public static List<AttributeRef> findTargetQueriedAttributesForExtTGD(Dependency dependency) {
List<AttributeRef> queriedAttributes = new ArrayList<AttributeRef>();
LunaticUtility.addAllIfNotContained(
queriedAttributes, findTargetQueriedAttributesInPremise(dependency));
for (FormulaVariable formulaVariable : dependency.getPremise().getLocalVariables()) {
if (formulaVariable.getConclusionRelationalOccurrences().isEmpty()) {
continue;
}
AttributeRef firstPremiseOccurrenceInTarget =
getFirstPremiseOccurrenceInTarget(formulaVariable.getPremiseRelationalOccurrences());
if (firstPremiseOccurrenceInTarget != null) {
AttributeRef unaliasedPremiseAttribute =
ChaseUtility.unAlias(firstPremiseOccurrenceInTarget);
LunaticUtility.addIfNotContained(queriedAttributes, unaliasedPremiseAttribute);
}
for (FormulaVariableOccurrence conclusionOccurrence :
formulaVariable.getConclusionRelationalOccurrences()) {
AttributeRef attribute = conclusionOccurrence.getAttributeRef();
if (attribute.getTableAlias().isSource()) {
continue;
}
AttributeRef unaliasedConclusionAttribute =
ChaseUtility.unAlias(conclusionOccurrence.getAttributeRef());
LunaticUtility.addIfNotContained(queriedAttributes, unaliasedConclusionAttribute);
}
}
return queriedAttributes;
}
private void addAdditionalAttributes(
CellGroup cellGroup, TupleOID originalOIDForConclusionValue, Tuple tuple, Dependency egd) {
for (AttributeRef additionalAttribute : egd.getAdditionalAttributes()) {
for (Cell additionalCell : tuple.getCells()) {
AttributeRef unaliasedAttribute = ChaseUtility.unAlias(additionalCell.getAttributeRef());
if (!unaliasedAttribute.equals(additionalAttribute)) {
continue;
}
TupleOID originalOIDForCell =
new TupleOID(ChaseUtility.getOriginalOid(tuple, additionalCell.getAttributeRef()));
if (!originalOIDForCell.equals(originalOIDForConclusionValue)) {
continue;
}
CellGroupCell additionalCellGroupCell =
new CellGroupCell(
originalOIDForCell,
unaliasedAttribute,
additionalCell.getValue(),
null,
LunaticConstants.TYPE_ADDITIONAL,
null);
cellGroup.addAdditionalCell(additionalAttribute, additionalCellGroupCell);
}
}
}
public static AttributeRef findFirstOccurrenceInFormula(
IFormula formula, List<FormulaVariableOccurrence> occurrences) {
List<TableAlias> aliasesInFormula =
AlgebraUtility.findAliasesForFormula(formula.getPositiveFormula());
for (FormulaVariableOccurrence occurrence : occurrences) {
AttributeRef attribute = occurrence.getAttributeRef();
if (aliasesInFormula.contains(attribute.getTableAlias())) {
return attribute;
}
}
return null;
}
public static List<AttributeRef> findTargetQueriedAttributesInPremise(Dependency dependency) {
if (logger.isTraceEnabled())
logger.trace("Searching query attributes for dependency: \n" + dependency);
List<AttributeRef> queriedAttributes = new ArrayList<AttributeRef>();
for (FormulaVariable variable : dependency.getPremise().getLocalVariables()) {
if (logger.isTraceEnabled()) logger.trace("Inspecting variable: " + variable);
if (hasSingleOccurrenceInPremise(variable)) {
continue;
}
for (FormulaVariableOccurrence occurrence : variable.getPremiseRelationalOccurrences()) {
if (logger.isTraceEnabled()) logger.trace("Inspecting occurrence: " + occurrence);
AttributeRef attribute = occurrence.getAttributeRef();
if (attribute.getTableAlias().isSource()) {
continue;
}
AttributeRef unaliasedAttribute = ChaseUtility.unAlias(attribute);
LunaticUtility.addIfNotContained(queriedAttributes, unaliasedAttribute);
}
}
if (logger.isTraceEnabled()) logger.trace("Result: " + queriedAttributes);
return queriedAttributes;
}
