219 lines
7.0 KiB
TypeScript
219 lines
7.0 KiB
TypeScript
import type { QueryResult } from '../driver/database-connection.js';
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import type { RawNode } from '../operation-node/raw-node.js';
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import type { CompiledQuery } from '../query-compiler/compiled-query.js';
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import type { KyselyPlugin } from '../plugin/kysely-plugin.js';
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import type { QueryExecutorProvider } from '../query-executor/query-executor-provider.js';
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import type { QueryId } from '../util/query-id.js';
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import type { AliasableExpression, AliasedExpression, Expression } from '../expression/expression.js';
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/**
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* An instance of this class can be used to create raw SQL snippets or queries.
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*
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* You shouldn't need to create `RawBuilder` instances directly. Instead you should
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* use the {@link sql} template tag.
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*/
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export interface RawBuilder<O> extends AliasableExpression<O> {
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get isRawBuilder(): true;
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/**
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* Returns an aliased version of the SQL expression.
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*
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* In addition to slapping `as "the_alias"` to the end of the SQL,
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* this method also provides strict typing:
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*
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* ```ts
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* import { sql } from 'kysely'
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*
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* const result = await db
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* .selectFrom('person')
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* .select(
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* sql<string>`concat(first_name, ' ', last_name)`.as('full_name')
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* )
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* .executeTakeFirstOrThrow()
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*
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* // `full_name: string` field exists in the result type.
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* console.log(result.full_name)
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* ```
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*
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* The generated SQL (PostgreSQL):
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*
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* ```sql
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* select concat(first_name, ' ', last_name) as "full_name"
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* from "person"
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* ```
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*
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* You can also pass in a raw SQL snippet but in that case you must
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* provide the alias as the only type argument:
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*
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* ```ts
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* import { sql } from 'kysely'
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*
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* const values = sql<{ a: number, b: string }>`(values (1, 'foo'))`
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*
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* // The alias is `t(a, b)` which specifies the column names
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* // in addition to the table name. We must tell kysely that
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* // columns of the table can be referenced through `t`
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* // by providing an explicit type argument.
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* const aliasedValues = values.as<'t'>(sql`t(a, b)`)
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*
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* await db
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* .insertInto('person')
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* .columns(['first_name', 'last_name'])
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* .expression(
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* db.selectFrom(aliasedValues).select(['t.a', 't.b'])
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* )
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* .execute()
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* ```
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*
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* The generated SQL (PostgreSQL):
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*
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* ```sql
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* insert into "person" ("first_name", "last_name")
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* from (values (1, 'foo')) as t(a, b)
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* select "t"."a", "t"."b"
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* ```
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*/
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as<A extends string>(alias: A): AliasedRawBuilder<O, A>;
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/**
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* Returns an aliased version of the expression.
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*
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* ### Examples
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*
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* In addition to slapping `as "the_alias"` at the end of the expression,
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* this method also provides strict typing:
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*
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* ```ts
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* const result = await db
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* .selectFrom('person')
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* .select((eb) =>
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* // `eb.fn<string>` returns an AliasableExpression<string>
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* eb.fn<string>('concat', ['first_name', eb.val(' '), 'last_name']).as('full_name')
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* )
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* .executeTakeFirstOrThrow()
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*
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* // `full_name: string` field exists in the result type.
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* console.log(result.full_name)
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* ```
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*
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* The generated SQL (PostgreSQL):
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*
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* ```sql
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* select
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* concat("first_name", $1, "last_name") as "full_name"
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* from
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* "person"
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* ```
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*
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* You can also pass in a raw SQL snippet (or any expression) but in that case you must
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* provide the alias as the only type argument:
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*
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* ```ts
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* import { sql } from 'kysely'
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*
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* const values = sql<{ a: number, b: string }>`(values (1, 'foo'))`
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*
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* // The alias is `t(a, b)` which specifies the column names
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* // in addition to the table name. We must tell kysely that
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* // columns of the table can be referenced through `t`
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* // by providing an explicit type argument.
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* const aliasedValues = values.as<'t'>(sql`t(a, b)`)
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*
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* await db
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* .insertInto('person')
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* .columns(['first_name', 'last_name'])
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* .expression(
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* db.selectFrom(aliasedValues).select(['t.a', 't.b'])
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* )
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* .execute()
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* ```
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*
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* The generated SQL (PostgreSQL):
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*
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* ```sql
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* insert into "person" ("first_name", "last_name")
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* from (values (1, 'foo')) as t(a, b)
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* select "t"."a", "t"."b"
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* ```
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*/
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as<A extends string>(alias: Expression<any>): AliasedRawBuilder<O, A>;
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/**
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* Change the output type of the raw expression.
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*
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* This method call doesn't change the SQL in any way. This methods simply
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* returns a copy of this `RawBuilder` with a new output type.
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*/
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$castTo<C>(): RawBuilder<C>;
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/**
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* Omit null from the expression's type.
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*
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* This function can be useful in cases where you know an expression can't be
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* null, but Kysely is unable to infer it.
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*
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* This method call doesn't change the SQL in any way. This methods simply
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* returns a copy of `this` with a new output type.
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*/
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$notNull(): RawBuilder<Exclude<O, null>>;
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/**
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* Adds a plugin for this SQL snippet.
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*/
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withPlugin(plugin: KyselyPlugin): RawBuilder<O>;
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/**
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* Compiles the builder to a `CompiledQuery`.
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*
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* ### Examples
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*
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* ```ts
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* import { sql } from 'kysely'
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*
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* const compiledQuery = sql`select * from ${sql.table('person')}`.compile(db)
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* console.log(compiledQuery.sql)
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* ```
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*/
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compile(executorProvider: QueryExecutorProvider): CompiledQuery<O>;
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/**
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* Executes the raw query.
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*
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* ### Examples
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*
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* ```ts
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* import { sql } from 'kysely'
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*
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* const result = await sql`select * from ${sql.table('person')}`.execute(db)
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* ```
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*/
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execute(executorProvider: QueryExecutorProvider): Promise<QueryResult<O>>;
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/**
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* Creates the OperationNode that describes how to compile this expression into SQL.
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*
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* ### Examples
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*
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* If you are creating a custom expression, it's often easiest to use the {@link sql}
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* template tag to build the node:
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*
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* ```ts
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* import { type Expression, type OperationNode, sql } from 'kysely'
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*
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* class SomeExpression<T> implements Expression<T> {
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* get expressionType(): T | undefined {
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* return undefined
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* }
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*
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* toOperationNode(): OperationNode {
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* return sql`some sql here`.toOperationNode()
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* }
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* }
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* ```
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*/
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toOperationNode(): RawNode;
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}
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export interface RawBuilderProps {
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readonly queryId: QueryId;
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readonly rawNode: RawNode;
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readonly plugins?: ReadonlyArray<KyselyPlugin>;
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}
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export declare function createRawBuilder<O>(props: RawBuilderProps): RawBuilder<O>;
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/**
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* {@link RawBuilder} with an alias. The result of calling {@link RawBuilder.as}.
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*/
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export interface AliasedRawBuilder<O = unknown, A extends string = never> extends AliasedExpression<O, A> {
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get rawBuilder(): RawBuilder<O>;
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}
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