ParquetFileIndex (Deedle) | Deedle

ParquetFileIndex Type

Namespace: Deedle.Parquet.Virtual.Sources
Assembly: Deedle.Parquet.dll
Base Type: obj
All Interfaces: IDisposable

Shared Parquet file handle: schema, row count, and lazily loaded column arrays. Column sources capture this instance so the file stays open for the virtual frame lifetime; dispose explicitly only for short-lived validation helpers.

Constructors

Constructor	Description
`ParquetFileIndex(path)` Full Usage: `ParquetFileIndex(path)` Parameters: path : `string` Returns: `ParquetFileIndex`	path : `string` Returns: `ParquetFileIndex`

Instance members

Instance member	Description
`this.DataFields` Full Usage: `this.DataFields` Returns: `DataField[]`	Returns: `DataField[]`
`this.FieldIndex` Full Usage: `this.FieldIndex` Parameters: name : `string` Returns: `int`	name : `string` Returns: `int`
`this.Length` Full Usage: `this.Length` Returns: `int64`	Returns: `int64`
`this.Path` Full Usage: `this.Path` Returns: `string`	Returns: `string`
`this.ReadDateTimeOffsetColumn` Full Usage: `this.ReadDateTimeOffsetColumn` Parameters: name : `string` Returns: `OptionalValue<DateTimeOffset>[]`	Index helper: accepts DateTime or DateTimeOffset cells. name : `string` Returns: `OptionalValue<DateTimeOffset>[]`
`this.ReadFloatColumn` Full Usage: `this.ReadFloatColumn` Parameters: name : `string` Returns: `OptionalValue<float>[]`	Float column (nulls → Missing). Kept as a named alias for benchmarks/tests. name : `string` Returns: `OptionalValue<float>[]`
`this.ReadTypedColumn` Full Usage: `this.ReadTypedColumn` Parameters: name : `string` Returns: `OptionalValue<'T>[]` Type parameters: 'T	Exact CLR type from `readColumn` (no widening/narrowing). name : `string` Returns: `OptionalValue<'T>[]`