diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/sql/field.h b/sql/field.h index fb985ab9930..d1fcc40ff5d 100644 --- a/sql/field.h +++ b/sql/field.h @@ -1,7 +1,7 @@ #ifndef FIELD_INCLUDED #define FIELD_INCLUDED -/* Copyright 2000-2008 MySQL AB, 2008, 2009 Sun Microsystems, Inc. +/* Copyright (c) 2000, 2010 Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -14,7 +14,7 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /* Because of the function new_field() all field classes that have static @@ -25,6 +25,12 @@ #pragma interface /* gcc class implementation */ #endif +#include "mysqld.h" /* system_charset_info */ +#include "table.h" /* TABLE */ +#include "sql_string.h" /* String */ +#include "my_decimal.h" /* my_decimal */ +#include "sql_error.h" /* MYSQL_ERROR */ + #define DATETIME_DEC 6 const uint32 max_field_size= (uint32) 4294967295U; @@ -32,6 +38,33 @@ class Send_field; class Protocol; class Create_field; class Relay_log_info; +class Field; + +enum enum_check_fields +{ + CHECK_FIELD_IGNORE, + CHECK_FIELD_WARN, + CHECK_FIELD_ERROR_FOR_NULL +}; + + +enum Derivation +{ + DERIVATION_IGNORABLE= 6, + DERIVATION_NUMERIC= 5, + DERIVATION_COERCIBLE= 4, + DERIVATION_SYSCONST= 3, + DERIVATION_IMPLICIT= 2, + DERIVATION_NONE= 1, + DERIVATION_EXPLICIT= 0 +}; + +#define STORAGE_TYPE_MASK 7 +#define COLUMN_FORMAT_MASK 7 +#define COLUMN_FORMAT_SHIFT 3 + +#define my_charset_numeric my_charset_latin1 +#define MY_REPERTOIRE_NUMERIC MY_REPERTOIRE_ASCII struct st_cache_field; int field_conv(Field *to,Field *from); @@ -57,7 +90,11 @@ public: static void operator delete(void *ptr_arg, size_t size) { TRASH(ptr_arg, size); } uchar *ptr; // Position to field in record - uchar *null_ptr; // Byte where null_bit is + /** + Byte where the @c NULL bit is stored inside a record. If this Field is a + @c NOT @c NULL field, this member is @c NULL. + */ + uchar *null_ptr; /* Note that you can use table->in_use as replacement for current_thd member only inside of val_*() and store() members (e.g. you can't use it in cons) @@ -254,6 +291,9 @@ public: inline void set_notnull(my_ptrdiff_t row_offset= 0) { if (null_ptr) null_ptr[row_offset]&= (uchar) ~null_bit; } inline bool maybe_null(void) { return null_ptr != 0 || table->maybe_null; } + /** + Signals that this field is NULL-able. + */ inline bool real_maybe_null(void) { return null_ptr != 0; } enum { |