/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.phoenix.parse;
import java.sql.SQLException;
import java.text.Format;
import java.util.List;
import org.apache.phoenix.compile.StatementContext;
import org.apache.phoenix.expression.Expression;
import org.apache.phoenix.expression.LiteralExpression;
import org.apache.phoenix.expression.function.FunctionArgumentType;
import org.apache.phoenix.expression.function.FunctionExpression;
import org.apache.phoenix.expression.function.ToNumberFunction;
import org.apache.phoenix.schema.PDataType;
public class ToNumberParseNode extends FunctionParseNode {
ToNumberParseNode(String name, List<ParseNode> children,
BuiltInFunctionInfo info) {
super(name, children, info);
}
@Override
public FunctionExpression create(List<Expression> children, StatementContext context) throws SQLException {
PDataType dataType = children.get(0).getDataType();
String formatString = (String)((LiteralExpression)children.get(1)).getValue(); // either date or number format string
Format formatter = null;
FunctionArgumentType type;
if (dataType.isCoercibleTo(PDataType.TIMESTAMP)) {
if (formatString == null) {
formatString = context.getDateFormat();
formatter = context.getDateFormatter();
} else {
formatter = FunctionArgumentType.TEMPORAL.getFormatter(formatString);
}
type = FunctionArgumentType.TEMPORAL;
}
else if (dataType.isCoercibleTo(PDataType.CHAR)) {
if (formatString != null) {
formatter = FunctionArgumentType.CHAR.getFormatter(formatString);
}
type = FunctionArgumentType.CHAR;
}
else {
throw new SQLException(dataType + " type is unsupported for TO_NUMBER(). Numeric and temporal types are supported.");
}
return new ToNumberFunction(children, type, formatString, formatter);
}
}