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Ammaar Reshi
256
node_modules/drizzle-orm/mysql-core/db.js
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256
node_modules/drizzle-orm/mysql-core/db.js
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import { entityKind } from "../entity.js";
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import { SelectionProxyHandler } from "../selection-proxy.js";
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import { sql } from "../sql/sql.js";
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import { WithSubquery } from "../subquery.js";
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import { MySqlCountBuilder } from "./query-builders/count.js";
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import {
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MySqlDeleteBase,
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MySqlInsertBuilder,
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MySqlSelectBuilder,
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MySqlUpdateBuilder,
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QueryBuilder
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} from "./query-builders/index.js";
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import { RelationalQueryBuilder } from "./query-builders/query.js";
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class MySqlDatabase {
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constructor(dialect, session, schema, mode) {
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this.dialect = dialect;
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this.session = session;
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this.mode = mode;
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this._ = schema ? {
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schema: schema.schema,
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fullSchema: schema.fullSchema,
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tableNamesMap: schema.tableNamesMap
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} : {
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schema: void 0,
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fullSchema: {},
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tableNamesMap: {}
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};
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this.query = {};
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if (this._.schema) {
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for (const [tableName, columns] of Object.entries(this._.schema)) {
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this.query[tableName] = new RelationalQueryBuilder(
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schema.fullSchema,
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this._.schema,
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this._.tableNamesMap,
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schema.fullSchema[tableName],
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columns,
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dialect,
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session,
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this.mode
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);
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}
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}
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}
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static [entityKind] = "MySqlDatabase";
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query;
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/**
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* Creates a subquery that defines a temporary named result set as a CTE.
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*
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* It is useful for breaking down complex queries into simpler parts and for reusing the result set in subsequent parts of the query.
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*
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* See docs: {@link https://orm.drizzle.team/docs/select#with-clause}
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*
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* @param alias The alias for the subquery.
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*
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* Failure to provide an alias will result in a DrizzleTypeError, preventing the subquery from being referenced in other queries.
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*
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* @example
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*
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* ```ts
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* // Create a subquery with alias 'sq' and use it in the select query
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* const sq = db.$with('sq').as(db.select().from(users).where(eq(users.id, 42)));
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*
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* const result = await db.with(sq).select().from(sq);
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* ```
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*
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* To select arbitrary SQL values as fields in a CTE and reference them in other CTEs or in the main query, you need to add aliases to them:
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*
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* ```ts
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* // Select an arbitrary SQL value as a field in a CTE and reference it in the main query
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* const sq = db.$with('sq').as(db.select({
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* name: sql<string>`upper(${users.name})`.as('name'),
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* })
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* .from(users));
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*
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* const result = await db.with(sq).select({ name: sq.name }).from(sq);
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* ```
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*/
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$with(alias) {
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const self = this;
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return {
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as(qb) {
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if (typeof qb === "function") {
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qb = qb(new QueryBuilder(self.dialect));
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}
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return new Proxy(
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new WithSubquery(qb.getSQL(), qb.getSelectedFields(), alias, true),
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new SelectionProxyHandler({ alias, sqlAliasedBehavior: "alias", sqlBehavior: "error" })
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);
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}
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};
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}
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$count(source, filters) {
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return new MySqlCountBuilder({ source, filters, session: this.session });
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}
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/**
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* Incorporates a previously defined CTE (using `$with`) into the main query.
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*
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* This method allows the main query to reference a temporary named result set.
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*
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* See docs: {@link https://orm.drizzle.team/docs/select#with-clause}
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*
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* @param queries The CTEs to incorporate into the main query.
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*
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* @example
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*
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* ```ts
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* // Define a subquery 'sq' as a CTE using $with
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* const sq = db.$with('sq').as(db.select().from(users).where(eq(users.id, 42)));
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*
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* // Incorporate the CTE 'sq' into the main query and select from it
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* const result = await db.with(sq).select().from(sq);
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* ```
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*/
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with(...queries) {
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const self = this;
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function select(fields) {
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return new MySqlSelectBuilder({
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fields: fields ?? void 0,
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session: self.session,
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dialect: self.dialect,
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withList: queries
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});
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}
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function selectDistinct(fields) {
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return new MySqlSelectBuilder({
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fields: fields ?? void 0,
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session: self.session,
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dialect: self.dialect,
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withList: queries,
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distinct: true
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});
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}
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function update(table) {
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return new MySqlUpdateBuilder(table, self.session, self.dialect, queries);
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}
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function delete_(table) {
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return new MySqlDeleteBase(table, self.session, self.dialect, queries);
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}
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return { select, selectDistinct, update, delete: delete_ };
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}
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select(fields) {
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return new MySqlSelectBuilder({ fields: fields ?? void 0, session: this.session, dialect: this.dialect });
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}
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selectDistinct(fields) {
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return new MySqlSelectBuilder({
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fields: fields ?? void 0,
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session: this.session,
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dialect: this.dialect,
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distinct: true
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});
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}
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/**
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* Creates an update query.
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*
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* Calling this method without `.where()` clause will update all rows in a table. The `.where()` clause specifies which rows should be updated.
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*
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* Use `.set()` method to specify which values to update.
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*
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* See docs: {@link https://orm.drizzle.team/docs/update}
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*
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* @param table The table to update.
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*
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* @example
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*
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* ```ts
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* // Update all rows in the 'cars' table
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* await db.update(cars).set({ color: 'red' });
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*
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* // Update rows with filters and conditions
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* await db.update(cars).set({ color: 'red' }).where(eq(cars.brand, 'BMW'));
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* ```
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*/
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update(table) {
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return new MySqlUpdateBuilder(table, this.session, this.dialect);
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}
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/**
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* Creates an insert query.
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*
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* Calling this method will create new rows in a table. Use `.values()` method to specify which values to insert.
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*
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* See docs: {@link https://orm.drizzle.team/docs/insert}
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*
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* @param table The table to insert into.
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*
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* @example
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*
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* ```ts
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* // Insert one row
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* await db.insert(cars).values({ brand: 'BMW' });
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*
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* // Insert multiple rows
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* await db.insert(cars).values([{ brand: 'BMW' }, { brand: 'Porsche' }]);
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* ```
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*/
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insert(table) {
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return new MySqlInsertBuilder(table, this.session, this.dialect);
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}
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/**
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* Creates a delete query.
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*
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* Calling this method without `.where()` clause will delete all rows in a table. The `.where()` clause specifies which rows should be deleted.
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*
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* See docs: {@link https://orm.drizzle.team/docs/delete}
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*
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* @param table The table to delete from.
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*
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* @example
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*
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* ```ts
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* // Delete all rows in the 'cars' table
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* await db.delete(cars);
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*
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* // Delete rows with filters and conditions
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* await db.delete(cars).where(eq(cars.color, 'green'));
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* ```
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*/
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delete(table) {
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return new MySqlDeleteBase(table, this.session, this.dialect);
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}
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execute(query) {
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return this.session.execute(typeof query === "string" ? sql.raw(query) : query.getSQL());
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}
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transaction(transaction, config) {
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return this.session.transaction(transaction, config);
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}
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}
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const withReplicas = (primary, replicas, getReplica = () => replicas[Math.floor(Math.random() * replicas.length)]) => {
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const select = (...args) => getReplica(replicas).select(...args);
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const selectDistinct = (...args) => getReplica(replicas).selectDistinct(...args);
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const $with = (...args) => getReplica(replicas).with(...args);
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const update = (...args) => primary.update(...args);
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const insert = (...args) => primary.insert(...args);
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const $delete = (...args) => primary.delete(...args);
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const execute = (...args) => primary.execute(...args);
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const transaction = (...args) => primary.transaction(...args);
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return {
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...primary,
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update,
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insert,
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delete: $delete,
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execute,
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transaction,
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$primary: primary,
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select,
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selectDistinct,
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with: $with,
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get query() {
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return getReplica(replicas).query;
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}
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};
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};
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export {
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MySqlDatabase,
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withReplicas
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};
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//# sourceMappingURL=db.js.map
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