Add replace_regex to not ignore the regex in "$var /regex/val/"

client/mysqltest.cc

@@ -9891,25 +9891,39 @@ bool parse_re_part(char *start_re, char *end_re,
 
   Returns: st_replace_regex struct with pairs of substitutions
 */
+void append_replace_regex(char*, char*, struct st_replace_regex*, char**);
 
 struct st_replace_regex* init_replace_regex(char* expr)
 {
+  char *expr_end, *buf_p;
   struct st_replace_regex* res;
-  char* buf,*expr_end;
-  char* p, start_re, end_re= 1;
-  char* buf_p;
   uint expr_len= strlen(expr);
-  struct st_regex reg;
 
   /* my_malloc() will die on fail with MY_FAE */
   res=(struct st_replace_regex*)my_malloc(
-                                          sizeof(*res)+expr_len ,MYF(MY_FAE+MY_WME));
+                                          sizeof(*res)+8192 ,MYF(MY_FAE+MY_WME));
   my_init_dynamic_array(&res->regex_arr,sizeof(struct st_regex), 128, 128, MYF(0));
 
-  buf= (char*)res + sizeof(*res);
   expr_end= expr + expr_len;
+  buf_p= (char*)res + sizeof(*res);
+  append_replace_regex(expr, expr_end, res, &buf_p);
+
+  res->odd_buf_len= res->even_buf_len= 8192;
+  res->even_buf= (char*)my_malloc(res->even_buf_len,MYF(MY_WME+MY_FAE));
+  res->odd_buf= (char*)my_malloc(res->odd_buf_len,MYF(MY_WME+MY_FAE));
+  res->buf= res->even_buf;
+
+  return res;
+}
+
+
+void append_replace_regex(char* expr, char *expr_end, struct st_replace_regex* res,
+                          char **buf_p)
+{
+  char* p, start_re, end_re= 1;
+  struct st_regex reg;
+
   p= expr;
-  buf_p= buf;
 
   /* for each regexp substitution statement */
   while (p < expr_end)
@@ -9928,13 +9942,34 @@ struct st_replace_regex* init_replace_regex(char* expr)
     }
 
     start_re= 0;
-    reg.pattern= buf_p;
-    if (parse_re_part(&start_re, &end_re, &p, expr_end, &buf_p))
-      goto err;
+    reg.pattern= *buf_p;
 
-    reg.replace= buf_p;
-    if (parse_re_part(&start_re, &end_re, &p, expr_end, &buf_p))
-      goto err;
+    /* Allow variable for the *entire* list of replacements */
+    if (*p == '$')
+    {
+      const char *v_end;
+      VAR *val= var_get(p, &v_end, 0, 1);
+
+      if (val)
+      {
+        char *expr, *expr_end;
+        expr= val->str_val;
+        expr_end= expr + val->str_val_len;
+        append_replace_regex(expr, expr_end, res, buf_p);
+      }
+
+      p= (char *) v_end + 1;
+      continue;
+    }
+    else
+    {
+      if (parse_re_part(&start_re, &end_re, &p, expr_end, buf_p))
+        goto err;
+
+      reg.replace= *buf_p;
+      if (parse_re_part(&start_re, &end_re, &p, expr_end, buf_p))
+        goto err;
+    }
 
     /* Check if we should do matching case insensitive */
     if (p < expr_end && *p == 'i')
@@ -9947,17 +9982,12 @@ struct st_replace_regex* init_replace_regex(char* expr)
     if (insert_dynamic(&res->regex_arr,(uchar*) &reg))
       die("Out of memory");
   }
-  res->odd_buf_len= res->even_buf_len= 8192;
-  res->even_buf= (char*)my_malloc(res->even_buf_len,MYF(MY_WME+MY_FAE));
-  res->odd_buf= (char*)my_malloc(res->odd_buf_len,MYF(MY_WME+MY_FAE));
-  res->buf= res->even_buf;
 
-  return res;
+  return;
 
 err:
   my_free(res);
   die("Error parsing replace_regex \"%s\"", expr);
-  return 0;
 }
 
 /*
@@ -10037,12 +10067,6 @@ void do_get_replace_regex(struct st_command *command)
 {
   char *expr= command->first_argument;
   free_replace_regex();
-  /* 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

@@ -672,7 +672,9 @@ drop table t1;
 y
 txt
 b is b and more is more
-txt
+txt2
+b is b or more is more
+txt3
 a is a and less is more
 sflfdt 'ABCDfF bbddff h' bs txt;
 txt

mysql-test/t/mysqltest.test

@@ -2084,9 +2084,11 @@ drop table t1;
 --let $patt= /a /b / /less/more/
 --replace_regex $patt
 select "a is a and less is more" as txt;
+--replace_regex $patt /and /or /
+select "a is a and less is more" as txt2;
 --let $patt=
 --replace_regex $patt
-select "a is a and less is more" as txt;
+select "a is a and less is more" as txt3;
 --enable_query_log
 
 #