Examples with JSON_STRING org.apache.flink.table.functions.BuiltInFunctionDefinitions.JSON_STRING used on opensource projects

Example 1 with JSON_STRING

use of org.apache.flink.table.functions.BuiltInFunctionDefinitions.JSON_STRING in project flink by apache.

the class WrapJsonAggFunctionArgumentsRule method addProjections.

/**
 * Adds (wrapped) projections for affected arguments of the aggregation.
 *
 * <p>Note that we cannot override any of the projections as a field may be used multiple times,
 * and in particular outside of the aggregation call. Therefore, we explicitly add the wrapped
 * projection as an additional one.
 */
private void addProjections(RelOptCluster cluster, RelBuilder relBuilder, List<Integer> affectedArgs) {
    final BridgingSqlFunction operandToStringOperator = of(cluster, JSON_STRING);
    final List<RexNode> projects = new ArrayList<>();
    affectedArgs.stream().map(argIdx -> relBuilder.call(operandToStringOperator, relBuilder.field(argIdx))).forEach(projects::add);
    relBuilder.projectPlus(projects);
}