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MDEV-31174 New class Native_functions_hash

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This commit is contained in:
Alexander Barkov
2023-04-28 14:41:27 +04:00
parent 9b6f87b62a
commit 01ea779149
7 changed files with 101 additions and 53 deletions
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57
sql/item_create.h
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@@ -144,16 +144,6 @@ protected:
};
/**
Find the native function builder associated with a given function name.
@param thd The current thread
@param name The native function name
@return The native function builder associated with the name, or NULL
*/
extern Create_func *find_native_function_builder(THD *thd,
const LEX_CSTRING *name);
/**
Find the function builder for qualified functions.
@param thd The current thread
@@ -200,9 +190,52 @@ struct Native_func_registry
Create_func *builder;
};
class Native_functions_hash: public HASH
{
public:
Native_functions_hash()
{
bzero(this, sizeof(*this));
}
~Native_functions_hash()
{
/*
No automatic free because objects of this type
are expected to be declared statically.
The code in cleanup() calls my_hash_free() which may not work correctly
at the very end of mariadbd shutdown.
The the upper level code should call cleanup() explicitly.
Unfortunatelly, it's not possible to use DBUG_ASSERT(!records) here,
because the server terminates using exit() in some cases,
e.g. in the test main.named_pipe with the "Create named pipe failed"
error.
*/
}
bool init(size_t count);
bool init(const Native_func_registry array[], size_t count)
{
return init(count) || append(array);
}
bool append(const Native_func_registry array[]);
bool remove(const Native_func_registry array[]);
void cleanup();
/**
Find the native function builder associated with a given function name.
@param thd The current thread
@param name The native function name
@return The native function builder associated with the name, or NULL
*/
Create_func *find(THD *thd, const LEX_CSTRING &name) const;
};
extern MYSQL_PLUGIN_IMPORT Native_functions_hash native_functions_hash;
extern const Native_func_registry func_array[];
extern const size_t func_array_length;
int item_create_init();
int item_create_append(Native_func_registry array[]);
int item_create_remove(Native_func_registry array[]);
void item_create_cleanup();
Item *create_func_dyncol_create(THD *thd, List<DYNCALL_CREATE_DEF> &list);