Implemented SP CONDITIONs and HANDLERs, with the extension of handling

MySQL error codes as well.
(No UNDO HANDLERs yet, and no SIGNAL or RESIGNAL.)
WL#850


Docs/sp-imp-spec.txt:
  Spec of CONDITIONs and HANDLERs (and updated some old stuff too).
Docs/sp-implemented.txt:
  Updated info about caching, CONDITIONs and HANDLERs.
include/mysqld_error.h:
  New error for undeclared CONDITION.
libmysqld/Makefile.am:
  New file: sp_rcontext.cc.
mysql-test/r/sp-error.result:
  New tests for CONDITIONs and HANDLERs.
mysql-test/r/sp.result:
  New tests for CONDITIONs and HANDLERs.
mysql-test/t/sp-error.test:
  New tests for CONDITIONs and HANDLERs.
mysql-test/t/sp.test:
  New tests for CONDITIONs and HANDLERs.
sql/Makefile.am:
  New file: sp_rcontext.cc.
sql/lex.h:
  New symbols for CONDITIONs, HANDLERs and CURSORs.
sql/mysqld.cc:
  Catch error if we have a handler for it.
sql/protocol.cc:
  Catch error if we have a handler for it.
sql/share/czech/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/danish/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/dutch/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/english/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/estonian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/french/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/german/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/greek/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/hungarian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/italian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/japanese/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/korean/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/norwegian-ny/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/norwegian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/polish/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/portuguese/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/romanian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/russian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/serbian/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/slovak/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/spanish/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/swedish/errmsg.txt:
  New error for undeclared CONDITION.
sql/share/ukrainian/errmsg.txt:
  New error for undeclared CONDITION.
sql/sp_head.cc:
  New HANDLER code.
sql/sp_head.h:
  New HANDLER code.
sql/sp_pcontext.cc:
  New CONDITION and HANDLER code.
sql/sp_pcontext.h:
  New CONDITION and HANDLER code.
sql/sp_rcontext.h:
  New CONDITION and HANDLER code.
sql/sql_yacc.yy:
  New CONDITION and HANDLER code.

1 files changed, 95 insertions, 0 deletions

diff --git a/sql/sp_rcontext.cc b/sql/sp_rcontext.cc
new file mode 100644
index 00000000000..79d02d843ea
--- /dev/null
+++ b/sql/sp_rcontext.cc
@@ -0,0 +1,95 @@
+/* Copyright (C) 2002 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#ifdef __GNUC__
+#pragma implementation
+#endif
+
+#if defined(WIN32) || defined(__WIN__)
+#undef SAFEMALLOC				/* Problems with threads */
+#endif
+
+#include "mysql_priv.h"
+#include "sp_rcontext.h"
+#include "sp_pcontext.h"
+
+sp_rcontext::sp_rcontext(uint fsize, uint hmax)
+  : m_count(0), m_fsize(fsize), m_result(NULL), m_hcount(0), m_hsp(0)
+{
+  m_frame= (Item **)sql_alloc(fsize * sizeof(Item*));
+  m_outs= (int *)sql_alloc(fsize * sizeof(int));
+  m_handler= (sp_handler_t *)sql_alloc(hmax * sizeof(sp_handler_t));
+  m_hstack= (uint *)sql_alloc(hmax * sizeof(uint));
+  m_saved.empty();
+}
+
+int
+sp_rcontext::find_handler(uint sql_errno)
+{
+  if (m_hfound >= 0)
+    return 1;			// Already got one
+
+  const char *sqlstate= mysql_errno_to_sqlstate(sql_errno);
+  int i= m_hcount, found= 0;
+
+  while (!found && i--)
+  {
+    sp_cond_type_t *cond= m_handler[i].cond;
+
+    switch (cond->type)
+    {
+    case sp_cond_type_t::number:
+      if (sql_errno == cond->mysqlerr)
+	found= 1;
+      break;
+    case sp_cond_type_t::state:
+      if (strcmp(sqlstate, cond->sqlstate) == 0)
+	found= 1;
+      break;
+    case sp_cond_type_t::warning:
+      if (sqlstate[0] == '0' && sqlstate[0] == '1')
+	found= 1;
+      break;
+    case sp_cond_type_t::notfound:
+      if (sqlstate[0] == '0' && sqlstate[0] == '2')
+	found= 1;
+      break;
+    case sp_cond_type_t::exception:
+      if (sqlstate[0] != '0' || sqlstate[0] > '2')
+	found= 1;
+      break;
+    }
+  }
+  if (found)
+    m_hfound= i;
+  return found;
+}
+
+void
+sp_rcontext::save_variables(uint fp)
+{
+  while (fp < m_count)
+    m_saved.push_front(m_frame[fp++]);
+}
+
+void
+sp_rcontext::restore_variables(uint fp)
+{
+  uint i= m_count;
+
+  while (i-- > fp)
+    m_frame[i]= m_saved.pop();
+}