Add delayLoadingLobs#1336

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rene-ye merged 12 commits intomicrosoft:devfrom

May 26, 2020

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rene-ye commented May 14, 2020 •

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Adds a property delayLoadingLobs which will cause all LOB objects retrieved from the ResultSet to not be streamed.

The driver does this by setting a boolean on every LOB object when retrieved via a getter. This boolean is then used by the LOB object when users call stream getters.

rene-ye and others added 3 commits

May 11, 2020 08:58


          Add property

13fc69a


          Add resource

e994670


          Fix nullptr

4c1e3ef

rene-ye added the Public API label

rene-ye changed the title ~~Add loadLoargeObjects~~ Add loadLargeObjects

rene-ye added this to the 8.3.1 milestone

rene-ye added 4 commits

May 21, 2020 14:30


          change loadLargeObjects to delayLoadingLobs

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          add tests

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          quick fix

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          Merge branch 'dev' of https://github.com/Microsoft/mssql-jdbc into blob

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# Conflicts:
#	src/main/java/com/microsoft/sqlserver/jdbc/ISQLServerDataSource.java
#	src/main/java/com/microsoft/sqlserver/jdbc/SQLServerConnection.java
#	src/main/java/com/microsoft/sqlserver/jdbc/SQLServerDriver.java

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src/main/java/com/microsoft/sqlserver/jdbc/ISQLServerDataSource.java Outdated

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src/main/java/com/microsoft/sqlserver/jdbc/SQLServerBlob.java Outdated

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src/main/java/com/microsoft/sqlserver/jdbc/SQLServerResource.java Outdated

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src/test/java/com/microsoft/sqlserver/jdbc/unit/lobs/LobsTest.java

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src/test/java/com/microsoft/sqlserver/jdbc/unit/lobs/LobsTest.java

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src/test/java/com/microsoft/sqlserver/jdbc/unit/lobs/LobsTest.java

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src/test/java/com/microsoft/sqlserver/jdbc/unit/lobs/LobsTest.java

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src/main/java/com/microsoft/sqlserver/jdbc/SQLServerBlob.java Outdated

TarasTielkes commented May 22, 2020

(I'm adding this comment as a user that follows the project, but does not actively participate - if this is not the right place for this comment, please let me know)

It would be good to document the intent of this API. Why would I, as a user of the driver, want to set the loadLargeObjects property? What are the benefits, and what are the downsides? Interacting with large volumes of large BLOBs is a tricky area in my experience, so a clear description of what this API intends to facilitate would be a good idea, methinks.

I do agree with the comments from @peterbae regarding the naming, FWIW.

rene-ye changed the title ~~Add loadLargeObjects~~ Add delayLoadingLobs


          address comments

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src/main/java/com/microsoft/sqlserver/jdbc/SQLServerLob.java

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src/main/java/com/microsoft/sqlserver/jdbc/SQLServerResource.java Outdated

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src/test/java/com/microsoft/sqlserver/jdbc/unit/lobs/LobsTest.java


          format

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src/main/java/com/microsoft/sqlserver/jdbc/SQLServerBlob.java

rene-ye added 2 commits

May 26, 2020 09:45


          small test fix

89a6a48


          Merge branch 'blob' of https://github.com/rene-ye/mssql-jdbc into blob

f79f76d

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May 26, 2020 16:46

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ulvii left a comment

There are conflicts in the PR.


          Merge branch 'dev' of https://github.com/Microsoft/mssql-jdbc into blob

4f856a2

# Conflicts:
#	src/main/java/com/microsoft/sqlserver/jdbc/SQLServerResource.java

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May 26, 2020 17:57

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rene-ye merged commit 54c6748 into microsoft:dev

Contributor

ulvii commented May 27, 2020

Hi @TarasTielkes ,
Thanks for the suggestions. We will definitely document the property on MSDN once it is in production release. To give you a brief idea about it, as of 7.0.0 version of the driver, we introduced some changes to the way the driver handles LOB streaming and the new property is meant to provide backward compatibility with 6.4.0 version of the driver for some edge cases.

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