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offset_index.go
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package parquet
import (
"github.com/segmentio/parquet-go/format"
)
type OffsetIndex interface {
// NumPages returns the number of pages in the offset index.
NumPages() int
// Offset returns the offset starting from the beginning of the file for the
// page at the given index.
Offset(int) int64
// CompressedPageSize returns the size of the page at the given index
// (in bytes).
CompressedPageSize(int) int64
// FirstRowIndex returns the the first row in the page at the given index.
//
// The returned row index is based on the row group that the page belongs
// to, the first row has index zero.
FirstRowIndex(int) int64
}
type fileOffsetIndex format.OffsetIndex
func (i *fileOffsetIndex) NumPages() int {
return len(i.PageLocations)
}
func (i *fileOffsetIndex) Offset(j int) int64 {
return i.PageLocations[j].Offset
}
func (i *fileOffsetIndex) CompressedPageSize(j int) int64 {
return int64(i.PageLocations[j].CompressedPageSize)
}
func (i *fileOffsetIndex) FirstRowIndex(j int) int64 {
return i.PageLocations[j].FirstRowIndex
}
type emptyOffsetIndex struct{}
func (emptyOffsetIndex) NumPages() int { return 0 }
func (emptyOffsetIndex) Offset(int) int64 { return 0 }
func (emptyOffsetIndex) CompressedPageSize(int) int64 { return 0 }
func (emptyOffsetIndex) FirstRowIndex(int) int64 { return 0 }
type booleanOffsetIndex struct{ page *booleanPage }
func (i booleanOffsetIndex) NumPages() int { return 1 }
func (i booleanOffsetIndex) Offset(int) int64 { return 0 }
func (i booleanOffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i booleanOffsetIndex) FirstRowIndex(int) int64 { return 0 }
type int32OffsetIndex struct{ page *int32Page }
func (i int32OffsetIndex) NumPages() int { return 1 }
func (i int32OffsetIndex) Offset(int) int64 { return 0 }
func (i int32OffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i int32OffsetIndex) FirstRowIndex(int) int64 { return 0 }
type int64OffsetIndex struct{ page *int64Page }
func (i int64OffsetIndex) NumPages() int { return 1 }
func (i int64OffsetIndex) Offset(int) int64 { return 0 }
func (i int64OffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i int64OffsetIndex) FirstRowIndex(int) int64 { return 0 }
type int96OffsetIndex struct{ page *int96Page }
func (i int96OffsetIndex) NumPages() int { return 1 }
func (i int96OffsetIndex) Offset(int) int64 { return 0 }
func (i int96OffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i int96OffsetIndex) FirstRowIndex(int) int64 { return 0 }
type floatOffsetIndex struct{ page *floatPage }
func (i floatOffsetIndex) NumPages() int { return 1 }
func (i floatOffsetIndex) Offset(int) int64 { return 0 }
func (i floatOffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i floatOffsetIndex) FirstRowIndex(int) int64 { return 0 }
type doubleOffsetIndex struct{ page *doublePage }
func (i doubleOffsetIndex) NumPages() int { return 1 }
func (i doubleOffsetIndex) Offset(int) int64 { return 0 }
func (i doubleOffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i doubleOffsetIndex) FirstRowIndex(int) int64 { return 0 }
type byteArrayOffsetIndex struct{ page *byteArrayPage }
func (i byteArrayOffsetIndex) NumPages() int { return 1 }
func (i byteArrayOffsetIndex) Offset(int) int64 { return 0 }
func (i byteArrayOffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i byteArrayOffsetIndex) FirstRowIndex(int) int64 { return 0 }
type fixedLenByteArrayOffsetIndex struct{ page *fixedLenByteArrayPage }
func (i fixedLenByteArrayOffsetIndex) NumPages() int { return 1 }
func (i fixedLenByteArrayOffsetIndex) Offset(int) int64 { return 0 }
func (i fixedLenByteArrayOffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i fixedLenByteArrayOffsetIndex) FirstRowIndex(int) int64 { return 0 }
type uint32OffsetIndex struct{ page *uint32Page }
func (i uint32OffsetIndex) NumPages() int { return 1 }
func (i uint32OffsetIndex) Offset(int) int64 { return 0 }
func (i uint32OffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i uint32OffsetIndex) FirstRowIndex(int) int64 { return 0 }
type uint64OffsetIndex struct{ page *uint64Page }
func (i uint64OffsetIndex) NumPages() int { return 1 }
func (i uint64OffsetIndex) Offset(int) int64 { return 0 }
func (i uint64OffsetIndex) CompressedPageSize(int) int64 { return i.page.Size() }
func (i uint64OffsetIndex) FirstRowIndex(int) int64 { return 0 }