com.mysql.cj.xdevapi

Interface FetchResult<T>

Type Parameters:

T - the type of element returned from the query (doc or row)

All Superinterfaces:

java.lang.Iterable<T>, java.util.Iterator<T>

All Known Subinterfaces:

DocResult, RowResult, SqlResult

All Known Implementing Classes:

DocResultImpl, RowResultImpl, SqlMultiResult, SqlSingleResult, SqlUpdateResult

public interface FetchResult<T>
extends java.util.Iterator<T>, java.lang.Iterable<T>

A set of elements from a query command.

Method Summary

Modifier and Type	Method and Description
long	count() How many items are in this result? This method forces internal buffering of the entire result.
java.util.List<T>	fetchAll() Create a list of all elements in the result forcing internal buffering.
default T	fetchOne() Fetch the next element.
default boolean	hasData() Does this result have data? This indicates that the result was produced from a data-returning query.
default java.util.Iterator<T>	iterator() Create an iterator over all elements of the result.

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

hasData

default boolean hasData()

Does this result have data? This indicates that the result was produced from a data-returning query. It does not indicate whether there are more than 0 rows in the result.

Returns:

true if has data

fetchOne

default T fetchOne()

Fetch the next element.

Returns:

element of type T

iterator

default java.util.Iterator<T> iterator()

Create an iterator over all elements of the result.

Specified by:

iterator in interface java.lang.Iterable<T>

Returns:

iterator over result items

count

long count()

How many items are in this result? This method forces internal buffering of the entire result.

Returns:

number of elements in result

fetchAll

java.util.List<T> fetchAll()

Create a list of all elements in the result forcing internal buffering.

Returns:

list of result elements