右/左外加入来自()和许多'和'在JOOQ中有四个表

时间:2017-08-10 09:49:44

标签: java sql oracle jooq

我是JOOQ的菜鸟,需要帮助才能将SQL翻译成JOOQ。 所以我在这里有一个很长的SQL语句:

请参阅此图片以获得更好的洞察力:Outer Join

enter image description here

SELECT SUM(DECODE(VVS.VVS_ZWS_ID, 47, DECK.DEC_BRUTTOPRAEMIE_100,               DECK.DEC_BRUTTOPRAEMIE_FOLGE))
            FROM deck, agd, vvs, agv
            WHERE vvs.vvs_ver_nummer = verNummer
            AND vvs.vvs_nummer = vvsNummer 
            AND agv.agv_code = vvs.vvs_agv_code
            AND deck.dec_ver_nummer = vvs.vvs_ver_nummer
            AND deck.dec_vvs_nummer = vvs.vvs_nummer
            AND deck.dec_tbl_code = 'KH'
            AND agd.agd_code(+) = deck.dec_agd_code
            AND (    NVL(agv.agv_aenderungstyp, 'NULL') IN ('4', '5')
            OR NVL(agd.agd_aenderungstyp, 'NULL') NOT IN ('4', '5');

我用这个翻译了SQL语句:

create.select(sum(decode().when(vvs.VVS_ZWS_ID.eq(47),deck.DEC_BRUTTOPRAEMIE_100)
                                    .otherwise(deck.DEC_BRUTTOPRAEMIE_FOLGE)))
            .from(deck, vvs, agv)
            .rightOuterJoin(agd)
            .on(agd.AGD_CODE.eq(deck.DEC_AGD_CODE))
            .where(vvs.VVS_VER_NUMMER.eq(verNummer))
            .and(vvs.VVS_NUMMER.eq(vvsNummer))
            .and(agv.AGV_CODE.eq(vvs.VVS_AGV_CODE))
            .and(deck.DEC_VER_NUMMER.eq(vvs.VVS_VER_NUMMER))
            .and(deck.DEC_VVS_NUMMER.eq(vvs.VVS_NUMMER))
            .and(deck.DEC_TBL_CODE.eq("KH"))
            .and(nvl(agv.AGV_AENDERUNGSTYP, "NULL")
              .in("4", "5")
              .or(nvl(agd.AGD_AENDERUNGSTYP, "NULL")
              .notIn("4", "5")))
            .fetch();

我的问题是: 1.在SQL语句from中,我有四个表,分别是deckagdvvsagvagd表必须与deck上的agd.agd_code(+) = deck.dec_agd_code表结合使用。我是否正确翻译了sql?
2.我应该如何处理vvsagv,因为这些表位于agd的{​​{1}}之后?

我花了两天时间考虑这个问题而且我无法解决这个问题。

谢谢!

1 个答案:

答案 0 :(得分:1)

原始查询的1:1翻译

虽然我通常不建议使用弃用的Oracle样式的外连接语法,但请注意jOOQ确实通过Field.plus()支持它,所以你可以写:

<强> SQL

AND agd.agd_code(+) = deck.dec_agd_code

<强> jOOQ

.and(agd.AGD_CODE.plus().eq(deck.DEC_AGD_CODE))

不要将表列表与ANSI连接

混合使用

除此之外,问题解释起来更简单。您将“经典”表列表(FROM子句中的几个表)与ANSI连接混合在一起,这总是令人困惑。使用jOOQ执行此操作时,jOOQ会将ANSI连接表达式附加到表列表的最后一个表中。在您的情况下,这导致了以下FROM子句:

-- Parentheses added for illustration purposes
FROM deck, vvs, (agv RIGHT OUTER JOIN agd ON agd.AGD_CODE = deck.DEC_AGD_CODE)

在这种情况下,您可能需要LEFT OUTER JOIN,如果您的查询可能正确。

但它仍然会令人困惑,所以无论如何,我强烈建议您先将查询迁移到所有ANSI连接:

<强> SQL

SELECT SUM(DECODE(VVS.VVS_ZWS_ID, 
              47, DECK.DEC_BRUTTOPRAEMIE_100, 
              DECK.DEC_BRUTTOPRAEMIE_FOLGE))
FROM deck
JOIN vvs
  ON deck.dec_ver_nummer = vvs.vvs_ver_nummer
  AND deck.dec_vvs_nummer = vvs.vvs_nummer
JOIN agv
  ON agv.agv_code = vvs.vvs_agv_code
LEFT JOIN agd
  ON deck.dec_agd_code = agd.agd_code
WHERE vvs.vvs_ver_nummer = verNummer
  AND vvs.vvs_nummer = vvsNummer 
  AND deck.dec_tbl_code = 'KH'
  AND (    NVL(agv.agv_aenderungstyp, 'NULL') IN ('4', '5')
    OR NVL(agd.agd_aenderungstyp, 'NULL') NOT IN ('4', '5'));

<强> jOOQ

create.select(sum(decode().when(vvs.VVS_ZWS_ID.eq(47),deck.DEC_BRUTTOPRAEMIE_100)
                                    .otherwise(deck.DEC_BRUTTOPRAEMIE_FOLGE)))
      .from(deck)
      .join(vvs)
        .on(deck.DEC_VER_NUMMER.eq(vvs.VVS_VER_NUMMER))
        .and(deck.DEC_VVS_NUMMER.eq(vvs.VVS_NUMMER))
      .join(agv)
        .on(agv.AGV_CODE.eq(vvs.VVS_AGV_CODE))
      .leftOuterJoin(agd)
        .on(agd.AGD_CODE.eq(deck.DEC_AGD_CODE))
      .where(vvs.VVS_VER_NUMMER.eq(verNummer))
      .and(vvs.VVS_NUMMER.eq(vvsNummer))
      .and(deck.DEC_TBL_CODE.eq("KH"))
      .and(nvl(agv.AGV_AENDERUNGSTYP, "NULL")
        .in("4", "5")
        .or(nvl(agd.AGD_AENDERUNGSTYP, "NULL")
        .notIn("4", "5")))
      .fetch();