17주차 [JPA와 Querydsl] querydsl bulk연산#109
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ChaerinYu wants to merge 1 commit intono-study-no-future:ChaerinYufrom
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17주차 [JPA와 Querydsl] querydsl bulk연산#109ChaerinYu wants to merge 1 commit intono-study-no-future:ChaerinYufrom
ChaerinYu wants to merge 1 commit intono-study-no-future:ChaerinYufrom
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ChaerinYu
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May 16, 2022
JPA와Querydsl/bulk_in_querydsl.md
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when do we call entity manager flush and refresh methods.
In brief - the flush call will issue SQL queries to update the database with the changes that have been done to the in memory entities.
The refresh on the other hand pulls the entity state from the database and overwrites the in memory changes.
google에 Entitymanager refresh vs flush를 검색하면 나오는 정보입니다.
flush를 호출할 경우 메모리에 있는 entity 값들도 바꾸고 DB에도 UPDATE를 날려주는 SQL 쿼리를 호출하고
refresh를 호출할 경우 entity state를 DB에서 가져오고(pull) 메모리에 overwrites해준다고 합니다. 🙂
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