/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* 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.translator.hive;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.List;
import org.teiid.language.Call;
import org.teiid.language.Command;
import org.teiid.language.Insert;
import org.teiid.language.Limit;
import org.teiid.metadata.AggregateAttributes;
import org.teiid.metadata.FunctionMethod;
import org.teiid.metadata.RuntimeMetadata;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.TranslatorProperty;
import org.teiid.translator.TypeFacility;
import org.teiid.translator.jdbc.ConvertModifier;
import org.teiid.translator.jdbc.JDBCExecutionFactory;
import org.teiid.translator.jdbc.JDBCMetdataProcessor;
import org.teiid.translator.jdbc.JDBCUpdateExecution;
import org.teiid.translator.jdbc.SQLConversionVisitor;
public class BaseHiveExecutionFactory extends JDBCExecutionFactory {
protected ConvertModifier convert = new ConvertModifier();
protected boolean useDatabaseMetaData;
@Override
public JDBCUpdateExecution createUpdateExecution(Command command, ExecutionContext executionContext, RuntimeMetadata metadata, Connection conn)
throws TranslatorException {
if (command instanceof Insert) {
return new JDBCUpdateExecution(command, conn, executionContext, this);
}
throw new TranslatorException(HivePlugin.Event.TEIID24000, HivePlugin.Util.gs(HivePlugin.Event.TEIID24000, command));
}
@Override
public ProcedureExecution createProcedureExecution(Call command, ExecutionContext executionContext, RuntimeMetadata metadata, Connection conn)
throws TranslatorException {
throw new TranslatorException(HivePlugin.Event.TEIID24000, HivePlugin.Util.gs(HivePlugin.Event.TEIID24000, command));
}
@Override
public SQLConversionVisitor getSQLConversionVisitor() {
return new HiveSQLConversionVisitor(this);
}
@Override
public boolean useAnsiJoin() {
return true;
}
@Override
public boolean supportsCorrelatedSubqueries() {
//https://issues.apache.org/jira/browse/HIVE-784
return false;
}
@Override
public boolean supportsExistsCriteria() {
return false;
}
@Override
public boolean supportsInCriteriaSubquery() {
// the website documents a way to semi-join to re-write this but did not handle NOT IN case.
return false;
}
@Override
public boolean supportsLikeCriteriaEscapeCharacter() {
return false;
}
@Override
public boolean supportsQuantifiedCompareCriteriaAll() {
return false;
}
@Override
public boolean supportsQuantifiedCompareCriteriaSome() {
return false;
}
@Override
public boolean supportsBulkUpdate() {
return false;
}
@Override
public boolean supportsBatchedUpdates() {
return false;
}
@Override
public List<?> translateCommand(Command command, ExecutionContext context) {
return null;
}
@Override
public List<?> translateLimit(Limit limit, ExecutionContext context) {
return null;
}
@Override
public boolean addSourceComment() {
return false;
}
@Override
public boolean useAsInGroupAlias(){
return false;
}
@Override
public boolean hasTimeType() {
return false;
}
@Override
public String getLikeRegexString() {
return "REGEXP"; //$NON-NLS-1$
}
@Override
public boolean supportsScalarSubqueries() {
// Supported only in FROM clause
return false;
}
@Override
public boolean supportsInlineViews() {
// must be aliased.
return true;
}
@Override
public boolean supportsUnions() {
return true;
// only union all in subquery
}
@Override
public boolean supportsInsertWithQueryExpression() {
return false; // insert seems to be only with overwrite always
}
@Override
public boolean supportsIntersect() {
return false;
}
@Override
public boolean supportsExcept() {
return false;
}
@Override
public boolean supportsCommonTableExpressions() {
return false;
}
@Override
public boolean supportsRowLimit() {
return true;
}
@Override
public String translateLiteralBoolean(Boolean booleanValue) {
if(booleanValue.booleanValue()) {
return "true"; //$NON-NLS-1$
}
return "false"; //$NON-NLS-1$
}
@Override
public String translateLiteralTime(Time timeValue) {
if (!hasTimeType()) {
return translateLiteralTimestamp(new Timestamp(timeValue.getTime()));
}
return '\'' + formatDateValue(timeValue) + '\'';
}
@Override
public String translateLiteralTimestamp(Timestamp timestampValue) {
return "cast('" + formatDateValue(timestampValue) + "' as timestamp)"; //$NON-NLS-1$ //$NON-NLS-2$
}
@Deprecated
@Override
protected JDBCMetdataProcessor createMetadataProcessor() {
return getMetadataProcessor();
}
@Override
public JDBCMetdataProcessor getMetadataProcessor(){
HiveMetadataProcessor result = new HiveMetadataProcessor();
result.setUseDatabaseMetaData(this.useDatabaseMetaData);
return result;
}
@Override
public Object retrieveValue(ResultSet results, int columnIndex, Class<?> expectedType) throws SQLException {
// Calendar based getX not supported by Hive
if (expectedType.equals(Timestamp.class)) {
return results.getTimestamp(columnIndex);
}
if (expectedType.equals(Date.class)) {
return results.getDate(columnIndex);
}
if (expectedType.equals(Time.class)) {
return results.getTime(columnIndex);
}
try {
return super.retrieveValue(results, columnIndex, expectedType);
} catch (SQLException e) {
//impala for aggregate and other functions returns double, but bigdecimal is expected and the driver can't convert
return super.retrieveValue(results, columnIndex, TypeFacility.RUNTIME_TYPES.OBJECT);
}
}
@Override
public Object retrieveValue(CallableStatement results, int parameterIndex,
Class<?> expectedType) throws SQLException {
// Calendar based getX not supported by Hive
if (expectedType.equals(Timestamp.class)) {
return results.getTimestamp(parameterIndex);
}
if (expectedType.equals(Date.class)) {
return results.getDate(parameterIndex);
}
if (expectedType.equals(Time.class)) {
return results.getTime(parameterIndex);
}
try {
return super.retrieveValue(results, parameterIndex, expectedType);
} catch (SQLException e) {
//impala for aggregate and other functions returns double, but bigdecimal is expected and the driver can't convert
return super.retrieveValue(results, parameterIndex, TypeFacility.RUNTIME_TYPES.OBJECT);
}
}
@Override
public void bindValue(PreparedStatement stmt, Object param,
Class<?> paramType, int i) throws SQLException {
// Calendar based setX not supported by Hive
if (paramType.equals(Timestamp.class)) {
stmt.setTimestamp(i, (Timestamp) param);
}
if (paramType.equals(Date.class)) {
stmt.setDate(i, (Date) param);
}
if (paramType.equals(Time.class)) {
stmt.setTime(i, (Time) param);
}
super.bindValue(stmt, param, paramType, i);
}
protected FunctionMethod addAggregatePushDownFunction(String qualifier, String name, String returnType, String...paramTypes) {
FunctionMethod method = addPushDownFunction(qualifier, name, returnType, paramTypes);
AggregateAttributes attr = new AggregateAttributes();
attr.setAnalytic(true);
method.setAggregateAttributes(attr);
return method;
}
@Override
public boolean supportsHaving() {
return false; //only having with group by
}
@Override
public boolean supportsConvert(int fromType, int toType) {
if (!super.supportsConvert(fromType, toType)) {
return false;
}
if (convert.hasTypeMapping(toType)) {
return true;
}
return false;
}
@TranslatorProperty(display="Use DatabaseMetaData", description= "Use DatabaseMetaData (typical JDBC logic) for importing")
public boolean isUseDatabaseMetaData() {
return useDatabaseMetaData;
}
public void setUseDatabaseMetaData(boolean useDatabaseMetaData) {
this.useDatabaseMetaData = useDatabaseMetaData;
}
public boolean requiresLeftLinearJoin() {
return false;
}
@Override
public boolean supportsOrderByUnrelated() {
return false;
}
}