当我使用子查询设置ID =数字时，我在查询中遇到性能问题，然后在主查询中加入该子查询以查找该ID，此方法大约需要150秒。但是如果我删除子查询并直接在主查询中查找ID =数字，则需要0.5秒。
这里有一些代码例如： 这是150秒的例子 在这里我在With子句中设置了cto_in_codigo。
WITH CONTRATOS AS (
SELECT CTO_IN_CODIGO FROM MGCAR.CAR_CONTRATO
WHERE CTO_IN_CODIGO = 14393
)
SELECT
PT.PAR_IN_CODIGO,
PTC.PARCOR_IN_INDICE
FROM (
SELECT
MAX(PT.HPAR_IN_CODIGO) OVER (PARTITION BY PT.PAR_IN_CODIGO, PT.CTO_IN_CODIGO) HPAR_IN_CODIGO_MAX,
PT.HPAR_IN_CODIGO,
PT.CTO_IN_CODIGO,
PT.PAR_IN_CODIGO
FROM
QUERIE.PARCELA_TOTAL PT
JOIN CONTRATOS CTO
ON CTO.CTO_IN_CODIGO = PT.CTO_IN_CODIGO
WHERE
PT.PAR_DT_REAJUSTE <= TO_DATE('31/12/2017', 'DD/MM/YYYY')
) PT
LEFT OUTER JOIN (
SELECT
MAX(PTC.PARCOR_IN_CODIGO) OVER (PARTITION BY PTC.PAR_IN_CODIGO, PTC.CTO_IN_CODIGO) PARCOR_IN_CODIGO_MAX,
PTC.PARCOR_IN_CODIGO,
PTC.CTO_IN_CODIGO,
PTC.PAR_IN_CODIGO,
PTC.HPAR_IN_CODIGO,
PTC.PARCOR_IN_INDICE
FROM
QUERIE.PARCELA_TOTAL_CORRECAO PTC
JOIN CONTRATOS CTO
ON CTO.CTO_IN_CODIGO = PTC.CTO_IN_CODIGO
) PTC
ON PTC.CTO_IN_CODIGO = PT.CTO_IN_CODIGO
AND PTC.PAR_IN_CODIGO = PT.PAR_IN_CODIGO
AND PTC.HPAR_IN_CODIGO = PT.HPAR_IN_CODIGO
AND PTC.PARCOR_IN_CODIGO = PTC.PARCOR_IN_CODIGO_MAX
WHERE
PT.HPAR_IN_CODIGO = PT.HPAR_IN_CODIGO_MAX
这是0.5秒。 在这里我在每个查询中设置了cto_in_codigo
SELECT
PT.PAR_IN_CODIGO,
PTC.PARCOR_IN_INDICE
FROM (
SELECT
MAX(PT.HPAR_IN_CODIGO) OVER (PARTITION BY PT.PAR_IN_CODIGO, PT.CTO_IN_CODIGO) HPAR_IN_CODIGO_MAX,
PT.HPAR_IN_CODIGO,
PT.CTO_IN_CODIGO,
PT.PAR_IN_CODIGO
FROM
QUERIE.PARCELA_TOTAL PT
WHERE
PT.PAR_DT_REAJUSTE <= TO_DATE('31/12/2017', 'dd/MM/yyyy')
AND PT.CTO_IN_CODIGO = 14393
) PT
LEFT OUTER JOIN (
SELECT
MAX(PTC.PARCOR_IN_CODIGO) OVER (PARTITION BY PTC.PAR_IN_CODIGO, PTC.CTO_IN_CODIGO) PARCOR_IN_CODIGO_MAX,
PTC.PARCOR_IN_CODIGO,
PTC.CTO_IN_CODIGO,
PTC.PAR_IN_CODIGO,
PTC.HPAR_IN_CODIGO,
PTC.PARCOR_IN_INDICE
FROM
QUERIE.PARCELA_TOTAL_CORRECAO PTC
WHERE
PTC.CTO_IN_CODIGO = 14393
) PTC
ON PTC.CTO_IN_CODIGO = PT.CTO_IN_CODIGO
AND PTC.PAR_IN_CODIGO = PT.PAR_IN_CODIGO
AND PTC.HPAR_IN_CODIGO = PT.HPAR_IN_CODIGO
AND PTC.PARCOR_IN_CODIGO = PTC.PARCOR_IN_CODIGO_MAX
WHERE
PT.HPAR_IN_CODIGO = PT.HPAR_IN_CODIGO_MAX
让我感到困惑的是，with子句只返回一行带有cto_in_codigo的数字，就像我在每个查询中的硬编码一样，就像第二个代码一样。什么可能导致这种超级延迟？