From 0a056c9b5302c24ee4eaa9cc92bd6697125f94b7 Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Mon, 27 Jun 2016 19:22:09 +0200
Subject: better ER_VIRTUAL_COLUMN_FUNCTION_IS_NOT_ALLOWED

---
 sql/field.cc              |  2 +-
 sql/item.cc               | 17 +++++++++++++++++
 sql/item.h                | 16 ++++++++++------
 sql/item_func.cc          | 13 +++++++++++++
 sql/item_func.h           | 47 +++++++++++++++++++----------------------------
 sql/item_geofunc.h        |  2 +-
 sql/item_strfunc.h        |  6 +++---
 sql/item_subselect.h      |  2 +-
 sql/item_sum.cc           |  6 ++++++
 sql/item_sum.h            |  8 ++------
 sql/item_timefunc.h       | 18 +++++++++---------
 sql/item_windowfunc.h     |  2 +-
 sql/share/errmsg-utf8.txt |  4 ++--
 sql/table.cc              |  2 +-
 14 files changed, 86 insertions(+), 59 deletions(-)

(limited to 'sql')

diff --git a/sql/field.cc b/sql/field.cc
index 00f40fae748..054865c6513 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -9798,7 +9798,7 @@ bool Column_definition::check(THD *thd)
   if (vcol_info)
   {
     vcol_info->set_field_type(sql_type);
-    if (check_expression(vcol_info, "VIRTUAL", field_name,
+    if (check_expression(vcol_info, "GENERATED ALWAYS AS", field_name,
                          vcol_info->stored_in_db))
       DBUG_RETURN(TRUE);
   }
diff --git a/sql/item.cc b/sql/item.cc
index d8a282cc151..82c0ea7575c 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -1422,6 +1422,16 @@ bool mark_unsupported_function(const char *where, void *store, uint result)
   return false;
 }
 
+/* convenience helper for mark_unsupported_function() above */
+bool mark_unsupported_function(const char *w1, const char *w2,
+                               void *store, uint result)
+{
+  char *ptr= (char*)current_thd->alloc(strlen(w1) + strlen(w2) + 1);
+  if (ptr)
+    strxmov(ptr, w1, w2, NullS);
+  return mark_unsupported_function(ptr, store, result);
+}
+
 /*****************************************************************************
   Item_sp_variable methods
 *****************************************************************************/
@@ -8583,6 +8593,13 @@ void Item_trigger_field::print(String *str, enum_query_type query_type)
 }
 
 
+bool Item_trigger_field::check_vcol_func_processor(void *arg)
+{
+  const char *ver= row_version == NEW_ROW ? "NEW." : "OLD.";
+  return mark_unsupported_function(ver, field_name, arg, VCOL_IMPOSSIBLE);
+}
+
+
 void Item_trigger_field::cleanup()
 {
   want_privilege= original_privilege;
diff --git a/sql/item.h b/sql/item.h
index 41813e0a80f..4a5efad0048 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -62,6 +62,9 @@ char_to_byte_length_safe(uint32 char_length_arg, uint32 mbmaxlen_arg)
 
 bool mark_unsupported_function(const char *where, void *store, uint result);
 
+/* convenience helper for mark_unsupported_function() above */
+bool mark_unsupported_function(const char *w1, const char *w2,
+                               void *store, uint result);
 
 /* Bits for the split_sum_func() function */
 #define SPLIT_SUM_SKIP_REGISTERED 1     /* Skip registered funcs */
@@ -2032,6 +2035,10 @@ public:
   
   inline int save_in_field(Field *field, bool no_conversions);
   inline bool send(Protocol *protocol, String *str);
+  bool check_vcol_func_processor(void *arg) 
+  {
+    return mark_unsupported_function(m_name.str, arg, VCOL_IMPOSSIBLE);
+  }
 }; 
 
 /*****************************************************************************
@@ -2239,7 +2246,7 @@ public:
   }
   bool check_vcol_func_processor(void *arg) 
   {
-    return mark_unsupported_function("name_const", arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function("name_const()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -4936,7 +4943,7 @@ public:
   bool check_partition_func_processor(void *int_arg) {return TRUE;}
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function("values", arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function("values()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -5023,10 +5030,7 @@ private:
   */
   bool read_only;
 public:
-  bool check_vcol_func_processor(void *arg)
-  {
-    return mark_unsupported_function("trigger", arg, VCOL_IMPOSSIBLE);
-  }
+  bool check_vcol_func_processor(void *arg);
 };
 
 
diff --git a/sql/item_func.cc b/sql/item_func.cc
index bda3b76a8dd..c98630e0431 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -4587,6 +4587,11 @@ longlong Item_func_sleep::val_int()
 }
 
 
+bool Item_func_user_var::check_vcol_func_processor(void *arg)
+{
+  return mark_unsupported_function("@", name.str, arg, VCOL_IMPOSSIBLE);
+}
+
 #define extra_size sizeof(double)
 
 user_var_entry *get_variable(HASH *hash, LEX_STRING &name,
@@ -5847,6 +5852,10 @@ void Item_func_get_system_var::print(String *str, enum_query_type query_type)
   str->append(name, name_length);
 }
 
+bool Item_func_get_system_var::check_vcol_func_processor(void *arg)
+{
+  return mark_unsupported_function("@@", var->name.str, arg, VCOL_NON_DETERMINISTIC);
+}
 
 enum Item_result Item_func_get_system_var::result_type() const
 {
@@ -6850,6 +6859,10 @@ void Item_func_sp::update_used_tables()
   }
 }
 
+bool Item_func_sp::check_vcol_func_processor(void *arg)
+{
+  return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
+}
 
 /*
   uuid_short handling.
diff --git a/sql/item_func.h b/sql/item_func.h
index ddb56015224..474f7b802c0 100644
--- a/sql/item_func.h
+++ b/sql/item_func.h
@@ -614,7 +614,7 @@ public:
   longlong val_int() { DBUG_ASSERT(fixed == 1); return value; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_NON_DETERMINISTIC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_NON_DETERMINISTIC);
   }
 };
 
@@ -1041,7 +1041,7 @@ public:
   void cleanup() { first_eval= TRUE; Item_real_func::cleanup(); }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_NON_DETERMINISTIC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_NON_DETERMINISTIC);
   }
 private:
   void seed_random (Item * val);  
@@ -1337,7 +1337,7 @@ public:
   bool fix_fields(THD *thd, Item **ref);
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1354,7 +1354,7 @@ public:
   virtual void print(String *str, enum_query_type query_type);
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1376,7 +1376,7 @@ public:
   longlong val_int();
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1471,7 +1471,7 @@ public:
   virtual void print(String *str, enum_query_type query_type);
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_UNKNOWN);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_UNKNOWN);
   }
 };
 
@@ -1646,7 +1646,7 @@ class Item_func_get_lock :public Item_int_func
   bool is_expensive() { return 1; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1666,7 +1666,7 @@ public:
   bool is_expensive() { return 1; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1686,7 +1686,7 @@ public:
   void fix_length_and_dec() { max_length=21; maybe_null=1;}
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1702,7 +1702,7 @@ public:
   void fix_length_and_dec() { max_length=10+1+10+1+20+1; maybe_null=0;}
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1728,10 +1728,7 @@ public:
   Item_func_user_var(THD *thd, Item_func_user_var *item)
     :Item_hybrid_func(thd, item),
     m_var_entry(item->m_var_entry), name(item->name) { }
-  bool check_vcol_func_processor(void *arg)
-  {
-    return mark_unsupported_function("user_var", arg, VCOL_IMPOSSIBLE);
-  }
+  bool check_vcol_func_processor(void *arg);
 };
 
 
@@ -1938,10 +1935,7 @@ public:
   bool eq(const Item *item, bool binary_cmp) const;
 
   void cleanup();
-  bool check_vcol_func_processor(void *arg)
-  {
-    return mark_unsupported_function(func_name(), arg, VCOL_NON_DETERMINISTIC);
-  }
+  bool check_vcol_func_processor(void *arg);
 };
 
 
@@ -1989,7 +1983,7 @@ public:
   void init_search(THD *thd, bool no_order);
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function("match ... against()", arg, VCOL_IMPOSSIBLE);
   }
 private:
   /**
@@ -2046,7 +2040,7 @@ public:
   void fix_length_and_dec() { decimals=0; max_length=1; maybe_null=1;}
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -2060,7 +2054,7 @@ public:
   void fix_length_and_dec() { decimals=0; max_length=10; maybe_null=1;}
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -2110,7 +2104,7 @@ public:
   void fix_length_and_dec() { decimals= 0; maybe_null=0; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -2234,10 +2228,7 @@ public:
     return sp_result_field;
   }
 
-  bool check_vcol_func_processor(void *arg)
-  {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
-  }
+  bool check_vcol_func_processor(void *arg);
   bool limit_index_condition_pushdown_processor(void *opt_arg)
   {
     return TRUE;
@@ -2254,7 +2245,7 @@ public:
   void fix_length_and_dec() { decimals= 0; maybe_null=0; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -2272,7 +2263,7 @@ public:
   table_map used_tables() const { return RAND_TABLE_BIT; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_NON_DETERMINISTIC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_NON_DETERMINISTIC);
   }
 };
 
diff --git a/sql/item_geofunc.h b/sql/item_geofunc.h
index d3b49b6e457..5a0a26ea779 100644
--- a/sql/item_geofunc.h
+++ b/sql/item_geofunc.h
@@ -618,7 +618,7 @@ class Item_func_gis_debug: public Item_int_func
     longlong val_int();
     bool check_vcol_func_processor(void *arg)
     {
-      return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+      return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
     }
 };
 #endif
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 623f33b1eca..b0f5064a190 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -763,7 +763,7 @@ public:
   const char *func_name() const { return "binlog_gtid_pos"; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -923,7 +923,7 @@ public:
   }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -1191,7 +1191,7 @@ public:
   String *val_str(String *);
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_NON_DETERMINISTIC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_NON_DETERMINISTIC);
   }
 };
 
diff --git a/sql/item_subselect.h b/sql/item_subselect.h
index edbfc050971..bec04813bcf 100644
--- a/sql/item_subselect.h
+++ b/sql/item_subselect.h
@@ -222,7 +222,7 @@ public:
   bool enumerate_field_refs_processor(void *arg);
   bool check_vcol_func_processor(void *arg) 
   {
-    return mark_unsupported_function("subselect", arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function("select ...", arg, VCOL_IMPOSSIBLE);
   }
   /**
     Callback to test if an IN predicate is expensive.
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 90a9887f7f7..cc7a76213f0 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -579,6 +579,12 @@ Item *Item_sum::result_item(THD *thd, Field *field)
   return new (thd->mem_root) Item_field(thd, field);
 }
 
+bool Item_sum::check_vcol_func_processor(void *arg)
+{
+  return mark_unsupported_function(func_name(), ")", arg, VCOL_IMPOSSIBLE);
+}
+
+
 /**
   Compare keys consisting of single field that cannot be compared as binary.
  
diff --git a/sql/item_sum.h b/sql/item_sum.h
index b5f7b1458be..4cb5529e1ce 100644
--- a/sql/item_sum.h
+++ b/sql/item_sum.h
@@ -547,11 +547,7 @@ public:
   virtual void remove() { DBUG_ASSERT(0); }
 
   virtual void cleanup();
-  bool check_vcol_func_processor(void *arg)
-  {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
-  }
-  
+  bool check_vcol_func_processor(void *arg);
   virtual void setup_window_func(THD *thd, Window_spec *window_spec) {}
 };
 
@@ -1555,7 +1551,7 @@ public:
   void cleanup();
 
   enum Sumfunctype sum_func () const {return GROUP_CONCAT_FUNC;}
-  const char *func_name() const { return "group_concat"; }
+  const char *func_name() const { return "group_concat("; }
   virtual Item_result result_type () const { return STRING_RESULT; }
   virtual Item_result cmp_type () const { return STRING_RESULT; }
   enum_field_types field_type() const
diff --git a/sql/item_timefunc.h b/sql/item_timefunc.h
index e5040d51b72..9f67a1dabe6 100644
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@@ -196,7 +196,7 @@ public:
   }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -411,7 +411,7 @@ class Item_func_dayname :public Item_func_weekday
   bool check_partition_func_processor(void *int_arg) {return TRUE;}
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
@@ -464,7 +464,7 @@ public:
   {
     if (arg_count)
       return FALSE;
-    return mark_unsupported_function(func_name(), arg, VCOL_TIME_FUNC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_TIME_FUNC);
   }
   longlong int_op();
   my_decimal *decimal_op(my_decimal* buf);
@@ -614,7 +614,7 @@ public:
   virtual void store_now_in_TIME(THD *thd, MYSQL_TIME *now_time)=0;
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_TIME_FUNC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_TIME_FUNC);
   }
 };
 
@@ -649,7 +649,7 @@ public:
   virtual void store_now_in_TIME(THD *thd, MYSQL_TIME *now_time)=0;
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg,
+    return mark_unsupported_function(func_name(), "()", arg,
                                                           VCOL_TIME_FUNC);
   }
 };
@@ -691,7 +691,7 @@ public:
       NOW is safe for replication as slaves will run with same time as
       master
     */
-    return mark_unsupported_function(func_name(), arg, VCOL_TIME_FUNC);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_TIME_FUNC);
   }
 };
 
@@ -715,7 +715,7 @@ public:
   virtual enum Functype functype() const { return NOW_UTC_FUNC; }
   virtual bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg,
+    return mark_unsupported_function(func_name(), "()", arg,
                                      VCOL_TIME_FUNC | VCOL_NON_DETERMINISTIC);
   }
 
@@ -737,7 +737,7 @@ public:
   table_map used_tables() const { return RAND_TABLE_BIT; }
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg,
+    return mark_unsupported_function(func_name(), "()", arg,
                                      VCOL_TIME_FUNC | VCOL_NON_DETERMINISTIC);
   }
   virtual enum Functype functype() const { return SYSDATE_FUNC; }
@@ -776,7 +776,7 @@ public:
   bool eq(const Item *item, bool binary_cmp) const;
   bool check_vcol_func_processor(void *arg)
   {
-    return mark_unsupported_function(func_name(), arg, VCOL_IMPOSSIBLE);
+    return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
 };
 
diff --git a/sql/item_windowfunc.h b/sql/item_windowfunc.h
index 56fa272ac45..9d2fa135e29 100644
--- a/sql/item_windowfunc.h
+++ b/sql/item_windowfunc.h
@@ -117,7 +117,7 @@ public:
   }
   const char*func_name() const
   {
-    return "row_number";
+    return "row_number(";
   }
   
 };
diff --git a/sql/share/errmsg-utf8.txt b/sql/share/errmsg-utf8.txt
index ba75a6a9149..980055a7933 100644
--- a/sql/share/errmsg-utf8.txt
+++ b/sql/share/errmsg-utf8.txt
@@ -6970,7 +6970,7 @@ start-error-number 1900
 ER_VCOL_BASED_ON_VCOL
   eng "A computed column cannot be based on a computed column"
 ER_VIRTUAL_COLUMN_FUNCTION_IS_NOT_ALLOWED
-  eng "Function or expression '%s' is not allowed for '%s' of column/constraint '%s'"
+  eng "Function or expression '%s' cannot be used in the %s clause of %`s"
 ER_DATA_CONVERSION_ERROR_FOR_VIRTUAL_COLUMN
   eng "Generated value for computed column '%s' cannot be converted to type '%s'"
 ER_PRIMARY_KEY_BASED_ON_VIRTUAL_COLUMN
@@ -7209,7 +7209,7 @@ ER_CONSTRAINT_FAILED 23000
         rus "проверка CONSTRAINT %`s для %`-.192s.%`-.192s провалилась"
         ukr "Перевірка CONSTRAINT %`s для %`-.192s.%`-.192s не пройшла"
 ER_EXPRESSION_IS_TOO_BIG
-        eng "%s expression is too big for '%s'"
+        eng "%s expression in the %s clause is too big"
 ER_ERROR_EVALUATING_EXPRESSION
         eng "Got an error evaluating stored expression %`s"
 ER_CALCULATING_DEFAULT_VALUE
diff --git a/sql/table.cc b/sql/table.cc
index 98f2f755c02..20444114381 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -2614,7 +2614,7 @@ static bool fix_vcol_expr(THD *thd,
   if (error || (res.errors & VCOL_IMPOSSIBLE))
   {
     my_error(ER_VIRTUAL_COLUMN_FUNCTION_IS_NOT_ALLOWED, MYF(0), res.name,
-             field_name);
+             "???", field_name);
     goto end;
   }
 #endif
-- 
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