Structure

SQLDropIndex

An expression representing a DROP INDEX query. Used to delete indexes from tables.

struct SQLDropIndex

Overview

DROP INDEX IF EXISTS ON `table` CASCADE;

Not all dialects require or allow specifying the owning table of an index when dropping it, while others enforce doing so. There is no dialect functionality enabling a check for this at this time, so users must track for themselves whether or not to specify the table. At the time of this writing, the table must be specified for MySQL and must not be specified for other drivers.

See SQLDropIndexBuilder.

Topics

Initializers

init(name: any SQLExpression)
Create a new index deletion query.

Instance Properties

var behavior: (any SQLExpression)?
A drop behavior.
var ifExists: Bool
If true, requests idempotent behavior (e.g. that no error be raised if the named index does not exist).
var name: any SQLExpression
The name of the index to drop.
var owningObject: (any SQLExpression)?
The object (usually a table) on which the index exists.

Instance Methods

func serialize(to: inout SQLSerializer)
Invoked when a request is made to serialize the expression to raw SQL.

Relationships

Conforms To

SQLExpression
Swift.Sendable
Swift.SendableMetatype

See Also

Query Expressions

struct SQLAlterEnum
An expression representing an ALTER TYPE query. Used to add new cases to enumeration types.
struct SQLAlterTable
An expression representing an ALTER TABLE query. Used to modify the structure of existing tables.
struct SQLCreateEnum
An expression representing a CREATE TYPE query. Used to create enumeration types.
struct SQLCreateIndex
An expression representing a CREATE INDEX query. Used to add indexes over columns to an existing table.
struct SQLCreateTable
An expression representing a CREATE TABLE query. Used to create new tables.
struct SQLCreateTrigger
An expression representing a CREATE TRIGGER query. Used to create new triggers for actions on a table.
struct SQLDelete
An expression representing a CREATE TRIGGER query. Used to remove rows from a table.
struct SQLDropEnum
An expression representing a DROP TYPE query. Used to delete enumeration types.
struct SQLDropTable
An expression representing a DROP TABLE query. Used to delete entire tables.
struct SQLDropTrigger
An expression representing a DROP TRIGGER query. Used to delete triggers.
struct SQLInsert
An expression representing an INSERT query. Used to add new rows to a table.
struct SQLSelect
An expression representing a SELECT query. Used to retrieve rows and expression results from a database.
struct SQLUnion
An expression representing two or more SELECT queries joined by UNION clauses. Used to merge the results of multiple queries into a single result set.
struct SQLUpdate
An expression representing an UPDATE query. Used to modify existing rows in a single table.