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#include "queryexecutorexecute.h"
#include "db/sqlerrorcodes.h"
#include "db/queryexecutor.h"
#include "parser/ast/sqlitequery.h"
#include "parser/lexer.h"
#include "log.h"
#include "parser/ast/sqlitecreatetable.h"
#include "datatype.h"
#include "schemaresolver.h"
#include "common/table.h"
#include <QDateTime>
#include <QDebug>
#include <QStack>
bool QueryExecutorExecute::exec()
{
//qDebug() << "q:" << context->processedQuery;
startTime = QDateTime::currentMSecsSinceEpoch();
return executeQueries();
}
void QueryExecutorExecute::provideResultColumns(SqlQueryPtr results)
{
QueryExecutor::ResultColumnPtr resCol;
for (const QString& colName : results->getColumnNames())
{
resCol = QueryExecutor::ResultColumnPtr::create();
resCol->displayName = colName;
context->resultColumns << resCol;
}
}
bool QueryExecutorExecute::executeQueries()
{
QHash<QString, QVariant> bindParamsForQuery;
SqlQueryPtr results;
context->rowsAffected = 0;
QStack<int> rowsAffectedBeforeTransaction;
Db::Flags flags;
if (context->preloadResults)
flags |= Db::Flag::PRELOAD;
QString queryStr;
for (const SqliteQueryPtr& query : context->parsedQueries)
{
queryStr = query->detokenize();
bindParamsForQuery = getBindParamsForQuery(query);
results = db->prepare(queryStr);
results->setArgs(bindParamsForQuery);
results->setFlags(flags);
if (isBeginTransaction(query->queryType))
rowsAffectedBeforeTransaction.push(context->rowsAffected);
//qDebug() << getLogDateTime() << "Executing query:" << queryStr;
results->execute();
//qDebug() << getLogDateTime() << "Done.";
if (results->isError())
{
handleFailResult(results);
return false;
}
context->rowsAffected += results->rowsAffected();
if (rowsAffectedBeforeTransaction.size() > 0)
{
if (isCommitTransaction(query->queryType))
rowsAffectedBeforeTransaction.pop();
else if (isRollbackTransaction(query->queryType))
context->rowsAffected = rowsAffectedBeforeTransaction.pop();
}
}
handleSuccessfulResult(results);
return true;
}
void QueryExecutorExecute::handleSuccessfulResult(SqlQueryPtr results)
{
SqliteSelectPtr select = getSelect();
if (!select || select->coreSelects.size() > 1 || select->explain)
{
// In this case, the "Columns" step didn't provide result columns.
// We need to do it here, basing on actual results.
provideResultColumns(results);
}
context->executionTime = QDateTime::currentMSecsSinceEpoch() - startTime;
// For PRAGMA and EXPLAIN we simply count results for rows returned
SqliteQueryPtr lastQuery = context->parsedQueries.last();
if (lastQuery->queryType != SqliteQueryType::Select || lastQuery->explain)
context->rowsManualCountingRequired = true;
if (context->resultsHandler)
{
context->resultsHandler(results);
context->resultsHandler = nullptr;
}
context->executionResults = results;
}
void QueryExecutorExecute::handleFailResult(SqlQueryPtr results)
{
if (!results->isInterrupted())
{
context->errorCodeFromSmartExecution = results->getErrorCode();
context->errorMessageFromSmartExecution = results->getErrorText();
qWarning() << "Could not execute query with smart method:" << queryExecutor->getOriginalQuery()
<< "\nError message:" << results->getErrorText()
<< "\nActual, post-processed query:" << context->processedQuery
<< "\nSkipping smart execution.";
}
}
QHash<QString, QVariant> QueryExecutorExecute::getBindParamsForQuery(SqliteQueryPtr query)
{
QHash<QString, QVariant> queryParams;
QStringList bindParams = query->tokens.filter(Token::BIND_PARAM).toValueList();
for (const QString& bindParam : bindParams)
{
if (context->queryParameters.contains(bindParam))
queryParams.insert(bindParam, context->queryParameters[bindParam]);
}
return queryParams;
}
bool QueryExecutorExecute::isBeginTransaction(SqliteQueryType queryType)
{
return (queryType == SqliteQueryType::BeginTrans || queryType == SqliteQueryType::Savepoint);
}
bool QueryExecutorExecute::isCommitTransaction(SqliteQueryType queryType)
{
return (queryType == SqliteQueryType::CommitTrans || queryType == SqliteQueryType::Release);
}
bool QueryExecutorExecute::isRollbackTransaction(SqliteQueryType queryType)
{
return queryType == SqliteQueryType::Rollback;
}
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