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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
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*
* This library is distributed in the hope that it will be useful,
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
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package org.teiid.query.resolver.command;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.teiid.api.exception.query.QueryMetadataException;
import org.teiid.api.exception.query.QueryResolverException;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.types.DataTypeManager;
import org.teiid.core.util.Assertion;
import org.teiid.query.QueryPlugin;
import org.teiid.query.metadata.QueryMetadataInterface;
import org.teiid.query.metadata.TempMetadataAdapter;
import org.teiid.query.resolver.ProcedureContainerResolver;
import org.teiid.query.resolver.QueryResolver;
import org.teiid.query.resolver.VariableResolver;
import org.teiid.query.resolver.util.ResolverUtil;
import org.teiid.query.resolver.util.ResolverVisitor;
import org.teiid.query.sql.ProcedureReservedWords;
import org.teiid.query.sql.lang.Command;
import org.teiid.query.sql.lang.GroupContext;
import org.teiid.query.sql.lang.Insert;
import org.teiid.query.sql.lang.ProcedureContainer;
import org.teiid.query.sql.symbol.Constant;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.sql.symbol.Expression;
import org.teiid.query.sql.symbol.GroupSymbol;
import org.teiid.query.sql.symbol.Reference;
import org.teiid.query.sql.symbol.SingleElementSymbol;
/**
* This class knows how to expand and resolve INSERT commands.
*/
public class InsertResolver extends ProcedureContainerResolver implements VariableResolver {
/**
* Resolve an INSERT. Need to resolve elements, constants, types, etc.
* @see org.teiid.query.resolver.ProcedureContainerResolver#resolveProceduralCommand(org.teiid.query.sql.lang.Command, org.teiid.query.metadata.TempMetadataAdapter)
*/
public void resolveProceduralCommand(Command command, TempMetadataAdapter metadata)
throws QueryMetadataException, QueryResolverException, TeiidComponentException {
// Cast to known type
Insert insert = (Insert) command;
if (insert.getValues() != null) {
QueryResolver.resolveSubqueries(command, metadata, null);
//variables and values must be resolved separately to account for implicitly defined temp groups
resolveList(insert.getValues(), metadata, insert.getExternalGroupContexts(), null);
}
//resolve subquery if there
if(insert.getQueryExpression() != null) {
QueryResolver.setChildMetadata(insert.getQueryExpression(), command);
QueryResolver.resolveCommand(insert.getQueryExpression(), metadata.getMetadata(), false);
}
Set<GroupSymbol> groups = new HashSet<GroupSymbol>();
groups.add(insert.getGroup());
// resolve any functions in the values
List values = insert.getValues();
boolean usingQuery = insert.getQueryExpression() != null;
if (usingQuery) {
values = insert.getQueryExpression().getProjectedSymbols();
}
if (insert.getVariables().isEmpty()) {
if (insert.getGroup().isResolved()) {
List variables = ResolverUtil.resolveElementsInGroup(insert.getGroup(), metadata);
for (Iterator i = variables.iterator(); i.hasNext();) {
insert.addVariable((ElementSymbol)((ElementSymbol)i.next()).clone());
}
} else {
for (int i = 0; i < values.size(); i++) {
if (usingQuery) {
SingleElementSymbol ses = (SingleElementSymbol)values.get(i);
ElementSymbol es = new ElementSymbol(ses.getShortName());
es.setType(ses.getType());
insert.addVariable(es);
} else {
insert.addVariable(new ElementSymbol("expr" + i)); //$NON-NLS-1$
}
}
}
} else if (insert.getGroup().isResolved()) {
resolveVariables(metadata, insert, groups);
}
resolveTypes(insert, metadata, values, usingQuery);
if (!insert.getGroup().isResolved()) { //define the implicit temp group
if(insert.getQueryExpression() != null) {
ResolverUtil.resolveImplicitTempGroup(metadata, insert.getGroup(), insert.getQueryExpression().getProjectedSymbols());
}else {
ResolverUtil.resolveImplicitTempGroup(metadata, insert.getGroup(), insert.getVariables());
}
resolveVariables(metadata, insert, groups);
//ensure that the types match
resolveTypes(insert, metadata, values, usingQuery);
}
if (insert.getQueryExpression() != null && metadata.isVirtualGroup(insert.getGroup().getMetadataID())) {
List<Reference> references = new ArrayList<Reference>(insert.getVariables().size());
for (int i = 0; i < insert.getVariables().size(); i++) {
Reference ref = new Reference(i);
ref.setType(((ElementSymbol)insert.getVariables().get(i)).getType());
references.add(ref);
}
insert.setValues(references);
}
}
private void resolveVariables(TempMetadataAdapter metadata,
Insert insert,
Set<GroupSymbol> groups) throws TeiidComponentException,
QueryResolverException {
try {
resolveList(insert.getVariables(), metadata, null, groups);
} catch (QueryResolverException e) {
throw new QueryResolverException(e, QueryPlugin.Util.getString("ERR.015.012.0054", insert.getGroup(), e.getUnresolvedSymbols())); //$NON-NLS-1$
}
}
private void resolveList(Collection elements, TempMetadataAdapter metadata,
GroupContext externalGroups, Set<GroupSymbol> groups) throws TeiidComponentException,
QueryResolverException {
for (Iterator i = elements.iterator(); i.hasNext();) {
Expression expr = (Expression)i.next();
ResolverVisitor.resolveLanguageObject(expr, groups, externalGroups, metadata);
}
}
/**
* @param insert
* @param values
* @param usingQuery
* @throws QueryResolverException
*/
public void resolveTypes(Insert insert, TempMetadataAdapter metadata, List values, boolean usingQuery) throws QueryResolverException {
List newValues = new ArrayList(values.size());
// check that # of variables == # of values
if(values.size() != insert.getVariables().size()) {
throw new QueryResolverException("ERR.015.008.0010", QueryPlugin.Util.getString("ERR.015.008.0010", insert.getVariables().size(), values.size())); //$NON-NLS-1$ //$NON-NLS-2$
}
Iterator valueIter = values.iterator();
Iterator varIter = insert.getVariables().iterator();
while(valueIter.hasNext()) {
// Walk through both elements and expressions, which should match up
Expression expression = (Expression) valueIter.next();
ElementSymbol element = (ElementSymbol) varIter.next();
if (!usingQuery) {
ResolverUtil.setDesiredType(expression, element.getType(), insert);
}
if(element.getType() != null && expression.getType() != null) {
String elementTypeName = DataTypeManager.getDataTypeName(element.getType());
if (!usingQuery) {
newValues.add(ResolverUtil.convertExpression(expression, elementTypeName, metadata));
} else if (element.getType() != expression.getType()
&& !DataTypeManager.isImplicitConversion(DataTypeManager.getDataTypeName(expression.getType()),
DataTypeManager.getDataTypeName(element.getType()))) {
//TODO: a special case here is a projected literal
throw new QueryResolverException(QueryPlugin.Util.getString("InsertResolver.cant_convert_query_type", new Object[] {expression, expression.getType().getName(), element, element.getType().getName()})); //$NON-NLS-1$
}
} else if (element.getType() == null && expression.getType() != null && !usingQuery) {
element.setType(expression.getType());
newValues.add(expression);
} else {
Assertion.failed("Cannot determine element or expression type"); //$NON-NLS-1$
}
}
if (!usingQuery) {
insert.setValues(newValues);
}
}
/**
* @param metadata
* @param group
* @return
* @throws TeiidComponentException
* @throws QueryMetadataException
*/
protected String getPlan(QueryMetadataInterface metadata,
GroupSymbol group) throws TeiidComponentException,
QueryMetadataException {
return metadata.getInsertPlan(group.getMetadataID());
}
/**
* @see org.teiid.query.resolver.ProcedureContainerResolver#resolveGroup(org.teiid.query.metadata.TempMetadataAdapter, org.teiid.query.sql.lang.ProcedureContainer)
*/
protected void resolveGroup(TempMetadataAdapter metadata,
ProcedureContainer procCommand) throws TeiidComponentException,
QueryResolverException {
if (!procCommand.getGroup().isImplicitTempGroupSymbol() || metadata.getMetadataStore().getTempGroupID(procCommand.getGroup().getName()) != null) {
super.resolveGroup(metadata, procCommand);
}
}
/**
* @throws TeiidComponentException
* @throws QueryResolverException
* @throws QueryMetadataException
* @see org.teiid.query.resolver.CommandResolver#getVariableValues(org.teiid.query.sql.lang.Command, org.teiid.query.metadata.QueryMetadataInterface)
*/
public Map<ElementSymbol, Expression> getVariableValues(Command command, boolean changingOnly,
QueryMetadataInterface metadata) throws QueryMetadataException, QueryResolverException, TeiidComponentException {
Insert insert = (Insert) command;
Map<ElementSymbol, Expression> result = new HashMap<ElementSymbol, Expression>();
// iterate over the variables and values they should be the same number
Iterator<ElementSymbol> varIter = insert.getVariables().iterator();
Iterator valIter = null;
if (insert.getQueryExpression() != null) {
valIter = insert.getQueryExpression().getProjectedSymbols().iterator();
} else {
valIter = insert.getValues().iterator();
}
while (varIter.hasNext()) {
ElementSymbol varSymbol = varIter.next().clone();
varSymbol.getGroupSymbol().setName(ProcedureReservedWords.CHANGING);
result.put(varSymbol, new Constant(Boolean.TRUE));
if (!changingOnly) {
varSymbol = varSymbol.clone();
varSymbol.getGroupSymbol().setName(ProcedureReservedWords.INPUTS);
result.put(varSymbol, (Expression)valIter.next());
}
}
Collection<ElementSymbol> insertElmnts = ResolverUtil.resolveElementsInGroup(insert.getGroup(), metadata);
insertElmnts.removeAll(insert.getVariables());
Iterator<ElementSymbol> defaultIter = insertElmnts.iterator();
while(defaultIter.hasNext()) {
ElementSymbol varSymbol = defaultIter.next().clone();
varSymbol.getGroupSymbol().setName(ProcedureReservedWords.CHANGING);
result.put(varSymbol, new Constant(Boolean.FALSE));
if (!changingOnly) {
Expression value = ResolverUtil.getDefault(varSymbol, metadata);
varSymbol = varSymbol.clone();
varSymbol.getGroupSymbol().setName(ProcedureReservedWords.INPUTS);
result.put(varSymbol, value);
}
}
return result;
}
}