Package com.databricks.jdbc.api.impl

Class LazyThriftResult

java.lang.Object

com.databricks.jdbc.api.impl.LazyThriftResult

All Implemented Interfaces:

IExecutionResult

public class LazyThriftResult
extends Object
implements IExecutionResult

Constructor Summary

Constructors

Constructor	Description
LazyThriftResult(TFetchResultsResp initialResponse, IDatabricksStatementInternal statement, IDatabricksSession session)	Creates a new LazyThriftResult that lazily fetches data on demand.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this result and releases associated resources.
long	getChunkCount()	Gets the chunk count.
long	getCurrentRow()	Gets the current row index (0-based).
Object	getObject(int columnIndex)	Gets the value at the specified column index for the current row.
long	getRowCount()	Gets the number of rows in the current batch.
long	getTotalRowsFetched()	Gets the total number of rows fetched from the server so far.
boolean	hasNext()	Checks if there are more rows available without advancing the cursor.
boolean	isCompletelyFetched()	Checks if all data has been fetched from the server.
boolean	next()	Moves the cursor to the next row.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LazyThriftResult

public LazyThriftResult(TFetchResultsResp initialResponse,
                        IDatabricksStatementInternal statement,
                        IDatabricksSession session)
                 throws DatabricksSQLException

Creates a new LazyThriftResult that lazily fetches data on demand.

Parameters:

initialResponse - the initial response from the server

statement - the statement that generated this result

session - the session to use for fetching additional data

Throws:

DatabricksSQLException - if the initial response cannot be processed

Method Detail

getObject

public Object getObject(int columnIndex)
                 throws DatabricksSQLException

Gets the value at the specified column index for the current row.

Specified by:

getObject in interface IExecutionResult

Parameters:

columnIndex - the zero-based column index

Returns:

the value at the specified column

Throws:

DatabricksSQLException - if the result is closed, cursor is invalid, or column index is out of bounds

getCurrentRow

public long getCurrentRow()

Gets the current row index (0-based). Returns -1 if before the first row.

Specified by:

getCurrentRow in interface IExecutionResult

Returns:

the current row index

next

public boolean next()
             throws DatabricksSQLException

Moves the cursor to the next row. Fetches additional data from server if needed.

Specified by:

next in interface IExecutionResult

Returns:

true if there is a next row, false if at the end

Throws:

DatabricksSQLException - if an error occurs while fetching data

hasNext

public boolean hasNext()

Checks if there are more rows available without advancing the cursor.

Specified by:

hasNext in interface IExecutionResult

Returns:

true if there are more rows, false otherwise

close

public void close()

Closes this result and releases associated resources.

Specified by:

close in interface IExecutionResult

getRowCount

public long getRowCount()

Gets the number of rows in the current batch.

Specified by:

getRowCount in interface IExecutionResult

Returns:

the number of rows in the current batch

getChunkCount

public long getChunkCount()

Gets the chunk count. Always returns 0 for thrift columnar results.

Specified by:

getChunkCount in interface IExecutionResult

Returns:

0 (thrift results don't use chunks like Arrow)

getTotalRowsFetched

public long getTotalRowsFetched()

Gets the total number of rows fetched from the server so far. This is different from getRowCount() which returns current batch size.

Returns:

the total number of rows fetched from the server

isCompletelyFetched

public boolean isCompletelyFetched()

Checks if all data has been fetched from the server.

Returns:

true if all data has been fetched (either reached end or maxRows limit)