Examples with ColumnHandle io.prestosql.spi.connector.ColumnHandle used on opensource projects

Example 1 with ColumnHandle

use of io.prestosql.spi.connector.ColumnHandle in project carbondata by apache.

the class CarbondataPageSource method getCarbonProjection.

/**
 * @param columns
 * @return
 */
private CarbonProjection getCarbonProjection(List<? extends ColumnHandle> columns) {
    CarbonProjection carbonProjection = new CarbonProjection();
    // Convert all columns handles
    ImmutableList.Builder<HiveColumnHandle> handles = ImmutableList.builder();
    for (ColumnHandle handle : columns) {
        handles.add(Types.checkType(handle, HiveColumnHandle.class, "handle"));
        carbonProjection.addColumn(((HiveColumnHandle) handle).getName());
    }
    return carbonProjection;
}