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#ifndef DRIZZLE_SERVER_FIELD_NULL
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#define DRIZZLE_SERVER_FIELD_NULL
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#include "mysql_priv.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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static unsigned char null[1];
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Field_null(unsigned char *ptr_arg, uint32_t len_arg,
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Field_null(uchar *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 *to __attribute__((unused)),
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uint32_t length __attribute__((unused)),
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const CHARSET_INFO * const cs __attribute__((unused)))
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{ null[0]=1; return 0; }
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int store(double nr __attribute__((unused)))
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{ null[0]=1; return 0; }
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int store(int64_t nr __attribute__((unused)),
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bool unsigned_val __attribute__((unused)))
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{ null[0]=1; return 0; }
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int store_decimal(const my_decimal *d __attribute__((unused)))
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enum_field_types type() const { return MYSQL_TYPE_NULL;}
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int store(const char *to __attribute__((__unused__)),
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uint length __attribute__((__unused__)),
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CHARSET_INFO *cs __attribute__((__unused__)))
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{ null[0]=1; return 0; }
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int store(double nr __attribute__((__unused__)))
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{ null[0]=1; return 0; }
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int store(int64_t nr __attribute__((__unused__)),
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bool unsigned_val __attribute__((__unused__)))
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{ null[0]=1; return 0; }
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int store_decimal(const my_decimal *d __attribute__((__unused__)))
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{ null[0]=1; return 0; }
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int64_t val_int(void)
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my_decimal *val_decimal(my_decimal *) { return 0; }
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String *val_str(String *value __attribute__((unused)),
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String *val_str(String *value __attribute__((__unused__)),
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{ value2->length(0); return value2;}
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int cmp(const unsigned char *a __attribute__((unused)),
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const unsigned char *b __attribute__((unused))) { return 0;}
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void sort_string(unsigned char *buff __attribute__((unused)),
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uint32_t length __attribute__((unused))) {}
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int cmp(const uchar *a __attribute__((__unused__)),
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const uchar *b __attribute__((__unused__))) { return 0;}
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void sort_string(uchar *buff __attribute__((__unused__)),
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uint length __attribute__((__unused__))) {}
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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 { return sizeof(*this); }
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uint size_of() const { return sizeof(*this); }
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uint32_t max_display_length() { return 4; }