Bug #13055685 NO WAY TO REPLACE NON-DETERMINISTIC FRAGMENTS IN OUTPUT OF MTR'S ECHO

Don't do this for echo, instead:
    1) Enable replacements also for assignment from backquoted SQL
    2) Allow replace_regex to take a variable for the *entire* argument list
  
    With this, the test can be amended, but only in its version in trunk

client/mysqltest.cc

@@ -502,6 +502,31 @@ struct st_command *curr_command= 0;
 
 char builtin_echo[FN_REFLEN];
 
+struct st_replace_regex
+{
+DYNAMIC_ARRAY regex_arr; /* stores a list of st_regex subsitutions */
+
+/*
+Temporary storage areas for substitutions. To reduce unnessary copying
+and memory freeing/allocation, we pre-allocate two buffers, and alternate
+their use, one for input/one for output, the roles changing on the next
+st_regex substition. At the end of substitutions  buf points to the
+one containing the final result.
+*/
+char* buf;
+char* even_buf;
+char* odd_buf;
+int even_buf_len;
+int odd_buf_len;
+};
+
+struct st_replace_regex *glob_replace_regex= 0;
+
+struct st_replace;
+struct st_replace *glob_replace= 0;
+void replace_strings_append(struct st_replace *rep, DYNAMIC_STRING* ds,
+const char *from, int len);
+
 static void cleanup_and_exit(int exit_code) __attribute__((noreturn));
 
 void die(const char *fmt, ...)
@@ -531,6 +556,7 @@ void str_to_file2(const char *fname, char *str, int size, my_bool append);
 
 void fix_win_paths(const char *val, int len);
 const char *get_errname_from_code (uint error_code);
+int multi_reg_replace(struct st_replace_regex* r,char* val);
 
 #ifdef __WIN__
 void free_tmp_sh_file();
@@ -2432,7 +2458,23 @@ void var_query_set(VAR *var, const char *query, const char** query_end)
       if (row[i])
       {
         /* Add column to tab separated string */
-	dynstr_append_mem(&result, row[i], lengths[i]);
+	char *val= row[i];
+	int len= lengths[i];
+	
+	if (glob_replace_regex)
+	{
+	  /* Regex replace */
+	  if (!multi_reg_replace(glob_replace_regex, (char*)val))
+	  {
+	    val= glob_replace_regex->buf;
+	    len= strlen(val);
+	  }
+	}
+	
+	if (glob_replace)
+	  replace_strings_append(glob_replace, &result, val, len);
+	else
+	  dynstr_append_mem(&result, val, len);
       }
       dynstr_append_mem(&result, "\t", 1);
     }
@@ -9120,16 +9162,11 @@ typedef struct st_pointer_array {		/* when using array-strings */
   uint	array_allocs,max_count,length,max_length;
 } POINTER_ARRAY;
 
-struct st_replace;
 struct st_replace *init_replace(char * *from, char * *to, uint count,
 				char * word_end_chars);
 int insert_pointer_name(reg1 POINTER_ARRAY *pa,char * name);
-void replace_strings_append(struct st_replace *rep, DYNAMIC_STRING* ds,
-                            const char *from, int len);
 void free_pointer_array(POINTER_ARRAY *pa);
 
-struct st_replace *glob_replace;
-
 /*
   Get arguments for replace. The syntax is:
   replace from to [from to ...]
@@ -9273,26 +9310,6 @@ struct st_regex
   int icase; /* true if the match is case insensitive */
 };
 
-struct st_replace_regex
-{
-  DYNAMIC_ARRAY regex_arr; /* stores a list of st_regex subsitutions */
-
-  /*
-    Temporary storage areas for substitutions. To reduce unnessary copying
-    and memory freeing/allocation, we pre-allocate two buffers, and alternate
-    their use, one for input/one for output, the roles changing on the next
-    st_regex substition. At the end of substitutions  buf points to the
-    one containing the final result.
-  */
-  char* buf;
-  char* even_buf;
-  char* odd_buf;
-  int even_buf_len;
-  int odd_buf_len;
-};
-
-struct st_replace_regex *glob_replace_regex= 0;
-
 int reg_replace(char** buf_p, int* buf_len_p, char *pattern, char *replace,
                 char *string, int icase);
 
@@ -9491,7 +9508,13 @@ void do_get_replace_regex(struct st_command *command)
 {
   char *expr= command->first_argument;
   free_replace_regex();
-  if (!(glob_replace_regex=init_replace_regex(expr)))
+  /* Allow variable for the *entire* list of replacements */
+  if (*expr == '$') 
+  {
+    VAR *val= var_get(expr, NULL, 0, 1);
+    expr= val ? val->str_val : NULL;
+  }
+  if (expr && *expr && !(glob_replace_regex=init_replace_regex(expr)))
     die("Could not init replace_regex");
   command->last_argument= command->end;
 }

mysql-test/r/mysqltest.result

@@ -549,6 +549,7 @@ mysqltest: At line 1: Wrong column number to replace_column in 'replace_column 1
 select "LONG_STRING" as x;
 x
 LONG_STRING
+dog
 mysqltest: At line 1: Invalid integer argument "10!"
 mysqltest: At line 1: Invalid integer argument "a"
 mysqltest: At line 1: Missing required argument 'connection name' to command 'connect'
@@ -662,6 +663,11 @@ a	D
 1	1
 1	4
 drop table t1;
+y
+txt
+b is b and more is more
+txt
+a is a and less is more
 create table t2 ( a char(10));
 garbage;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'garbage' at line 1

mysql-test/t/mysqltest.test

@@ -1745,6 +1745,12 @@ let $long_rep= $long_rep,$long_rep;
 --replace_result $long_rep LONG_STRING
 eval select "$long_rep" as x;
 
+# Test replace within ``
+
+--replace_result cat dog
+--let $animal= `select "cat" as pet`
+--echo $animal
+
 # ----------------------------------------------------------------------------
 # Test sync_with_master
 # ----------------------------------------------------------------------------
@@ -2065,6 +2071,23 @@ insert into t1 values (2,4);
 select * from t1;
 drop table t1;
 
+# Test usage with ``
+
+--replace_regex /x/y/
+--let $result= `select "x" as col`
+--echo $result
+
+# Test usage with a variable as pattern list
+
+--disable_query_log
+--let $patt= /a /b / /less/more/
+--replace_regex $patt
+select "a is a and less is more" as txt;
+--let $patt=
+--replace_regex $patt
+select "a is a and less is more" as txt;
+--enable_query_log
+
 #-------------------------------------------------------------------------
 # BUG #11754855 : Passing variable to --error  
 #-------------------------------------------------------------------------