com.datastax.oss.driver.api.core.metadata.schema.ViewMetadata Maven / Gradle / Ivy
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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.datastax.oss.driver.api.core.metadata.schema;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.internal.core.metadata.schema.ScriptBuilder;
import com.datastax.oss.driver.internal.core.metadata.schema.parsing.RelationParser;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.util.Optional;
/** A materialized view in the schema metadata. */
public interface ViewMetadata extends RelationMetadata {
/** The table that this view is based on. */
@NonNull
CqlIdentifier getBaseTable();
/**
* Whether this view does a {@code SELECT *} on its base table (this only affects the output of
* {@link #describe(boolean)}).
*/
boolean includesAllColumns();
@NonNull
Optional getWhereClause();
@NonNull
@Override
default String describe(boolean pretty) {
ScriptBuilder builder =
new ScriptBuilder(pretty)
.append("CREATE MATERIALIZED VIEW ")
.append(getKeyspace())
.append(".")
.append(getName())
.append(" AS")
.newLine();
builder.append("SELECT");
if (includesAllColumns()) {
builder.append(" * ");
} else {
builder.newLine().increaseIndent();
boolean first = true;
for (ColumnMetadata column : getColumns().values()) {
if (first) {
first = false;
} else {
builder.append(",").newLine();
}
builder.append(column.getName());
}
builder.newLine().decreaseIndent();
}
builder.append("FROM ").append(getKeyspace()).append(".").append(getBaseTable());
Optional whereClause = getWhereClause();
if (whereClause.isPresent() && !whereClause.get().isEmpty()) {
builder.newLine().append("WHERE ").append(whereClause.get());
}
builder.newLine().append("PRIMARY KEY (");
if (getPartitionKey().size() == 1) { // PRIMARY KEY (k
builder.append(getPartitionKey().get(0).getName());
} else { // PRIMARY KEY ((k1, k2)
builder.append("(");
boolean first = true;
for (ColumnMetadata pkColumn : getPartitionKey()) {
if (first) {
first = false;
} else {
builder.append(", ");
}
builder.append(pkColumn.getName());
}
builder.append(")");
}
// PRIMARY KEY (, cc1, cc2, cc3)
for (ColumnMetadata clusteringColumn : getClusteringColumns().keySet()) {
builder.append(", ").append(clusteringColumn.getName());
}
builder.append(")").increaseIndent();
RelationParser.appendOptions(getOptions(), builder);
return builder.append(";").build();
}
@NonNull
@Override
default String describeWithChildren(boolean pretty) {
return describe(pretty); // A view has no children
}
}