com.mysql.cj.ClientPreparedQuery Maven / Gradle / Ivy
/*
* Copyright (c) 2017, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj;
//TODO should not be protocol-specific
public class ClientPreparedQuery extends AbstractPreparedQuery {
public ClientPreparedQuery(NativeSession sess) {
super(sess);
}
/**
* Computes the maximum parameter set size, and entire batch size given
* the number of arguments in the batch.
*
*/
@Override
protected long[] computeMaxParameterSetSizeAndBatchSize(int numBatchedArgs) {
long sizeOfEntireBatch = 0;
long maxSizeOfParameterSet = 0;
for (int i = 0; i < numBatchedArgs; i++) {
ClientPreparedQueryBindings qBindings = (ClientPreparedQueryBindings) this.batchedArgs.get(i);
BindValue[] bindValues = qBindings.getBindValues();
long sizeOfParameterSet = 0;
for (int j = 0; j < bindValues.length; j++) {
if (!bindValues[j].isNull()) {
if (bindValues[j].isStream()) {
long streamLength = bindValues[j].getStreamLength();
if (streamLength != -1) {
sizeOfParameterSet += streamLength * 2; // for safety in escaping
} else {
int paramLength = qBindings.getBindValues()[j].getByteValue().length;
sizeOfParameterSet += paramLength;
}
} else {
sizeOfParameterSet += qBindings.getBindValues()[j].getByteValue().length;
}
} else {
sizeOfParameterSet += 4; // for NULL literal in SQL
}
}
//
// Account for static part of values clause
// This is a little naive, because the ?s will be replaced but it gives us some padding, and is less housekeeping to ignore them. We're looking
// for a "fuzzy" value here anyway
//
if (this.parseInfo.getValuesClause() != null) {
sizeOfParameterSet += this.parseInfo.getValuesClause().length() + 1;
} else {
sizeOfParameterSet += this.originalSql.length() + 1;
}
sizeOfEntireBatch += sizeOfParameterSet;
if (sizeOfParameterSet > maxSizeOfParameterSet) {
maxSizeOfParameterSet = sizeOfParameterSet;
}
}
return new long[] { maxSizeOfParameterSet, sizeOfEntireBatch };
}
}