Class: ParquetTableData
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:11
Implements
TableData
Constructors
Constructor
new ParquetTableData(
ids,names,buffer,metadata):ParquetTableData
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:18
Parameters
ids
number[] | undefined
names
string[] | undefined
buffer
AsyncBuffer
metadata
FileMetaData
Returns
ParquetTableData
Methods
close()
close():
void
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:127
Releases all resources held by this data object
Returns
void
Implementation of
TableData.close
getIds()
getIds():
number[]
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:33
Returns an array of item IDs
Returns
number[]
Implementation of
TableData.getIds
getNames()
getNames():
string[] |undefined
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:45
Returns the item names if available, otherwise undefined
Returns
string[] | undefined
Implementation of
TableData.getNames
getSize()
getSize():
number
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:41
Returns the total number of items
Returns
number
Implementation of
TableData.getSize
loadUniqueValues()
loadUniqueValues<
T>(column,options?):Promise<GenericArray<T>>
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:87
Load a column's unique values as a typed array-like
Type Parameters
T
T
Element type of the returned array
Parameters
column
string
The column name
options?
Optional abort signal and progress callback
onProgress?
ProgressCallback
signal?
AbortSignal
Returns
Promise<GenericArray<T>>
The unique column values
Implementation of
TableData.loadUniqueValues
loadValueRange()
loadValueRange(
column,options?):Promise<[number,number] |undefined>
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:99
Load a column's minimum and maximum values
Parameters
column
string
The column name
options?
Optional abort signal and progress callback
onProgress?
ProgressCallback
signal?
AbortSignal
Returns
Promise<[number, number] | undefined>
The numeric [min, max] value range of the column, or undefined if not numeric
Implementation of
TableData.loadValueRange
loadValues()
loadValues<
T>(column,options?):Promise<GenericArray<T>>
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:71
Loads a column's values as a typed array-like
Type Parameters
T
T
Element type of the returned array
Parameters
column
string
The column name
options?
Optional abort signal and progress callback
onProgress?
ProgressCallback
signal?
AbortSignal
Returns
Promise<GenericArray<T>>
The column values
Implementation of
TableData.loadValues
resolveColumnQuery()
resolveColumnQuery(
query,options?):Promise<string|null>
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:61
Resolves a query to an exact column name
Parameters
query
string
The column query
options?
Optional abort signal
signal?
AbortSignal
Returns
Promise<string | null>
The resolved column name, or null if no match is found
Implementation of
TableData.resolveColumnQuery
suggestColumnQueries()
suggestColumnQueries(
currentQuery,options?):Promise<string[]>
Defined in: @tissuumaps-storage/src/parquet/ParquetTableData.ts:49
Returns column name suggestions matching the current query
Parameters
currentQuery
string
The partial column name to autocomplete
options?
Optional abort signal
signal?
AbortSignal
Returns
Promise<string[]>
A list of suggested column queries matching the current one
Implementation of
TableData.suggestColumnQueries