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drizzled/statement/execute.cc
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#include "config.h"
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#include "drizzled/statement/execute.h"
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#include "drizzled/session.h"
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#include "drizzled/execute.h"
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#include "drizzled/user_var_entry.h"
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#include "drizzled/plugin/listen.h"
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#include "drizzled/plugin/client.h"
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#include "drizzled/plugin/null_client.h"
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#include "drizzled/plugin/client/concurrent.h"
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namespace drizzled
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{
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void mysql_parse(drizzled::Session *session, const char *inBuf, uint32_t length);
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namespace statement
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{
 
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#include <config.h>
 
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#include <drizzled/statement/execute.h>
 
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#include <drizzled/session.h>
 
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#include <drizzled/execute.h>
 
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#include <drizzled/user_var_entry.h>
 
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#include <drizzled/plugin/listen.h>
 
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#include <drizzled/plugin/client.h>
 
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#include <drizzled/plugin/null_client.h>
 
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#include <drizzled/plugin/client/concurrent.h>
 
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#include <drizzled/sql_lex.h>
 
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namespace drizzled {
 
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void parse(drizzled::Session&, const char *inBuf, uint32_t length);
 
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namespace statement {
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Execute::Execute(Session *in_session,
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                 drizzled::execute_string_t to_execute_arg,
 
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                 execute_string_t to_execute_arg,
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                 bool is_quiet_arg,
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                 bool is_concurrent_arg,
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                 bool should_wait_arg) :
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{
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  if (to_execute.isVariable())
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  {
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    user_var_entry *var= getSession()->getVariable(to_execute, false);
 
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    user_var_entry *var= session().getVariable(to_execute, false);
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    if (var && var->length && var->value && var->type == STRING_RESULT)
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    {
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      LEX_STRING tmp_for_var;
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      tmp_for_var.str= var->value; 
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      tmp_for_var.length= var->length; 
 
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      lex_string_t tmp_for_var;
 
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      tmp_for_var.assign(var->value, var->length); 
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      to_execute.set(tmp_for_var);
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      return true;
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}
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bool statement::Execute::runStatement(plugin::NullClient *client, const std::string &arg)
 
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bool statement::Execute::runStatement(plugin::NullClient& client, const std::string &arg)
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{
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  client->pushSQL(arg);
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  if (not getSession()->executeStatement())
 
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  client.pushSQL(arg);
 
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  if (not session().executeStatement())
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    return true;
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  if (getSession()->is_error())
 
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  if (session().is_error())
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    return true;
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  return false;
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  bool ret= execute_shell();
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  // We have to restore ourselves at the top for delete() to work.
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  getSession()->getLex()->statement= this;
 
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  lex().statement= this;
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  return ret;
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}
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bool statement::Execute::execute_shell()
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{
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  if (to_execute.length == 0)
 
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  if (to_execute.size() == 0)
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  {
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    my_error(ER_WRONG_ARGUMENTS, MYF(0), "Invalid Variable");
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    return false;
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  if (is_concurrent)
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  {
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    if (not getSession()->isConcurrentExecuteAllowed())
 
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    if (not session().isConcurrentExecuteAllowed())
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    {
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      my_error(ER_WRONG_ARGUMENTS, MYF(0), "A Concurrent Execution Session can not launch another session.");
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      return false;
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    }
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    drizzled::Execute executer(*getSession(), should_wait);
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    executer.run(to_execute.str, to_execute.length);
 
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    drizzled::Execute executer(session(), should_wait);
 
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    executer.run(to_execute);
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  }
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  else // Non-concurrent run.
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  {
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    if (is_quiet)
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    {
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      plugin::Client *temp= getSession()->getClient();
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      plugin::NullClient *null_client= new plugin::NullClient;
 
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      plugin::Client *temp= session().getClient();
 
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      boost::scoped_ptr<plugin::NullClient> null_client(new plugin::NullClient);
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      getSession()->setClient(null_client);
 
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      session().setClient(null_client.get());
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      bool error_occured= false;
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      bool is_savepoint= false;
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      {
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        std::string start_sql;
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        if (getSession()->inTransaction())
 
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        if (session().inTransaction())
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        {
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          // @todo Figure out something a bit more solid then this.
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          start_sql.append("SAVEPOINT execute_internal_savepoint");
 
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          start_sql= "SAVEPOINT execute_internal_savepoint";
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          is_savepoint= true;
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        }
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        else
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        {
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          start_sql.append("START TRANSACTION");
 
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          start_sql= "START TRANSACTION";
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        }
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        error_occured= runStatement(null_client, start_sql);
 
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        error_occured= runStatement(*null_client, start_sql);
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      }
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      // @note this is copied from code in NULL client, all of this belongs
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      if (not error_occured)
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      {
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        typedef boost::tokenizer<boost::escaped_list_separator<char> > Tokenizer;
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        std::string full_string(to_execute.str, to_execute.length);
 
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        std::string full_string(to_execute.data(), to_execute.size());
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        Tokenizer tok(full_string, boost::escaped_list_separator<char>("\\", ";", "\""));
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        for (Tokenizer::iterator iter= tok.begin();
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             iter != tok.end() and getSession()->getKilled() != Session::KILL_CONNECTION;
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             ++iter)
 
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        for (Tokenizer::iterator iter= tok.begin(); iter != tok.end(); ++iter)
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        {
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          if (runStatement(null_client, *iter))
 
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          if (session().getKilled() == Session::KILL_CONNECTION)
 
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            break;
 
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          if (runStatement(*null_client, *iter))
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          {
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            error_occured= true;
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            break;
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          std::string final_sql;
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          if (is_savepoint)
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          {
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            if (error_occured)
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            {
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              final_sql.append("ROLLBACK TO SAVEPOINT execute_internal_savepoint");
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            }
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            else
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            {
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              final_sql.append("RELEASE SAVEPOINT execute_internal_savepoint");
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            }
 
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            final_sql= error_occured ? 
 
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              "ROLLBACK TO SAVEPOINT execute_internal_savepoint" : 
 
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              "RELEASE SAVEPOINT execute_internal_savepoint";
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          }
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          else
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          {
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            if (error_occured)
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            {
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              final_sql.append("ROLLBACK");
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            }
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            else
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            {
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              final_sql.append("COMMIT");
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            }
 
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            final_sql= error_occured ? "ROLLBACK" : "COMMIT";
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          }
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          // Run the cleanup command, we currently ignore if an error occurs
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          // here.
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          (void)runStatement(null_client, final_sql);
 
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          (void)runStatement(*null_client, final_sql);
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        }
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      }
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      getSession()->setClient(temp);
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      if (getSession()->is_error())
 
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      session().setClient(temp);
 
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      if (session().is_error())
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      {
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        getSession()->clear_error(true);
 
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        session().clear_error(true);
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      }
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      else
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      {
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        getSession()->clearDiagnostics();
 
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        session().clearDiagnostics();
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      }
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      getSession()->my_ok();
 
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      session().my_ok();
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      null_client->close();
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      delete null_client;
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    }
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    else
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    {
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      mysql_parse(getSession(), to_execute.str, to_execute.length);
 
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      parse(session(), to_execute.data(), to_execute.size());
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    }
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  }
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