Examples with TableSource org.apache.flink.table.sources.TableSource used on opensource projects

Example 6 with TableSource

use of org.apache.flink.table.sources.TableSource in project flink by apache.

the class CatalogSchemaTable method findAndCreateTableSource.

private Optional<TableSource<?>> findAndCreateTableSource() {
    Optional<TableSource<?>> tableSource = Optional.empty();
    try {
        if (contextResolvedTable.getTable() instanceof CatalogTable) {
            // Use an empty config for TableSourceFactoryContextImpl since we can't fetch the
            // actual TableConfig here. And currently the empty config do not affect the logic.
            ReadableConfig config = new Configuration();
            TableSourceFactory.Context context = new TableSourceFactoryContextImpl(contextResolvedTable.getIdentifier(), contextResolvedTable.getTable(), config, contextResolvedTable.isTemporary());
            TableSource<?> source = TableFactoryUtil.findAndCreateTableSource(context);
            if (source instanceof StreamTableSource) {
                if (!isStreamingMode && !((StreamTableSource<?>) source).isBounded()) {
                    throw new ValidationException("Cannot query on an unbounded source in batch mode, but " + contextResolvedTable.getIdentifier().asSummaryString() + " is unbounded.");
                }
                tableSource = Optional.of(source);
            } else {
                throw new ValidationException("Catalog tables only support " + "StreamTableSource and InputFormatTableSource.");
            }
        }
    } catch (Exception e) {
        tableSource = Optional.empty();
    }
    return tableSource;
}