0.41.1 causes exception when trying to read byte column from H2

This commit turns even really short byte arrays into streams https://github.com/JetBrains/Exposed/commit/4a97034f0abfca04092e608ad99114e938e503e1

The call to reset on the input stream breaks Exposed with H2 because the InputStream implementation used by H2 doesn’t implement reset. It also seems a bit wasteful to create a stream each time.

Caused by: java.io.IOException: mark/reset not supported
	at java.base/java.io.InputStream.reset(InputStream.java:733)
	at java.base/java.io.FilterInputStream.reset(FilterInputStream.java:224)
	at org.jetbrains.exposed.sql.statements.api.ExposedBlob.getBytes(ExposedBlob.kt:8)

[axle-h]

@kimble, @axle-h could you please share how you work with blob column as I can’t reproduce the problem?

H2 implements “small” & “large” BLOBs differently and this issue affects large BLOBS only. Maybe you have no coverage for large BLOBs?

I have a demo: https://github.com/axle-h/exposed-issue-1633-demo

[kimble]

I’m using H2 version 2.1.214. Seems like H2 is using org.h2.mvstore.StreamStore.Stream that implements InputStream, but doesn’t implement the reset method.

Seems like it is a good idea to avoid calling reset unless markSupported returns true.