Examples with SortQueryOperation org.apache.flink.table.operations.SortQueryOperation used on opensource projects

Example 1 with SortQueryOperation

use of org.apache.flink.table.operations.SortQueryOperation in project flink by apache.

the class SortOperationFactory method createLimitWithFetch.

/**
 * Creates a valid {@link SortQueryOperation} with fetch (possibly merged into a preceding
 * {@link SortQueryOperation}).
 *
 * @param fetch fetch to limit
 * @param child relational expression on top of which to apply the sort operation
 * @param postResolverFactory factory for creating resolved expressions
 * @return valid sort operation with applied offset
 */
QueryOperation createLimitWithFetch(int fetch, QueryOperation child, PostResolverFactory postResolverFactory) {
    SortQueryOperation previousSort = validateAndGetChildSort(child, postResolverFactory);
    if (fetch < 0) {
        throw new ValidationException("Fetch should be greater or equal 0");
    }
    int offset = Math.max(previousSort.getOffset(), 0);
    return new SortQueryOperation(previousSort.getOrder(), previousSort.getChild(), offset, fetch);
}