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https://issues.apache.org/jira/browse/HIVE-7730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaomeng Huang updated HIVE-7730:
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Attachment: (was: HIVE-7730.002.patch)
> Extend ReadEntity to add accessed columns from query
> ----------------------------------------------------
>
> Key: HIVE-7730
> URL: https://issues.apache.org/jira/browse/HIVE-7730
> Project: Hive
> Issue Type: Bug
> Reporter: Xiaomeng Huang
> Attachments: HIVE-7730.001.patch
>
>
> -Now what we get from HiveSemanticAnalyzerHookContextImpl is limited. If we
> have hook of HiveSemanticAnalyzerHook, we may want to get more things from
> hookContext. (e.g. the needed colums from query).-
> -So we should get instance of HiveSemanticAnalyzerHookContext from
> configuration, extends HiveSemanticAnalyzerHookContext with a new
> implementation, overide the HiveSemanticAnalyzerHookContext.update() and put
> what you want to the class.-
> Hive should store accessed columns to ReadEntity when we set
> HIVE_STATS_COLLECT_SCANCOLS(or we can add a confVar) is true.
> Then external authorization model can get accessed columns when do
> authorization in compile before execute. Maybe we will remove
> columnAccessInfo from BaseSemanticAnalyzer, old authorization and
> AuthorizationModeV2 can get accessed columns from ReadEntity too.
> Here is the quick implement in SemanticAnalyzer.analyzeInternal() below:
> {code} boolean isColumnInfoNeedForAuth =
> SessionState.get().isAuthorizationModeV2()
> && HiveConf.getBoolVar(conf,
> HiveConf.ConfVars.HIVE_AUTHORIZATION_ENABLED);
> if (isColumnInfoNeedForAuth
> || HiveConf.getBoolVar(this.conf,
> HiveConf.ConfVars.HIVE_STATS_COLLECT_SCANCOLS) == true) {
> ColumnAccessAnalyzer columnAccessAnalyzer = new
> ColumnAccessAnalyzer(pCtx);
> setColumnAccessInfo(columnAccessAnalyzer.analyzeColumnAccess());
> }
> compiler.compile(pCtx, rootTasks, inputs, outputs);
> // TODO:
> // after compile, we can put accessed column list to ReadEntity getting
> from columnAccessInfo if HIVE_AUTHORIZATION_ENABLED is set true
> {code}
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