public class SchemaUtil {
public static Schema merge(Schema left, Schema right) {
Schema merged = new Schema();
for(Column col : left.getColumns()) {
if (!merged.containsByQualifiedName(col.getQualifiedName())) {
merged.addColumn(col);
}
}
for(Column col : right.getColumns()) {
if (!merged.containsByQualifiedName(col.getQualifiedName())) {