/**
* NOTE: we specifically don't need to visit the as columns or the using identifiers. These will
* be resolved by the dynamic command resolver instead.
*
* @see LanguageVisitor#visit(org.teiid.query.sql.lang.DynamicCommand)
*/
@Override
public void visit(DynamicCommand obj) {
preVisitVisitor(obj);
visitNode(obj.getSql());
visitNode(obj.getIntoGroup());
if (obj.getUsing() != null) {
for (SetClause setClause : obj.getUsing().getClauses()) {
visitNode(setClause.getValue());
}
}
postVisitVisitor(obj);
}
/**
* @see org.teiid.query.resolver.CommandResolver#resolveCommand(org.teiid.query.sql.lang.Command,
* TempMetadataAdapter, boolean)
*/
@Override
public void resolveCommand(
Command command, TempMetadataAdapter metadata, boolean resolveNullLiterals) throws Exception {
DynamicCommand dynamicCmd = (DynamicCommand) command;
Iterator columns = dynamicCmd.getAsColumns().iterator();
Set<GroupSymbol> groups = new HashSet<GroupSymbol>();
// if there is no into group, just create temp metadata ids
if (dynamicCmd.getIntoGroup() == null) {
while (columns.hasNext()) {
ElementSymbol column = (ElementSymbol) columns.next();
column.setMetadataID(new TempMetadataID(column.getShortName(), column.getType()));
}
} else if (dynamicCmd.getIntoGroup().isTempGroupSymbol()) {
while (columns.hasNext()) {
ElementSymbol column = (ElementSymbol) columns.next();
GroupSymbol gs = getTeiidParser().createASTNode(ASTNodes.GROUP_SYMBOL);
gs.setName(dynamicCmd.getIntoGroup().getName());
column.setGroupSymbol(gs);
}
}
ResolverVisitor visitor = new ResolverVisitor(getTeiidParser().getVersion());
visitor.resolveLanguageObject(
dynamicCmd, groups, dynamicCmd.getExternalGroupContexts(), metadata);
String sqlType = getDataTypeManager().getDataTypeName(dynamicCmd.getSql().getType());
String targetType = DataTypeManagerService.DefaultDataTypes.STRING.getId();
if (!targetType.equals(sqlType)
&& !getDataTypeManager().isImplicitConversion(sqlType, targetType)) {
throw new QueryResolverException(Messages.gs(Messages.TEIID.TEIID30100, sqlType));
}
if (dynamicCmd.getUsing() != null && !dynamicCmd.getUsing().isEmpty()) {
for (SetClause clause : dynamicCmd.getUsing().getClauses()) {
ElementSymbol id = clause.getSymbol();
GroupSymbol gs = getTeiidParser().createASTNode(ASTNodes.GROUP_SYMBOL);
gs.setName(ProcedureReservedWords.DVARS);
id.setGroupSymbol(gs);
id.setType(clause.getValue().getType());
id.setMetadataID(new TempMetadataID(id.getName(), id.getType()));
}
}
GroupSymbol intoSymbol = dynamicCmd.getIntoGroup();
if (intoSymbol != null) {
if (!intoSymbol.isImplicitTempGroupSymbol()) {
ResolverUtil.resolveGroup(intoSymbol, metadata);
} else {
List symbols = dynamicCmd.getAsColumns();
ResolverUtil.resolveImplicitTempGroup(metadata, intoSymbol, symbols);
}
}
}
private void resolveStatement(
CreateProcedureCommand command,
Statement statement,
GroupContext externalGroups,
GroupSymbol variables,
TempMetadataAdapter metadata)
throws QueryResolverException, QueryMetadataException, TeiidComponentException {
LogManager.logTrace(
org.teiid.logging.LogConstants.CTX_QUERY_RESOLVER,
new Object[] {"Resolving statement", statement}); // $NON-NLS-1$
switch (statement.getType()) {
case Statement.TYPE_IF:
IfStatement ifStmt = (IfStatement) statement;
Criteria ifCrit = ifStmt.getCondition();
for (SubqueryContainer container :
ValueIteratorProviderCollectorVisitor.getValueIteratorProviders(ifCrit)) {
resolveEmbeddedCommand(metadata, externalGroups, container.getCommand());
}
ResolverVisitor.resolveLanguageObject(ifCrit, null, externalGroups, metadata);
resolveBlock(command, ifStmt.getIfBlock(), externalGroups, metadata);
if (ifStmt.hasElseBlock()) {
resolveBlock(command, ifStmt.getElseBlock(), externalGroups, metadata);
}
break;
case Statement.TYPE_COMMAND:
CommandStatement cmdStmt = (CommandStatement) statement;
Command subCommand = cmdStmt.getCommand();
TempMetadataStore discoveredMetadata =
resolveEmbeddedCommand(metadata, externalGroups, subCommand);
if (subCommand instanceof StoredProcedure) {
StoredProcedure sp = (StoredProcedure) subCommand;
for (SPParameter param : sp.getParameters()) {
switch (param.getParameterType()) {
case ParameterInfo.OUT:
case ParameterInfo.RETURN_VALUE:
if (param.getExpression() != null && !isAssignable(metadata, param)) {
throw new QueryResolverException(
QueryPlugin.Event.TEIID30121,
QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30121, param.getExpression()));
}
sp.setCallableStatement(true);
break;
case ParameterInfo.INOUT:
if (!isAssignable(metadata, param)) {
continue;
}
sp.setCallableStatement(true);
break;
}
}
}
if (discoveredMetadata != null) {
metadata.getMetadataStore().getData().putAll(discoveredMetadata.getData());
}
// dynamic commands need to be updated as to their implicitly expected projected symbols
if (subCommand instanceof DynamicCommand) {
DynamicCommand dynCommand = (DynamicCommand) subCommand;
if (dynCommand.getIntoGroup() == null && !dynCommand.isAsClauseSet()) {
if ((command.getResultSetColumns() != null && command.getResultSetColumns().isEmpty())
|| !cmdStmt.isReturnable()
|| command.getResultSetColumns() == null) {
// we're not interested in the resultset
dynCommand.setAsColumns(Collections.EMPTY_LIST);
} else {
// should match the procedure
dynCommand.setAsColumns(command.getResultSetColumns());
}
}
}
if (command.getResultSetColumns() == null
&& cmdStmt.isReturnable()
&& subCommand.returnsResultSet()
&& subCommand.getResultSetColumns() != null
&& !subCommand.getResultSetColumns().isEmpty()) {
command.setResultSetColumns(subCommand.getResultSetColumns());
if (command.getProjectedSymbols().isEmpty()) {
command.setProjectedSymbols(subCommand.getResultSetColumns());
}
}
break;
case Statement.TYPE_ERROR:
case Statement.TYPE_ASSIGNMENT:
case Statement.TYPE_DECLARE:
case Statement.TYPE_RETURN:
ExpressionStatement exprStmt = (ExpressionStatement) statement;
// first resolve the value. this ensures the value cannot use the variable being defined
if (exprStmt.getExpression() != null) {
Expression expr = exprStmt.getExpression();
for (SubqueryContainer container :
ValueIteratorProviderCollectorVisitor.getValueIteratorProviders(expr)) {
resolveEmbeddedCommand(metadata, externalGroups, container.getCommand());
}
ResolverVisitor.resolveLanguageObject(expr, null, externalGroups, metadata);
}
// second resolve the variable
switch (statement.getType()) {
case Statement.TYPE_DECLARE:
collectDeclareVariable(
(DeclareStatement) statement, variables, metadata, externalGroups);
break;
case Statement.TYPE_ASSIGNMENT:
AssignmentStatement assStmt = (AssignmentStatement) statement;
ResolverVisitor.resolveLanguageObject(
assStmt.getVariable(), null, externalGroups, metadata);
if (!metadata.elementSupports(
assStmt.getVariable().getMetadataID(), SupportConstants.Element.UPDATE)) {
throw new QueryResolverException(
QueryPlugin.Event.TEIID30121,
QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30121, assStmt.getVariable()));
}
// don't allow variable assignments to be external
assStmt.getVariable().setIsExternalReference(false);
break;
case Statement.TYPE_RETURN:
ReturnStatement rs = (ReturnStatement) statement;
if (rs.getExpression() != null) {
if (command.getReturnVariable() == null) {
throw new QueryResolverException(
QueryPlugin.Event.TEIID31125,
QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31125, rs));
}
rs.setVariable(command.getReturnVariable().clone());
}
// else - we don't currently require the use of return for backwards compatibility
break;
}
// third ensure the type matches
if (exprStmt.getExpression() != null) {
Class<?> varType = exprStmt.getExpectedType();
Class<?> exprType = exprStmt.getExpression().getType();
if (exprType == null) {
throw new QueryResolverException(
QueryPlugin.Event.TEIID30123, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30123));
}
String varTypeName = DataTypeManager.getDataTypeName(varType);
exprStmt.setExpression(
ResolverUtil.convertExpression(exprStmt.getExpression(), varTypeName, metadata));
if (statement.getType() == Statement.TYPE_ERROR) {
ResolverVisitor.checkException(exprStmt.getExpression());
}
}
break;
case Statement.TYPE_WHILE:
WhileStatement whileStmt = (WhileStatement) statement;
Criteria whileCrit = whileStmt.getCondition();
for (SubqueryContainer container :
ValueIteratorProviderCollectorVisitor.getValueIteratorProviders(whileCrit)) {
resolveEmbeddedCommand(metadata, externalGroups, container.getCommand());
}
ResolverVisitor.resolveLanguageObject(whileCrit, null, externalGroups, metadata);
resolveBlock(command, whileStmt.getBlock(), externalGroups, metadata);
break;
case Statement.TYPE_LOOP:
LoopStatement loopStmt = (LoopStatement) statement;
String groupName = loopStmt.getCursorName();
isValidGroup(metadata, groupName);
Command cmd = loopStmt.getCommand();
resolveEmbeddedCommand(metadata, externalGroups, cmd);
List<Expression> symbols = cmd.getProjectedSymbols();
// add the loop cursor group into its own context
TempMetadataStore store = metadata.getMetadataStore().clone();
metadata = new TempMetadataAdapter(metadata.getMetadata(), store);
externalGroups = new GroupContext(externalGroups, null);
ProcedureContainerResolver.addScalarGroup(groupName, store, externalGroups, symbols, false);
resolveBlock(command, loopStmt.getBlock(), externalGroups, metadata);
break;
case Statement.TYPE_COMPOUND:
resolveBlock(command, (Block) statement, externalGroups, metadata);
break;
}
}
