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

Class DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer

java.lang.Object

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

All Implemented Interfaces:

SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

Direct Known Subclasses:

IgnoreNullFirstSelectFromWhereSerializer.SQLServerSQLRelationVisitingSerializer, MySQLSelectFromWhereSerializer.MySQLRelationVisitingSerializer

Enclosing class:

DefaultSelectFromWhereSerializer

protected static class DefaultSelectFromWhereSerializer.DefaultSQLRelationVisitingSerializer
extends Object
implements SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

Mutable: one instance per SQL query to generate

Field Summary

Fields

Modifier and Type	Field and Description
protected SQLDialectAdapter	dialectAdapter
protected QuotedIDFactory	idFactory
protected SQLTermSerializer	sqlTermSerializer
protected static String	VIEW_PREFIX

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected RelationID	generateFreshViewAlias()
protected String	serializeGroupBy(com.google.common.collect.ImmutableSet<it.unibz.inf.ontop.model.term.Variable> groupByVariables, com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap)
protected String	serializeOrderBy(com.google.common.collect.ImmutableList<SQLOrderComparator> sortConditions, com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap)
protected String	serializeProjection(com.google.common.collect.ImmutableSortedSet<it.unibz.inf.ontop.model.term.Variable> projectedVariables, com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> projectedColumnMap, it.unibz.inf.ontop.substitution.ImmutableSubstitution<? extends it.unibz.inf.ontop.model.term.ImmutableTerm> substitution, com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap)
protected SelectFromWhereSerializer.QuerySerialization	visit(BinaryJoinExpression binaryJoinExpression, String operatorString) NB: the systematic use of ON conditions for inner and left joins saves us from putting parentheses.
SelectFromWhereSerializer.QuerySerialization	visit(SelectFromWhereWithModifiers selectFromWhere)
SelectFromWhereSerializer.QuerySerialization	visit(SQLInnerJoinExpression sqlInnerJoinExpression)
SelectFromWhereSerializer.QuerySerialization	visit(SQLLeftJoinExpression sqlLeftJoinExpression)
SelectFromWhereSerializer.QuerySerialization	visit(SQLNaryJoinExpression sqlNaryJoinExpression)
SelectFromWhereSerializer.QuerySerialization	visit(SQLOneTupleDummyQueryExpression sqlOneTupleDummyQueryExpression)
SelectFromWhereSerializer.QuerySerialization	visit(SQLSerializedQuery sqlSerializedQuery)
SelectFromWhereSerializer.QuerySerialization	visit(SQLTable sqlTable)
SelectFromWhereSerializer.QuerySerialization	visit(SQLUnionExpression sqlUnionExpression)

Methods inherited from class java.lang.Object

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

Field Detail

VIEW_PREFIX

protected static final String VIEW_PREFIX

See Also:

Constant Field Values

sqlTermSerializer

protected final SQLTermSerializer sqlTermSerializer

dialectAdapter

protected final SQLDialectAdapter dialectAdapter

idFactory

protected final QuotedIDFactory idFactory

Constructor Detail

DefaultSQLRelationVisitingSerializer

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

Method Detail

visit

public SelectFromWhereSerializer.QuerySerialization visit(SelectFromWhereWithModifiers selectFromWhere)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

generateFreshViewAlias

protected RelationID generateFreshViewAlias()

serializeProjection

protected String serializeProjection(com.google.common.collect.ImmutableSortedSet<it.unibz.inf.ontop.model.term.Variable> projectedVariables,
                                     com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> projectedColumnMap,
                                     it.unibz.inf.ontop.substitution.ImmutableSubstitution<? extends it.unibz.inf.ontop.model.term.ImmutableTerm> substitution,
                                     com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap)

serializeGroupBy

protected String serializeGroupBy(com.google.common.collect.ImmutableSet<it.unibz.inf.ontop.model.term.Variable> groupByVariables,
                                  com.google.common.collect.ImmutableMap<it.unibz.inf.ontop.model.term.Variable,QualifiedAttributeID> fromColumnMap)

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)

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLSerializedQuery sqlSerializedQuery)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLTable sqlTable)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLNaryJoinExpression sqlNaryJoinExpression)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLUnionExpression sqlUnionExpression)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLInnerJoinExpression sqlInnerJoinExpression)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLLeftJoinExpression sqlLeftJoinExpression)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>

visit

protected SelectFromWhereSerializer.QuerySerialization visit(BinaryJoinExpression binaryJoinExpression,
                                                             String operatorString)

NB: the systematic use of ON conditions for inner and left joins saves us from putting parentheses. Indeed since a join expression with a ON is always "CHILD_1 SOME_JOIN CHILD_2 ON COND", the decomposition is unambiguous just following this pattern. For instance, "T1 LEFT JOIN T2 INNER JOIN T3 ON 1=1 ON 2=2" is clearly equivalent to "T1 LEFT JOIN (T2 INNER JOIN T3)" as the latest ON condition ("ON 2=2") can only be attached to the left join, which means that "T2 INNER JOIN T3 ON 1=1" is the right child of the left join.

visit

public SelectFromWhereSerializer.QuerySerialization visit(SQLOneTupleDummyQueryExpression sqlOneTupleDummyQueryExpression)

Specified by:

visit in interface SQLRelationVisitor<SelectFromWhereSerializer.QuerySerialization>