1 files changed, 272 insertions, 0 deletions
diff --git a/src/rocksdb/table/table_properties.cc b/src/rocksdb/table/table_properties.cc
new file mode 100644
index 000000000..d1dacd1a5
--- /dev/null
+++ b/src/rocksdb/table/table_properties.cc
@@ -0,0 +1,272 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#include "rocksdb/table_properties.h"
+
+#include "port/port.h"
+#include "rocksdb/env.h"
+#include "rocksdb/iterator.h"
+#include "table/block_based/block.h"
+#include "table/internal_iterator.h"
+#include "table/table_properties_internal.h"
+#include "util/string_util.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+const uint32_t TablePropertiesCollectorFactory::Context::kUnknownColumnFamily =
+    port::kMaxInt32;
+
+namespace {
+  void AppendProperty(
+      std::string& props,
+      const std::string& key,
+      const std::string& value,
+      const std::string& prop_delim,
+      const std::string& kv_delim) {
+    props.append(key);
+    props.append(kv_delim);
+    props.append(value);
+    props.append(prop_delim);
+  }
+
+  template <class TValue>
+  void AppendProperty(
+      std::string& props,
+      const std::string& key,
+      const TValue& value,
+      const std::string& prop_delim,
+      const std::string& kv_delim) {
+    AppendProperty(
+        props, key, ToString(value), prop_delim, kv_delim
+    );
+  }
+
+  // Seek to the specified meta block.
+  // Return true if it successfully seeks to that block.
+  Status SeekToMetaBlock(InternalIterator* meta_iter,
+                         const std::string& block_name, bool* is_found,
+                         BlockHandle* block_handle = nullptr) {
+    if (block_handle != nullptr) {
+      *block_handle = BlockHandle::NullBlockHandle();
+    }
+    *is_found = true;
+    meta_iter->Seek(block_name);
+    if (meta_iter->status().ok()) {
+      if (meta_iter->Valid() && meta_iter->key() == block_name) {
+        *is_found = true;
+        if (block_handle) {
+          Slice v = meta_iter->value();
+          return block_handle->DecodeFrom(&v);
+        }
+      } else {
+        *is_found = false;
+        return Status::OK();
+      }
+    }
+    return meta_iter->status();
+  }
+}
+
+std::string TableProperties::ToString(
+    const std::string& prop_delim,
+    const std::string& kv_delim) const {
+  std::string result;
+  result.reserve(1024);
+
+  // Basic Info
+  AppendProperty(result, "# data blocks", num_data_blocks, prop_delim,
+                 kv_delim);
+  AppendProperty(result, "# entries", num_entries, prop_delim, kv_delim);
+  AppendProperty(result, "# deletions", num_deletions, prop_delim, kv_delim);
+  AppendProperty(result, "# merge operands", num_merge_operands, prop_delim,
+                 kv_delim);
+  AppendProperty(result, "# range deletions", num_range_deletions, prop_delim,
+                 kv_delim);
+
+  AppendProperty(result, "raw key size", raw_key_size, prop_delim, kv_delim);
+  AppendProperty(result, "raw average key size",
+                 num_entries != 0 ? 1.0 * raw_key_size / num_entries : 0.0,
+                 prop_delim, kv_delim);
+  AppendProperty(result, "raw value size", raw_value_size, prop_delim,
+                 kv_delim);
+  AppendProperty(result, "raw average value size",
+                 num_entries != 0 ? 1.0 * raw_value_size / num_entries : 0.0,
+                 prop_delim, kv_delim);
+
+  AppendProperty(result, "data block size", data_size, prop_delim, kv_delim);
+  char index_block_size_str[80];
+  snprintf(index_block_size_str, sizeof(index_block_size_str),
+           "index block size (user-key? %d, delta-value? %d)",
+           static_cast<int>(index_key_is_user_key),
+           static_cast<int>(index_value_is_delta_encoded));
+  AppendProperty(result, index_block_size_str, index_size, prop_delim,
+                 kv_delim);
+  if (index_partitions != 0) {
+    AppendProperty(result, "# index partitions", index_partitions, prop_delim,
+                   kv_delim);
+    AppendProperty(result, "top-level index size", top_level_index_size, prop_delim,
+                   kv_delim);
+  }
+  AppendProperty(result, "filter block size", filter_size, prop_delim,
+                 kv_delim);
+  AppendProperty(result, "(estimated) table size",
+                 data_size + index_size + filter_size, prop_delim, kv_delim);
+
+  AppendProperty(
+      result, "filter policy name",
+      filter_policy_name.empty() ? std::string("N/A") : filter_policy_name,
+      prop_delim, kv_delim);
+
+  AppendProperty(result, "prefix extractor name",
+                 prefix_extractor_name.empty() ? std::string("N/A")
+                                               : prefix_extractor_name,
+                 prop_delim, kv_delim);
+
+  AppendProperty(result, "column family ID",
+                 column_family_id ==
+                         ROCKSDB_NAMESPACE::TablePropertiesCollectorFactory::
+                             Context::kUnknownColumnFamily
+                     ? std::string("N/A")
+                     : ROCKSDB_NAMESPACE::ToString(column_family_id),
+                 prop_delim, kv_delim);
+  AppendProperty(
+      result, "column family name",
+      column_family_name.empty() ? std::string("N/A") : column_family_name,
+      prop_delim, kv_delim);
+
+  AppendProperty(result, "comparator name",
+                 comparator_name.empty() ? std::string("N/A") : comparator_name,
+                 prop_delim, kv_delim);
+
+  AppendProperty(
+      result, "merge operator name",
+      merge_operator_name.empty() ? std::string("N/A") : merge_operator_name,
+      prop_delim, kv_delim);
+
+  AppendProperty(result, "property collectors names",
+                 property_collectors_names.empty() ? std::string("N/A")
+                                                   : property_collectors_names,
+                 prop_delim, kv_delim);
+
+  AppendProperty(
+      result, "SST file compression algo",
+      compression_name.empty() ? std::string("N/A") : compression_name,
+      prop_delim, kv_delim);
+
+  AppendProperty(
+      result, "SST file compression options",
+      compression_options.empty() ? std::string("N/A") : compression_options,
+      prop_delim, kv_delim);
+
+  AppendProperty(result, "creation time", creation_time, prop_delim, kv_delim);
+
+  AppendProperty(result, "time stamp of earliest key", oldest_key_time,
+                 prop_delim, kv_delim);
+
+  AppendProperty(result, "file creation time", file_creation_time, prop_delim,
+                 kv_delim);
+
+  return result;
+}
+
+void TableProperties::Add(const TableProperties& tp) {
+  data_size += tp.data_size;
+  index_size += tp.index_size;
+  index_partitions += tp.index_partitions;
+  top_level_index_size += tp.top_level_index_size;
+  index_key_is_user_key += tp.index_key_is_user_key;
+  index_value_is_delta_encoded += tp.index_value_is_delta_encoded;
+  filter_size += tp.filter_size;
+  raw_key_size += tp.raw_key_size;
+  raw_value_size += tp.raw_value_size;
+  num_data_blocks += tp.num_data_blocks;
+  num_entries += tp.num_entries;
+  num_deletions += tp.num_deletions;
+  num_merge_operands += tp.num_merge_operands;
+  num_range_deletions += tp.num_range_deletions;
+}
+
+const std::string TablePropertiesNames::kDataSize  =
+    "rocksdb.data.size";
+const std::string TablePropertiesNames::kIndexSize =
+    "rocksdb.index.size";
+const std::string TablePropertiesNames::kIndexPartitions =
+    "rocksdb.index.partitions";
+const std::string TablePropertiesNames::kTopLevelIndexSize =
+    "rocksdb.top-level.index.size";
+const std::string TablePropertiesNames::kIndexKeyIsUserKey =
+    "rocksdb.index.key.is.user.key";
+const std::string TablePropertiesNames::kIndexValueIsDeltaEncoded =
+    "rocksdb.index.value.is.delta.encoded";
+const std::string TablePropertiesNames::kFilterSize =
+    "rocksdb.filter.size";
+const std::string TablePropertiesNames::kRawKeySize =
+    "rocksdb.raw.key.size";
+const std::string TablePropertiesNames::kRawValueSize =
+    "rocksdb.raw.value.size";
+const std::string TablePropertiesNames::kNumDataBlocks =
+    "rocksdb.num.data.blocks";
+const std::string TablePropertiesNames::kNumEntries =
+    "rocksdb.num.entries";
+const std::string TablePropertiesNames::kDeletedKeys = "rocksdb.deleted.keys";
+const std::string TablePropertiesNames::kMergeOperands =
+    "rocksdb.merge.operands";
+const std::string TablePropertiesNames::kNumRangeDeletions =
+    "rocksdb.num.range-deletions";
+const std::string TablePropertiesNames::kFilterPolicy =
+    "rocksdb.filter.policy";
+const std::string TablePropertiesNames::kFormatVersion =
+    "rocksdb.format.version";
+const std::string TablePropertiesNames::kFixedKeyLen =
+    "rocksdb.fixed.key.length";
+const std::string TablePropertiesNames::kColumnFamilyId =
+    "rocksdb.column.family.id";
+const std::string TablePropertiesNames::kColumnFamilyName =
+    "rocksdb.column.family.name";
+const std::string TablePropertiesNames::kComparator = "rocksdb.comparator";
+const std::string TablePropertiesNames::kMergeOperator =
+    "rocksdb.merge.operator";
+const std::string TablePropertiesNames::kPrefixExtractorName =
+    "rocksdb.prefix.extractor.name";
+const std::string TablePropertiesNames::kPropertyCollectors =
+    "rocksdb.property.collectors";
+const std::string TablePropertiesNames::kCompression = "rocksdb.compression";
+const std::string TablePropertiesNames::kCompressionOptions =
+    "rocksdb.compression_options";
+const std::string TablePropertiesNames::kCreationTime = "rocksdb.creation.time";
+const std::string TablePropertiesNames::kOldestKeyTime =
+    "rocksdb.oldest.key.time";
+const std::string TablePropertiesNames::kFileCreationTime =
+    "rocksdb.file.creation.time";
+
+extern const std::string kPropertiesBlock = "rocksdb.properties";
+// Old property block name for backward compatibility
+extern const std::string kPropertiesBlockOldName = "rocksdb.stats";
+extern const std::string kCompressionDictBlock = "rocksdb.compression_dict";
+extern const std::string kRangeDelBlock = "rocksdb.range_del";
+
+// Seek to the properties block.
+// Return true if it successfully seeks to the properties block.
+Status SeekToPropertiesBlock(InternalIterator* meta_iter, bool* is_found) {
+  Status status = SeekToMetaBlock(meta_iter, kPropertiesBlock, is_found);
+  if (!*is_found && status.ok()) {
+    status = SeekToMetaBlock(meta_iter, kPropertiesBlockOldName, is_found);
+  }
+  return status;
+}
+
+// Seek to the compression dictionary block.
+// Return true if it successfully seeks to that block.
+Status SeekToCompressionDictBlock(InternalIterator* meta_iter, bool* is_found,
+                                  BlockHandle* block_handle) {
+  return SeekToMetaBlock(meta_iter, kCompressionDictBlock, is_found, block_handle);
+}
+
+Status SeekToRangeDelBlock(InternalIterator* meta_iter, bool* is_found,
+                           BlockHandle* block_handle = nullptr) {
+  return SeekToMetaBlock(meta_iter, kRangeDelBlock, is_found, block_handle);
+}
+
+}  // namespace ROCKSDB_NAMESPACE