Package 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 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.lang.Iterable

    forEach, spliterator

    Methods inherited from interface java.util.Iterator

    forEachRemaining, hasNext, next, remove

  • Method Details

    • 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