MDEV-32583 UUID() should be treated as stochastic for the purposes of forcing query materialization

grooverdan · vuvova · commit ae69ac204af1 · 2024-10-29T14:47:32.000+01:00
Port 9e800ed changing lex->safe_to_cache_query to lex->uncacheable(UNCACHEABLE_RAND).
diff --git a/plugin/type_uuid/plugin.cc b/plugin/type_uuid/plugin.cc
@@ -150,7 +150,7 @@ class Create_func_uuid_v4 : public Create_func_arg0
   {
     DBUG_ENTER("Create_func_uuid_v4::create");
     thd->lex->set_stmt_unsafe(LEX::BINLOG_STMT_UNSAFE_SYSTEM_FUNCTION);
-    thd->lex->safe_to_cache_query= 0;
+    thd->lex->uncacheable(UNCACHEABLE_RAND);
     DBUG_RETURN(new (thd->mem_root) Item_func_uuid_v4(thd));
   }
   static Create_func_uuid_v4 s_singleton;
@@ -241,4 +241,4 @@ maria_declare_plugin(type_uuid)
   "1.0",                        // String version representation
   MariaDB_PLUGIN_MATURITY_EXPERIMENTAL// Maturity(see include/mysql/plugin.h)*/
 }
-maria_declare_plugin_end;
+maria_declare_plugin_end;

Original file line number	Diff line number	Diff line change
`@@ -150,7 +150,7 @@ class Create_func_uuid_v4 : public Create_func_arg0`
`150`	`150`	`{`
`151`	`151`	`DBUG_ENTER("Create_func_uuid_v4::create");`
`152`	`152`	`thd->lex->set_stmt_unsafe(LEX::BINLOG_STMT_UNSAFE_SYSTEM_FUNCTION);`
`153`		`- thd->lex->safe_to_cache_query= 0;`
	`153`	`+ thd->lex->uncacheable(UNCACHEABLE_RAND);`
`154`	`154`	`DBUG_RETURN(new (thd->mem_root) Item_func_uuid_v4(thd));`
`155`	`155`	`}`
`156`	`156`	`static Create_func_uuid_v4 s_singleton;`
`@@ -241,4 +241,4 @@ maria_declare_plugin(type_uuid)`
`241`	`241`	`"1.0", // String version representation`
`242`	`242`	`MariaDB_PLUGIN_MATURITY_EXPERIMENTAL// Maturity(see include/mysql/plugin.h)*/`
`243`	`243`	`}`
`244`		`-maria_declare_plugin_end;`
	`244`	`+maria_declare_plugin_end;`