Added collection of called procedures in a list.

Fixed eval bug; now conditions with local variables work in WHILE et al.
Made mysql_install_db.sh create proc table.


scripts/mysql_install_db.sh:
  Added creation of the mysql.proc table.
  Note: The table format will change later, right now it's rather minimalistic,
  just so things can be tested (and the database can easily be recreated when
  I break it :-/ ).
sql/item.h:
  Removed unused method.
sql/sp_head.cc:
  Added collection of called procedures in a list.
  Fixed eval bug; now conditions with local variables work in WHILE et al.

scripts/mysql_install_db.sh

@@ -306,6 +306,18 @@ then
   c_c="$c_c   comment='Column privileges';"
 fi
 
+if test ! -f $mdata/proc.frm
+then
+  echo "Preparing proc table"
+
+  c_p="$c_p CREATE TABLE proc ("
+  c_p="$c_p   name char(64) binary DEFAULT '' NOT NULL,"
+  c_p="$c_p   body blob DEFAULT '' NOT NULL,"
+  c_p="$c_p   PRIMARY KEY (name)"
+  c_p="$c_p )"
+  c_p="$c_p   comment='Stored Procedures';"
+fi
+
 echo "Installing all prepared tables"
 if (
     cat << END_OF_DATA
@@ -324,6 +336,7 @@ $i_f
 
 $c_t
 $c_c
+$c_p
 END_OF_DATA
     cat fill_func_tables.sql
 ) | eval "$execdir/mysqld $defaults --bootstrap --skip-grant-tables \

sql/item.h

@@ -126,11 +126,6 @@ public:
     return m_offset;
   }
 
-  virtual Item_result result_type() const
-  {
-    return this_const_item()->result_type();
-  }
-
   // Abstract methods inherited from Item. Just defer the call to
   // the item in the frame
   inline enum Type type() const

sql/sp_head.cc

@@ -28,10 +28,13 @@
 ** if nothing else.
 */
 static Item *
-eval_func_item(Item *it, enum enum_field_types type)
+eval_func_item(THD *thd, Item *it, enum enum_field_types type)
 {
   it= it->this_item();
 
+  if (it->fix_fields(thd, 0, NULL))
+    return it;			// Shouldn't happen?
+
   /* QQ How do we do this? Is there some better way? */
   switch (type)
   {
@@ -133,7 +136,7 @@ sp_head::execute(THD *thd)
 	if (pvar->mode == sp_param_out)
 	  nctx->push_item(it->this_item()); // OUT
 	else
-	  nctx->push_item(eval_func_item(it, pvar->type)); // IN or INOUT
+	  nctx->push_item(eval_func_item(thd, it, pvar->type)); // IN or INOUT
 	// Note: If it's OUT or INOUT, it must be a variable.
 	// QQ: Need to handle "global" user/host variables too!!!
 	if (pvar->mode == sp_param_in)
@@ -202,7 +205,9 @@ sp_head::reset_lex(THD *thd)
   /* And keep the SP stuff too */
   thd->lex.sphead = m_lex.sphead;
   thd->lex.spcont = m_lex.spcont;
-  /* QQ Why isn't this reset by lex_start() ??? */
+  /* Clear all lists. (QQ Why isn't this reset by lex_start()?).
+     We may be overdoing this, but we know for sure that value_list must
+     be cleared at least. */
   thd->lex.col_list.empty();
   thd->lex.ref_list.empty();
   thd->lex.drop_list.empty();
@@ -229,7 +234,28 @@ sp_head::restore_lex(THD *thd)
   // Update some state in the old one first
   m_lex.ptr= thd->lex.ptr;
   m_lex.next_state= thd->lex.next_state;
-  // QQ Append tables, fields, etc. from the current lex to mine
+  // Collect some data from the sub statement lex.
+  // We reuse some lists in lex instead of adding new ones to this already
+  // quite large structure.
+
+  // CALL puts the proc. name and parameters in value_list, so we might as
+  // collect called procedures there.
+  if (thd->lex.sql_command == SQLCOM_CALL)
+  {
+    // Assuming we will rarely have more than, say, 10 calls to other
+    // procedures, this is probably fastest.
+    Item *proc= thd->lex.value_list.head();
+    List_iterator_fast<Item> li(m_lex.value_list);
+    Item *it;
+
+    while ((it= li++))
+      if (proc->eq(it, FALSE))
+	break;
+    if (! it)
+      m_lex.value_list.push_back(proc); // Got a new one.
+  }
+  // QQ Copy select_lex.table_list.
+
   memcpy(&thd->lex, &m_lex, sizeof(LEX)); // Restore lex
 }
 
@@ -285,7 +311,7 @@ sp_instr_stmt::execute(THD *thd, uint *nextp)
 int
 sp_instr_set::execute(THD *thd, uint *nextp)
 {
-  thd->spcont->set_item(m_offset, eval_func_item(m_value, m_type));
+  thd->spcont->set_item(m_offset, eval_func_item(thd, m_value, m_type));
   *nextp = m_ip+1;
   return 0;
 }
@@ -296,7 +322,7 @@ sp_instr_set::execute(THD *thd, uint *nextp)
 int
 sp_instr_jump_if::execute(THD *thd, uint *nextp)
 {
-  Item *it= eval_func_item(m_expr, MYSQL_TYPE_TINY);
+  Item *it= eval_func_item(thd, m_expr, MYSQL_TYPE_TINY);
 
   if (it->val_int())
     *nextp = m_dest;
@@ -311,7 +337,7 @@ sp_instr_jump_if::execute(THD *thd, uint *nextp)
 int
 sp_instr_jump_if_not::execute(THD *thd, uint *nextp)
 {
-  Item *it= eval_func_item(m_expr, MYSQL_TYPE_TINY);
+  Item *it= eval_func_item(thd, m_expr, MYSQL_TYPE_TINY);
 
   if (! it->val_int())
     *nextp = m_dest;