java - JOOQ selectQuery for Record5

Question

我是 JOOQ 的新手。

我需要使用 SelectQuery 并返回结果，但它的返回类型是记录。是否可以将 selectQuery 与 Record5 一起使用？或者有其他解决方案吗？

    SelectQuery<Record> query = db.selectQuery();
    query.addSelect(WARE.NAME, RECEIPTITEM.SALEPRICE, RECEIPTITEM.QUANTITY, RECEIPT.TSCCREATED, WARE.WARECATEGORYID);
    query.addFrom(RECEIPT
            .join(RECEIPTITEM).on(RECEIPT.ID.eq(RECEIPTITEM.RECEIPTID))
            .join(OUTLET).on(OUTLET.ID.eq(RECEIPT.OUTLETID))
            .join(WARE).on(WARE.ID.eq(RECEIPTITEM.WAREID)));
    query.addConditions(RECEIPT.TSCCREATED.between(start, end)
            .and(OUTLET.OWNERID.eq(ownerId)));
    if (outletId != null) {
        query.addConditions(RECEIPT.OUTLETID.eq(outletId));
    }
    if (merchantId != null) {
        query.addConditions(RECEIPT.MERCHID.eq(merchantId));
    }

Answer 1

您不能创建 SelectQuery<Record5<...>>用 jOOQ 打字。

这是因为 SelectQuery ( which is part of the model API ) 允许您通过 SelectQuery.addSelect() 继续向其中添加新列(你自己做过)。每个这样的调用都会使 Record5<...> 无效类型。

但是，如果动态部分只是附加条件，则不必使用模型 API 来构造动态 SQL。您可以像这样重写您的查询:

Condition condition = RECEIPT.TSCCREATED.between(start, end)
    .and(OUTLET.OWNERID.eq(ownerId));

if (outletId != null) {
    condition = condition.and(RECEIPT.OUTLETID.eq(outletId));
}
if (merchantId != null) {
    condition = condition.and(RECEIPT.MERCHID.eq(merchantId));
}

Select<Record5<String, BigDecimal, Integer, Timestamp, Long>> select =
db.select(
       WARE.NAME, 
       RECEIPTITEM.SALEPRICE, 
       RECEIPTITEM.QUANTITY, 
       RECEIPT.TSCCREATED, 
       WARE.WARECATEGORYID)
  .from(RECEIPT
      .join(RECEIPTITEM).on(RECEIPT.ID.eq(RECEIPTITEM.RECEIPTID))
      .join(OUTLET).on(OUTLET.ID.eq(RECEIPT.OUTLETID))
      .join(WARE).on(WARE.ID.eq(RECEIPTITEM.WAREID)))
  .where(condition);