将条件放在 JOIN ON 或过滤条件中的好处

Question

在带有 JOIN 的 Siddhi 查询中，将条件条件放在 ON 子句或过滤条件中更好。

JOIN ON 子句中的条件

FROM Stroke_TPA_Ingest_Ras_eMar_Output_Stream as Tpa
JOIN PreAdmitADTTable as Adt
  ON str:concat(Tpa.FacilityMnemonic,"-",Tpa.AccountNumber) == str:concat(Adt.FacilityMnemonic,"-",Adt.AccountNumber)
  AND (
        (
          (str:contains(Tpa.TpaPharmacyCodesValueSet, "https://fhir.app.medcity.net/ValueSet/StrokeTpaPharmacyCodes|"))
          AND 
          (convert(Tpa.AdministrationDosageFormId, 'int') > 40 AND convert(Tpa.AdministrationDosageFormId, 'int') <= 90)
        )
        OR 
        (
          (str:contains(Tpa.TpaPharmacyCodesValueSet, "https://fhir.app.medcity.net/ValueSet/StrokeTpaBolusPharmacyCodes|"))
          AND 
          (convert(Tpa.AdministrationDosageFormId, 'int') > 0 AND convert(Tpa.AdministrationDosageFormId, 'int') <= 9)
        )
      )
SELECT  Tpa.meta_LinkId  as meta_LinkId
INSERT INTO AlertStreamIntermediary;

过滤器中的条件

FROM Stroke_TPA_Ingest_Ras_eMar_Output_Stream[
      ((str:contains(Tpa.TpaPharmacyCodesValueSet, "https://fhir.app.medcity.net/ValueSet/StrokeTpaPharmacyCodes|"))
      AND 
      (convert(Tpa.AdministrationDosageFormId, 'int') > 40 AND convert(Tpa.AdministrationDosageFormId, 'int') <= 90))
    OR  
      ((str:contains(Tpa.TpaPharmacyCodesValueSet, "https://fhir.app.medcity.net/ValueSet/StrokeTpaBolusPharmacyCodes|"))
      AND
      (convert(Tpa.AdministrationDosageFormId, 'int') > 0 AND convert(Tpa.AdministrationDosageFormId, 'int') <= 9))
  ] as Tpa
JOIN PreAdmitADTTable as Adt
  ON str:concat(Tpa.FacilityMnemonic,"-",Tpa.AccountNumber) == str:concat(Adt.FacilityMnemonic,"-",Adt.AccountNumber)
SELECT  Tpa.meta_LinkId  as meta_LinkId
INSERT INTO AlertStreamIntermediary;

这两个查询似乎是等价的，但想知道是否存在性能差异

Answer 1

第二个查询会执行得更好，因为当事件到达连接查询时，我们已经使用过滤器查询消除了不需要的事件。由于 Siddhi 作为管道，与过滤器不匹配的事件将在该层被丢弃。有关 Siddhi 架构的更多信息，您可以参考 this.

将条件放在 JOIN ON 或过滤条件中的好处

benefit to putting conditional in JOIN ON or Filter criteria

wso2

siddhi