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https://issues.apache.org/jira/browse/PHOENIX-7006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17819742#comment-17819742
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ASF GitHub Bot commented on PHOENIX-7006:
-----------------------------------------
sanjeet006py commented on code in PR #1751:
URL: https://github.com/apache/phoenix/pull/1751#discussion_r1499613217
##########
phoenix-core-server/src/main/java/org/apache/phoenix/coprocessor/BaseScannerRegionObserver.java:
##########
@@ -527,6 +535,28 @@ public static boolean isMaxLookbackTimeEnabled(long
maxLookbackTime){
return maxLookbackTime > 0L;
}
+ public static long
getMaxLookbackAge(ObserverContext<RegionCoprocessorEnvironment> c) {
+ TableName tableName =
c.getEnvironment().getRegion().getRegionInfo().getTable();
+ String fullTableName = tableName.getNameAsString();
+ Configuration conf = c.getEnvironment().getConfiguration();
+ PTable table;
+ try(PhoenixConnection conn = QueryUtil.getConnectionOnServer(
+ conf).unwrap(PhoenixConnection.class)) {
+ table = conn.getTableNoCache(fullTableName);
+ }
+ catch (Exception e) {
+ if (e instanceof TableNotFoundException) {
+ LOGGER.debug("Ignoring HBase table that is not a Phoenix
table: "
+ + fullTableName);
+ // non-Phoenix HBase tables won't be found, do nothing
Review Comment:
As above WHERE clause was causing FULL SCAN over SYSCAT and to avoid that
went with an alternate approach. Please take a look. Thanks
> Configure maxLookbackAge at table level
> ---------------------------------------
>
> Key: PHOENIX-7006
> URL: https://issues.apache.org/jira/browse/PHOENIX-7006
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Sanjeet Malhotra
> Priority: Major
>
> Phoenix max lookback age feature preserves live or deleted row versions that
> are only visible through the max lookback window, it does not preserve any
> unwanted row versions that should not be visible through the max lookback
> window. More details on the max lookback redesign: PHOENIX-6888
> As of today, maxlookback age is only configurable at the cluster level
> (config key: {_}phoenix.max.lookback.age.seconds{_}), meaning the same value
> is used by all tables. This does not allow individual table level compaction
> scanner to be able to retain data based on the table level maxlookback age.
> Setting max lookback age at the table level can serve multiple purposes e.g.
> change-data-capture (PHOENIX-7001) for individual table should have it's own
> latest data retention period.
> The purpose of this Jira is to allow maxlookback age as a table level
> property:
> * New column in SYSTEM.CATALOG to preserve table level maxlookback age
> * PTable object to read the value of maxlookback from SYSTEM.CATALOG
> * Allow CREATE/ALTER TABLE DDLs to provide maxlookback attribute
> * CompactionScanner should use table level maxlookbackAge, if available,
> else use cluster level config
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