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https://issues.apache.org/jira/browse/TRAFODION-2740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16176008#comment-16176008
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ASF GitHub Bot commented on TRAFODION-2740:
-------------------------------------------
Github user xwq commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/1240#discussion_r140421411
--- Diff:
core/conn/jdbcT4/src/main/java/org/trafodion/jdbc/t4/TrafT4Lob.java ---
@@ -91,23 +92,49 @@ public void read() throws SQLException {
}
T4Connection t4connection =
this.connection_.getServerHandle().getT4Connection();
- LogicalByteArray wbuffer =
ExtractLobMessage.marshal(ExtractLobMessage.LOB_EXTRACT_BUFFER, lobHandle_, 1,
0,
+ LogicalByteArray wbuffer =
ExtractLobMessage.marshal(ExtractLobMessage.LOB_EXTRACT_LEN, lobHandle_, 1, 0,
connection_.ic_);
LogicalByteArray rbuffer =
t4connection.getReadBuffer(TRANSPORT.SRVR_API_EXTRACTLOB, wbuffer);
ExtractLobReply reply = new ExtractLobReply(rbuffer,
connection_.ic_);
- data_ = reply.lobDataValue;
+ length = reply.lobLength;
--- End diff --
I have talked it with Selva. I think the logic is a little complex to
support some APIs like setBytes(). I will add write down the design to discuss
with you about the next phase.
> JDBC Extract LOB in chunks
> --------------------------
>
> Key: TRAFODION-2740
> URL: https://issues.apache.org/jira/browse/TRAFODION-2740
> Project: Apache Trafodion
> Issue Type: Bug
> Components: client-jdbc-t4, connectivity-mxosrvr
> Affects Versions: 2.2-incubating
> Reporter: Weiqing Xu
> Assignee: Weiqing Xu
>
> The JDBC will extract all the LOB context once.However there is a size limit
> for the extract query. It only can extract at most 500MB. So the the
> *_"extract"_* statement should be call multiple times to extract the whole
> context.
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