Package org.apache.parquet.format

Enum ColumnMetaData._Fields

java.lang.Object
java.lang.Enum<ColumnMetaData._Fields>
org.apache.parquet.format.ColumnMetaData._Fields
All Implemented Interfaces:
Serializable, Comparable<ColumnMetaData._Fields>, org.apache.thrift.TFieldIdEnum
Enclosing class:
ColumnMetaData
public static enum ColumnMetaData._Fields extends Enum<ColumnMetaData._Fields> implements org.apache.thrift.TFieldIdEnum
The set of fields this struct contains, along with convenience methods for finding and manipulating them.

  • Enum Constant Details

    • TYPE

      public static final ColumnMetaData._Fields TYPE
      Type of this column *
      See Also:

    • ENCODINGS

      public static final ColumnMetaData._Fields ENCODINGS
      Set of all encodings used for this column. The purpose is to validate whether we can decode those pages. *

    • PATH_IN_SCHEMA

      public static final ColumnMetaData._Fields PATH_IN_SCHEMA
      Path in schema *

    • CODEC

      public static final ColumnMetaData._Fields CODEC
      Compression codec *
      See Also:

    • NUM_VALUES

      public static final ColumnMetaData._Fields NUM_VALUES
      Number of values in this column *

    • TOTAL_UNCOMPRESSED_SIZE

      public static final ColumnMetaData._Fields TOTAL_UNCOMPRESSED_SIZE
      total byte size of all uncompressed pages in this column chunk (including the headers) *

    • TOTAL_COMPRESSED_SIZE

      public static final ColumnMetaData._Fields TOTAL_COMPRESSED_SIZE
      total byte size of all compressed, and potentially encrypted, pages in this column chunk (including the headers) *

    • KEY_VALUE_METADATA

      public static final ColumnMetaData._Fields KEY_VALUE_METADATA
      Optional key/value metadata *

    • DATA_PAGE_OFFSET

      public static final ColumnMetaData._Fields DATA_PAGE_OFFSET
      Byte offset from beginning of file to first data page *

    • INDEX_PAGE_OFFSET

      public static final ColumnMetaData._Fields INDEX_PAGE_OFFSET
      Byte offset from beginning of file to root index page *

    • DICTIONARY_PAGE_OFFSET

      public static final ColumnMetaData._Fields DICTIONARY_PAGE_OFFSET
      Byte offset from the beginning of file to first (only) dictionary page *

    • STATISTICS

      public static final ColumnMetaData._Fields STATISTICS
      optional statistics for this column chunk

    • ENCODING_STATS

      public static final ColumnMetaData._Fields ENCODING_STATS
      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 *

    • BLOOM_FILTER_OFFSET

      public static final ColumnMetaData._Fields BLOOM_FILTER_OFFSET
      Byte offset from beginning of file to Bloom filter data. *

    • BLOOM_FILTER_LENGTH

      public static final ColumnMetaData._Fields BLOOM_FILTER_LENGTH
      Size of Bloom filter data including the serialized header, in bytes. Added in 2.10 so readers may not read this field from old files and it can be obtained after the BloomFilterHeader has been deserialized. Writers should write this field so readers can read the bloom filter in a single I/O.

    • SIZE_STATISTICS

      public static final ColumnMetaData._Fields SIZE_STATISTICS
      Optional statistics to help estimate total memory when converted to in-memory representations. The histograms contained in these statistics can also be useful in some cases for more fine-grained nullability/list length filter pushdown.

    • GEOSPATIAL_STATISTICS

      public static final ColumnMetaData._Fields GEOSPATIAL_STATISTICS
      Optional statistics specific for Geometry and Geography logical types

  • Method Details

    • values

      public static ColumnMetaData._Fields[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared

    • valueOf

      public static ColumnMetaData._Fields valueOf(String name)
      Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null

    • findByThriftId

      public static ColumnMetaData._Fields findByThriftId(int fieldId)
      Find the _Fields constant that matches fieldId, or null if its not found.

    • findByThriftIdOrThrow

      public static ColumnMetaData._Fields findByThriftIdOrThrow(int fieldId)
      Find the _Fields constant that matches fieldId, throwing an exception if it is not found.

    • findByName

      public static ColumnMetaData._Fields findByName(String name)
      Find the _Fields constant that matches name, or null if its not found.

    • getThriftFieldId

      public short getThriftFieldId()
      Specified by:
      getThriftFieldId in interface org.apache.thrift.TFieldIdEnum

    • getFieldName

      public String getFieldName()
      Specified by:
      getFieldName in interface org.apache.thrift.TFieldIdEnum