Method filter

packages/reltab/src/QueryExp.ts:102–104

(fexp: FilterExp)

  }

  filter(fexp: FilterExp): QueryExp {
    return new QueryExp({ operator: "filter", fexp, from: this._rep });
  }

  mapColumns(cmap: { [colName: string]: ColumnMapInfo }): QueryExp {
    return new QueryExp({ operator: "mapColumns", cmap, from: this._rep });