org.h2.table.TableValueConstructorTable Maven / Gradle / Ivy
/*
* Copyright 2004-2019 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.table;
import java.util.ArrayList;
import org.h2.command.dml.TableValueConstructor;
import org.h2.engine.Session;
import org.h2.expression.Expression;
import org.h2.result.ResultInterface;
import org.h2.result.SimpleResult;
import org.h2.schema.Schema;
/**
* A table for table value constructor.
*/
public class TableValueConstructorTable extends VirtualConstructedTable {
private final ArrayList> rows;
public TableValueConstructorTable(Schema schema, Session session, Column[] columns,
ArrayList> rows) {
super(schema, 0, "VALUES");
setColumns(columns);
this.rows = rows;
}
@Override
public boolean canGetRowCount() {
return true;
}
@Override
public long getRowCount(Session session) {
return rows.size();
}
@Override
public long getRowCountApproximation() {
return rows.size();
}
@Override
public ResultInterface getResult(Session session) {
SimpleResult simple = new SimpleResult();
int columnCount = columns.length;
for (int i = 0; i < columnCount; i++) {
Column column = columns[i];
String name = column.getName();
simple.addColumn(name, name, column.getType());
}
TableValueConstructor.getVisibleResult(session, simple, columns, rows);
return simple;
}
@Override
public StringBuilder getSQL(StringBuilder builder, boolean alwaysQuote) {
builder.append('(');
TableValueConstructor.getValuesSQL(builder, alwaysQuote, rows);
return builder.append(')');
}
@Override
public boolean isDeterministic() {
return true;
}
}