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/*
* Copyright (c) 2017, 2022, 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;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.conf.RuntimeProperty;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.WrongArgumentException;
import com.mysql.cj.protocol.Message;
import com.mysql.cj.util.StringUtils;
public class ClientPreparedQuery extends AbstractQuery implements PreparedQuery {
protected QueryInfo queryInfo;
protected QueryBindings queryBindings = null;
/** The SQL that was passed in to 'prepare' */
protected String originalSql = null;
/** The number of parameters in this PreparedStatement */
protected int parameterCount;
/** Command index of currently executing batch command. */
protected int batchCommandIndex = -1;
protected RuntimeProperty autoClosePStmtStreams;
protected RuntimeProperty useStreamLengthsInPrepStmts;
public ClientPreparedQuery(NativeSession sess) {
super(sess);
this.autoClosePStmtStreams = this.session.getPropertySet().getBooleanProperty(PropertyKey.autoClosePStmtStreams);
this.useStreamLengthsInPrepStmts = this.session.getPropertySet().getBooleanProperty(PropertyKey.useStreamLengthsInPrepStmts);
}
@Override
public void closeQuery() {
super.closeQuery();
}
public QueryInfo getQueryInfo() {
return this.queryInfo;
}
public void setQueryInfo(QueryInfo queryInfo) {
this.queryInfo = queryInfo;
}
public String getOriginalSql() {
return this.originalSql;
}
public void setOriginalSql(String originalSql) {
this.originalSql = originalSql;
}
public int getParameterCount() {
return this.parameterCount;
}
public void setParameterCount(int parameterCount) {
this.parameterCount = parameterCount;
}
@Override
public QueryBindings getQueryBindings() {
return this.queryBindings;
}
@Override
public void setQueryBindings(QueryBindings queryBindings) {
this.queryBindings = queryBindings;
}
public int getBatchCommandIndex() {
return this.batchCommandIndex;
}
public void setBatchCommandIndex(int batchCommandIndex) {
this.batchCommandIndex = batchCommandIndex;
}
/**
* Computes the optimum number of batched parameter lists to send
* without overflowing max_allowed_packet.
*
* @param numBatchedArgs
* original batch size
* @return computed batch size
*/
public int computeBatchSize(int numBatchedArgs) {
long[] combinedValues = computeMaxParameterSetSizeAndBatchSize(numBatchedArgs);
long maxSizeOfParameterSet = combinedValues[0];
long sizeOfEntireBatch = combinedValues[1];
if (sizeOfEntireBatch < this.maxAllowedPacket.getValue() - this.originalSql.length()) {
return numBatchedArgs;
}
return (int) Math.max(1, (this.maxAllowedPacket.getValue() - this.originalSql.length()) / maxSizeOfParameterSet);
}
/**
* Method checkNullOrEmptyQuery.
*
* @param sql
* the SQL to check
*
* @throws WrongArgumentException
* if query is null or empty.
*/
public void checkNullOrEmptyQuery(String sql) {
if (sql == null) {
throw ExceptionFactory.createException(WrongArgumentException.class, Messages.getString("PreparedQuery.0"), this.session.getExceptionInterceptor());
}
if (sql.length() == 0) {
throw ExceptionFactory.createException(WrongArgumentException.class, Messages.getString("PreparedQuery.1"), this.session.getExceptionInterceptor());
}
}
public String asSql() {
StringBuilder buf = new StringBuilder();
Object batchArg = null;
if (this.batchCommandIndex != -1) {
batchArg = this.batchedArgs.get(this.batchCommandIndex);
}
byte[][] staticSqlStrings = this.queryInfo.getStaticSqlParts();
for (int i = 0; i < this.parameterCount; ++i) {
buf.append(this.charEncoding != null ? StringUtils.toString(staticSqlStrings[i], this.charEncoding) : StringUtils.toString(staticSqlStrings[i]));
String val = null;
if (batchArg != null && batchArg instanceof String) {
buf.append((String) batchArg);
continue;
}
val = this.batchCommandIndex == -1 ? (this.queryBindings == null ? null : this.queryBindings.getBindValues()[i].getString())
: ((QueryBindings) batchArg).getBindValues()[i].getString();
buf.append(val == null ? "** NOT SPECIFIED **" : val);
}
buf.append(this.charEncoding != null ? StringUtils.toString(staticSqlStrings[this.parameterCount], this.charEncoding)
: StringUtils.toAsciiString(staticSqlStrings[this.parameterCount]));
return buf.toString();
}
/**
* Computes the maximum parameter set size, and entire batch size given
* the number of arguments in the batch.
*
* @param numBatchedArgs
* number of batched arguments
* @return new long[] { maxSizeOfParameterSet, sizeOfEntireBatch }
*/
protected long[] computeMaxParameterSetSizeAndBatchSize(int numBatchedArgs) {
long sizeOfEntireBatch = 1 /* com_query */;
long maxSizeOfParameterSet = 0;
if (this.session.getServerSession().supportsQueryAttributes()) {
sizeOfEntireBatch += 9 /* parameter_count */ + 1 /* parameter_set_count */;
sizeOfEntireBatch += (this.queryAttributesBindings.getCount() + 7) / 8 /* null_bitmap */ + 1 /* new_params_bind_flag */;
for (int i = 0; i < this.queryAttributesBindings.getCount(); i++) {
BindValue queryAttribute = this.queryAttributesBindings.getAttributeValue(i);
sizeOfEntireBatch += 2 /* parameter_type */ + queryAttribute.getName().length() /* parameter_name */ + queryAttribute.getBinaryLength();
}
}
for (int i = 0; i < numBatchedArgs; i++) {
long sizeOfParameterSet = 0;
BindValue[] bindValues = ((QueryBindings) this.batchedArgs.get(i)).getBindValues();
for (int j = 0; j < bindValues.length; j++) {
sizeOfParameterSet += bindValues[j].getTextLength();
}
//
// 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
//
sizeOfParameterSet += this.queryInfo.getValuesClauseLength() != -1 ? this.queryInfo.getValuesClauseLength() + 1 : this.originalSql.length() + 1;
sizeOfEntireBatch += sizeOfParameterSet;
if (sizeOfParameterSet > maxSizeOfParameterSet) {
maxSizeOfParameterSet = sizeOfParameterSet;
}
}
return new long[] { maxSizeOfParameterSet, sizeOfEntireBatch };
}
@SuppressWarnings("unchecked")
@Override
public M fillSendPacket(QueryBindings bindings) {
return (M) this.session.getProtocol().getMessageBuilder().buildComQuery(this.session.getSharedSendPacket(), this.session, this, bindings,
this.charEncoding);
}
}
