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During data transfer, indexes are created on the following tables.
Columns that are indexed during data transfer
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Table |
Columns on which indexes are created |
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PERSON |
PATIENT_ID |
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DRUG_ERA |
PATIENT_ID DRUG_ERA_START_DATE DRUG_CONCEPT_ID |
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DRUG_EXPOSURE |
PATIENT_ID DRUG_EXPOSURE_START_DATE DRUG_CONCEPT_ID |
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CONDITION_ERA |
PATIENT_ID CONDITION_ERA_START_DATE CONDITION_CONCEPT_ID |
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CONDITION_OCCURRENCE |
PATIENT_ID CONDITION_START_DATE CONDITION_CONCEPT_ID |
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PROCEDURE_OCCURRENCE |
PATIENT_ID PROCEDURE_DATE PROCEDURE_CONCEPT_ID |
The transformation process creates additional single-column indexes, one for each configuration variable, based on a column that exists in the base tables.
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