@sqb/builder/esm/sql-objects/order-column.js

Extensible multi-dialect SQL query builder written with TypeScript

import { SerializationType } from '../enums.js';
import { BaseField } from './base-field.js';
const ORDER_COLUMN_PATTERN = /^([-+])?((?:[a-zA-Z_][\w$]*\.){0,2})([a-zA-Z_][\w$]*|\*) *(asc|dsc|desc|ascending|descending)?$/i;
export class OrderColumn extends BaseField {
    constructor(value) {
        super();
        const m = value.match(ORDER_COLUMN_PATTERN);
        if (!m)
            throw new TypeError(`"${value}" does not match order column format`);
        this._field = m[3];
        if (m[2]) {
            const a = m[2].split(/\./g);
            a.pop();
            this._table = a.pop();
            this._schema = a.pop();
        }
        this._descending = !!(m[1] === '-' ||
            (!m[1] &&
                m[4] &&
                ['dsc', 'desc', 'descending'].includes(m[4].toLowerCase())));
    }
    get _type() {
        return SerializationType.ORDER_COLUMN;
    }
    _serialize(ctx) {
        const o = {
            schema: this._schema,
            table: this._table,
            field: this._field,
            descending: !!this._descending,
            isReservedWord: !!(this._field && ctx.isReservedWord(this._field)),
        };
        return ctx.serialize(this._type, o, () => (o.schema ? o.schema + '.' : '') +
            (o.table ? o.table + '.' : '') +
            (o.isReservedWord ? '"' + o.field + '"' : o.field) +
            (o.descending ? ' desc' : ''));
    }
}