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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef DRIZZLED_FIELD_NULL_H
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#define DRIZZLED_FIELD_NULL_H
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#ifndef DRIZZLE_SERVER_FIELD_NULL
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#define DRIZZLE_SERVER_FIELD_NULL
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#include <drizzled/field/str.h>
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* Everything saved in this will disappear. It will always return NULL
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class Field_null :public Field_str
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class Field_null :public Field_str {
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static unsigned char null[1];
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using Field::val_int;
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Field_null(unsigned char *ptr_arg,
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const char *field_name_arg,
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const CHARSET_INFO * const cs)
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enum_field_types type() const
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return DRIZZLE_TYPE_NULL;
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Field_null(unsigned char *ptr_arg, uint32_t len_arg,
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enum utype unireg_check_arg, const char *field_name_arg,
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const CHARSET_INFO * const cs)
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:Field_str(ptr_arg, len_arg, null, 1,
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unireg_check_arg, field_name_arg, cs)
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enum_field_types type() const { return DRIZZLE_TYPE_NULL;}
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int store(const char *, uint32_t, const CHARSET_INFO * const)
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{ null[0]=1; return 0; }
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{ null[0]=1; return 0; }
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int store(int64_t, bool)
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{ null[0]=1; return 0; }
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int store_decimal(const my_decimal *)
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{ null[0]=1; return 0; }
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double val_real(void)
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int64_t val_int(void)
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my_decimal *val_decimal(my_decimal *)
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my_decimal *val_decimal(my_decimal *) { return 0; }
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String *val_str(String *, String *value2)
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int cmp(const unsigned char *, const unsigned char *)
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void sort_string(unsigned char *, uint32_t)
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uint32_t pack_length() const
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{ value2->length(0); return value2;}
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int cmp(const unsigned char *, const unsigned char *) { return 0;}
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void sort_string(unsigned char *, uint32_t) {}
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uint32_t pack_length() const { return 0; }
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void sql_type(String &str) const;
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uint32_t size_of() const
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return sizeof(*this);
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uint32_t max_display_length()
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uint32_t size_of() const { return sizeof(*this); }
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uint32_t max_display_length() { return 4; }
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} /* namespace drizzled */
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#endif /* DRIZZLED_FIELD_NULL_H */