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* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* 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
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.resolver.command;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
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.metadata.Column;
import org.teiid.metadata.BaseColumn.NullType;
import org.teiid.query.QueryPlugin;
import org.teiid.query.metadata.TempMetadataAdapter;
import org.teiid.query.metadata.TempMetadataID;
import org.teiid.query.resolver.CommandResolver;
import org.teiid.query.resolver.util.ResolverUtil;
import org.teiid.query.resolver.util.ResolverVisitor;
import org.teiid.query.sql.lang.Command;
import org.teiid.query.sql.lang.Create;
import org.teiid.query.sql.lang.Drop;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.sql.symbol.GroupSymbol;
/**
* @since 5.5
*/
public class TempTableResolver implements CommandResolver {
/**
* @see org.teiid.query.resolver.CommandResolver#resolveCommand(org.teiid.query.sql.lang.Command, org.teiid.query.metadata.TempMetadataAdapter, boolean)
*/
public void resolveCommand(Command command, TempMetadataAdapter metadata, boolean resolveNullLiterals)
throws QueryMetadataException, QueryResolverException, TeiidComponentException {
if(command.getType() == Command.TYPE_CREATE) {
Create create = (Create)command;
GroupSymbol group = create.getTable();
//assuming that all temp table creates are local, the user must use a local name
if (group.getName().indexOf(ElementSymbol.SEPARATOR) != -1) {
throw new QueryResolverException(QueryPlugin.Util.getString("TempTableResolver.unqualified_name_required", group.getName())); //$NON-NLS-1$
}
//this will only check non-temp groups
Collection exitsingGroups = metadata.getMetadata().getGroupsForPartialName(group.getName());
if(!exitsingGroups.isEmpty()) {
throw new QueryResolverException(QueryPlugin.Util.getString("TempTableResolver.table_already_exists", group.getName())); //$NON-NLS-1$
}
if (metadata.getMetadata().hasProcedure(group.getName())) {
throw new QueryResolverException(QueryPlugin.Util.getString("TempTableResolver.table_already_exists", group.getName())); //$NON-NLS-1$
}
//now we will be more specific for temp groups
TempMetadataID id = metadata.getMetadataStore().getTempGroupID(group.getName());
if (id != null && !metadata.isTemporaryTable(id)) {
throw new QueryResolverException(QueryPlugin.Util.getString("TempTableResolver.table_already_exists", group.getName())); //$NON-NLS-1$
}
//if we get here then either the group does not exist or has already been defined as a temp table
//if it has been defined as a temp table, that's ok we'll use this as the new definition and throw an
//exception at runtime if the user has not dropped the previous table yet
TempMetadataID tempTable = ResolverUtil.addTempTable(metadata, group, create.getColumnSymbols());
ResolverUtil.resolveGroup(create.getTable(), metadata);
Set<GroupSymbol> groups = new HashSet<GroupSymbol>();
groups.add(create.getTable());
ResolverVisitor.resolveLanguageObject(command, groups, metadata);
addAdditionalMetadata(create, tempTable);
} else if(command.getType() == Command.TYPE_DROP) {
ResolverUtil.resolveGroup(((Drop)command).getTable(), metadata);
}
}
public static void addAdditionalMetadata(Create create, TempMetadataID tempTable) {
if (!create.getPrimaryKey().isEmpty()) {
ArrayList<TempMetadataID> primaryKey = new ArrayList<TempMetadataID>(create.getPrimaryKey().size());
for (ElementSymbol symbol : create.getPrimaryKey()) {
primaryKey.add((TempMetadataID) symbol.getMetadataID());
}
tempTable.setPrimaryKey(primaryKey);
}
for (int i = 0; i < create.getColumns().size(); i++) {
Column column = create.getColumns().get(i);
TempMetadataID tid = tempTable.getElements().get(i);
if (column.isAutoIncremented()) {
tid.setAutoIncrement(true);
}
if (column.getNullType() == NullType.No_Nulls) {
tid.setNotNull(true);
}
}
}
}