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foreign_storage::ParquetStringEncoder< V > Class Template Reference

#include <ParquetStringEncoder.h>

+ Inheritance diagram for foreign_storage::ParquetStringEncoder< V >:
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Public Member Functions

 ParquetStringEncoder (Data_Namespace::AbstractBuffer *buffer, StringDictionary *string_dictionary, ChunkMetadata *chunk_metadata)
 
void validateAndAppendData (const int16_t *def_levels, const int16_t *rep_levels, const int64_t values_read, const int64_t levels_read, int8_t *values, const SQLTypeInfo &column_type, InvalidRowGroupIndices &invalid_indices) override
 
void appendData (const int16_t *def_levels, const int16_t *rep_levels, const int64_t values_read, const int64_t levels_read, int8_t *values) override
 
void encodeAndCopyContiguous (const int8_t *parquet_data_bytes, int8_t *omnisci_data_bytes, const size_t num_elements) override
 
void encodeAndCopy (const int8_t *parquet_data_bytes, int8_t *omnisci_data_bytes) override
 
std::shared_ptr< ChunkMetadatagetRowGroupMetadata (const parquet::RowGroupMetaData *group_metadata, const int parquet_column_index, const SQLTypeInfo &column_type) override
 
- Public Member Functions inherited from foreign_storage::TypedParquetInPlaceEncoder< V, V >
 TypedParquetInPlaceEncoder (Data_Namespace::AbstractBuffer *buffer, const ColumnDescriptor *column_desciptor, const parquet::ColumnDescriptor *parquet_column_descriptor)
 
 TypedParquetInPlaceEncoder (Data_Namespace::AbstractBuffer *buffer, const size_t omnisci_data_type_byte_size, const size_t parquet_data_type_byte_size)
 
void validate (const int8_t *parquet_data, const int64_t j, const SQLTypeInfo &column_type) const override
 
void validateAndAppendData (const int16_t *def_levels, const int16_t *rep_levels, const int64_t values_read, const int64_t levels_read, int8_t *values, const SQLTypeInfo &column_type, InvalidRowGroupIndices &invalid_indices) override
 
void eraseInvalidIndicesInBuffer (const InvalidRowGroupIndices &invalid_indices) override
 
void appendData (const int16_t *def_levels, const int16_t *rep_levels, const int64_t values_read, const int64_t levels_read, int8_t *values) override
 
void encodeAndCopyContiguous (const int8_t *parquet_data_bytes, int8_t *omnisci_data_bytes, const size_t num_elements) override
 
void setNull (int8_t *omnisci_data_bytes) override
 
void copy (const int8_t *omnisci_data_bytes_source, int8_t *omnisci_data_bytes_destination) override
 
std::shared_ptr< ChunkMetadatagetRowGroupMetadata (const parquet::RowGroupMetaData *group_metadata, const int parquet_column_index, const SQLTypeInfo &column_type) override
 
- Public Member Functions inherited from foreign_storage::ParquetInPlaceEncoder
 ParquetInPlaceEncoder (Data_Namespace::AbstractBuffer *buffer, const size_t omnisci_data_type_byte_size, const size_t parquet_data_type_byte_size)
 
- Public Member Functions inherited from foreign_storage::ParquetScalarEncoder
 ParquetScalarEncoder (Data_Namespace::AbstractBuffer *buffer)
 
- Public Member Functions inherited from foreign_storage::ParquetEncoder
 ParquetEncoder (Data_Namespace::AbstractBuffer *buffer)
 
virtual ~ParquetEncoder ()=default
 

Protected Member Functions

bool encodingIsIdentityForSameTypes () const override
 
- Protected Member Functions inherited from foreign_storage::TypedParquetInPlaceEncoder< V, V >
std::pair< V, V > getUnencodedStats (std::shared_ptr< parquet::Statistics > stats) const
 

Private Member Functions

void updateMetadataStats (int64_t values_read, int8_t *values)
 

Private Attributes

StringDictionarystring_dictionary_
 
ChunkMetadatachunk_metadata_
 
std::vector< int8_t > encode_buffer_
 
min_
 
max_
 
int64_t current_batch_offset_
 
InvalidRowGroupIndicesinvalid_indices_
 

Additional Inherited Members

- Static Protected Member Functions inherited from foreign_storage::ParquetEncoder
static std::shared_ptr
< ChunkMetadata
createMetadata (const SQLTypeInfo &column_type)
 
static void throwNotNullViolation (const std::string &parquet_column_name)
 
static void validateNullCount (const std::string &parquet_column_name, int64_t null_count, const SQLTypeInfo &column_type)
 
- Protected Attributes inherited from foreign_storage::ParquetInPlaceEncoder
const size_t omnisci_data_type_byte_size_
 
const size_t parquet_data_type_byte_size_
 
- Protected Attributes inherited from foreign_storage::ParquetEncoder
Data_Namespace::AbstractBufferbuffer_
 

Detailed Description

template<typename V>
class foreign_storage::ParquetStringEncoder< V >

Definition at line 29 of file ParquetStringEncoder.h.

Constructor & Destructor Documentation

template<typename V >
foreign_storage::ParquetStringEncoder< V >::ParquetStringEncoder ( Data_Namespace::AbstractBuffer buffer,
StringDictionary string_dictionary,
ChunkMetadata chunk_metadata 
)
inline

Definition at line 31 of file ParquetStringEncoder.h.

34  : TypedParquetInPlaceEncoder<V, V>(buffer, sizeof(V), sizeof(V))
35  , string_dictionary_(string_dictionary)
36  , chunk_metadata_(chunk_metadata)
38  , min_(std::numeric_limits<V>::max())
39  , max_(std::numeric_limits<V>::lowest())
41  , invalid_indices_(nullptr) {}

Member Function Documentation

template<typename V >
void foreign_storage::ParquetStringEncoder< V >::appendData ( const int16_t *  def_levels,
const int16_t *  rep_levels,
const int64_t  values_read,
const int64_t  levels_read,
int8_t *  values 
)
inlineoverridevirtual

Appends Parquet data to the buffer using an in-place algorithm. Any necessary transformation or validation of the data and decoding of nulls is part of appending the data. Each class inheriting from this abstract class must implement the functionality to copy, nullify and encode the data.

Parameters
def_levels- an array containing the Dremel encoding definition levels
rep_levels- an array containing the Dremel encoding repetition levels
values_read- the number of non-null values read
levels_read- the total number of values (non-null & null) that are read
values- values that are read

Note that the Parquet format encodes nulls using Dremel encoding.

Reimplemented from foreign_storage::ParquetInPlaceEncoder.

Definition at line 65 of file ParquetStringEncoder.h.

References foreign_storage::TypedParquetInPlaceEncoder< V, T, NullType >::appendData(), foreign_storage::ParquetStringEncoder< V >::encode_buffer_, and foreign_storage::ParquetStringEncoder< V >::encodeAndCopyContiguous().

Referenced by foreign_storage::ParquetStringEncoder< V >::validateAndAppendData().

69  {
70  encodeAndCopyContiguous(values, encode_buffer_.data(), values_read);
72  def_levels, rep_levels, values_read, levels_read, encode_buffer_.data());
73  }
void appendData(const int16_t *def_levels, const int16_t *rep_levels, const int64_t values_read, const int64_t levels_read, int8_t *values) override
void encodeAndCopyContiguous(const int8_t *parquet_data_bytes, int8_t *omnisci_data_bytes, const size_t num_elements) override

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template<typename V >
void foreign_storage::ParquetStringEncoder< V >::encodeAndCopy ( const int8_t *  parquet_data_bytes,
int8_t *  omnisci_data_bytes 
)
inlineoverridevirtual

Implements foreign_storage::ParquetScalarEncoder.

Definition at line 97 of file ParquetStringEncoder.h.

References foreign_storage::TypedParquetInPlaceEncoder< V, T, NullType >::copy().

98  {
99  TypedParquetInPlaceEncoder<V, V>::copy(parquet_data_bytes, omnisci_data_bytes);
100  }
void copy(const int8_t *omnisci_data_bytes_source, int8_t *omnisci_data_bytes_destination) override

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template<typename V >
void foreign_storage::ParquetStringEncoder< V >::encodeAndCopyContiguous ( const int8_t *  parquet_data_bytes,
int8_t *  omnisci_data_bytes,
const size_t  num_elements 
)
inlineoverridevirtual

Implements foreign_storage::ParquetScalarEncoder.

Definition at line 75 of file ParquetStringEncoder.h.

References CHECK, StringDictionary::getOrAddBulk(), i, StringDictionary::MAX_STRLEN, foreign_storage::ParquetStringEncoder< V >::string_dictionary_, and foreign_storage::ParquetStringEncoder< V >::updateMetadataStats().

Referenced by foreign_storage::ParquetStringEncoder< V >::appendData(), and foreign_storage::ParquetStringEncoder< V >::validateAndAppendData().

77  {
79  auto parquet_data_ptr =
80  reinterpret_cast<const parquet::ByteArray*>(parquet_data_bytes);
81  auto omnisci_data_ptr = reinterpret_cast<V*>(omnisci_data_bytes);
82  std::vector<std::string_view> string_views;
83  string_views.reserve(num_elements);
84  for (size_t i = 0; i < num_elements; ++i) {
85  auto& byte_array = parquet_data_ptr[i];
86  if (byte_array.len <= StringDictionary::MAX_STRLEN) {
87  string_views.emplace_back(reinterpret_cast<const char*>(byte_array.ptr),
88  byte_array.len);
89  } else {
90  string_views.emplace_back(nullptr, 0);
91  }
92  }
93  string_dictionary_->getOrAddBulk(string_views, omnisci_data_ptr);
94  updateMetadataStats(num_elements, omnisci_data_bytes);
95  }
void updateMetadataStats(int64_t values_read, int8_t *values)
void getOrAddBulk(const std::vector< String > &string_vec, T *encoded_vec)
#define CHECK(condition)
Definition: Logger.h:209
static constexpr size_t MAX_STRLEN

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template<typename V >
bool foreign_storage::ParquetStringEncoder< V >::encodingIsIdentityForSameTypes ( ) const
inlineoverrideprotectedvirtual

Reimplemented from foreign_storage::TypedParquetInPlaceEncoder< V, V >.

Definition at line 115 of file ParquetStringEncoder.h.

115 { return true; }
template<typename V >
std::shared_ptr<ChunkMetadata> foreign_storage::ParquetStringEncoder< V >::getRowGroupMetadata ( const parquet::RowGroupMetaData *  group_metadata,
const int  parquet_column_index,
const SQLTypeInfo column_type 
)
inlineoverridevirtual

Reimplemented from foreign_storage::ParquetEncoder.

Definition at line 102 of file ParquetStringEncoder.h.

References foreign_storage::ParquetEncoder::getRowGroupMetadata(), and foreign_storage::ParquetInPlaceEncoder::omnisci_data_type_byte_size_.

105  {
106  auto metadata = ParquetEncoder::getRowGroupMetadata(
107  group_metadata, parquet_column_index, column_type);
108  auto column_metadata = group_metadata->ColumnChunk(parquet_column_index);
110  column_metadata->num_values();
111  return metadata;
112  }
virtual std::shared_ptr< ChunkMetadata > getRowGroupMetadata(const parquet::RowGroupMetaData *group_metadata, const int parquet_column_index, const SQLTypeInfo &column_type)

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template<typename V >
void foreign_storage::ParquetStringEncoder< V >::updateMetadataStats ( int64_t  values_read,
int8_t *  values 
)
inlineprivate

Definition at line 118 of file ParquetStringEncoder.h.

References foreign_storage::ParquetStringEncoder< V >::chunk_metadata_, ChunkMetadata::fillChunkStats(), i, foreign_storage::ParquetStringEncoder< V >::max_, and foreign_storage::ParquetStringEncoder< V >::min_.

Referenced by foreign_storage::ParquetStringEncoder< V >::encodeAndCopyContiguous().

118  {
119  if (!chunk_metadata_) {
120  return;
121  }
122  V* data_ptr = reinterpret_cast<V*>(values);
123  for (int64_t i = 0; i < values_read; ++i) {
124  min_ = std::min<V>(data_ptr[i], min_);
125  max_ = std::max<V>(data_ptr[i], max_);
126  }
128  }
void fillChunkStats(const T min, const T max, const bool has_nulls)
Definition: ChunkMetadata.h:73

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template<typename V >
void foreign_storage::ParquetStringEncoder< V >::validateAndAppendData ( const int16_t *  def_levels,
const int16_t *  rep_levels,
const int64_t  values_read,
const int64_t  levels_read,
int8_t *  values,
const SQLTypeInfo column_type,
InvalidRowGroupIndices invalid_indices 
)
inlineoverridevirtual

Implements foreign_storage::ParquetImportEncoder.

Definition at line 43 of file ParquetStringEncoder.h.

References foreign_storage::ParquetStringEncoder< V >::appendData(), CHECK, foreign_storage::ParquetStringEncoder< V >::current_batch_offset_, foreign_storage::ParquetStringEncoder< V >::encode_buffer_, foreign_storage::ParquetStringEncoder< V >::encodeAndCopyContiguous(), i, and StringDictionary::MAX_STRLEN.

49  {
50  auto parquet_data_ptr = reinterpret_cast<const parquet::ByteArray*>(values);
51  for (int64_t i = 0, j = 0; i < levels_read; ++i) {
52  if (def_levels[i]) {
53  CHECK(j < values_read);
54  auto& byte_array = parquet_data_ptr[j++];
55  if (byte_array.len > StringDictionary::MAX_STRLEN) {
56  invalid_indices.insert(current_batch_offset_ + i);
57  }
58  }
59  }
60  current_batch_offset_ += levels_read;
61  encodeAndCopyContiguous(values, encode_buffer_.data(), values_read);
62  appendData(def_levels, rep_levels, values_read, levels_read, values);
63  }
void appendData(const int16_t *def_levels, const int16_t *rep_levels, const int64_t values_read, const int64_t levels_read, int8_t *values) override
void encodeAndCopyContiguous(const int8_t *parquet_data_bytes, int8_t *omnisci_data_bytes, const size_t num_elements) override
#define CHECK(condition)
Definition: Logger.h:209
static constexpr size_t MAX_STRLEN

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Member Data Documentation

template<typename V >
ChunkMetadata* foreign_storage::ParquetStringEncoder< V >::chunk_metadata_
private
template<typename V >
int64_t foreign_storage::ParquetStringEncoder< V >::current_batch_offset_
private
template<typename V >
std::vector<int8_t> foreign_storage::ParquetStringEncoder< V >::encode_buffer_
private
template<typename V >
InvalidRowGroupIndices* foreign_storage::ParquetStringEncoder< V >::invalid_indices_
private

Definition at line 137 of file ParquetStringEncoder.h.

template<typename V >
V foreign_storage::ParquetStringEncoder< V >::max_
private
template<typename V >
V foreign_storage::ParquetStringEncoder< V >::min_
private
template<typename V >
StringDictionary* foreign_storage::ParquetStringEncoder< V >::string_dictionary_
private

The documentation for this class was generated from the following file: