parquet

package
v1.3.0 Latest Latest
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 Go to latest Published: May 24, 2019 License: Apache-2.0 Imports: 5 Imported by: 0

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Index

Constants

This section is empty.

Variables

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var ColumnChunk_FilePath_DEFAULT string
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var ColumnMetaData_DictionaryPageOffset_DEFAULT int64
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var ColumnMetaData_EncodingStats_DEFAULT []*PageEncodingStats
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var ColumnMetaData_IndexPageOffset_DEFAULT int64
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var ColumnMetaData_KeyValueMetadata_DEFAULT []*KeyValue
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var DataPageHeaderV2_IsCompressed_DEFAULT bool = true
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var DictionaryPageHeader_IsSorted_DEFAULT bool
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var FileMetaData_CreatedBy_DEFAULT string
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var FileMetaData_KeyValueMetadata_DEFAULT []*KeyValue
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var GoUnusedProtection__ int
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var KeyValue_Value_DEFAULT string
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var PageHeader_Crc_DEFAULT int32
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var RowGroup_SortingColumns_DEFAULT []*SortingColumn
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var SchemaElement_FieldID_DEFAULT int32
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var SchemaElement_NumChildren_DEFAULT int32
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var SchemaElement_Precision_DEFAULT int32
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var SchemaElement_Scale_DEFAULT int32
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var SchemaElement_TypeLength_DEFAULT int32
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var Statistics_DistinctCount_DEFAULT int64
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var Statistics_Max_DEFAULT []byte
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var Statistics_Min_DEFAULT []byte
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var Statistics_NullCount_DEFAULT int64

Functions

This section is empty.

Types

type ColumnChunk 

type ColumnChunk struct {
	FilePath   *string         `thrift:"file_path,1" db:"file_path" json:"file_path,omitempty"`
	FileOffset int64           `thrift:"file_offset,2,required" db:"file_offset" json:"file_offset"`
	MetaData   *ColumnMetaData `thrift:"meta_data,3" db:"meta_data" json:"meta_data,omitempty"`
}

Attributes:

  • FilePath: File where column data is stored. If not set, assumed to be same file as

metadata. This path is relative to the current file.

  • FileOffset: Byte offset in file_path to the ColumnMetaData *
  • MetaData: Column metadata for this chunk. This is the same content as what is at

file_path/file_offset. Having it here has it replicated in the file metadata.

func NewColumnChunk 

func NewColumnChunk() *ColumnChunk

func (*ColumnChunk) GetFileOffset 

func (p *ColumnChunk) GetFileOffset() int64

func (*ColumnChunk) GetFilePath 

func (p *ColumnChunk) GetFilePath() string

func (*ColumnChunk) GetMetaData 

func (p *ColumnChunk) GetMetaData() *ColumnMetaData

func (*ColumnChunk) IsSetFilePath 

func (p *ColumnChunk) IsSetFilePath() bool

func (*ColumnChunk) IsSetMetaData 

func (p *ColumnChunk) IsSetMetaData() bool

func (*ColumnChunk) Read 

func (p *ColumnChunk) Read(iprot thrift.TProtocol) error

func (*ColumnChunk) ReadField1 

func (p *ColumnChunk) ReadField1(iprot thrift.TProtocol) error

func (*ColumnChunk) ReadField2 

func (p *ColumnChunk) ReadField2(iprot thrift.TProtocol) error

func (*ColumnChunk) ReadField3 

func (p *ColumnChunk) ReadField3(iprot thrift.TProtocol) error

func (*ColumnChunk) String 

func (p *ColumnChunk) String() string

func (*ColumnChunk) Write 

func (p *ColumnChunk) Write(oprot thrift.TProtocol) error

type ColumnMetaData 

type ColumnMetaData struct {
	Type                  Type                 `thrift:"type,1,required" db:"type" json:"type"`
	Encodings             []Encoding           `thrift:"encodings,2,required" db:"encodings" json:"encodings"`
	PathInSchema          []string             `thrift:"path_in_schema,3,required" db:"path_in_schema" json:"path_in_schema"`
	Codec                 CompressionCodec     `thrift:"codec,4,required" db:"codec" json:"codec"`
	NumValues             int64                `thrift:"num_values,5,required" db:"num_values" json:"num_values"`
	TotalUncompressedSize int64                `thrift:"total_uncompressed_size,6,required" db:"total_uncompressed_size" json:"total_uncompressed_size"`
	TotalCompressedSize   int64                `thrift:"total_compressed_size,7,required" db:"total_compressed_size" json:"total_compressed_size"`
	KeyValueMetadata      []*KeyValue          `thrift:"key_value_metadata,8" db:"key_value_metadata" json:"key_value_metadata,omitempty"`
	DataPageOffset        int64                `thrift:"data_page_offset,9,required" db:"data_page_offset" json:"data_page_offset"`
	IndexPageOffset       *int64               `thrift:"index_page_offset,10" db:"index_page_offset" json:"index_page_offset,omitempty"`
	DictionaryPageOffset  *int64               `thrift:"dictionary_page_offset,11" db:"dictionary_page_offset" json:"dictionary_page_offset,omitempty"`
	Statistics            *Statistics          `thrift:"statistics,12" db:"statistics" json:"statistics,omitempty"`
	EncodingStats         []*PageEncodingStats `thrift:"encoding_stats,13" db:"encoding_stats" json:"encoding_stats,omitempty"`
}

Description for column metadata

Attributes:

  • Type: Type of this column *
  • Encodings: Set of all encodings used for this column. The purpose is to validate

whether we can decode those pages. *

  • PathInSchema: Path in schema *
  • Codec: Compression codec *
  • NumValues: Number of values in this column *
  • TotalUncompressedSize: total byte size of all uncompressed pages in this column chunk (including the headers) *
  • TotalCompressedSize: total byte size of all compressed pages in this column chunk (including the headers) *
  • KeyValueMetadata: Optional key/value metadata *
  • DataPageOffset: Byte offset from beginning of file to first data page *
  • IndexPageOffset: Byte offset from beginning of file to root index page *
  • DictionaryPageOffset: Byte offset from the beginning of file to first (only) dictionary page *
  • Statistics: optional statistics for this column chunk
  • EncodingStats: Set of all encodings used for pages in this column chunk.

This information can be used to determine if all data pages are dictionary encoded for example * 

var ColumnChunk_MetaData_DEFAULT *ColumnMetaData

func NewColumnMetaData 

func NewColumnMetaData() *ColumnMetaData

func (*ColumnMetaData) GetCodec 

func (p *ColumnMetaData) GetCodec() CompressionCodec

func (*ColumnMetaData) GetDataPageOffset 

func (p *ColumnMetaData) GetDataPageOffset() int64

func (*ColumnMetaData) GetDictionaryPageOffset 

func (p *ColumnMetaData) GetDictionaryPageOffset() int64

func (*ColumnMetaData) GetEncodingStats 

func (p *ColumnMetaData) GetEncodingStats() []*PageEncodingStats

func (*ColumnMetaData) GetEncodings 

func (p *ColumnMetaData) GetEncodings() []Encoding

func (*ColumnMetaData) GetIndexPageOffset 

func (p *ColumnMetaData) GetIndexPageOffset() int64

func (*ColumnMetaData) GetKeyValueMetadata 

func (p *ColumnMetaData) GetKeyValueMetadata() []*KeyValue

func (*ColumnMetaData) GetNumValues 

func (p *ColumnMetaData) GetNumValues() int64

func (*ColumnMetaData) GetPathInSchema 

func (p *ColumnMetaData) GetPathInSchema() []string

func (*ColumnMetaData) GetStatistics 

func (p *ColumnMetaData) GetStatistics() *Statistics

func (*ColumnMetaData) GetTotalCompressedSize 

func (p *ColumnMetaData) GetTotalCompressedSize() int64

func (*ColumnMetaData) GetTotalUncompressedSize 

func (p *ColumnMetaData) GetTotalUncompressedSize() int64

func (*ColumnMetaData) GetType 

func (p *ColumnMetaData) GetType() Type

func (*ColumnMetaData) IsSetDictionaryPageOffset 

func (p *ColumnMetaData) IsSetDictionaryPageOffset() bool

func (*ColumnMetaData) IsSetEncodingStats 

func (p *ColumnMetaData) IsSetEncodingStats() bool

func (*ColumnMetaData) IsSetIndexPageOffset 

func (p *ColumnMetaData) IsSetIndexPageOffset() bool

func (*ColumnMetaData) IsSetKeyValueMetadata 

func (p *ColumnMetaData) IsSetKeyValueMetadata() bool

func (*ColumnMetaData) IsSetStatistics 

func (p *ColumnMetaData) IsSetStatistics() bool

func (*ColumnMetaData) Read 

func (p *ColumnMetaData) Read(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField1 

func (p *ColumnMetaData) ReadField1(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField10 

func (p *ColumnMetaData) ReadField10(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField11 

func (p *ColumnMetaData) ReadField11(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField12 

func (p *ColumnMetaData) ReadField12(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField13 

func (p *ColumnMetaData) ReadField13(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField2 

func (p *ColumnMetaData) ReadField2(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField3 

func (p *ColumnMetaData) ReadField3(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField4 

func (p *ColumnMetaData) ReadField4(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField5 

func (p *ColumnMetaData) ReadField5(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField6 

func (p *ColumnMetaData) ReadField6(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField7 

func (p *ColumnMetaData) ReadField7(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField8 

func (p *ColumnMetaData) ReadField8(iprot thrift.TProtocol) error

func (*ColumnMetaData) ReadField9 

func (p *ColumnMetaData) ReadField9(iprot thrift.TProtocol) error

func (*ColumnMetaData) String 

func (p *ColumnMetaData) String() string

func (*ColumnMetaData) Write 

func (p *ColumnMetaData) Write(oprot thrift.TProtocol) error

type CompressionCodec 

type CompressionCodec int64

Supported compression algorithms. 

const (
	CompressionCodec_UNCOMPRESSED CompressionCodec = 0
	CompressionCodec_SNAPPY       CompressionCodec = 1
	CompressionCodec_GZIP         CompressionCodec = 2
	CompressionCodec_LZO          CompressionCodec = 3
)

func CompressionCodecFromString 

func CompressionCodecFromString(s string) (CompressionCodec, error)

func CompressionCodecPtr 

func CompressionCodecPtr(v CompressionCodec) *CompressionCodec

func (CompressionCodec) MarshalText 

func (p CompressionCodec) MarshalText() ([]byte, error)

func (*CompressionCodec) Scan 

func (p *CompressionCodec) Scan(value interface{}) error

func (CompressionCodec) String 

func (p CompressionCodec) String() string

func (*CompressionCodec) UnmarshalText 

func (p *CompressionCodec) UnmarshalText(text []byte) error

func (*CompressionCodec) Value 

func (p *CompressionCodec) Value() (driver.Value, error)

type ConvertedType 

type ConvertedType int64

Common types used by frameworks(e.g. hive, pig) using parquet. This helps map between types in those frameworks to the base types in parquet. This is only metadata and not needed to read or write the data. 

const (
	ConvertedType_UTF8             ConvertedType = 0
	ConvertedType_MAP              ConvertedType = 1
	ConvertedType_MAP_KEY_VALUE    ConvertedType = 2
	ConvertedType_LIST             ConvertedType = 3
	ConvertedType_ENUM             ConvertedType = 4
	ConvertedType_DECIMAL          ConvertedType = 5
	ConvertedType_DATE             ConvertedType = 6
	ConvertedType_TIME_MILLIS      ConvertedType = 7
	ConvertedType_TIME_MICROS      ConvertedType = 8
	ConvertedType_TIMESTAMP_MILLIS ConvertedType = 9
	ConvertedType_TIMESTAMP_MICROS ConvertedType = 10
	ConvertedType_UINT_8           ConvertedType = 11
	ConvertedType_UINT_16          ConvertedType = 12
	ConvertedType_UINT_32          ConvertedType = 13
	ConvertedType_UINT_64          ConvertedType = 14
	ConvertedType_INT_8            ConvertedType = 15
	ConvertedType_INT_16           ConvertedType = 16
	ConvertedType_INT_32           ConvertedType = 17
	ConvertedType_INT_64           ConvertedType = 18
	ConvertedType_JSON             ConvertedType = 19
	ConvertedType_BSON             ConvertedType = 20
	ConvertedType_INTERVAL         ConvertedType = 21
)
var SchemaElement_ConvertedType_DEFAULT ConvertedType

func ConvertedTypeFromString 

func ConvertedTypeFromString(s string) (ConvertedType, error)

func ConvertedTypePtr 

func ConvertedTypePtr(v ConvertedType) *ConvertedType

func (ConvertedType) MarshalText 

func (p ConvertedType) MarshalText() ([]byte, error)

func (*ConvertedType) Scan 

func (p *ConvertedType) Scan(value interface{}) error

func (ConvertedType) String 

func (p ConvertedType) String() string

func (*ConvertedType) UnmarshalText 

func (p *ConvertedType) UnmarshalText(text []byte) error

func (*ConvertedType) Value 

func (p *ConvertedType) Value() (driver.Value, error)

type DataPageHeader 

type DataPageHeader struct {
	NumValues               int32       `thrift:"num_values,1,required" db:"num_values" json:"num_values"`
	Encoding                Encoding    `thrift:"encoding,2,required" db:"encoding" json:"encoding"`
	DefinitionLevelEncoding Encoding    `thrift:"definition_level_encoding,3,required" db:"definition_level_encoding" json:"definition_level_encoding"`
	RepetitionLevelEncoding Encoding    `thrift:"repetition_level_encoding,4,required" db:"repetition_level_encoding" json:"repetition_level_encoding"`
	Statistics              *Statistics `thrift:"statistics,5" db:"statistics" json:"statistics,omitempty"`
}

Data page header

Attributes:

  • NumValues: Number of values, including NULLs, in this data page. *
  • Encoding: Encoding used for this data page *
  • DefinitionLevelEncoding: Encoding used for definition levels *
  • RepetitionLevelEncoding: Encoding used for repetition levels *
  • Statistics: Optional statistics for the data in this page*
var PageHeader_DataPageHeader_DEFAULT *DataPageHeader

func NewDataPageHeader 

func NewDataPageHeader() *DataPageHeader

func (*DataPageHeader) GetDefinitionLevelEncoding 

func (p *DataPageHeader) GetDefinitionLevelEncoding() Encoding

func (*DataPageHeader) GetEncoding 

func (p *DataPageHeader) GetEncoding() Encoding

func (*DataPageHeader) GetNumValues 

func (p *DataPageHeader) GetNumValues() int32

func (*DataPageHeader) GetRepetitionLevelEncoding 

func (p *DataPageHeader) GetRepetitionLevelEncoding() Encoding

func (*DataPageHeader) GetStatistics 

func (p *DataPageHeader) GetStatistics() *Statistics

func (*DataPageHeader) IsSetStatistics 

func (p *DataPageHeader) IsSetStatistics() bool

func (*DataPageHeader) Read 

func (p *DataPageHeader) Read(iprot thrift.TProtocol) error

func (*DataPageHeader) ReadField1 

func (p *DataPageHeader) ReadField1(iprot thrift.TProtocol) error

func (*DataPageHeader) ReadField2 

func (p *DataPageHeader) ReadField2(iprot thrift.TProtocol) error

func (*DataPageHeader) ReadField3 

func (p *DataPageHeader) ReadField3(iprot thrift.TProtocol) error

func (*DataPageHeader) ReadField4 

func (p *DataPageHeader) ReadField4(iprot thrift.TProtocol) error

func (*DataPageHeader) ReadField5 

func (p *DataPageHeader) ReadField5(iprot thrift.TProtocol) error

func (*DataPageHeader) String 

func (p *DataPageHeader) String() string

func (*DataPageHeader) Write 

func (p *DataPageHeader) Write(oprot thrift.TProtocol) error

type DataPageHeaderV2 

type DataPageHeaderV2 struct {
	NumValues                  int32       `thrift:"num_values,1,required" db:"num_values" json:"num_values"`
	NumNulls                   int32       `thrift:"num_nulls,2,required" db:"num_nulls" json:"num_nulls"`
	NumRows                    int32       `thrift:"num_rows,3,required" db:"num_rows" json:"num_rows"`
	Encoding                   Encoding    `thrift:"encoding,4,required" db:"encoding" json:"encoding"`
	DefinitionLevelsByteLength int32       `thrift:"definition_levels_byte_length,5,required" db:"definition_levels_byte_length" json:"definition_levels_byte_length"`
	RepetitionLevelsByteLength int32       `thrift:"repetition_levels_byte_length,6,required" db:"repetition_levels_byte_length" json:"repetition_levels_byte_length"`
	IsCompressed               bool        `thrift:"is_compressed,7" db:"is_compressed" json:"is_compressed,omitempty"`
	Statistics                 *Statistics `thrift:"statistics,8" db:"statistics" json:"statistics,omitempty"`
}

New page format alowing reading levels without decompressing the data Repetition and definition levels are uncompressed The remaining section containing the data is compressed if is_compressed is true

Attributes:

  • NumValues: Number of values, including NULLs, in this data page. *
  • NumNulls: Number of NULL values, in this data page.

Number of non-null = num_values - num_nulls which is also the number of values in the data section *

  • NumRows: Number of rows in this data page. which means pages change on record boundaries (r = 0) *
  • Encoding: Encoding used for data in this page *
  • DefinitionLevelsByteLength: length of the repetition levels
  • RepetitionLevelsByteLength: length of the definition levels
  • IsCompressed: whether the values are compressed.

Which means the section of the page between definition_levels_byte_length + repetition_levels_byte_length + 1 and compressed_page_size (included) is compressed with the compression_codec. If missing it is considered compressed

  • Statistics: optional statistics for this column chunk
var PageHeader_DataPageHeaderV2_DEFAULT *DataPageHeaderV2

func NewDataPageHeaderV2 

func NewDataPageHeaderV2() *DataPageHeaderV2

func (*DataPageHeaderV2) GetDefinitionLevelsByteLength 

func (p *DataPageHeaderV2) GetDefinitionLevelsByteLength() int32

func (*DataPageHeaderV2) GetEncoding 

func (p *DataPageHeaderV2) GetEncoding() Encoding

func (*DataPageHeaderV2) GetIsCompressed 

func (p *DataPageHeaderV2) GetIsCompressed() bool

func (*DataPageHeaderV2) GetNumNulls 

func (p *DataPageHeaderV2) GetNumNulls() int32

func (*DataPageHeaderV2) GetNumRows 

func (p *DataPageHeaderV2) GetNumRows() int32

func (*DataPageHeaderV2) GetNumValues 

func (p *DataPageHeaderV2) GetNumValues() int32

func (*DataPageHeaderV2) GetRepetitionLevelsByteLength 

func (p *DataPageHeaderV2) GetRepetitionLevelsByteLength() int32

func (*DataPageHeaderV2) GetStatistics 

func (p *DataPageHeaderV2) GetStatistics() *Statistics

func (*DataPageHeaderV2) IsSetIsCompressed 

func (p *DataPageHeaderV2) IsSetIsCompressed() bool

func (*DataPageHeaderV2) IsSetStatistics 

func (p *DataPageHeaderV2) IsSetStatistics() bool

func (*DataPageHeaderV2) Read 

func (p *DataPageHeaderV2) Read(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField1 

func (p *DataPageHeaderV2) ReadField1(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField2 

func (p *DataPageHeaderV2) ReadField2(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField3 

func (p *DataPageHeaderV2) ReadField3(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField4 

func (p *DataPageHeaderV2) ReadField4(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField5 

func (p *DataPageHeaderV2) ReadField5(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField6 

func (p *DataPageHeaderV2) ReadField6(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField7 

func (p *DataPageHeaderV2) ReadField7(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) ReadField8 

func (p *DataPageHeaderV2) ReadField8(iprot thrift.TProtocol) error

func (*DataPageHeaderV2) String 

func (p *DataPageHeaderV2) String() string

func (*DataPageHeaderV2) Write 

func (p *DataPageHeaderV2) Write(oprot thrift.TProtocol) error

type DictionaryPageHeader 

type DictionaryPageHeader struct {
	NumValues int32    `thrift:"num_values,1,required" db:"num_values" json:"num_values"`
	Encoding  Encoding `thrift:"encoding,2,required" db:"encoding" json:"encoding"`
	IsSorted  *bool    `thrift:"is_sorted,3" db:"is_sorted" json:"is_sorted,omitempty"`
}

TODO: *

Attributes:

  • NumValues: Number of values in the dictionary *
  • Encoding: Encoding using this dictionary page *
  • IsSorted: If true, the entries in the dictionary are sorted in ascending order *
var PageHeader_DictionaryPageHeader_DEFAULT *DictionaryPageHeader

func NewDictionaryPageHeader 

func NewDictionaryPageHeader() *DictionaryPageHeader

func (*DictionaryPageHeader) GetEncoding 

func (p *DictionaryPageHeader) GetEncoding() Encoding

func (*DictionaryPageHeader) GetIsSorted 

func (p *DictionaryPageHeader) GetIsSorted() bool

func (*DictionaryPageHeader) GetNumValues 

func (p *DictionaryPageHeader) GetNumValues() int32

func (*DictionaryPageHeader) IsSetIsSorted 

func (p *DictionaryPageHeader) IsSetIsSorted() bool

func (*DictionaryPageHeader) Read 

func (p *DictionaryPageHeader) Read(iprot thrift.TProtocol) error

func (*DictionaryPageHeader) ReadField1 

func (p *DictionaryPageHeader) ReadField1(iprot thrift.TProtocol) error

func (*DictionaryPageHeader) ReadField2 

func (p *DictionaryPageHeader) ReadField2(iprot thrift.TProtocol) error

func (*DictionaryPageHeader) ReadField3 

func (p *DictionaryPageHeader) ReadField3(iprot thrift.TProtocol) error

func (*DictionaryPageHeader) String 

func (p *DictionaryPageHeader) String() string

func (*DictionaryPageHeader) Write 

func (p *DictionaryPageHeader) Write(oprot thrift.TProtocol) error

type Encoding 

type Encoding int64

Encodings supported by Parquet. Not all encodings are valid for all types. These enums are also used to specify the encoding of definition and repetition levels. See the accompanying doc for the details of the more complicated encodings. 

const (
	Encoding_PLAIN                   Encoding = 0
	Encoding_PLAIN_DICTIONARY        Encoding = 2
	Encoding_RLE                     Encoding = 3
	Encoding_BIT_PACKED              Encoding = 4
	Encoding_DELTA_BINARY_PACKED     Encoding = 5
	Encoding_DELTA_LENGTH_BYTE_ARRAY Encoding = 6
	Encoding_DELTA_BYTE_ARRAY        Encoding = 7
	Encoding_RLE_DICTIONARY          Encoding = 8
)

func EncodingFromString 

func EncodingFromString(s string) (Encoding, error)

func EncodingPtr 

func EncodingPtr(v Encoding) *Encoding

func (Encoding) MarshalText 

func (p Encoding) MarshalText() ([]byte, error)

func (*Encoding) Scan 

func (p *Encoding) Scan(value interface{}) error

func (Encoding) String 

func (p Encoding) String() string

func (*Encoding) UnmarshalText 

func (p *Encoding) UnmarshalText(text []byte) error

func (*Encoding) Value 

func (p *Encoding) Value() (driver.Value, error)

type FieldRepetitionType 

type FieldRepetitionType int64

Representation of Schemas 

const (
	FieldRepetitionType_REQUIRED FieldRepetitionType = 0
	FieldRepetitionType_OPTIONAL FieldRepetitionType = 1
	FieldRepetitionType_REPEATED FieldRepetitionType = 2
)
var SchemaElement_RepetitionType_DEFAULT FieldRepetitionType

func FieldRepetitionTypeFromString 

func FieldRepetitionTypeFromString(s string) (FieldRepetitionType, error)

func FieldRepetitionTypePtr 

func FieldRepetitionTypePtr(v FieldRepetitionType) *FieldRepetitionType

func (FieldRepetitionType) MarshalText 

func (p FieldRepetitionType) MarshalText() ([]byte, error)

func (*FieldRepetitionType) Scan 

func (p *FieldRepetitionType) Scan(value interface{}) error

func (FieldRepetitionType) String 

func (p FieldRepetitionType) String() string

func (*FieldRepetitionType) UnmarshalText 

func (p *FieldRepetitionType) UnmarshalText(text []byte) error

func (*FieldRepetitionType) Value 

func (p *FieldRepetitionType) Value() (driver.Value, error)

type FileMetaData 

type FileMetaData struct {
	Version          int32            `thrift:"version,1,required" db:"version" json:"version"`
	Schema           []*SchemaElement `thrift:"schema,2,required" db:"schema" json:"schema"`
	NumRows          int64            `thrift:"num_rows,3,required" db:"num_rows" json:"num_rows"`
	RowGroups        []*RowGroup      `thrift:"row_groups,4,required" db:"row_groups" json:"row_groups"`
	KeyValueMetadata []*KeyValue      `thrift:"key_value_metadata,5" db:"key_value_metadata" json:"key_value_metadata,omitempty"`
	CreatedBy        *string          `thrift:"created_by,6" db:"created_by" json:"created_by,omitempty"`
}

Description for file metadata

Attributes:

  • Version: Version of this file *
  • Schema: Parquet schema for this file. This schema contains metadata for all the columns.

The schema is represented as a tree with a single root. The nodes of the tree are flattened to a list by doing a depth-first traversal. The column metadata contains the path in the schema for that column which can be used to map columns to nodes in the schema. The first element is the root *

  • NumRows: Number of rows in this file *
  • RowGroups: Row groups in this file *
  • KeyValueMetadata: Optional key/value metadata *
  • CreatedBy: String for application that wrote this file. This should be in the format

<Application> version <App Version> (build <App Build Hash>). e.g. impala version 1.0 (build 6cf94d29b2b7115df4de2c06e2ab4326d721eb55)

func NewFileMetaData 

func NewFileMetaData() *FileMetaData

func (*FileMetaData) GetCreatedBy 

func (p *FileMetaData) GetCreatedBy() string

func (*FileMetaData) GetKeyValueMetadata 

func (p *FileMetaData) GetKeyValueMetadata() []*KeyValue

func (*FileMetaData) GetNumRows 

func (p *FileMetaData) GetNumRows() int64

func (*FileMetaData) GetRowGroups 

func (p *FileMetaData) GetRowGroups() []*RowGroup

func (*FileMetaData) GetSchema 

func (p *FileMetaData) GetSchema() []*SchemaElement

func (*FileMetaData) GetVersion 

func (p *FileMetaData) GetVersion() int32

func (*FileMetaData) IsSetCreatedBy 

func (p *FileMetaData) IsSetCreatedBy() bool

func (*FileMetaData) IsSetKeyValueMetadata 

func (p *FileMetaData) IsSetKeyValueMetadata() bool

func (*FileMetaData) Read 

func (p *FileMetaData) Read(iprot thrift.TProtocol) error

func (*FileMetaData) ReadField1 

func (p *FileMetaData) ReadField1(iprot thrift.TProtocol) error

func (*FileMetaData) ReadField2 

func (p *FileMetaData) ReadField2(iprot thrift.TProtocol) error

func (*FileMetaData) ReadField3 

func (p *FileMetaData) ReadField3(iprot thrift.TProtocol) error

func (*FileMetaData) ReadField4 

func (p *FileMetaData) ReadField4(iprot thrift.TProtocol) error

func (*FileMetaData) ReadField5 

func (p *FileMetaData) ReadField5(iprot thrift.TProtocol) error

func (*FileMetaData) ReadField6 

func (p *FileMetaData) ReadField6(iprot thrift.TProtocol) error

func (*FileMetaData) String 

func (p *FileMetaData) String() string

func (*FileMetaData) Write 

func (p *FileMetaData) Write(oprot thrift.TProtocol) error

type IndexPageHeader 

type IndexPageHeader struct {
}
var PageHeader_IndexPageHeader_DEFAULT *IndexPageHeader

func NewIndexPageHeader 

func NewIndexPageHeader() *IndexPageHeader

func (*IndexPageHeader) Read 

func (p *IndexPageHeader) Read(iprot thrift.TProtocol) error

func (*IndexPageHeader) String 

func (p *IndexPageHeader) String() string

func (*IndexPageHeader) Write 

func (p *IndexPageHeader) Write(oprot thrift.TProtocol) error

type KeyValue 

type KeyValue struct {
	Key   string  `thrift:"key,1,required" db:"key" json:"key"`
	Value *string `thrift:"value,2" db:"value" json:"value,omitempty"`
}

Wrapper struct to store key values

Attributes:

  • Key
  • Value

func NewKeyValue 

func NewKeyValue() *KeyValue

func (*KeyValue) GetKey 

func (p *KeyValue) GetKey() string

func (*KeyValue) GetValue 

func (p *KeyValue) GetValue() string

func (*KeyValue) IsSetValue 

func (p *KeyValue) IsSetValue() bool

func (*KeyValue) Read 

func (p *KeyValue) Read(iprot thrift.TProtocol) error

func (*KeyValue) ReadField1 

func (p *KeyValue) ReadField1(iprot thrift.TProtocol) error

func (*KeyValue) ReadField2 

func (p *KeyValue) ReadField2(iprot thrift.TProtocol) error

func (*KeyValue) String 

func (p *KeyValue) String() string

func (*KeyValue) Write 

func (p *KeyValue) Write(oprot thrift.TProtocol) error

type PageEncodingStats 

type PageEncodingStats struct {
	PageType PageType `thrift:"page_type,1,required" db:"page_type" json:"page_type"`
	Encoding Encoding `thrift:"encoding,2,required" db:"encoding" json:"encoding"`
	Count    int32    `thrift:"count,3,required" db:"count" json:"count"`
}

statistics of a given page type and encoding

Attributes:

  • PageType: the page type (data/dic/...) *
  • Encoding: encoding of the page *
  • Count: number of pages of this type with this encoding *

func NewPageEncodingStats 

func NewPageEncodingStats() *PageEncodingStats

func (*PageEncodingStats) GetCount 

func (p *PageEncodingStats) GetCount() int32

func (*PageEncodingStats) GetEncoding 

func (p *PageEncodingStats) GetEncoding() Encoding

func (*PageEncodingStats) GetPageType 

func (p *PageEncodingStats) GetPageType() PageType

func (*PageEncodingStats) Read 

func (p *PageEncodingStats) Read(iprot thrift.TProtocol) error

func (*PageEncodingStats) ReadField1 

func (p *PageEncodingStats) ReadField1(iprot thrift.TProtocol) error

func (*PageEncodingStats) ReadField2 

func (p *PageEncodingStats) ReadField2(iprot thrift.TProtocol) error

func (*PageEncodingStats) ReadField3 

func (p *PageEncodingStats) ReadField3(iprot thrift.TProtocol) error

func (*PageEncodingStats) String 

func (p *PageEncodingStats) String() string

func (*PageEncodingStats) Write 

func (p *PageEncodingStats) Write(oprot thrift.TProtocol) error
type PageHeader struct {
	Type                 PageType              `thrift:"type,1,required" db:"type" json:"type"`
	UncompressedPageSize int32                 `thrift:"uncompressed_page_size,2,required" db:"uncompressed_page_size" json:"uncompressed_page_size"`
	CompressedPageSize   int32                 `thrift:"compressed_page_size,3,required" db:"compressed_page_size" json:"compressed_page_size"`
	Crc                  *int32                `thrift:"crc,4" db:"crc" json:"crc,omitempty"`
	DataPageHeader       *DataPageHeader       `thrift:"data_page_header,5" db:"data_page_header" json:"data_page_header,omitempty"`
	IndexPageHeader      *IndexPageHeader      `thrift:"index_page_header,6" db:"index_page_header" json:"index_page_header,omitempty"`
	DictionaryPageHeader *DictionaryPageHeader `thrift:"dictionary_page_header,7" db:"dictionary_page_header" json:"dictionary_page_header,omitempty"`
	DataPageHeaderV2     *DataPageHeaderV2     `thrift:"data_page_header_v2,8" db:"data_page_header_v2" json:"data_page_header_v2,omitempty"`
}

Attributes:

  • Type: the type of the page: indicates which of the *_header fields is set *
  • UncompressedPageSize: Uncompressed page size in bytes (not including this header) *
  • CompressedPageSize: Compressed page size in bytes (not including this header) *
  • Crc: 32bit crc for the data below. This allows for disabling checksumming in HDFS

if only a few pages needs to be read

  • DataPageHeader
  • IndexPageHeader
  • DictionaryPageHeader
  • DataPageHeaderV2

func NewPageHeader 

func NewPageHeader() *PageHeader

func (*PageHeader) GetCompressedPageSize 

func (p *PageHeader) GetCompressedPageSize() int32

func (*PageHeader) GetCrc 

func (p *PageHeader) GetCrc() int32

func (*PageHeader) GetDataPageHeader 

func (p *PageHeader) GetDataPageHeader() *DataPageHeader

func (*PageHeader) GetDataPageHeaderV2 

func (p *PageHeader) GetDataPageHeaderV2() *DataPageHeaderV2

func (*PageHeader) GetDictionaryPageHeader 

func (p *PageHeader) GetDictionaryPageHeader() *DictionaryPageHeader

func (*PageHeader) GetIndexPageHeader 

func (p *PageHeader) GetIndexPageHeader() *IndexPageHeader

func (*PageHeader) GetType 

func (p *PageHeader) GetType() PageType

func (*PageHeader) GetUncompressedPageSize 

func (p *PageHeader) GetUncompressedPageSize() int32

func (*PageHeader) IsSetCrc 

func (p *PageHeader) IsSetCrc() bool

func (*PageHeader) IsSetDataPageHeader 

func (p *PageHeader) IsSetDataPageHeader() bool

func (*PageHeader) IsSetDataPageHeaderV2 

func (p *PageHeader) IsSetDataPageHeaderV2() bool

func (*PageHeader) IsSetDictionaryPageHeader 

func (p *PageHeader) IsSetDictionaryPageHeader() bool

func (*PageHeader) IsSetIndexPageHeader 

func (p *PageHeader) IsSetIndexPageHeader() bool

func (*PageHeader) Read 

func (p *PageHeader) Read(iprot thrift.TProtocol) error

func (*PageHeader) ReadField1 

func (p *PageHeader) ReadField1(iprot thrift.TProtocol) error

func (*PageHeader) ReadField2 

func (p *PageHeader) ReadField2(iprot thrift.TProtocol) error

func (*PageHeader) ReadField3 

func (p *PageHeader) ReadField3(iprot thrift.TProtocol) error

func (*PageHeader) ReadField4 

func (p *PageHeader) ReadField4(iprot thrift.TProtocol) error

func (*PageHeader) ReadField5 

func (p *PageHeader) ReadField5(iprot thrift.TProtocol) error

func (*PageHeader) ReadField6 

func (p *PageHeader) ReadField6(iprot thrift.TProtocol) error

func (*PageHeader) ReadField7 

func (p *PageHeader) ReadField7(iprot thrift.TProtocol) error

func (*PageHeader) ReadField8 

func (p *PageHeader) ReadField8(iprot thrift.TProtocol) error

func (*PageHeader) String 

func (p *PageHeader) String() string

func (*PageHeader) Write 

func (p *PageHeader) Write(oprot thrift.TProtocol) error

type PageType 

type PageType int64
const (
	PageType_DATA_PAGE       PageType = 0
	PageType_INDEX_PAGE      PageType = 1
	PageType_DICTIONARY_PAGE PageType = 2
	PageType_DATA_PAGE_V2    PageType = 3
)

func PageTypeFromString 

func PageTypeFromString(s string) (PageType, error)

func PageTypePtr 

func PageTypePtr(v PageType) *PageType

func (PageType) MarshalText 

func (p PageType) MarshalText() ([]byte, error)

func (*PageType) Scan 

func (p *PageType) Scan(value interface{}) error

func (PageType) String 

func (p PageType) String() string

func (*PageType) UnmarshalText 

func (p *PageType) UnmarshalText(text []byte) error

func (*PageType) Value 

func (p *PageType) Value() (driver.Value, error)

type RowGroup 

type RowGroup struct {
	Columns        []*ColumnChunk   `thrift:"columns,1,required" db:"columns" json:"columns"`
	TotalByteSize  int64            `thrift:"total_byte_size,2,required" db:"total_byte_size" json:"total_byte_size"`
	NumRows        int64            `thrift:"num_rows,3,required" db:"num_rows" json:"num_rows"`
	SortingColumns []*SortingColumn `thrift:"sorting_columns,4" db:"sorting_columns" json:"sorting_columns,omitempty"`
}

Attributes:

  • Columns: Metadata for each column chunk in this row group.

This list must have the same order as the SchemaElement list in FileMetaData.

  • TotalByteSize: Total byte size of all the uncompressed column data in this row group *
  • NumRows: Number of rows in this row group *
  • SortingColumns: If set, specifies a sort ordering of the rows in this RowGroup.

The sorting columns can be a subset of all the columns.

func NewRowGroup 

func NewRowGroup() *RowGroup

func (*RowGroup) GetColumns 

func (p *RowGroup) GetColumns() []*ColumnChunk

func (*RowGroup) GetNumRows 

func (p *RowGroup) GetNumRows() int64

func (*RowGroup) GetSortingColumns 

func (p *RowGroup) GetSortingColumns() []*SortingColumn

func (*RowGroup) GetTotalByteSize 

func (p *RowGroup) GetTotalByteSize() int64

func (*RowGroup) IsSetSortingColumns 

func (p *RowGroup) IsSetSortingColumns() bool

func (*RowGroup) Read 

func (p *RowGroup) Read(iprot thrift.TProtocol) error

func (*RowGroup) ReadField1 

func (p *RowGroup) ReadField1(iprot thrift.TProtocol) error

func (*RowGroup) ReadField2 

func (p *RowGroup) ReadField2(iprot thrift.TProtocol) error

func (*RowGroup) ReadField3 

func (p *RowGroup) ReadField3(iprot thrift.TProtocol) error

func (*RowGroup) ReadField4 

func (p *RowGroup) ReadField4(iprot thrift.TProtocol) error

func (*RowGroup) String 

func (p *RowGroup) String() string

func (*RowGroup) Write 

func (p *RowGroup) Write(oprot thrift.TProtocol) error

type SchemaElement 

type SchemaElement struct {
	Type           *Type                `thrift:"type,1" db:"type" json:"type,omitempty"`
	TypeLength     *int32               `thrift:"type_length,2" db:"type_length" json:"type_length,omitempty"`
	RepetitionType *FieldRepetitionType `thrift:"repetition_type,3" db:"repetition_type" json:"repetition_type,omitempty"`
	Name           string               `thrift:"name,4,required" db:"name" json:"name"`
	NumChildren    *int32               `thrift:"num_children,5" db:"num_children" json:"num_children,omitempty"`
	ConvertedType  *ConvertedType       `thrift:"converted_type,6" db:"converted_type" json:"converted_type,omitempty"`
	Scale          *int32               `thrift:"scale,7" db:"scale" json:"scale,omitempty"`
	Precision      *int32               `thrift:"precision,8" db:"precision" json:"precision,omitempty"`
	FieldID        *int32               `thrift:"field_id,9" db:"field_id" json:"field_id,omitempty"`
}

Represents a element inside a schema definition.

  • if it is a group (inner node) then type is undefined and num_children is defined
  • if it is a primitive type (leaf) then type is defined and num_children is undefined

the nodes are listed in depth first traversal order.

Attributes:

  • Type: Data type for this field. Not set if the current element is a non-leaf node
  • TypeLength: If type is FIXED_LEN_BYTE_ARRAY, this is the byte length of the vales.

Otherwise, if specified, this is the maximum bit length to store any of the values. (e.g. a low cardinality INT col could have this set to 3). Note that this is in the schema, and therefore fixed for the entire file.

  • RepetitionType: repetition of the field. The root of the schema does not have a repetition_type.

All other nodes must have one

  • Name: Name of the field in the schema
  • NumChildren: Nested fields. Since thrift does not support nested fields,

the nesting is flattened to a single list by a depth-first traversal. The children count is used to construct the nested relationship. This field is not set when the element is a primitive type

  • ConvertedType: When the schema is the result of a conversion from another model

Used to record the original type to help with cross conversion.

  • Scale: Used when this column contains decimal data.

See the DECIMAL converted type for more details.

  • Precision
  • FieldID: When the original schema supports field ids, this will save the

original field id in the parquet schema

func NewSchemaElement 

func NewSchemaElement() *SchemaElement

func (*SchemaElement) GetConvertedType 

func (p *SchemaElement) GetConvertedType() ConvertedType

func (*SchemaElement) GetFieldID 

func (p *SchemaElement) GetFieldID() int32

func (*SchemaElement) GetName 

func (p *SchemaElement) GetName() string

func (*SchemaElement) GetNumChildren 

func (p *SchemaElement) GetNumChildren() int32

func (*SchemaElement) GetPrecision 

func (p *SchemaElement) GetPrecision() int32

func (*SchemaElement) GetRepetitionType 

func (p *SchemaElement) GetRepetitionType() FieldRepetitionType

func (*SchemaElement) GetScale 

func (p *SchemaElement) GetScale() int32

func (*SchemaElement) GetType 

func (p *SchemaElement) GetType() Type

func (*SchemaElement) GetTypeLength 

func (p *SchemaElement) GetTypeLength() int32

func (*SchemaElement) IsSetConvertedType 

func (p *SchemaElement) IsSetConvertedType() bool

func (*SchemaElement) IsSetFieldID 

func (p *SchemaElement) IsSetFieldID() bool

func (*SchemaElement) IsSetNumChildren 

func (p *SchemaElement) IsSetNumChildren() bool

func (*SchemaElement) IsSetPrecision 

func (p *SchemaElement) IsSetPrecision() bool

func (*SchemaElement) IsSetRepetitionType 

func (p *SchemaElement) IsSetRepetitionType() bool

func (*SchemaElement) IsSetScale 

func (p *SchemaElement) IsSetScale() bool

func (*SchemaElement) IsSetType 

func (p *SchemaElement) IsSetType() bool

func (*SchemaElement) IsSetTypeLength 

func (p *SchemaElement) IsSetTypeLength() bool

func (*SchemaElement) Read 

func (p *SchemaElement) Read(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField1 

func (p *SchemaElement) ReadField1(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField2 

func (p *SchemaElement) ReadField2(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField3 

func (p *SchemaElement) ReadField3(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField4 

func (p *SchemaElement) ReadField4(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField5 

func (p *SchemaElement) ReadField5(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField6 

func (p *SchemaElement) ReadField6(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField7 

func (p *SchemaElement) ReadField7(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField8 

func (p *SchemaElement) ReadField8(iprot thrift.TProtocol) error

func (*SchemaElement) ReadField9 

func (p *SchemaElement) ReadField9(iprot thrift.TProtocol) error

func (*SchemaElement) String 

func (p *SchemaElement) String() string

func (*SchemaElement) Write 

func (p *SchemaElement) Write(oprot thrift.TProtocol) error

type SortingColumn 

type SortingColumn struct {
	ColumnIdx  int32 `thrift:"column_idx,1,required" db:"column_idx" json:"column_idx"`
	Descending bool  `thrift:"descending,2,required" db:"descending" json:"descending"`
	NullsFirst bool  `thrift:"nulls_first,3,required" db:"nulls_first" json:"nulls_first"`
}

Wrapper struct to specify sort order

Attributes:

  • ColumnIdx: The column index (in this row group) *
  • Descending: If true, indicates this column is sorted in descending order. *
  • NullsFirst: If true, nulls will come before non-null values, otherwise,

nulls go at the end.

func NewSortingColumn 

func NewSortingColumn() *SortingColumn

func (*SortingColumn) GetColumnIdx 

func (p *SortingColumn) GetColumnIdx() int32

func (*SortingColumn) GetDescending 

func (p *SortingColumn) GetDescending() bool

func (*SortingColumn) GetNullsFirst 

func (p *SortingColumn) GetNullsFirst() bool

func (*SortingColumn) Read 

func (p *SortingColumn) Read(iprot thrift.TProtocol) error

func (*SortingColumn) ReadField1 

func (p *SortingColumn) ReadField1(iprot thrift.TProtocol) error

func (*SortingColumn) ReadField2 

func (p *SortingColumn) ReadField2(iprot thrift.TProtocol) error

func (*SortingColumn) ReadField3 

func (p *SortingColumn) ReadField3(iprot thrift.TProtocol) error

func (*SortingColumn) String 

func (p *SortingColumn) String() string

func (*SortingColumn) Write 

func (p *SortingColumn) Write(oprot thrift.TProtocol) error

type Statistics 

type Statistics struct {
	Max           []byte `thrift:"max,1" db:"max" json:"max,omitempty"`
	Min           []byte `thrift:"min,2" db:"min" json:"min,omitempty"`
	NullCount     *int64 `thrift:"null_count,3" db:"null_count" json:"null_count,omitempty"`
	DistinctCount *int64 `thrift:"distinct_count,4" db:"distinct_count" json:"distinct_count,omitempty"`
}

Statistics per row group and per page All fields are optional.

Attributes:

  • Max: min and max value of the column, encoded in PLAIN encoding
  • Min
  • NullCount: count of null value in the column
  • DistinctCount: count of distinct values occurring
var ColumnMetaData_Statistics_DEFAULT *Statistics
var DataPageHeaderV2_Statistics_DEFAULT *Statistics
var DataPageHeader_Statistics_DEFAULT *Statistics

func NewStatistics 

func NewStatistics() *Statistics

func (*Statistics) GetDistinctCount 

func (p *Statistics) GetDistinctCount() int64

func (*Statistics) GetMax 

func (p *Statistics) GetMax() []byte

func (*Statistics) GetMin 

func (p *Statistics) GetMin() []byte

func (*Statistics) GetNullCount 

func (p *Statistics) GetNullCount() int64

func (*Statistics) IsSetDistinctCount 

func (p *Statistics) IsSetDistinctCount() bool

func (*Statistics) IsSetMax 

func (p *Statistics) IsSetMax() bool

func (*Statistics) IsSetMin 

func (p *Statistics) IsSetMin() bool

func (*Statistics) IsSetNullCount 

func (p *Statistics) IsSetNullCount() bool

func (*Statistics) Read 

func (p *Statistics) Read(iprot thrift.TProtocol) error

func (*Statistics) ReadField1 

func (p *Statistics) ReadField1(iprot thrift.TProtocol) error

func (*Statistics) ReadField2 

func (p *Statistics) ReadField2(iprot thrift.TProtocol) error

func (*Statistics) ReadField3 

func (p *Statistics) ReadField3(iprot thrift.TProtocol) error

func (*Statistics) ReadField4 

func (p *Statistics) ReadField4(iprot thrift.TProtocol) error

func (*Statistics) String 

func (p *Statistics) String() string

func (*Statistics) Write 

func (p *Statistics) Write(oprot thrift.TProtocol) error

type Type 

type Type int64

Types supported by Parquet. These types are intended to be used in combination with the encodings to control the on disk storage format. For example INT16 is not included as a type since a good encoding of INT32 would handle this. 

const (
	Type_BOOLEAN              Type = 0
	Type_INT32                Type = 1
	Type_INT64                Type = 2
	Type_INT96                Type = 3
	Type_FLOAT                Type = 4
	Type_DOUBLE               Type = 5
	Type_BYTE_ARRAY           Type = 6
	Type_FIXED_LEN_BYTE_ARRAY Type = 7
)
var SchemaElement_Type_DEFAULT Type

func TypeFromString 

func TypeFromString(s string) (Type, error)

func TypePtr 

func TypePtr(v Type) *Type

func (Type) MarshalText 

func (p Type) MarshalText() ([]byte, error)

func (*Type) Scan 

func (p *Type) Scan(value interface{}) error

func (Type) String 

func (p Type) String() string

func (*Type) UnmarshalText 

func (p *Type) UnmarshalText(text []byte) error

func (*Type) Value 

func (p *Type) Value() (driver.Value, error)

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