	 * @param alias 别名 
+	 */
+	export function select<E extends BasicEntity>(Entity: Class<E>, alias?: string): ISelectBuilder<E> { return new SelectBuilder(database.query, Entity, alias); }
+
+	/**
+	 * 进行数据库插入
+	 * @param Entity 实体
+	 */
+	export function insert<E extends BasicEntity>(Entity: Class<E>): IInsertBuilder<E> { return new InsertBuilder(database.query, Entity); }
+
+	/**
+	 * 进行实体更新
+	 * @param Entity 实体
+	 */
+	export function update<E extends BasicEntity>(Entity: Class<E>): IUpdateBuilder<E> { return new UpdateBuilder(database.query, Entity); }
+
+	/**
+	 * 进行实体删除
+	 * @param Entity 实体
+	 */
+	export function del<E extends BasicEntity>(Entity: Class<E>): IDeleteBuilder<E> { return new DeleteBuilder(database.query, Entity); }
+
+	/**
+	 * 连接数据库
+	 * @param callback 回调
+	 */
+	export async function connect<R>(callback: (client: PostgresClient) => R | Promise<R>): Promise<R> {
+		const conn = await getPool().connect();
+		const client = new PostgresClient(conn);
+		let ret: R;
+		try {
+			ret = await callback(client);
+			if (client.transOn) await client.query("commit");
+		}
+		catch (err) {
+			if (client.transOn) await client.query("rollback");
+			throw err;
+		}
+		finally {
+			client.release();
+		}
+
+		return ret;
+	}
+
+	/**
+	 * 执行事务操作
+	 * @param callback 回调
+	 */
+	export function transaction<R>(callback: (client: PostgresClient) => R | Promise<R>): Promise<R> {
+		return connect(async (client) => {
+			await client.trans();
+			return callback(client);
+		});
+	};
+
+	/** 关闭数据库 */
+	export function close() {
+		if (pool) pool.end().catch((err) => console.error(err));
+	}
+}
--- a/src/entity.ts
+++ b/src/entity.ts
@ -0,0 +1,389 @@
+import moment from "moment";
+import { DatabaseError } from "./error";
+import { TSVector } from "./type";
+import { escapeID, escapeValue } from "./util";
+import type { ArrayType, ArrayTypeSelf, BasicFieldName, Class, Decorators, IDLikeFieldName, Values } from "./types";
+
+export interface IEntityFieldConfig {
+	/** 字段名 */
+	name: string
+	/** 解析后的属性名 */
+	prop: string
+	/** 是否是主键 */
+	primary: boolean
+	/** 编码方式(存入数据库时) */
+	encode: (data: any) => string
+	/** 解码方式(查询数据库时) */
+	decode: (data: any) => any
+}
+
+
+export interface IEntityJoinConfig {
+	/** 属性名称 */
+	prop: string
+	/** 是否是many */
+	many: boolean
+	/** 目标表 */
+	entity: () => any
+	/**
+	 * join条件生成方法
+	 * @param cur 当前表名
+	 * @param dst 目标表名
+	 */
+	builder(cur: string, dst: string): string
+}
+
+export interface IEntityConfig {
+	/** 类信息 */
+	clazz: any
+	/** 模式名 */
+	schema?: string
+	/** 表名 */
+	table: string
+	/** 字段配置 */
+	fields: IEntityFieldConfig[]
+	/** join信息 */
+	joins: IEntityJoinConfig[]
+}
+
+export class BasicEntity {
+	private ___is_db_entity___ = true
+
+	public static make<T extends BasicEntity>(this: Class<T>, data: Partial<Pick<T, BasicFieldName<T>>>, prefix?: string) {
+		const obj = new this();
+		const config = getEntityConfig(this);
+		for (const col of config.fields) {
+			const pname = prefix ? `${prefix}${col.prop}` : col.prop;
+			if (pname in data) (obj as any)[col.prop] = (data as any)[pname];
+		}
+		return obj;
+	}
+
+	/**
+	 * 提取指定属性
+	 * @param keys 要提取的属性
+	 */
+	public pick<K extends BasicFieldName<this>>(...keys: K[]): Pick<this, K> {
+		const result: any = {};
+		for (const k of keys) {
+			result[k] = this[k];
+		}
+		return result;
+	}
+
+	/**
+	 * 排除指定的属性，提取剩余属性
+	 * @param keys 要排除的键
+	 */
+	public omit<K extends BasicFieldName<this>>(...keys: K[]): Omit<Pick<this, BasicFieldName<this>>, K> {
+		const result: any = {};
+		const config = getEntityConfigWithoutCheck(this.constructor)!;
+		for (const col of config.fields) {
+			if (keys.includes(col.prop as K)) continue;
+			result[col.prop] = this[col.prop as K];
+		}
+		return result;
+	}
+}
+
+function entityConfigOf(target: any): IEntityConfig {
+	const cnf = target.__entity_config__ as IEntityConfig;
+
+	if (!cnf) target.__entity_config__ = {
+		clazz: target,
+		fields: [],
+		joins: []
+	};
+	else if (cnf.clazz != target) target.__entity_config__ = {
+		...cnf,
+		clazz: target,
+		fields: [...cnf.fields],
+		joins: [...cnf.joins],
+	}
+	return target.__entity_config__;
+}
+
+function getEntityConfigWithoutCheck(target: any): IEntityConfig | null {
+	return target?.__entity_config__ ?? null;
+}
+
+
+/**
+ * 指定实体的表名
+ * @param table 表名，如果需要指定schema，可以使用"<schema>.<table>"的格式
+ */
+export function Table(table: string): Decorators.ClassDecorator<BasicEntity> {
+	return function (target) {
+		const [schema, tbl] = table.split(".").map(s => s.trim()).filter(s => !!s);
+		const conf = entityConfigOf(target);
+		conf.table = table;
+		if (!tbl) {
+			conf.schema = undefined;
+			conf.table = schema;
+		}
+		else {
+			conf.schema = schema;
+			conf.table = tbl;
+		}
+	}
+}
+
+/**
+ * 定义一个字段
+ * @param name 字段名称
+ * @param encode 字段编码凡是
+ * @param decode 字段解码方式
+ * @param primary 是否是主键
+ */
+export function Field(name: string | undefined, encode: IEntityFieldConfig["encode"], decode: IEntityFieldConfig["decode"], primary: boolean): Decorators.PropDecorator<BasicEntity> {
+	return function (target, propertyKey) {
+		const conf = entityConfigOf(target.constructor)
+		conf.fields.push({ name: name ?? propertyKey, prop: propertyKey, encode, decode, primary });
+	}
+}
+
+
+/**
+ * 定义一个整形字段
+ * @param name 字段名称
+ * @param option 字段选项
+ */
+export function IntColumn(name: string, option?: { primary: boolean }): Decorators.PropDecorator<BasicEntity>
+export function IntColumn(option?: { primary: boolean }): Decorators.PropDecorator<BasicEntity>
+export function IntColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name;
+		name = undefined;
+	}
+	return Field(name, v => escapeValue(v), v => v, option?.primary ?? false);
+}
+
+
+/**
+ * 定义浮点数(包括定点小数)
+ * @param name 字段名称
+ */
+export function FloatColumn(name?: string) { return Field(name, v => escapeValue(v), v => v, false); }
+
+
+/**
+ * 定义字符串字段(支持，char varchar text)
+ * @param name 字段名称
+ * @param option 字段选项
+ */
+export function StringColumn(name: string, option?: { primary?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function StringColumn(option?: { primary?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function StringColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name
+		name = undefined
+	}
+	return Field(name, v => escapeValue(v), v => v, option?.primary ?? false);
+}
+
+/**
+ * 定义布尔字段
+ * @param name 字段名称
+ */
+export function BooleanColumn(name?: string) {
+	const checker = (v: any) => {
+		if (typeof v == "boolean") return v;
+		if (typeof v != "string") return false;
+		v = v.toLowerCase();
+		return ["true", "yes", "on"].includes(v)
+	}
+
+	return Field(name, (v) => escapeValue(checker(v)), checker, false);
+}
+
+/**
+ * 定义日期字段
+ * @param name 字段名称
+ */
+export function DateColumn(name?: string) {
+	return Field(name, v => {
+		if (v instanceof DateColumn) v = moment(v);
+		if (typeof v == "string") v = moment(v);
+		if (!moment.isMoment(v)) return escapeValue(null);
+		return escapeValue(v.format("YYYY-MM-DD"));
+	}, v => {
+		if (typeof v == "string" || (v instanceof global.Date)) return moment(v).format("YYYY-MM-DD");
+		return null;
+	}, false);
+}
+
+/**
+ * 定义日期时间字段
+ * @param name 字段名称
+ */
+export function DateTimeColumn(name?: string) {
+	return Field(name, v => {
+		if (v instanceof DateColumn) v = moment(v);
+		if (typeof v == "string") v = moment(v);
+		if (!moment.isMoment(v)) return escapeValue(null);
+		return escapeValue(v.format("YYYY-MM-DD HH:mm:ss"));
+	}, v => {
+		if (typeof v == "string" || (v instanceof global.Date)) return moment(v).format("YYYY-MM-DD HH:mm:ss");
+		return null;
+	}, false);
+}
+
+
+//数组定义
+function _Array<T>(name: string | undefined, typeName: string, itemEncoder: (v: any) => (string | null), itemDecoder: ((v: any) => (T | null)) | undefined) {
+	return Field(name, v => {
+		if (!(v instanceof Array)) throw new DatabaseError("DB_ENTITY_FIELD_NOT_ARRAY", `字段${name}需要给定一个数组`);
+		return escapeValue(`{${v.map(item => itemEncoder(item)).join(",")}}`) + `::${typeName}`;
+	}, v => {
+		if (!(v instanceof Array)) return null;
+		if (itemDecoder) return v.map(item => itemDecoder(item));
+		else return v;
+	}, false);
+}
+
+/**
+ * 定义整数数组，可以通过option.bytes来设置整数长度，默认为4
+ * @param name 字段名称
+ * @param option 字段选项
+ */
+export function IntArrayColumn(name: string, option?: { bytes?: 2 | 4 | 8 }): Decorators.PropDecorator<BasicEntity>
+export function IntArrayColumn(option?: { bytes?: 2 | 4 | 8 }): Decorators.PropDecorator<BasicEntity>
+export function IntArrayColumn(name?: any, option?: any) {
+	if (name && typeof name !== "string") {
+		option = name
+		name = undefined
+	}
+
+	return _Array(name, `int${option?.bytes ?? 4}[]`, item => {
+		item = parseInt(item);
+		if (isNaN(item) || !isFinite(item)) return null;
+		return item.toString();
+	}, item => {
+		item = parseInt(item);
+		if (isNaN(item) || !isFinite(item)) return null;
+		return item;
+	});
+}
+
+/**
+ * 定义字符串数组
+ * @param name 字段名称
+ */
+export function StringArrayColumn(name?: string) {
+	return _Array(name, "varchar[]", item => {
+		if (typeof item == "string") return item;
+		else return null;
+	}, item => item);
+}
+
+/**
+ * 定义jsonb字段
+ * @param name 字段名称
+ */
+export function JsonColumn(name?: string) {
+	return Field(name, v => escapeValue(JSON.stringify(v)) + "::jsonb", v => v, false);
+}
+
+/**
+ * 定义tsvector字段
+ * @param name 字段名称
+ */
+export function TSVectorColumn(name?: string) {
+	return Field(name, v => {
+		if (!(v instanceof TSVector)) throw new DatabaseError("DB_ENTITY_FIELD_NOT_TSVECTOR", `字段${name}需要给定一个TSVector`)
+		return `E'${v.value}'::tsvector`;
+	}, v => TSVector.fromValue(v), false);
+}
+
+//获取实体配置
+export function getEntityConfig(clazz: any) {
+	const conf = getEntityConfigWithoutCheck(clazz);
+	if (!conf) throw new DatabaseError("DB_ENTITY_NOT_DECLARE", `实体${clazz.name}未注册`);
+	return conf;
+}
+
+//获取表名
+export function getTableName(clazz: any) {
+	const tname = getEntityConfigWithoutCheck(clazz)?.table;
+	if (!tname) throw new DatabaseError("DB_ENTITY_TABLE_NOT_DECLARE", `实体${clazz.name}缺少表格装饰`);
+	return tname;
+}
+
+//获取字段配置
+export function getField(clazz: any, prop: string) {
+	const field = getEntityConfigWithoutCheck(clazz)?.fields.find(f => f.prop == prop);
+	if (!field) throw new DatabaseError("DB_ENTITY_FIELD_NOT_DECLARE", `实体${clazz.name}缺少字段${prop}的装饰`);
+	return field;
+}
+
+//获取字段名
+export function getFieldName(clazz: any, prop: string) {
+	return getField(clazz, prop).name;
+}
+
+//获取主键字段名
+export function getPrimaryFieldName(clazz: any) {
+	const pname = getEntityConfigWithoutCheck(clazz)?.fields.find(f => f.primary)?.name;
+	if (!pname) throw new DatabaseError("DB_ENTITY_FIELD_NOT_DECLARE", `实体${clazz.name}缺少主键装饰`);
+	return pname;
+}
+
+export function getJoin(clazz: any, prop: string) {
+	const join = getEntityConfigWithoutCheck(clazz)?.joins.find(j => j.prop == prop);
+	if (!join) throw new DatabaseError("DB_ENTITY_JOIN_NOT_DECLARE", `实体${clazz.name}的${prop}属性缺少join装饰`);
+	return join;
+}
+
+/**
+ * 一对一或多对一Join
+ * @param entity 要Join的实体
+ * @param propOrBuilder Join的字段或Join构造器
+ */
+export function JoinOne<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, prop: IDLikeFieldName<T>): Decorators.PropDecorator<T>
+export function JoinOne<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, prop: IDLikeFieldName<T>, ref: IDLikeFieldName<E>): Decorators.PropDecorator<T>
+export function JoinOne<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, builder: ((cur: string, dst: string) => string)): Decorators.PropDecorator<T>
+export function JoinOne<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, propOrBuilder: IDLikeFieldName<T> | ((cur: string, dst: string) => string), ref?: IDLikeFieldName<E>): Decorators.PropDecorator<T> {
+	return function (target, propertyKey) {
+		const conf = entityConfigOf(target.constructor);
+		conf.joins.push({
+			prop: propertyKey,
+			entity: entity,
+			many: false,
+			builder: (cur, dst) => {
+				if (typeof propOrBuilder == "function") return propOrBuilder(cur, dst);
+				const refName = ref ? getFieldName(entity(), ref as string) : getPrimaryFieldName(entity());
+				// return `"${cur}"."${getFieldName(target.constructor, propOrBuilder as string)}"="${dst}"."${getPrimaryFieldName(entity())}"`
+				return `${escapeID(cur, getFieldName(target.constructor, propOrBuilder as string))}=${escapeID(dst, refName)}`
+			}
+		});
+	}
+}
+
+
+/**
+ * 一对多Join
+ * @param entity 要Join的实体
+ * @param prop Join的字段
+ * @param ref 当前表引用的字段
+ * @param builder Join构造器
+ */
+export function JoinMany<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, prop: IDLikeFieldName<E>): Decorators.PropDecorator<T>
+export function JoinMany<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, prop: IDLikeFieldName<E>, ref: IDLikeFieldName<T>): Decorators.PropDecorator<T>
+export function JoinMany<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, builder: ((cur: string, dst: string) => string)): Decorators.PropDecorator<T>
+export function JoinMany<T extends BasicEntity, E extends BasicEntity>(entity: () => Class<E>, propOrBuilder: IDLikeFieldName<E> | ((cur: string, dst: string) => string), ref?: IDLikeFieldName<T>): Decorators.PropDecorator<T> {
+	return function (target, propertyKey) {
+		const conf = entityConfigOf(target.constructor);
+		conf.joins.push({
+			prop: propertyKey,
+			entity: entity,
+			many: true,
+			builder: (cur, dst) => {
+				if (typeof propOrBuilder == "function") return propOrBuilder(cur, dst);
+				const refName = ref ? getFieldName(target.constructor, ref as string) : getPrimaryFieldName(target.constructor);
+				// return `"${dst}"."${getFieldName(entity(), propOrBuilder as string)}"="${cur}"."${getPrimaryFieldName(target.constructor)}"`
+				return `${escapeID(dst, getFieldName(entity(), propOrBuilder as string))}=${escapeID(cur, refName)}`
+			}
+		});
+	}
+}
+
--- a/src/error.ts
+++ b/src/error.ts
@ -0,0 +1,6 @@
+/** 数据库错误 */
+export class DatabaseError extends Error {
+	constructor(public readonly code: string, message: string) {
+		super(message);
+	}
+}
--- a/src/index.ts
+++ b/src/index.ts
@ -0,0 +1,13 @@
+export {
+	Table,
+	Field, IntColumn, FloatColumn, StringColumn, BooleanColumn, DateColumn, DateTimeColumn, JsonColumn,
+	IntArrayColumn, StringArrayColumn,
+	TSVectorColumn,
+	JoinOne, JoinMany,
+	BasicEntity,
+} from "./entity";
+
+export * from "./type";
+export * from "./database";
+export * from "./error";
+export * from "./util";
--- a/src/query.ts
+++ b/src/query.ts
@ -0,0 +1,856 @@
+import { Pool, PoolClient, QueryResult, QueryResultRow } from "pg";
+import { BasicEntity, IEntityFieldConfig, IEntityJoinConfig, getEntityConfig, getField, getJoin, getTableName } from "./entity";
+import type { JoinaFieldName, Class, ArrayTypeSelf, Values } from "./types";
+import { escapeID, escapeValue, formatSQL } from "./util";
+
+
+//编译器原因，不加此段代码会出错，具体原因未知，请保持定义和entity.ts重的同名定义一致
+/** 取基础类型的字段名 */
+export type BasicFieldName<T extends BasicEntity> = Values<{ [P in keyof T]:
+	//忽略never
+	Exclude<T[P], null | undefined> extends never ? never : (
+		//忽略函数
+		Exclude<T[P], null | undefined> extends Function ? never : (
+			//忽略实体
+			ArrayTypeSelf<Exclude<T[P], null | undefined>> extends BasicEntity ? never : (
+				P
+			)
+		)
+	)
+}>;
+
+interface IQueryFunc<R extends QueryResultRow = any> {
+	(sql: string, args?: any[]): Promise<QueryResult<R>>
+}
+
+
+type StringArgs<Str extends string, P extends string, S extends string> = Str extends `${string}${P}${infer R}${S}${infer T}` ? (R | StringArgs<T, P, S>) : never;
+
+
+type BasicWhere<V> = never
+	| { in: V[] } | { nin: V[] }
+	| { ne: V | null } | { gt: V } | { gte: V } | { lt: V } | { lte: V }
+	| { like: string } | { nlike: string }
+
+type ConditionOption<E extends BasicEntity> = { [P in BasicFieldName<E>]?: Exclude<E[P], null | undefined> | BasicWhere<Exclude<E[P], null | undefined>> | null }
+
+/** 搜索选项映射关系 */
+interface ISearchOptionMap {
+	/** tsquery搜索 */
+	tsquery: string | string[] | {
+		/** 关键字 */
+		keywords: string | string[]
+		/** 是否进行绝对匹配，如果为true，则只匹配关键字，否则匹配关键字前缀，默认true */
+		absolute?: boolean
+		/** 匹配方式，默认or */
+		method?: "or" | "and"
+	}
+	/** like搜索 */
+	like: string | {
+		/** 搜索关键字 */
+		keywords: string
+		/** 搜索方式， left表示左匹配，right表示右匹配，both表示两边匹配，默认both */
+		method?: "left" | "right" | "both"
+	}
+}
+
+interface IWhereFn<E extends BasicEntity> {
+	/**
+	 * 设置where条件
+	 * @param option 条件选项
+	 * @param sql 自定义sql
+	 * @param args sql参数
+	 */
+	where(option: ConditionOption<E>): this
+	where(sql: string, args?: any[]): this
+	where<S extends string>(sql: S, args: { [P in StringArgs<S, "{:", "}">]: any }): this
+
+	/**
+	 * 添加搜索条件
+	 * 
+	 * 搜索条件会单独生成一段where语句，并与其他where条件使用AND连接
+	 * 
+	 * @param type 搜索类型
+	 * @param field 搜索字段
+	 * @param option 搜索选项
+	 */
+	search<T extends keyof ISearchOptionMap>(type: T, field: BasicFieldName<E>, option: ISearchOptionMap[T]): this
+}
+
+interface IJoinFn<E extends BasicEntity> {
+	/**
+	 * 进行JOIN操作
+	 * @param name 字段名称
+	 * @param callback Join后的具体操作
+	 */
+	join<N extends JoinaFieldName<E>>(name: N, callback?: (joinner: IJoinBuilder<JoinedEntity<E, N>>) => any): this
+
+	/**
+	 * 进行JOIN操作
+	 * @param name 字段名称
+	 * @param alias JOIN别名
+	 * @param callback Join后的具体操作
+	 */
+	join<N extends JoinaFieldName<E>>(name: N, alias: string, callback?: (joinner: IJoinBuilder<JoinedEntity<E, N>>) => any): this
+}
+
+interface IFilterFn<E extends BasicEntity> {
+	/**
+	 * 查询字段过滤
+	 * @param columns 要查询的字段，如果补传递则查询所有字段
+	 */
+	filter(...columns: Array<BasicFieldName<E> | { [P in BasicFieldName<E>]+?: string }>): this
+	/**
+	 * 排除字段
+	 * @param columns 要排除的字段
+	 */
+	exclude(...columns: Array<BasicFieldName<E>>): this
+	/**
+	 * 忽略当前实体的字段
+	 */
+	ignore(): this
+	/**
+	 * 添加列
+	 * @param column 列名称
+	 * @param alias 别名
+	 */
+	add(column: BasicFieldName<E>, alias?: string): this
+
+	/**
+	 * 添加自定义列
+	 * @param column 自定义列
+	 * @param alias 别名
+	 */
+	add(column: () => string, alias: string): this
+}
+
+interface IReturningFn<E extends BasicEntity> {
+	/**
+	 * 设置返回字段
+	 * @param columns 要返回的字段
+	 */
+	returning(...columns: Array<BasicFieldName<E>>): this
+}
+
+interface IGroupFn<E extends BasicEntity> {
+	/**
+	 * 分组
+	 * @param name 分组名称
+	 */
+	group(...name: Array<(keyof E) | (() => string)>): this
+}
+
+export interface ISelectBuilder<E extends BasicEntity> extends IWhereFn<E>, IFilterFn<E>, IJoinFn<E> {
+	/**
+	 * 设置查询偏移
+	 * @param offset 查询偏移
+	 */
+	offset(offset: number): this
+
+	/**
+	 * 设置查询数量
+	 * @param limit 查询数量
+	 */
+	limit(limit: number): this
+
+	/**
+	 * 排序
+	 * @param name 排序名称
+	 * @param sort 排序方式
+	 */
+	order(name: string, sort: "asc" | "desc"): this
+	/**
+	 * 排序
+	 * @param name 排序名称
+	 * @param sort 排序方式
+	 */
+	order(name: keyof E, sort: "asc" | "desc"): this
+
+	// __sql__(count: boolean): string
+
+	/** 查询数据 */
+	find(): Promise<E[]>
+
+	/** 查询一条数据 */
+	findOne(): Promise<E | null>
+
+	/** 仅查询数量 */
+	count(): Promise<number>
+
+	/** 查询数据和数量 */
+	findAndCount(): Promise<[data: E[], count: number]>
+
+	/** 仅执行sql语句 */
+	query<T>(): Promise<T[]>;
+}
+
+export interface IInsertBuilder<E extends BasicEntity> extends IReturningFn<E> {
+	/**
+	 * 设置要插入的数据
+	 * @param data 要插入的数据
+	 */
+	data<Name extends BasicFieldName<E>>(data: Pick<E, Name> | Pick<E, Name>[]): this;
+
+	/** 执行插入 */
+	query(): Promise<E[]>
+}
+
+export interface IUpdateBuilder<E extends BasicEntity> extends IWhereFn<E>, IReturningFn<E> {
+	/**
+	 * 设置更新数据
+	 * @param data 要更新的数据
+	 */
+	set(data: Partial<Pick<E, BasicFieldName<E>>>): this
+
+	/** 执行更新 */
+	query(): Promise<E[]>
+}
+
+export interface IDeleteBuilder<E extends BasicEntity> extends IWhereFn<E>, IReturningFn<E> {
+	/** 执行更新 */
+	query(): Promise<E[]>
+}
+
+interface IJoinBuilder<E extends BasicEntity> extends IWhereFn<E>, IFilterFn<E>, IJoinFn<E> {
+	/**
+	 * 设置on条件
+	 * @param option 条件选项
+	 * @param sql 自定义sql
+	 * @param args sql参数
+	 */
+	on(option: ConditionOption<E>): this
+	on(sql: string, args?: any[]): this
+	on<S extends string>(sql: S, args: { [P in StringArgs<S, "{:", "}">]: any }): this
+}
+
+
+type Real<T> = Exclude<T, null | undefined>
+type JoinedEntity<E, N extends keyof E> = Real<E[N]> extends Array<infer R> ? (R extends BasicEntity ? R : never) : (Real<E[N]> extends BasicEntity ? Real<E[N]> : never);
+
+type Constructor<E extends BasicEntity> = new (...args: any[]) => SQLBuilder<E>;
+
+class SQLBuilderContext {
+	#nameDict: Record<string, number> = {};
+	#groups: string[] = [];
+	#searchs: string[] = [];
+
+	public genName(name: string) {
+		this.#nameDict[name] ??= 0;
+		const idx = ++this.#nameDict[name];
+		return `${name}${idx}`;
+	}
+
+	public addGroup(name: string) { this.#groups.push(name); }
+
+	public get groups() { return this.#groups; }
+
+	public addSearch(search: string) { this.#searchs.push(search); }
+
+	public get searchs() { return this.#searchs; }
+}
+
+class SQLBuilder<E extends BasicEntity> {
+	#E: Class<E>
+	#alias: string
+	#ctx: SQLBuilderContext
+
+	constructor(ctx: SQLBuilderContext, entity: Class<E>, alias: string | undefined) {
+		this.#ctx = ctx;
+		this.#E = entity;
+		this.#alias = alias ?? this.tableName;
+	}
+
+	/** 实体类 */
+	public get clazz() { return this.#E; }
+
+	/** 上下文 */
+	public get ctx() { return this.#ctx; }
+
+	/** 实体配置 */
+	public get config() { return getEntityConfig(this.#E); }
+
+	/** 取表别名 */
+	public get alias() { return this.#alias; }
+
+	/** 表名称 */
+	public get tableName() { return getTableName(this.#E); }
+
+	/** 获取表名SQL */
+	public get tableSQL() {
+		const config = getEntityConfig(this.#E);
+		if (config.schema) return escapeID(config.schema, config.table);
+		return escapeID(config.table);
+	}
+
+	/** 字段遍历 */
+	public eachField<R = unknown>(callback: (field: IEntityFieldConfig) => R): Array<R> {
+		const fields = getEntityConfig(this.#E).fields;
+		return fields.map(f => callback(f))
+	}
+
+	/** 获取字段配置 */
+	public fieldc(prop: string) {
+		return getField(this.#E, prop);
+	}
+
+	/** 获取join配置 */
+	public joinc(prop: string) {
+		return getJoin(this.#E, prop);
+	}
+
+	/** 获取主键字段 */
+	public get primaries() {
+		return getEntityConfig(this.#E).fields.filter(f => f.primary);
+	}
+
+	/** 获取主键字段名 */
+	public get primaryNames() {
+		return this.primaries.map(p => p.name);
+	}
+
+	public buildEntity(data: any) {
+		const e = new this.#E();
+		for (const field of this.config.fields) {
+			const val = data[`${this.alias}__${field.prop}`];
+			e[field.prop as keyof E] = (val === null || val === undefined) ? val : field.decode(val);
+		}
+		return e;
+	}
+
+	#checkPrimary<D>(dataItem: D) {
+		return this.primaries.every(p => {
+			const val = (dataItem as any)[`${this.alias}__${p.prop}`];
+			return val !== null && val !== undefined;
+		})
+	}
+
+	public __build__<D>(data: D[], joinners: Joinner<any>[]) {
+		const map: Array<[E, D[]]> = [];
+
+		//数据分组
+		for (const item of data) {
+			//空主键
+			if (!this.#checkPrimary(item)) continue;
+			let mapItem = map.findLast(([e, d]) => {
+				return this.primaries.every(p => e[p.prop as keyof E] === item[`${this.alias}__${p.prop}` as keyof D] as any)
+			});
+			if (mapItem) mapItem[1].push(item);
+			else map.push([this.buildEntity(item) as E, [item]]);
+		}
+
+		//子数据
+		return map.map(([val, data]) => {
+			for (const joinner of joinners) joinner.build(val, data);
+			return val;
+		});
+	}
+}
+
+
+function WithFilter<E extends BasicEntity, B extends Constructor<E>>(Base: B) {
+	return class extends Base implements IFilterFn<E> {
+		#columns?: Array<[string, string]>;
+		#customColumns: Array<[string, string]> = [];
+
+		public filter(...columns: Array<BasicFieldName<E> | { [P in BasicFieldName<E>]+?: string }>) {
+			this.#columns = [];
+			if (!columns.length) columns = this.config.fields.map(f => f.prop as BasicFieldName<E>);
+			for (const col of columns) {
+				if (typeof col == "string") this.#columns.push([escapeID(this.alias, this.fieldc(col).name), escapeID(`${this.alias}__${col}`)]);
+				else for (const [k, asName] of Object.entries(col)) {
+					this.#columns.push([escapeID(this.alias, this.fieldc(k as string).name), asName as string]);
+				}
+			}
+			return this;
+		}
+
+		public exclude(...columns: Array<BasicFieldName<E>>) {
+			this.#columns = [];
+			for (const col of this.config.fields) {
+				if (columns.includes(col as any)) continue;
+				this.#columns.push([escapeID(this.alias, col.name), escapeID(`${this.alias}__${col.prop}`)]);
+			}
+			return this;
+		}
+
+		public ignore() {
+			this.#columns = [];
+			return this;
+		}
+
+		public add(column: any, alias?: string) {
+			if (typeof column == "string") this.#customColumns.push([escapeID(column), escapeID(alias ?? column)]);
+			else if (typeof column == "function") this.#customColumns.push([column(), escapeID(alias!)]);
+			return this;
+		}
+
+		/** 字段列表 */
+		public get columns() {
+			//如果没有则构建所有字段
+			if (!this.#columns) this.filter(...this.eachField(f => f.prop as BasicFieldName<E>));
+			//返回字段
+			return [...this.#columns!, ...this.#customColumns];
+		}
+	}
+}
+
+
+/**
+ * 构建条件语句，可用于where、having、on等语句
+ * @param builder SQLBuilder
+ * @param option 条件选项或条件语句
+ * @param args 条件语句参数
+ */
+function buildCondition<E extends BasicEntity>(builder: SQLBuilder<E>, option: ConditionOption<any> | string, args?: any) {
+	if (typeof option == "string") {
+		if (typeof args === "undefined") return option;
+		else return formatSQL(option, args);
+	}
+	else {
+		const wheres: string[] = [];
+		for (const [col, topVal] of Object.entries(option)) {
+			const field = builder.fieldc(col);
+			const fieldName = escapeID(builder.alias, field.name);
+			if (topVal === null) wheres.push(`${fieldName} is null`);
+			else if (typeof topVal == "object") {
+				for (let [op, opv] of Object.entries(topVal as BasicWhere<any>) as [string, any][]) {
+					switch (op) {
+						case "in":
+							wheres.push(`${fieldName} in (${(opv as any[]).map(v => field.encode(v)).join(",")})`);
+							break;
+						case "nin":
+							wheres.push(`${fieldName} not in (${(opv as any[]).map(v => field.encode(v)).join(",")})`);
+							break
+						case "ne":
+							if (opv === null) wheres.push(`${fieldName} is not null`);
+							else wheres.push(`${fieldName}!=${field.encode(opv)}`);
+							break;
+						case "gt":
+							wheres.push(`${fieldName}>${field.encode(opv)}`);
+							break;
+						case "gte":
+							wheres.push(`${fieldName}>=${field.encode(opv)}`);
+							break;
+						case "lt":
+							wheres.push(`${fieldName}<${field.encode(opv)}`);
+							break;
+						case "lte":
+							wheres.push(`${fieldName}<=${field.encode(topVal)}`);
+							break;
+						case "like":
+							wheres.push(`${fieldName} like ${escapeValue(opv)}`);
+							break;
+						case "nlike":
+							wheres.push(`${fieldName} note like ${escapeValue(opv)}`);
+							break;
+						default:
+							break;
+					}
+				}
+			}
+			else if (typeof topVal !== "undefined") wheres.push(`${fieldName}=${field.encode(topVal)}`);
+		}
+		return wheres.join(" and ");
+	}
+}
+
+/** Where 混入 */
+function WithWhere<E extends BasicEntity, B extends Constructor<E>>(Base: B) {
+	return class extends Base implements IWhereFn<E> {
+		#wheres: string[] = [];
+
+		public where(option: ConditionOption<any> | string, args?: any) {
+			const where = buildCondition(this, option, args);
+			if (where) this.#wheres.push(where);
+			return this;
+		}
+
+		public search<T extends keyof ISearchOptionMap>(type: T, field: BasicFieldName<E>, option: ISearchOptionMap[T]) {
+			const fieldName = escapeID(this.alias, field as string);
+			switch (type) {
+				case "tsquery": {
+					const opt = option as ISearchOptionMap["tsquery"];
+					let keywords: string[];
+					let method: "or" | "and" = "or";
+					let absolute = true;
+					//处理选项
+					if (typeof opt === "string") keywords = opt.split(/\s+/).map(s => s.trim()).filter(s => s.length);
+					else if (opt instanceof Array) keywords = opt;
+					else {
+						if (typeof opt.keywords === "string") keywords = opt.keywords.split(/\s+/).map(s => s.trim()).filter(s => s.length);
+						else keywords = opt.keywords;
+						if (opt.method) method = opt.method;
+						if (typeof opt.absolute == "boolean") absolute = opt.absolute;
+					}
+					//生成tsquery
+					if (keywords.length) {
+						const sql = keywords.map(k => absolute ? k : `${k}:*`).join(method == "or" ? "|" : "&");
+						this.ctx.addSearch(`${fieldName} @@ to_tsquery(${escapeValue(sql)})`);
+					}
+					break;
+				}
+				case "like": {
+					const opt = option as ISearchOptionMap["like"];
+					const keywords = ((typeof opt === "string") ? opt : opt.keywords).trim();
+					if (keywords.length) {
+						const method = (typeof opt === "object") ? (opt.method ?? "both") : "both";
+						switch (method) {
+							case "left":
+								this.ctx.addSearch(`${fieldName} like ${escapeValue(`${keywords}%`)}`);
+								break;
+							case "right":
+								this.ctx.addSearch(`${fieldName} like ${escapeValue(`%${keywords}`)}`);
+								break;
+							case "both":
+								this.ctx.addSearch(`${fieldName} like ${escapeValue(`%${keywords}%`)}`);
+								break;
+							default:
+								break;
+						}
+					}
+					break;
+				}
+			}
+			return this;
+		}
+
+		public get wheres() { return this.#wheres; }
+	};
+}
+
+/** Join 混入 */
+function WithJoin<E extends BasicEntity, B extends Constructor<E>>(Base: B) {
+	return class extends Base implements IJoinFn<E> {
+		#joinners: Joinner<any>[] = [];
+
+		public join(name: string, alias?: any, callback?: any) {
+			const joinConfig = this.joinc(name as string);
+			const JoinEntity = joinConfig.entity();
+			if (typeof callback == "undefined" && typeof alias == "function") {
+				callback = alias;
+				alias = undefined;
+			}
+			const joinner = new Joinner(this, name, this.alias, JoinEntity, joinConfig, alias ?? name);
+			this.#joinners.push(joinner);
+			if (callback) callback(joinner);
+			return this;
+		}
+
+		public get joinners() { return this.#joinners; }
+	}
+}
+
+/** Group by 混入 */
+function WithGroup<E extends BasicEntity, B extends Constructor<E>>(Base: B) {
+	return class extends Base implements IGroupFn<E> {
+
+		public group(...name: Array<keyof E | (() => string)>) {
+			for (const item of name) {
+				if (typeof item == "function") this.ctx.addGroup(item());
+				else if (typeof item == "string") this.ctx.addGroup(escapeID(this.alias, item));
+			}
+			return this;
+		}
+	}
+}
+
+/** Returning 混入 */
+function WithReturning<E extends BasicEntity, B extends Constructor<E>>(Base: B) {
+	return class extends Base implements IReturningFn<E> {
+		#returning?: string[]
+
+		public returning(...columns: Array<BasicFieldName<E>>) {
+			if (!columns.length) columns = this.config.fields.map(c => c.name as BasicFieldName<E>);
+			this.#returning = columns.map(c => `${escapeID(this.alias, c as string)} as ${escapeID(`${this.alias}__${c as string}`)}`);
+			return this;
+		}
+
+		public get returnings() { return this.#returning; }
+
+		public get returningsWithDefault() {
+			return this.returnings ?? this.primaries.map(c => `${escapeID(this.alias, c.name)} as ${escapeID(`${this.alias}__${c.prop}`)}`);
+		}
+
+		public buildReturningData<D>(data: D[]) { return data.map(d => this.buildEntity(d)); }
+	}
+}
+
+class Joinner<E extends BasicEntity> extends WithGroup(WithJoin(WithWhere(WithFilter(SQLBuilder))))<E> implements IJoinBuilder<E> {
+	#joinName: string
+	#joinConfig: IEntityJoinConfig
+	#baseName: string
+	#origin: SQLBuilder<any>
+	#ons: string[] = [];
+
+	public constructor(origin: SQLBuilder<any>, baseName: string, joinName: string, entity: Class<E>, config: IEntityJoinConfig, alias: string) {
+		super(origin.ctx, entity, alias);
+		this.#origin = origin;
+		this.#baseName = baseName;
+		this.#joinName = joinName;
+		this.#joinConfig = config;
+	}
+
+	public on(option: ConditionOption<any> | string, args?: any) {
+		const onSQL = buildCondition(this, option, args);
+		if (onSQL) this.#ons.push(onSQL);
+		return this;
+	}
+
+	public get __select_columns__(): Array<[name: string, alias: string]> {
+		const result = [...this.columns];
+		this.joinners.forEach(j => result.push(...j.__select_columns__));
+		return result;
+	}
+
+	public get __wheres__(): string[] {
+		const result = [...this.wheres];
+		this.joinners.forEach(j => result.push(...j.__wheres__));
+		return result;
+	}
+
+	public get __join_sql__() {
+		const onSQL = [
+			`${this.#joinConfig.builder(this.#joinName, this.alias)}`,
+			...this.#ons,
+		].join(" and ");
+		return `left join ${this.tableSQL} ${escapeID(this.alias)} on ${onSQL}`;
+	}
+
+	public build<BE extends BasicEntity, D>(base: BE, data: D[]) {
+		const parsed = this.__build__(data, this.joinners);
+		if (this.#joinConfig.many) base[this.#baseName as keyof BE] = parsed as any;
+		else base[this.#baseName as keyof BE] = (parsed[0] ?? null) as any;
+	}
+}
+
+export class SelectBuilder<E extends BasicEntity> extends WithGroup(WithJoin(WithWhere(WithFilter(SQLBuilder))))<E> implements ISelectBuilder<E> {
+	#offset?: number
+	#limit?: number
+	#orders?: Array<[name: string, order: "asc" | "desc"]>
+	#query: IQueryFunc<any>
+	#fullJoinners?: Joinner<any>[]
+
+	constructor(query: IQueryFunc<any>, entity: Class<E>, alias?: string) {
+		super(new SQLBuilderContext(), entity, alias);
+		this.#query = query;
+	}
+
+	public offset(offset: number) {
+		this.#offset = offset;
+		return this;
+	}
+
+	public limit(limit: number) {
+		this.#limit = limit;
+		return this;
+	}
+
+	public order(name: any, sort: "asc" | "desc") {
+		this.#orders ??= [];
+		const col = this.config.fields.find(f => f.prop === name);
+		if (col) this.#orders.push([escapeID(this.alias, col.name), sort]);
+		else this.#orders.push([name, sort]);
+		return this;
+	}
+
+	public async find() {
+		const sql = this.__sql__(false);
+		// console.log(sql);
+		const result = await this.#query(sql);
+		const ret = this.build(result.rows);
+		return ret as E[];
+	}
+
+	async findOne() { return this.find().then(res => res[0] ?? null); }
+
+	async count() {
+		const sql = `select count(*) as __data_count__ from (\n\t${this.__inner_sql__(false, "\n\t")}\n)`;
+		const res = await this.#query(sql);
+		return parseInt(res.rows[0].__data_count__) as number
+	}
+
+	async findAndCount() {
+		const res = await this.#query(this.__sql__(true));
+		const count = res.rows[0]?.__data_count__ ?? 0;
+		return [this.build(res.rows) as E[], parseInt(count)] as [E[], number];
+	}
+
+	async query<T>(): Promise<T[]> {
+		const sql = this.__sql__(false);
+		const res = await this.#query(sql);
+		return res.rows;
+	}
+
+	public get __select_columns__() {
+		const result = [...this.columns];
+		this.joinners.forEach(j => result.push(...j.__select_columns__));
+		return result.map(([c, a]) => `${c} as ${a}`)
+	}
+
+	#whereCache: string | undefined = undefined;
+	public get __wheres__() {
+		if (!this.#whereCache) {
+			const result = [...this.wheres];
+			this.joinners.forEach(j => result.push(...j.__wheres__));
+			if (this.ctx.searchs.length) result.push(this.ctx.searchs.join(" or "))
+			this.#whereCache = result.join(" and ");
+		}
+		return this.#whereCache;
+	}
+
+	private getAllJoinners(joinners: Joinner<any>[]) {
+		const result = [...joinners];
+		joinners.forEach(j => result.push(...this.getAllJoinners(j.joinners)));
+		return result;
+	}
+
+	public get __joins__() {
+		this.#fullJoinners ??= this.getAllJoinners(this.joinners);
+		return this.#fullJoinners.map(j => j.__join_sql__)
+	}
+
+	public __inner_sql__(count: boolean, join = "\n") {
+		//内部的join
+		const innerSQLItems = [
+			`select ${escapeID(this.alias)}.*${count ? `, count(*) over () as __data_count__` : ''}`,			 					//字段列表
+			`from ${this.tableSQL} ${escapeID(this.alias)}`,																		//表名
+			...this.__joins__,																										//join
+			...this.__wheres__.length ? [`where ${this.__wheres__}`] : [],															//where条件
+			`group by ${this.primaryNames.map(p => escapeID(this.alias, p)).join(",")}`,											//内部查询分组
+			...(!count && this.#orders?.length) ? [`order by ${this.#orders.map(([name, order]) => `${name} ${order}`).join(",")}`] : [],		//排序
+			...(typeof this.#offset == "number") ? [`offset ${this.#offset}`] : [],													//offset
+			...(typeof this.#limit == "number") ? [`limit ${this.#limit}`] : [],													//limit
+		];
+		return innerSQLItems.join(join);
+	}
+
+	public __sql__(count: boolean) {
+		//外部的SQL
+		const outterSQLItems = [
+			`select ${this.__select_columns__}${count ? `, ${escapeID(this.alias)}.__data_count__` : ''}`,			//字段列表
+			`from (\n\t${this.__inner_sql__(count, "\n\t")}\n) ${escapeID(this.alias)}`,							//子查询
+			...this.__joins__,																						//join
+			...this.__wheres__.length ? [`where ${this.__wheres__}`] : [],											//where条件
+			...this.ctx.groups.length ? [`group by ${this.ctx.groups.join(",")}`] : [],								//分组
+			...this.#orders ? [`order by ${this.#orders.map(([name, ord]) => `${name} ${ord}`).join(", ")}`] : [],	//排序
+		];
+
+		return outterSQLItems.join("\n");
+	}
+
+	public build<D>(data: D[]) {
+		return this.__build__(data, this.joinners);
+	}
+
+}
+
+export class InsertBuilder<E extends BasicEntity> extends WithReturning(SQLBuilder)<E> implements IInsertBuilder<E> {
+	#query: IQueryFunc<any>
+	#values: string[] = [];
+	#columns: string[] = [];
+
+	public constructor(query: IQueryFunc<any>, entity: Class<E>) {
+		super(new SQLBuilderContext(), entity, undefined);
+		this.#query = query;
+	}
+
+	public data<Name extends BasicFieldName<E>>(data: Pick<E, Name> | Pick<E, Name>[]) {
+		data = (data instanceof Array) ? data : [data];
+		this.#values = [];
+		this.#columns = [];
+		let columnsSet = false;
+
+		for (const item of data) {
+			const buffer: (string | null)[] = [];
+			for (const col of this.config.fields) {
+				if (!(col.prop in item)) continue;
+				const val = item[col.prop as keyof typeof item];
+				if (val === null || val === undefined) buffer.push("null");
+				else buffer.push(col.encode(val));
+				if (!columnsSet) this.#columns.push(escapeID(col.name));
+			}
+			this.#values.push(`(${buffer.join(",")})`);
+			columnsSet = true;
+		}
+
+		return this;
+	}
+
+	public async query() {
+		if (!this.#values.length) return [];
+		//构建SQL
+		const sqlItems = [
+			`insert into ${this.tableSQL} as ${escapeID(this.alias)} (${this.#columns.join(",")}) values`,
+			this.#values.join(",\n"),
+			`returning ${this.returningsWithDefault}`,
+		]
+		const sql = sqlItems.join("\n");
+
+		//执行并返回数据
+		const res = await this.#query(sql);
+		return this.buildReturningData(res.rows) as E[];
+	}
+}
+
+export class UpdateBuilder<E extends BasicEntity> extends WithReturning(WithWhere(SQLBuilder))<E> implements IUpdateBuilder<E> {
+	#query: IQueryFunc<any>
+	#updates?: string[]
+
+	public constructor(query: IQueryFunc<any>, entity: Class<E>) {
+		super(new SQLBuilderContext(), entity, undefined);
+		this.#query = query;
+	}
+
+	public set(data: Partial<Pick<E, BasicFieldName<E>>>) {
+		this.#updates = []
+		for (const col of this.config.fields) {
+			const val = data[col.prop as keyof typeof data];
+			if (val === undefined) continue;
+			if (val === null) this.#updates.push(`${escapeID(col.name)}=null`);
+			else this.#updates.push(`${escapeID(col.name)}=${col.encode(val)}`);
+		}
+		return this;
+	}
+
+	public async query() {
+		if (!this.#updates?.length) return [];
+		//构建SQL
+		const wheres = this.wheres;
+		const sqlItems = [
+			`update ${this.tableSQL} ${escapeID(this.alias)}`,
+			`set ${this.#updates.join(",")}`,
+			...wheres.length ? [`where ${wheres.join(" and ")}`] : [],
+			`returning ${this.returningsWithDefault}`,
+		]
+		const sql = sqlItems.join("\n");
+
+		//执行并构建返回数据
+		const res = await this.#query(sql);
+		return this.buildReturningData(res.rows) as E[];
+	}
+
+}
+
+export class DeleteBuilder<E extends BasicEntity> extends WithReturning(WithWhere(SQLBuilder))<E> implements IDeleteBuilder<E> {
+	#query: IQueryFunc<any>
+
+	public constructor(query: IQueryFunc<any>, entity: Class<E>) {
+		super(new SQLBuilderContext(), entity, undefined);
+		this.#query = query;
+	}
+
+	public async query() {
+		//构建SQL
+		const wheres = this.wheres;
+		const sqlItems = [
+			`delete from ${this.tableSQL} ${escapeID(this.alias)}`,
+			...wheres.length ? [`where ${wheres.join(" and ")}`] : [],
+			`returning ${this.returningsWithDefault}`,
+		]
+		const sql = sqlItems.join("\n");
+
+		//执行并构建返回数据
+		const res = await this.#query(sql);
+		return this.buildReturningData(res.rows) as E[];
+	}
+}
--- a/src/test.ts
+++ b/src/test.ts
@ -0,0 +1,104 @@
+import { database } from "./database";
+import { BasicEntity, DateTimeColumn, IntColumn, JoinOne, StringColumn, Table } from "./entity";
+
+database.config(() => ({
+	host: "127.0.0.1",
+	port: 5432,
+	user: "postgres",
+	password: "ljk5408828",
+	database: "urnas",
+	max: 100,
+}));
+
+
+/** 数据实体 */
+class DataEntity extends BasicEntity {
+	/** ID */
+	@IntColumn({ primary: true }) declare id: number
+}
+
+/** 带有时间的实体 */
+class TimedEntity extends DataEntity {
+	/** 创建时间 */
+	@DateTimeColumn() declare ctime: string
+
+	/** 修改时间 */
+	@DateTimeColumn() declare utime: string | null
+
+	/** 删除时间 */
+	@DateTimeColumn() declare dtime: string | null
+}
+
+
+export enum UserRole {
+	/** 系统管理员 */
+	SystemAdmin = 1 << 0,
+	/** 密码本管理员*/
+	CodeBookAdmin = 1 << 1,
+	/** 相册管理员 */
+	AlbumAdmin = 1 << 2,
+	/** FM管理员 */
+	FMAdmin = 1 << 3,
+
+	/** 超级用户 */
+	Super = SystemAdmin | CodeBookAdmin | AlbumAdmin | FMAdmin,
+	/** 常规用户 */
+	User = 0,
+};
+
+/** 用户 */
+@Table("user.user")
+export class User extends TimedEntity {
+	/** 账号 */
+	@StringColumn() declare number: string
+
+	/** 密码 */
+	@StringColumn() declare password: string
+
+	/** 昵称 */
+	@StringColumn() declare name: string
+
+	/** 角色 */
+	@IntColumn() declare role: UserRole
+
+	/** 邮箱 */
+	@StringColumn() declare email: string | null
+
+	/** 手机 */
+	@StringColumn() declare phone: string | null
+
+	/** 头像 */
+	@StringColumn() declare avatar: string | null
+
+	/** 登录过期时间 */
+	@DateTimeColumn() declare ttime: string
+}
+
+@Table("user.user_login")
+export class UserLogin extends DataEntity {
+	@IntColumn() declare userID: number
+
+	@JoinOne(() => User, "userID") declare user: User
+
+	@JoinOne(() => User, "userID") declare test: User
+
+	@StringColumn() declare device: string | null
+
+	@StringColumn() declare ip: string
+
+	@DateTimeColumn() declare ctime: string
+}
+
+database.select(UserLogin)
+	.join("user")
+	.join("test")
+	.find()
+	.then(res => {
+		console.log(res);
+	}).catch(err => {
+		console.error(err);
+	})
+	.finally(() => {
+		console.log("END")
+		database.close();
+	});
--- a/src/type/index.ts
+++ b/src/type/index.ts
@ -0,0 +1 @@
+export * from "./tsvector";
--- a/src/type/tsvector.ts
+++ b/src/type/tsvector.ts
@ -0,0 +1,127 @@
+import pinyin from "pinyin";
+
+export class TSVector {
+	#items: string[];
+
+
+	private constructor(items: string[]) {
+		this.#items = items;
+	}
+
+	/**
+	 * 数据库值
+	 */
+	public get value() {
+		return this.#items.join(" ");
+	}
+
+	/**
+	 * 检测是否包含指定元素
+	 * @param item 元素
+	 */
+	public contains(item: string) { return this.#items.includes(item); }
+
+	/** 获取元素列表 */
+	public get items() { return this.#items; }
+
+	/**
+	 * 添加元素
+	 * @param item 要添加的元素
+	 */
+	public push(item: string) {
+		item = item.replaceAll("'", "");
+		if (this.contains(item)) return;
+		this.#items.push(item);
+	}
+
+	/**
+	 * 删除元素
+	 * @param item 要删除的元素
+	 */
+	public remove(item: string) {
+		item = item.replaceAll("'", "");
+		const index = this.#items.indexOf(item);
+		if (index >= 0) this.#items.splice(index, 1);
+	}
+
+	/**
+	 * 从数据库值构建
+	 * @param value 数据库值
+	 */
+	public static fromValue(value: string) {
+		const items = value.split(" ").map(s => s.trim()).filter(s => !!s).map(s => s.replaceAll("'", ""));
+		return new this(items);
+	}
+
+	/**
+	 * 从关键词构建
+	 * @param keywords 关键词列表
+	 */
+	public static fromKeyworlds(keywords: string[]) {
+		const items: string[] = []
+
+		function resolvePinyin(pinyins: string[][]): string[][] {
+			if (!pinyins.length) return [];
+			let [first, ...rest] = pinyins;
+			//后续结果
+			const ties = resolvePinyin(rest);
+			//处理第一个
+			first = first.map(s => s.trim().replace(/[^a-zA-Z0-9 ]/g, "")).filter(s => !!s);
+			if (!first.length) return ties;
+
+			//组合结果
+			const result: string[][] = [];
+			for (let py of first) {
+				let leads = py.split(" ");		//这里处理一下英文和数字
+				if (ties.length) {
+					for (const tie of ties) result.push([...leads, ...tie]);
+				}
+				else result.push(leads);
+			}
+
+			//返回
+			return result;
+		}
+
+		//处理关键词
+		keywords = keywords.map(s => s.trim()).filter(s => !!s);
+
+		//屏蔽纯字母数字的关键字
+		keywords = keywords.filter(kw => {
+			if (/^[a-zA-Z0-9]+$/.test(kw)) {
+				items.push(kw);
+				return false;
+			}
+			return true;
+		})
+
+		//处理给定的每个关键词
+		for (let kw of keywords) {
+			//获取拼音
+			const pinyinList = pinyin(kw, { style: pinyin.STYLE_NORMAL, segment: true, heteronym: true });
+
+			//处理拼音
+			for (const pys of resolvePinyin(pinyinList)) {
+				//基础拼音
+				const basePinyin = pys.join("");
+				if (!items.includes(basePinyin)) items.push(basePinyin);
+				//首字母
+				const simplePinyin = pys.map(p => {
+					if (/^\d+$/.test(p)) return p;
+					return p[0];
+				}).join("");
+				if (!items.includes(simplePinyin)) items.push(simplePinyin);
+			}
+
+			//关键字本身
+			kw = kw.replaceAll(" ", '');
+			if (!items.includes(kw)) items.push(kw);
+		}
+
+		//完成
+		return new this(items.map(s => s.replaceAll("'", "")));
+	}
+}
+
+
+// console.log(TSVector.fromKeyworlds(["yizhi kangkang"]))
--- a/src/types.ts
+++ b/src/types.ts
@ -0,0 +1,62 @@
+import type { BasicEntity } from "./entity";
+
+export type Class<T> = new (...args: any[]) => T;
+
+export type ArrayType<T> = T extends Array<infer U> ? U : never;
+export type ArrayTypeSelf<T> = T extends Array<infer U> ? U : T;
+
+export type Values<T> = T[keyof T];
+
+export namespace Decorators {
+	export type ClassDecorator<T> = (target: Class<T>) => any;
+	export type PropDecorator<T> = (target: T, propertyKey: string) => any;
+	export type MethodDecorator<T> = (target: T, propertyKey: string, descriptor: PropertyDescriptor) => any;
+	export type ParamDecorator<T> = (target: T, propertyKey: string, parameterIndex: number) => any;
+}
+
+
+/** 取基础类型的字段名 */
+export type BasicFieldName<T extends BasicEntity> = Values<{ [P in keyof T]:
+	//忽略never
+	Exclude<T[P], null | undefined> extends never ? never : (
+		//忽略函数
+		Exclude<T[P], null | undefined> extends Function ? never : (
+			//忽略实体
+			ArrayTypeSelf<Exclude<T[P], null | undefined>> extends BasicEntity ? never : (
+				P
+			)
+		)
+	)
+}>;
+
+
+/** 可以用作ID的字段名称 */
+export type IDLikeFieldName<T extends BasicEntity> = Values<{ [P in keyof T]:
+	Exclude<T[P], null | undefined> extends never ? never : (
+		string extends Exclude<T[P], null | undefined> ? P : (
+			number extends Exclude<T[P], null | undefined> ? P : never
+		)
+	)
+}>;
+
+
+/** 获取可用于ManyJoin的字段名 */
+export type ManyJoinFieldName<T extends BasicEntity> = Values<{ [P in keyof T]:
+	//忽略never
+	ArrayType<Exclude<T[P], null | undefined>> extends never ? never : (
+		//只取Array实体
+		ArrayType<Exclude<T[P], null | undefined>> extends BasicEntity ? P : never
+	)
+}>;
+
+/** 获取可以用户OneJoin的字段名 */
+export type OneJoinFieldName<T extends BasicEntity> = Values<{ [P in keyof T]:
+	//忽略never
+	Exclude<T[P], null | undefined> extends never ? never : (
+		//只取Array实体
+		Exclude<T[P], null | undefined> extends BasicEntity ? P : never
+	)
+}>;
+
+/** 可以Join的字段名 */
+export type JoinaFieldName<T extends BasicEntity> = OneJoinFieldName<T> | ManyJoinFieldName<T>;
--- a/src/util.ts
+++ b/src/util.ts
@ -0,0 +1,35 @@
+import { DatabaseError } from "./error";
+
+export function escapeID(...keys: string[]) {
+	return keys.map(key => `"${key}"`).join(".");
+}
+
+export function escapeValue(value: any) {
+	if (typeof value === "number") return value.toString();
+	else if (typeof value === "string") return `E'${(value).replaceAll("'", "\\x27")}'`;
+	else if (typeof value === "boolean") return value.toString();
+	else if (typeof value === "bigint") return value.toString();
+	else if (value === null) return "null";
+	else throw new DatabaseError("DB_QUERY_ESCAPE_VALUE_ERROR", "无法转义的值");
+}
+
+
+export function formatSQL(sql: string, args: any[] | Record<string, any>) {
+	if (args instanceof Array) {
+		const _args = [...args];
+		return sql.replace(/\?/g, () => {
+			const v = _args.shift();
+			if (v === undefined) return "null";
+			else if (v instanceof Array) return v.map(escapeValue).join(",");
+			else return escapeValue(v);
+		});
+	}
+	else {
+		return sql.replace(/\{:(\w+)\}/g, (match, key) => {
+			const v = args[key];
+			if (v === undefined) return "null";
+			else if (v instanceof Array) return v.map(escapeValue).join(",");
+			else return escapeValue(v);
+		});
+	}
+}