it.unibz.inf.ontop.answering.reformulation.generation.serializer.impl

Class MySQLSelectFromWhereSerializer.MySQLRelationVisitingSerializer

java.lang.Object

it.unibz.inf.ontop.answering.reformulation.generation.serializer.impl.DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer

it.unibz.inf.ontop.answering.reformulation.generation.serializer.impl.MySQLSelectFromWhereSerializer.MySQLRelationVisitingSerializer

All Implemented Interfaces:

SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

Enclosing class:

MySQLSelectFromWhereSerializer

protected static class MySQLSelectFromWhereSerializer.MySQLRelationVisitingSerializer
extends DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer

Field Summary

Fields inherited from class it.unibz.inf.ontop.answering.reformulation.generation.serializer.impl.DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer

dialectAdapter, idFactory, sqlTermSerializer, VIEW_PREFIX

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MySQLRelationVisitingSerializer(SQLTermSerializer sqlTermSerializer, SQLDialectAdapter dialectAdapter, QuotedIDFactory idFactory)

Method Summary

Modifier and Type	Method and Description
protected String	serializeOrderBy(com.google.common.collect.ImmutableList<SQLOrderComparator> sortConditions, com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap) MySQL seems to already treat NULLs as the lowest values Therefore it seems to follow the semantics of (ASC + NULLS FIRST) and (DESC + NULLS LAST) See http://sqlfiddle.com/#!9/255d2e/18

Methods inherited from class it.unibz.inf.ontop.answering.reformulation.generation.serializer.impl.DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer

generateFreshViewAlias, serializeGroupBy, serializeProjection, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MySQLRelationVisitingSerializer

protected MySQLRelationVisitingSerializer(SQLTermSerializer sqlTermSerializer,
                                          SQLDialectAdapter dialectAdapter,
                                          QuotedIDFactory idFactory)

Method Detail

serializeOrderBy

protected String serializeOrderBy(com.google.common.collect.ImmutableList<SQLOrderComparator> sortConditions,
                                  com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap)

MySQL seems to already treat NULLs as the lowest values Therefore it seems to follow the semantics of (ASC + NULLS FIRST) and (DESC + NULLS LAST) See http://sqlfiddle.com/#!9/255d2e/18

Overrides:

serializeOrderBy in class DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer