import { TableDescription } from '../../keyword/table/table-description';
import { ForeignKeyConstraint } from '../create-table';
export declare type AlterTableSql = AlterTableAddColumnSql | AlterTableDropColumnSql | AlterTableDropConstraintSql | AlterTableAddPrimaryKeySql | AlterTableAddForeignKeySql<string> | AlterTableAddForeignKeySql<string[]> | AlterTableRenameSql;
export interface AlterTableRenameSql {
    alterTable: TableDescription<any>;
    renameTo: string;
}
export declare const isAlterTableRenameSql: (val: any) => val is AlterTableRenameSql;
export interface AlterTableDropColumnSql {
    alterTable: TableDescription<any>;
    drop: {
        column: string;
    };
}
export declare const isAlterTableDropColumnSql: (val: any) => val is AlterTableDropColumnSql;
export interface AlterTableDropConstraintSql {
    alterTable: TableDescription<any>;
    drop: {
        constraint: string;
    };
}
export declare const isAlterTableDropConstraintSql: (val: any) => val is AlterTableDropConstraintSql;
export interface AlterTableAddColumnSql {
    alterTable: TableDescription<any>;
    add: {
        column: string;
        type: string;
        size?: number;
    };
}
export declare const isAlterTableAddColumnSql: (val: any) => val is AlterTableAddColumnSql;
export interface AlterTableAddForeignKeySql<T> {
    alterTable: TableDescription<any>;
    add: {
        foreignKey: T;
        constraint?: string;
        references: {
            table: TableDescription<any>;
            primaryKeys: T;
        };
        onDelete?: ForeignKeyConstraint;
        onUpdate?: ForeignKeyConstraint;
    };
}
export declare const isAlterTableAddForeignKeySql: (val: any) => val is AlterTableAddForeignKeySql<any>;
export interface AlterTableAddPrimaryKeySql {
    alterTable: TableDescription<any>;
    add: {
        primaryKey: string | string[];
    };
}
export declare const isAlterTableAddPrimaryKeySql: (val: any) => val is AlterTableAddPrimaryKeySql;