import type { Knex } from "knex";
import type InformationSchemaColumn from "../information_schema/InformationSchemaColumn.ts";
import type PgType from "./PgType.ts";
import { CanonicalType } from "./query-parts/canonicaliseTypes.ts";
/**
 * Attribute of a composite type.
 */
export interface CompositeTypeAttribute {
    /**
     * Attribute name.
     */
    name: string;
    /**
     * Type information.
     */
    type: CanonicalType;
    /**
     * Comment on the attribute.
     */
    comment: string | null;
    /**
     * Default value of the attribute.
     */
    defaultValue: any;
    /**
     * Maximum length of the attribute.
     */
    maxLength: number | null;
    /**
     * Whether the attribute is nullable.
     */
    isNullable: boolean;
    /**
     * Behavior of the generated attribute. "ALWAYS" if always generated,
     * "NEVER" if never generated, "BY DEFAULT" if generated when a value
     * is not provided.
     */
    generated: "ALWAYS" | "NEVER" | "BY DEFAULT";
    /**
     * Whether the attribute is updatable.
     */
    isUpdatable: boolean;
    /**
     * Whether the attribute is an identity attribute.
     */
    isIdentity: boolean;
    /**
     * Ordinal position of the attribute in the composite type. Starts from 1.
     */
    ordinalPosition: number;
    /**
     * The Postgres information_schema views do not contain info about materialized views.
     * This value is the result of a query that matches the one for regular views.
     * Use with caution, not all fields are guaranteed to be meaningful and/or accurate.
     */
    fakeInformationSchemaValue: InformationSchemaColumn;
}
/**
 * Composite type in a schema with details.
 */
export interface CompositeTypeDetails extends PgType<"composite"> {
    /**
     * Canonical representation of the composite type
     * with full attribute details.
     */
    canonical: CanonicalType.Composite;
}
declare const extractCompositeType: (db: Knex, composite: PgType<"composite">) => Promise<CompositeTypeDetails>;
export default extractCompositeType;