Github user samarthjain commented on a diff in the pull request: https://github.com/apache/phoenix/pull/153#discussion_r58117768 --- Diff: phoenix-core/src/main/java/org/apache/phoenix/coprocessor/MetaDataEndpointImpl.java --- @@ -3201,4 +3367,155 @@ private MetaDataMutationResult doDropFunction(long clientTimeStamp, List<byte[]> return new MetaDataMutationResult(MutationCode.FUNCTION_NOT_FOUND, EnvironmentEdgeManager.currentTimeMillis(), null); } + + @Override + public void createSchema(RpcController controller, CreateSchemaRequest request, + RpcCallback<MetaDataResponse> done) { + MetaDataResponse.Builder builder = MetaDataResponse.newBuilder(); + String schemaName = null; + try { + List<Mutation> schemaMutations = ProtobufUtil.getMutations(request); + schemaName = request.getSchemaName(); + Mutation m = MetaDataUtil.getPutOnlyTableHeaderRow(schemaMutations); + + byte[] lockKey = m.getRow(); + Region region = env.getRegion(); + MetaDataMutationResult result = checkSchemaKeyInRegion(lockKey, region); + if (result != null) { + done.run(MetaDataMutationResult.toProto(result)); + return; + } + List<RowLock> locks = Lists.newArrayList(); + long clientTimeStamp = MetaDataUtil.getClientTimeStamp(schemaMutations); + try { + acquireLock(region, lockKey, locks); + // Get as of latest timestamp so we can detect if we have a + // newer function that already + // exists without making an additional query + ImmutableBytesPtr cacheKey = new ImmutableBytesPtr(lockKey); + PSchema schema = loadSchema(env, lockKey, cacheKey, clientTimeStamp, clientTimeStamp); + if (schema != null) { + if (schema.getTimeStamp() < clientTimeStamp) { + builder.setReturnCode(MetaDataProtos.MutationCode.SCHEMA_ALREADY_EXISTS); + builder.setMutationTime(EnvironmentEdgeManager.currentTimeMillis()); + builder.setSchema(PSchema.toProto(schema)); + done.run(builder.build()); + return; + } else { + builder.setReturnCode(MetaDataProtos.MutationCode.NEWER_SCHEMA_FOUND); + builder.setMutationTime(EnvironmentEdgeManager.currentTimeMillis()); + builder.setSchema(PSchema.toProto(schema)); + done.run(builder.build()); + return; + } + } + region.mutateRowsWithLocks(schemaMutations, Collections.<byte[]> emptySet(), HConstants.NO_NONCE, + HConstants.NO_NONCE); + + // Invalidate the cache - the next getTable call will add it --- End diff -- Please update these comments.
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