com.hazelcast.org.apache.calcite.sql.ddl.SqlColumnDeclaration Maven / Gradle / Ivy
/*
* 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.ddl;
import com.hazelcast.org.apache.calcite.schema.ColumnStrategy;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlDataTypeSpec;
import com.hazelcast.org.apache.calcite.sql.SqlIdentifier;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
import com.hazelcast.org.apache.calcite.sql.SqlOperator;
import com.hazelcast.org.apache.calcite.sql.SqlSpecialOperator;
import com.hazelcast.org.apache.calcite.sql.SqlWriter;
import com.hazelcast.org.apache.calcite.sql.parser.SqlParserPos;
import com.hazelcast.com.google.common.collect.ImmutableList;
import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;
import java.util.List;
/**
* Parse tree for {@code UNIQUE}, {@code PRIMARY KEY} constraints.
*
* And {@code FOREIGN KEY}, when we support it.
*/
public class SqlColumnDeclaration extends SqlCall {
private static final SqlSpecialOperator OPERATOR =
new SqlSpecialOperator("COLUMN_DECL", SqlKind.COLUMN_DECL);
public final SqlIdentifier name;
public final SqlDataTypeSpec dataType;
public final @Nullable SqlNode expression;
public final ColumnStrategy strategy;
/** Creates a SqlColumnDeclaration; use {@link SqlDdlNodes#column}. */
SqlColumnDeclaration(SqlParserPos pos, SqlIdentifier name,
SqlDataTypeSpec dataType, @Nullable SqlNode expression,
ColumnStrategy strategy) {
super(pos);
this.name = name;
this.dataType = dataType;
this.expression = expression;
this.strategy = strategy;
}
@Override public SqlOperator getOperator() {
return OPERATOR;
}
@Override public List getOperandList() {
return ImmutableList.of(name, dataType);
}
@Override public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
name.unparse(writer, 0, 0);
dataType.unparse(writer, 0, 0);
if (Boolean.FALSE.equals(dataType.getNullable())) {
writer.keyword("NOT NULL");
}
SqlNode expression = this.expression;
if (expression != null) {
switch (strategy) {
case VIRTUAL:
case STORED:
writer.keyword("AS");
exp(writer, expression);
writer.keyword(strategy.name());
break;
case DEFAULT:
writer.keyword("DEFAULT");
exp(writer, expression);
break;
default:
throw new AssertionError("unexpected: " + strategy);
}
}
}
static void exp(SqlWriter writer, SqlNode expression) {
if (writer.isAlwaysUseParentheses()) {
expression.unparse(writer, 0, 0);
} else {
writer.sep("(");
expression.unparse(writer, 0, 0);
writer.sep(")");
}
}
}