/*
* Copyright 2004-2023 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.mode;
import org.h2.command.dml.Update;
import org.h2.engine.SessionLocal;
import org.h2.expression.ExpressionVisitor;
import org.h2.expression.Operation0;
import org.h2.message.DbException;
import org.h2.table.Column;
import org.h2.value.TypeInfo;
import org.h2.value.Value;
/**
* VALUES(column) function for ON DUPLICATE KEY UPDATE clause.
*/
public final class OnDuplicateKeyValues extends Operation0 {
private final Column column;
private final Update update;
public OnDuplicateKeyValues(Column column, Update update) {
this.column = column;
this.update = update;
}
@Override
public Value getValue(SessionLocal session) {
Value v = update.getOnDuplicateKeyInsert().getOnDuplicateKeyValue(column.getColumnId());
if (v == null) {
throw DbException.getUnsupportedException(getTraceSQL());
}
return v;
}
@Override
public StringBuilder getUnenclosedSQL(StringBuilder builder, int sqlFlags) {
return column.getSQL(builder.append("VALUES("), sqlFlags).append(')');
}
@Override
public boolean isEverything(ExpressionVisitor visitor) {
switch (visitor.getType()) {
case ExpressionVisitor.DETERMINISTIC:
return false;
}
return true;
}
@Override
public TypeInfo getType() {
return column.getType();
}
@Override
public int getCost() {
return 1;
}
}