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*
* This library is free software; you can redistribute it and/or
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*
* This library is distributed in the hope that it will be useful,
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* 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.QueryResolverException;
import org.teiid.core.types.DataTypeManagerService;
import org.teiid.core.util.ArgCheck;
import org.teiid.designer.query.metadata.IQueryMetadataInterface;
import org.teiid.language.SQLConstants;
import org.teiid.query.metadata.TempMetadataAdapter;
import org.teiid.query.parser.TeiidNodeFactory;
import org.teiid.query.parser.TeiidNodeFactory.ASTNodes;
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.Symbol;
import org.teiid.query.sql.util.SymbolMap;
import org.teiid.runtime.client.Messages;
/**
* This class knows how to expand and resolve INSERT commands.
*/
public class InsertResolver extends ProcedureContainerResolver implements VariableResolver {
/**
* @param queryResolver
*/
public InsertResolver(QueryResolver queryResolver) {
super(queryResolver);
}
/**
* 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)
*/
@Override
public void resolveProceduralCommand(Command command, TempMetadataAdapter metadata)
throws Exception {
// Cast to known type
Insert insert = (Insert) command;
if (insert.getValues() != null) {
getQueryResolver().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) {
getQueryResolver().setChildMetadata(insert.getQueryExpression(), command);
getQueryResolver().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<ElementSymbol> variables = ResolverUtil.resolveElementsInGroup(insert.getGroup(), metadata);
for (Iterator<ElementSymbol> i = variables.iterator(); i.hasNext();) {
insert.addVariable(i.next().clone());
}
} else {
for (int i = 0; i < values.size(); i++) {
ElementSymbol es = createASTNode(ASTNodes.ELEMENT_SYMBOL);
if (usingQuery) {
Expression ses = (Expression)values.get(i);
es.setName(Symbol.getShortName(ses));
es.setType(ses.getType());
insert.addVariable(es);
} else {
es.setName("expr" + i); //$NON-NLS-1$
insert.addVariable(es);
}
}
}
} else if (insert.getGroup().isResolved()) {
resolveVariables(metadata, insert, groups);
}
resolveTypes(insert, metadata, values, usingQuery);
if (!insert.getGroup().isResolved()) { //define the implicit temp group
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 = TeiidNodeFactory.createASTNode(getTeiidVersion(), ASTNodes.REFERENCE);
ref.setIndex(i);
ref.setPositional(true);
ref.setType(insert.getVariables().get(i).getType());
references.add(ref);
}
insert.setValues(references);
}
}
private void resolveVariables(TempMetadataAdapter metadata,
Insert insert,
Set<GroupSymbol> groups) throws Exception {
try {
resolveList(insert.getVariables(), metadata, null, groups);
} catch (QueryResolverException e) {
throw new QueryResolverException(Messages.gs(Messages.TEIID.TEIID30126, insert.getGroup(), e.getUnresolvedSymbols()));
}
}
private void resolveList(Collection<? extends Expression> elements, TempMetadataAdapter metadata,
GroupContext externalGroups, Set<GroupSymbol> groups) throws QueryResolverException, Exception {
if (elements == null || elements.isEmpty())
return;
ResolverVisitor visitor = new ResolverVisitor(elements.iterator().next().getTeiidVersion());
for (Iterator<? extends Expression> i = elements.iterator(); i.hasNext();) {
Expression expr = i.next();
visitor.resolveLanguageObject(expr, groups, externalGroups, metadata);
}
}
/**
* @param insert
* @param metadata
* @param values
* @param usingQuery
* @throws Exception
*/
public void resolveTypes(Insert insert, TempMetadataAdapter metadata, List values, boolean usingQuery) throws Exception {
List newValues = new ArrayList(values.size());
// check that # of variables == # of values
if(values.size() != insert.getVariables().size()) {
throw new QueryResolverException(Messages.gs(Messages.TEIID.TEIID30127, insert.getVariables().size(), values.size()));
}
Iterator valueIter = values.iterator();
Iterator<ElementSymbol> varIter = insert.getVariables().iterator();
while(valueIter.hasNext()) {
// Walk through both elements and expressions, which should match up
Expression expression = (Expression) valueIter.next();
ElementSymbol element = varIter.next();
if (expression.getType() == null) {
ResolverUtil.setDesiredType(SymbolMap.getExpression(expression), element.getType(), insert);
}
if(element.getType() != null && expression.getType() != null) {
String elementTypeName = getDataTypeManager().getDataTypeName(element.getType());
if (!usingQuery) {
newValues.add(ResolverUtil.convertExpression(expression, elementTypeName, metadata));
} else if (element.getType() != expression.getType()
&& !getDataTypeManager().isImplicitConversion(getDataTypeManager().getDataTypeName(expression.getType()),
getDataTypeManager().getDataTypeName(element.getType()))) {
//TODO: a special case here is a projected literal
throw new QueryResolverException(Messages.gs(Messages.TEIID.TEIID30128, new Object[] {expression, expression.getType().getName(), element, element.getType().getName()}));
}
} else if (element.getType() == null && expression.getType() != null) {
element.setType(expression.getType());
newValues.add(expression);
} else {
ArgCheck.isTrue(false,"Cannot determine element or expression type"); //$NON-NLS-1$
}
}
if (!usingQuery) {
insert.setValues(newValues);
}
}
/**
* @param metadata
* @param group
* @return
* @throws Exception
* @throws Exception
*/
@Override
protected String getPlan(IQueryMetadataInterface metadata,
GroupSymbol group) throws Exception {
return metadata.getInsertPlan(group.getMetadataID());
}
/**
* @see org.teiid.query.resolver.ProcedureContainerResolver#resolveGroup(org.teiid.query.metadata.TempMetadataAdapter, org.teiid.query.sql.lang.ProcedureContainer)
*/
@Override
protected void resolveGroup(TempMetadataAdapter metadata,
ProcedureContainer procCommand) throws Exception {
if (!procCommand.getGroup().isImplicitTempGroupSymbol() || metadata.getMetadataStore().getTempGroupID(procCommand.getGroup().getName()) != null) {
super.resolveGroup(metadata, procCommand);
}
}
/**
* @throws Exception
*/
@Override
public Map<ElementSymbol, Expression> getVariableValues(Command command, boolean changingOnly,
IQueryMetadataInterface metadata) throws Exception {
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 next = varIter.next();
ElementSymbol varSymbol = next.clone();
varSymbol.getGroupSymbol().setName(ProcedureReservedWords.CHANGING);
varSymbol.setType(DataTypeManagerService.DefaultDataTypes.BOOLEAN.getTypeClass());
Constant constant = createASTNode(ASTNodes.CONSTANT);
constant.setValue(Boolean.TRUE);
if (!changingOnly) {
varSymbol = next.clone();
varSymbol.getGroupSymbol().setName(SQLConstants.Reserved.NEW);
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 next = defaultIter.next();
ElementSymbol varSymbol = next.clone();
varSymbol.getGroupSymbol().setName(ProcedureReservedWords.CHANGING);
varSymbol.setType(DataTypeManagerService.DefaultDataTypes.BOOLEAN.getTypeClass());
Constant constant = TeiidNodeFactory.createASTNode(getTeiidVersion(), ASTNodes.CONSTANT);
constant.setValue(Boolean.FALSE);
result.put(varSymbol, constant);
if (!changingOnly) {
varSymbol = next.clone();
Expression value = ResolverUtil.getDefault(varSymbol, metadata);
varSymbol.getGroupSymbol().setName(SQLConstants.Reserved.NEW);
result.put(varSymbol, value);
}
}
return result;
}
}