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/* This implements 'user defined functions' */
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#include <drizzled/server_includes.h>
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#include <libdrizzle/gettext.h>
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#include <drizzled/gettext.h>
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#include <drizzled/sql_udf.h>
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static bool udf_startup= false; /* We do not lock because startup is single threaded */
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extern "C" unsigned char* get_hash_key(const unsigned char *buff, size_t *length,
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bool not_used __attribute__((unused)))
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udf_func *udf= (udf_func*) buff;
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*length= (uint) udf->name.length;
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return (unsigned char*) udf->name.str;
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init_sql_alloc(&mem, UDF_ALLOC_BLOCK_SIZE, 0);
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if (hash_init(&udf_hash, system_charset_info, 32, 0, 0, get_hash_key, NULL, 0))
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sql_print_error(_("Can't allocate memory for udf structures"));
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free_root(&mem, MYF(0));
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/* called by mysqld.cc clean_up() */
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free_root(&mem, MYF(0));
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static map<string, Function_builder *> udf_map;
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/* This is only called if using_udf_functions != 0 */
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udf_func *find_udf(const char *name, uint32_t length)
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Function_builder *find_udf(const char *name, uint32_t length)
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* @todo: check without transform, then check with transform if needed
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Function_builder *udf= NULL;
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if (udf_startup == false)
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udf= (udf_func*) hash_search(&udf_hash,
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(unsigned char*) name,
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length ? length : (uint) strlen(name));
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string find_str(name, length);
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transform(find_str.begin(), find_str.end(),
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find_str.begin(), ::tolower);
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map<string, Function_builder *>::iterator find_iter;
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find_iter= udf_map.find(find_str);
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if (find_iter != udf_map.end())
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udf= (*find_iter).second;
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static bool add_udf(udf_func *udf)
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static bool add_udf(Function_builder *udf)
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if (my_hash_insert(&udf_hash, (unsigned char*) udf))
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* @todo: add all lower and all upper version
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string add_str= udf->get_name();
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transform(add_str.begin(), add_str.end(),
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add_str.begin(), ::tolower);
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udf_map[add_str]= udf;
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using_udf_functions= 1;
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int initialize_udf(st_plugin_int *plugin)
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if (udf_startup == false)
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if (plugin->plugin->init)
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if ((r= plugin->plugin->init((void *)&f)))
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sql_print_error("Plugin '%s' init function returned error %d.",
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errmsg_printf(ERRMSG_LVL_ERROR,
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_("Plugin '%s' init function returned error %d."),
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int finalize_udf(st_plugin_int *plugin)
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udf_func *udff = (udf_func *)plugin->data;
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Function_builder *udff = (Function_builder *)plugin->data;
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/* TODO: Issue warning on failure */
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if (udff && plugin->plugin->deinit)