com.hazelcast.jet.sql.impl.validate.operators.string.HazelcastStringFunction Maven / Gradle / Ivy
/*
* Copyright 2021 Hazelcast Inc.
*
* Licensed under the Hazelcast Community License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://hazelcast.com/hazelcast-community-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.jet.sql.impl.validate.operators.string;
import com.hazelcast.jet.sql.impl.validate.HazelcastCallBinding;
import com.hazelcast.jet.sql.impl.validate.operand.TypedOperandChecker;
import com.hazelcast.jet.sql.impl.validate.operators.typeinference.ReplaceUnknownOperandTypeInference;
import com.hazelcast.jet.sql.impl.validate.operators.common.HazelcastFunction;
import com.hazelcast.org.apache.calcite.sql.SqlFunction;
import com.hazelcast.org.apache.calcite.sql.SqlFunctionCategory;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlOperandCountRange;
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.SqlReturnTypeInference;
import static com.hazelcast.org.apache.calcite.sql.type.SqlTypeName.VARCHAR;
public final class HazelcastStringFunction extends HazelcastFunction {
public static final SqlFunction ASCII = HazelcastStringFunction.withIntegerReturn("ASCII");
public static final SqlFunction INITCAP = HazelcastStringFunction.withStringReturn("INITCAP");
public static final SqlFunction CHAR_LENGTH = HazelcastStringFunction.withIntegerReturn("CHAR_LENGTH");
public static final SqlFunction CHARACTER_LENGTH = HazelcastStringFunction.withIntegerReturn("CHARACTER_LENGTH");
public static final SqlFunction LENGTH = HazelcastStringFunction.withIntegerReturn("LENGTH");
public static final SqlFunction LOWER = HazelcastStringFunction.withStringReturn("LOWER");
public static final SqlFunction UPPER = HazelcastStringFunction.withStringReturn("UPPER");
public static final SqlFunction RTRIM = HazelcastStringFunction.withStringReturn("RTRIM");
public static final SqlFunction LTRIM = HazelcastStringFunction.withStringReturn("LTRIM");
public static final SqlFunction BTRIM = HazelcastStringFunction.withStringReturn("BTRIM");
private HazelcastStringFunction(String name, SqlReturnTypeInference returnTypeInference) {
super(
name,
SqlKind.OTHER_FUNCTION,
returnTypeInference,
new ReplaceUnknownOperandTypeInference(VARCHAR),
SqlFunctionCategory.STRING
);
}
@Override
public SqlOperandCountRange getOperandCountRange() {
return SqlOperandCountRanges.of(1);
}
@Override
public boolean checkOperandTypes(HazelcastCallBinding callBinding, boolean throwOnFailure) {
return TypedOperandChecker.VARCHAR.check(callBinding, throwOnFailure, 0);
}
private static HazelcastStringFunction withStringReturn(String name) {
return new HazelcastStringFunction(name, ReturnTypes.ARG0_NULLABLE);
}
private static HazelcastStringFunction withIntegerReturn(String name) {
return new HazelcastStringFunction(name, ReturnTypes.INTEGER_NULLABLE);
}
}