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4162e009cb
Problem: When creating a temporary field for a temporary table in create_tmp_field_from_field(), a resulting field is created as an exact copy of an original one (in Field::new_field()). However, Field_enum and Field_set contain a pointer (typelib) to memory allocated in the parent table's MEM_ROOT, which under some circumstances may be deallocated later by the time a temporary table is used. Solution: Override the new_field() method for Field_enum and Field_set and create a separate copy of the typelib structure in there.
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* Copyright (C) 2000 MySQL 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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#ifndef _typelib_h
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#define _typelib_h
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#include "my_alloc.h"
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typedef struct st_typelib { /* Different types saved here */
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unsigned int count; /* How many types */
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const char *name; /* Name of typelib */
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const char **type_names;
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unsigned int *type_lengths;
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} TYPELIB;
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extern int find_type(char *x,TYPELIB *typelib,unsigned int full_name);
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extern void make_type(char *to,unsigned int nr,TYPELIB *typelib);
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extern const char *get_type(TYPELIB *typelib,unsigned int nr);
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extern TYPELIB *copy_typelib(MEM_ROOT *root, TYPELIB *from);
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extern TYPELIB sql_protocol_typelib;
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#endif /* _typelib_h */
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