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From samarthjain <...@git.apache.org>
Subject [GitHub] phoenix pull request: PHOENIX-1311 HBase namespaces surfaced in ph...
Date Tue, 05 Apr 2016 19:06:54 GMT
Github user samarthjain commented on a diff in the pull request:

    https://github.com/apache/phoenix/pull/153#discussion_r58597202
  
    --- Diff: phoenix-core/src/main/java/org/apache/phoenix/util/UpgradeUtil.java ---
    @@ -1279,4 +1304,129 @@ public static boolean truncateStats(HTableInterface metaTable,
HTableInterface s
             }
             return false;
         }
    +
    +    public static void mapTableToNamespace(HBaseAdmin admin, HTableInterface metatable,
String srcTableName,
    +            String destTableName, ReadOnlyProps props, Long ts, String phoenixTableName,
PTableType pTableType)
    +                    throws SnapshotCreationException, IllegalArgumentException, IOException,
InterruptedException,
    +                    SQLException {
    +        srcTableName = SchemaUtil.normalizeIdentifier(srcTableName);
    +        if (!SchemaUtil.isNamespaceMappingEnabled(
    +                SchemaUtil.isSystemTable(srcTableName.getBytes()) ? PTableType.SYSTEM
: null,
    +                props)) { throw new IllegalArgumentException(SchemaUtil.isSystemTable(srcTableName.getBytes())
    +                        ? "For system table " + QueryServices.IS_SYSTEM_TABLE_MAPPED_TO_NAMESPACE
    +                                + " also needs to be enabled along with " + QueryServices.IS_NAMESPACE_MAPPING_ENABLED
    +                        : QueryServices.IS_NAMESPACE_MAPPING_ENABLED + " is not enabled");
}
    +
    +        if (PTableType.TABLE.equals(pTableType) || PTableType.INDEX.equals(pTableType))
{
    +            admin.snapshot(srcTableName, srcTableName);
    +            admin.cloneSnapshot(srcTableName.getBytes(), destTableName.getBytes());
    +            admin.disableTable(srcTableName);
    --- End diff --
    
    Does disabling and deleting the srcTable here also delete the snapshot you created above.
If not, would it make sense to delete the snapshot? This is also making me think of failure
scenarios. What if any of the steps here fails? Do we restore the table using the snapshot?


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