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/*
* 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 com.hazelcast.org.apache.calcite.sql.fun;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.sql.SqlBinaryOperator;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlCallBinding;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlOperandCountRange;
import com.hazelcast.org.apache.calcite.sql.SqlUtil;
import com.hazelcast.org.apache.calcite.sql.SqlWriter;
import com.hazelcast.org.apache.calcite.sql.type.InferTypes;
import com.hazelcast.org.apache.calcite.sql.type.OperandTypes;
import com.hazelcast.org.apache.calcite.sql.type.ReturnTypes;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandCountRanges;
import com.hazelcast.org.apache.calcite.sql.type.SqlSingleOperandTypeChecker;
import com.hazelcast.org.apache.calcite.sql.type.SqlTypeUtil;
import com.hazelcast.com.google.common.collect.ImmutableList;
/**
* SqlOverlapsOperator represents the SQL:1999 standard {@code OVERLAPS}
* function. Determines whether two anchored time intervals overlap.
*/
public class SqlOverlapsOperator extends SqlBinaryOperator {
//~ Constructors -----------------------------------------------------------
SqlOverlapsOperator(SqlKind kind) {
super(kind.sql, kind, 30, true, ReturnTypes.BOOLEAN_NULLABLE,
InferTypes.FIRST_KNOWN,
OperandTypes.sequence("' " + kind.sql + " '",
OperandTypes.PERIOD, OperandTypes.PERIOD));
}
//~ Methods ----------------------------------------------------------------
@Override public void unparse(SqlWriter writer, SqlCall call, int leftPrec,
int rightPrec) {
final SqlWriter.Frame frame =
writer.startList(SqlWriter.FrameTypeEnum.SIMPLE);
arg(writer, call, leftPrec, rightPrec, 0);
writer.sep(getName());
arg(writer, call, leftPrec, rightPrec, 1);
writer.endList(frame);
}
void arg(SqlWriter writer, SqlCall call, int leftPrec, int rightPrec, int i) {
if (SqlUtil.isCallTo(call.operand(i), SqlStdOperatorTable.ROW)) {
SqlCall row = call.operand(i);
writer.keyword("PERIOD");
writer.sep("(", true);
row.operand(0).unparse(writer, leftPrec, rightPrec);
writer.sep(",", true);
row.operand(1).unparse(writer, leftPrec, rightPrec);
writer.sep(")", true);
} else {
call.operand(i).unparse(writer, leftPrec, rightPrec);
}
}
public SqlOperandCountRange getOperandCountRange() {
return SqlOperandCountRanges.of(2);
}
public String getAllowedSignatures(String opName) {
final String d = "DATETIME";
final String i = "INTERVAL";
String[] typeNames = {
d, d,
d, i,
i, d,
i, i
};
StringBuilder ret = new StringBuilder();
for (int y = 0; y < typeNames.length; y += 2) {
if (y > 0) {
ret.append(NL);
}
ret.append(
SqlUtil.getAliasedSignature(this, opName,
ImmutableList.of(d, typeNames[y], d, typeNames[y + 1])));
}
return ret.toString();
}
public boolean checkOperandTypes(SqlCallBinding callBinding,
boolean throwOnFailure) {
if (!OperandTypes.PERIOD.checkSingleOperandType(callBinding,
callBinding.operand(0), 0, throwOnFailure)) {
return false;
}
final SqlSingleOperandTypeChecker rightChecker;
switch (kind) {
case CONTAINS:
rightChecker = OperandTypes.PERIOD_OR_DATETIME;
break;
default:
rightChecker = OperandTypes.PERIOD;
break;
}
if (!rightChecker.checkSingleOperandType(callBinding,
callBinding.operand(1), 0, throwOnFailure)) {
return false;
}
final RelDataType t0 = callBinding.getOperandType(0);
final RelDataType t1 = callBinding.getOperandType(1);
if (!SqlTypeUtil.isDatetime(t1)) {
final RelDataType t00 = t0.getFieldList().get(0).getType();
final RelDataType t10 = t1.getFieldList().get(0).getType();
if (!SqlTypeUtil.sameNamedType(t00, t10)) {
if (throwOnFailure) {
throw callBinding.newValidationSignatureError();
}
return false;
}
}
return true;
}
}