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8ee6d33bdd
(aka "deinit is not called when calling udf from trigger"). We should call udf_deinit() function during cleanup phase after prepared (or ordinary) statement execution instead of calling it from Item's desctructor. No test case is provided since it is hard to test UDF's from our test suite.
136 lines
3.6 KiB
C++
136 lines
3.6 KiB
C++
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* This file defines structures needed by udf functions */
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#ifdef __GNUC__
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#pragma interface
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#endif
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enum Item_udftype {UDFTYPE_FUNCTION=1,UDFTYPE_AGGREGATE};
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typedef struct st_udf_func
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{
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LEX_STRING name;
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Item_result returns;
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Item_udftype type;
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char *dl;
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void *dlhandle;
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void *func;
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void *func_init;
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void *func_deinit;
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void *func_clear;
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void *func_add;
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ulong usage_count;
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} udf_func;
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class Item_result_field;
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struct st_table_list;
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class udf_handler :public Sql_alloc
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{
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protected:
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udf_func *u_d;
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String *buffers;
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UDF_ARGS f_args;
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UDF_INIT initid;
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char *num_buffer;
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uchar error, is_null;
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bool initialized;
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Item **args;
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public:
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table_map used_tables_cache;
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bool const_item_cache;
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bool not_original;
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udf_handler(udf_func *udf_arg) :u_d(udf_arg), buffers(0), error(0),
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is_null(0), initialized(0), not_original(0)
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{}
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~udf_handler();
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const char *name() const { return u_d ? u_d->name.str : "?"; }
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Item_result result_type () const
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{ return u_d ? u_d->returns : STRING_RESULT;}
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bool get_arguments();
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bool fix_fields(THD *thd,struct st_table_list *tlist,Item_result_field *item,
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uint arg_count,Item **args);
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void cleanup();
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double val(my_bool *null_value)
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{
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if (get_arguments())
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{
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*null_value=1;
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return 0.0;
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}
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double (*func)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)=
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(double (*)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)) u_d->func;
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double tmp=func(&initid, &f_args, &is_null, &error);
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if (is_null || error)
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{
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*null_value=1;
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return 0.0;
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}
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*null_value=0;
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return tmp;
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}
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longlong val_int(my_bool *null_value)
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{
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if (get_arguments())
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{
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*null_value=1;
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return LL(0);
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}
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longlong (*func)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)=
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(longlong (*)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)) u_d->func;
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longlong tmp=func(&initid, &f_args, &is_null, &error);
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if (is_null || error)
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{
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*null_value=1;
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return LL(0);
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}
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*null_value=0;
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return tmp;
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}
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void clear()
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{
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is_null= 0;
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void (*func)(UDF_INIT *, uchar *, uchar *)=
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(void (*)(UDF_INIT *, uchar *, uchar *)) u_d->func_clear;
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func(&initid, &is_null, &error);
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}
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void add(my_bool *null_value)
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{
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if (get_arguments())
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{
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*null_value=1;
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return;
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}
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void (*func)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)=
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(void (*)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)) u_d->func_add;
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func(&initid, &f_args, &is_null, &error);
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*null_value= (my_bool) (is_null || error);
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}
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String *val_str(String *str,String *save_str);
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};
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#ifdef HAVE_DLOPEN
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void udf_init(void),udf_free(void);
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udf_func *find_udf(const char *name, uint len=0,bool mark_used=0);
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void free_udf(udf_func *udf);
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int mysql_create_function(THD *thd,udf_func *udf);
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int mysql_drop_function(THD *thd,const LEX_STRING *name);
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#endif
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