8 files changed, 49 insertions, 1 deletions

diff --git a/mysql-test/r/sp-error.result b/mysql-test/r/sp-error.result
index 35d61ce757d..17ab2b79043 100644
--- a/mysql-test/r/sp-error.result
+++ b/mysql-test/r/sp-error.result
@@ -1660,3 +1660,13 @@ declare continue handler for sqlstate '00000' set @x=0;
 end$$
 ERROR 42000: Bad SQLSTATE: '00000'
 LOAD DATA INFILE '../../tmp/proc.txt' INTO TABLE mysql.proc;
+CREATE TABLE t1 (a INT, b INT);
+INSERT INTO t1 VALUES (1,1), (2,2);
+SELECT MAX (a) FROM t1 WHERE b = 999999;
+ERROR 42000: FUNCTION test.MAX does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manual
+SELECT AVG (a) FROM t1 WHERE b = 999999;
+AVG (a)
+NULL
+SELECT non_existent (a) FROM t1 WHERE b = 999999;
+ERROR 42000: FUNCTION test.non_existent does not exist
+DROP TABLE t1;
diff --git a/mysql-test/t/sp-error.test b/mysql-test/t/sp-error.test
index 8d7c6d75a34..66b960c938f 100644
--- a/mysql-test/t/sp-error.test
+++ b/mysql-test/t/sp-error.test
@@ -2435,3 +2435,16 @@ delimiter ;$$
 #
 LOAD DATA INFILE '../../tmp/proc.txt' INTO TABLE mysql.proc;
 remove_file $MYSQLTEST_VARDIR/tmp/proc.txt;
+
+#
+# Bug #38159: Function parsing problem generates misleading error message
+#
+
+CREATE TABLE t1 (a INT, b INT);
+INSERT INTO t1 VALUES (1,1), (2,2);
+--error ER_FUNC_INEXISTENT_NAME_COLLISION
+SELECT MAX (a) FROM t1 WHERE b = 999999;
+SELECT AVG (a) FROM t1 WHERE b = 999999;
+--error ER_SP_DOES_NOT_EXIST
+SELECT non_existent (a) FROM t1 WHERE b = 999999;
+DROP TABLE t1;
diff --git a/sql/item_func.cc b/sql/item_func.cc
index 0c8f236a27c..85e5de7b980 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -5802,6 +5802,14 @@ Item_func_sp::func_name() const
 }
 
 
+int my_missing_function_error(const LEX_STRING &token, const char *func_name)
+{
+  if (token.length && is_lex_native_function (&token))
+    return my_error(ER_FUNC_INEXISTENT_NAME_COLLISION, MYF(0), func_name);
+  else
+    return my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION", func_name);
+}
+
 
 /**
   @brief Initialize the result field by creating a temporary dummy table
@@ -5834,7 +5842,7 @@ Item_func_sp::init_result_field(THD *thd)
   if (!(m_sp= sp_find_routine(thd, TYPE_ENUM_FUNCTION, m_name,
                                &thd->sp_func_cache, TRUE)))
   {
-    my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION", m_name->m_qname.str);
+    my_missing_function_error (m_name->m_name, m_name->m_qname.str);
     context->process_error(thd);
     DBUG_RETURN(TRUE);
   }
diff --git a/sql/share/errmsg.txt b/sql/share/errmsg.txt
index 2dfc5310643..7c92c827c87 100644
--- a/sql/share/errmsg.txt
+++ b/sql/share/errmsg.txt
@@ -6177,3 +6177,6 @@ ER_TOO_LONG_TABLE_COMMENT
 ER_TOO_LONG_FIELD_COMMENT
   eng "Comment for field '%-.64s' is too long (max = %lu)"
   por "Comentário para o campo '%-.64s' é longo demais (max = %lu)"
+
+ER_FUNC_INEXISTENT_NAME_COLLISION 42000 
+  eng "FUNCTION %s does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manual"
diff --git a/sql/sql_derived.cc b/sql/sql_derived.cc
index 41be98621a6..37adf5c403a 100644
--- a/sql/sql_derived.cc
+++ b/sql/sql_derived.cc
@@ -179,6 +179,7 @@ exit:
     {
       if (thd->is_error() &&
           (thd->main_da.sql_errno() == ER_BAD_FIELD_ERROR ||
+          thd->main_da.sql_errno() == ER_FUNC_INEXISTENT_NAME_COLLISION ||
           thd->main_da.sql_errno() == ER_SP_DOES_NOT_EXIST))
       {
         thd->clear_error();
diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index b96ac91679b..03da3c2338a 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -433,6 +433,16 @@ bool is_keyword(const char *name, uint len)
   return get_hash_symbol(name,len,0)!=0;
 }
 
+/**
+  Check if name is a sql function
+
+    @param name      checked name
+
+    @return is this a native function or not
+    @retval 0         name is a function
+    @retval 1         name isn't a function
+*/
+
 bool is_lex_native_function(const LEX_STRING *name)
 {
   DBUG_ASSERT(name != NULL);
diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index 62106a2500b..22b7d2e359c 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -1976,4 +1976,6 @@ extern bool is_lex_native_function(const LEX_STRING *name);
   @} (End of group Semantic_Analysis)
 */
 
+int my_missing_function_error(const LEX_STRING &token, const char *name);
+
 #endif /* MYSQL_SERVER */
diff --git a/sql/table.cc b/sql/table.cc
index 066bbc953fa..7e8d5ac98b4 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -3341,6 +3341,7 @@ void TABLE_LIST::hide_view_error(THD *thd)
 
   if (thd->main_da.sql_errno() == ER_BAD_FIELD_ERROR ||
       thd->main_da.sql_errno() == ER_SP_DOES_NOT_EXIST ||
+      thd->main_da.sql_errno() == ER_FUNC_INEXISTENT_NAME_COLLISION ||
       thd->main_da.sql_errno() == ER_PROCACCESS_DENIED_ERROR ||
       thd->main_da.sql_errno() == ER_COLUMNACCESS_DENIED_ERROR ||
       thd->main_da.sql_errno() == ER_TABLEACCESS_DENIED_ERROR ||