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https://issues.apache.org/jira/browse/TRAFODION-2137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15404927#comment-15404927
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ASF GitHub Bot commented on TRAFODION-2137:
-------------------------------------------
Github user anoopsharma00 commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/634#discussion_r73250622
--- Diff: core/sql/arkcmp/CmpStoredProc.cpp ---
@@ -363,7 +361,7 @@ NABoolean
CmpSPOutputFormat::getColumnDesc(SP_FIELDDESC_STRUCT* fDesc,
{
// convert ElemDDLColViewDef into CatColumn, then column_desc
if ( !ElemDDLColDef2ColumnDescStruct
- (elemDDL, tableDesc_->body.table_desc.tablename, colsDesc) )
+ (elemDDL, tableDesc_->tableDesc()->tablename, colsDesc) )
--- End diff --
For this checkin, wanted to keep the code structure somewhat similar to how
it was.
That made it easier to make changes (lots of search and replace).
The old code used desc_struct which was replaced by TrafDesc class in the
new code.
For a later checkin, we can change to using the underlying class instead of
base class.
> Improve metadata access time during query compilation
> -----------------------------------------------------
>
> Key: TRAFODION-2137
> URL: https://issues.apache.org/jira/browse/TRAFODION-2137
> Project: Apache Trafodion
> Issue Type: Improvement
> Reporter: Anoop Sharma
> Assignee: Anoop Sharma
>
> When a trafodion object is accessed for the first time in a session,
> information about it is read from metadata.
> Multiple metadata tables are read to retrieve information about the
> objects being used in the query.
> Once metadata info is read about a table, it is cached in compiler memory.
> Another query accessing the same object gets it from compiler metadata
> cache.
> This results in the first query compile performance to be slower than the
> subsequent queries accessing the same objects.
> This JIRA is to improve performance of first access of an object in
> a query.
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