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/* - mode: c++ c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 MySQL
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef DRIZZLE_SERVER_FIELD_VARSTRING
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#define DRIZZLE_SERVER_FIELD_VARSTRING
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class Field_varstring :public Field_longstr {
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The maximum space available in a Field_varstring, in bytes. See
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static const uint32_t MAX_SIZE;
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/* Store number of bytes used to store length (1 or 2) */
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uint32_t length_bytes;
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Field_varstring(unsigned char *ptr_arg,
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uint32_t len_arg, uint32_t length_bytes_arg,
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unsigned char *null_ptr_arg, unsigned char null_bit_arg,
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enum utype unireg_check_arg, const char *field_name_arg,
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TABLE_SHARE *share, const CHARSET_INFO * const cs)
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:Field_longstr(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
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unireg_check_arg, field_name_arg, cs),
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length_bytes(length_bytes_arg)
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share->varchar_fields++;
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Field_varstring(uint32_t len_arg,bool maybe_null_arg,
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const char *field_name_arg,
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TABLE_SHARE *share, const CHARSET_INFO * const cs)
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:Field_longstr((unsigned char*) 0,len_arg, maybe_null_arg ? (unsigned char*) "": 0, 0,
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NONE, field_name_arg, cs),
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length_bytes(len_arg < 256 ? 1 :2)
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share->varchar_fields++;
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enum_field_types type() const { return DRIZZLE_TYPE_VARCHAR; }
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enum ha_base_keytype key_type() const;
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uint32_t row_pack_length() { return field_length; }
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bool zero_pack() const { return 0; }
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int reset(void) { memset(ptr, 0, field_length+length_bytes); return 0; }
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uint32_t pack_length() const { return (uint32_t) field_length+length_bytes; }
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uint32_t key_length() const { return (uint32_t) field_length; }
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uint32_t sort_length() const
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return (uint32_t) field_length + (field_charset == &my_charset_bin ?
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int store(const char *to,uint32_t length, const CHARSET_INFO * const charset);
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int store(int64_t nr, bool unsigned_val);
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int store(double nr) { return Field_str::store(nr); } /* QQ: To be deleted */
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double val_real(void);
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int64_t val_int(void);
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String *val_str(String*,String *);
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my_decimal *val_decimal(my_decimal *);
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int cmp_max(const unsigned char *, const unsigned char *, uint32_t max_length);
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int cmp(const unsigned char *a,const unsigned char *b)
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return cmp_max(a, b, UINT32_MAX);
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void sort_string(unsigned char *buff,uint32_t length);
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uint32_t get_key_image(unsigned char *buff,uint32_t length, imagetype type);
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void set_key_image(const unsigned char *buff,uint32_t length);
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void sql_type(String &str) const;
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virtual unsigned char *pack(unsigned char *to, const unsigned char *from,
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uint32_t max_length, bool low_byte_first);
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unsigned char *pack_key(unsigned char *to, const unsigned char *from, uint32_t max_length, bool low_byte_first);
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unsigned char *pack_key_from_key_image(unsigned char* to, const unsigned char *from,
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uint32_t max_length, bool low_byte_first);
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virtual const unsigned char *unpack(unsigned char* to, const unsigned char *from,
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uint32_t param_data, bool low_byte_first);
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const unsigned char *unpack_key(unsigned char* to, const unsigned char *from,
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uint32_t max_length, bool low_byte_first);
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int pack_cmp(const unsigned char *a, const unsigned char *b, uint32_t key_length,
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bool insert_or_update);
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int pack_cmp(const unsigned char *b, uint32_t key_length,bool insert_or_update);
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int cmp_binary(const unsigned char *a,const unsigned char *b, uint32_t max_length=UINT32_MAX);
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int key_cmp(const unsigned char *,const unsigned char*);
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int key_cmp(const unsigned char *str, uint32_t length);
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uint32_t packed_col_length(const unsigned char *to, uint32_t length);
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uint32_t max_packed_col_length(uint32_t max_length);
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uint32_t data_length();
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uint32_t used_length();
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uint32_t size_of() const { return sizeof(*this); }
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enum_field_types real_type() const { return DRIZZLE_TYPE_VARCHAR; }
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bool has_charset(void) const
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{ return charset() == &my_charset_bin ? false : true; }
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Field *new_field(MEM_ROOT *root, Table *new_table, bool keep_type);
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Field *new_key_field(MEM_ROOT *root, Table *new_table,
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unsigned char *new_ptr, unsigned char *new_null_ptr,
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uint32_t new_null_bit);
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uint32_t is_equal(Create_field *new_field);
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void hash(uint32_t *nr, uint32_t *nr2);
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int do_save_field_metadata(unsigned char *first_byte);