Type:
Task
Priority:
Major
Resolution:
Fixed
User defined type plugins and new built-in types (implemented as always-built-in plugins) will want to do CAST.
This task will add infrastructure for such casts.
Let's add this branch into the cast_type grammar rules:
| IDENT_sys
{
const Type_handler *h;
if (!(h= Type_handler::handler_by_name_or_error($1)))
MYSQL_YYABORT;
$$.set(h);
Lex->charset= NULL;
}
Note, the GEOMETRY data types (which is as of time of writing 95% plugin compatible) does not support CAST for now. So for test purposes let's override the relevant method as follows:
Item *
Type_handler_geometry::create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr)
const
{
DBUG_EXECUTE_IF( "emulate_geometry_create_typecast_item" ,
return new (thd->mem_root) Item_func_geometry_from_text(thd, item);
);
return NULL;
}
blocks
MDEV-4912
Data type plugin API version 1
Closed
There are no comments yet on this issue.
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