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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 Sun Microsystems, Inc.
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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; version 2 of the License.
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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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/* Copyright (C) 2000-2006 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; version 2 of the License.
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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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Because of the function new_field() all field classes that have static
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variables must declare the size_of() member function.
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#ifndef DRIZZLED_FIELD_H
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#define DRIZZLED_FIELD_H
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#include "drizzled/sql_error.h"
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#include "drizzled/type/decimal.h"
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#include "drizzled/key_map.h"
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#include "drizzled/sql_list.h"
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#include "drizzled/structs.h"
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#include "drizzled/charset_info.h"
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#include "drizzled/item_result.h"
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#include "drizzled/charset_info.h"
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#include "drizzled/visibility.h"
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#define DATETIME_DEC 6
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#define DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE FLOATING_POINT_BUFFER
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#define ASSERT_COLUMN_MARKED_FOR_READ assert(!getTable() || (getTable()->read_set == NULL || isReadSet()))
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#define ASSERT_COLUMN_MARKED_FOR_WRITE assert(!getTable() || (getTable()->write_set == NULL || isWriteSet()))
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#define ASSERT_COLUMN_MARKED_FOR_READ assert(getTable())
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#define ASSERT_COLUMN_MARKED_FOR_WRITE assert(getTable())
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typedef struct st_typelib TYPELIB;
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const uint32_t max_field_size= (uint32_t) 4294967295U;
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struct st_cache_field;
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int field_conv(Field *to,Field *from);
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* Class representing a Field in a Table
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* The value stored in the Field object is stored in the
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* unsigned char pointer member variable called ptr. The
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* val_xxx() methods retrieve this raw byte value and
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* convert the byte into the appropriate output (int, decimal, etc).
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* The store_xxx() methods take various input and convert
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* the input into the raw bytes stored in the ptr member variable.
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class DRIZZLED_API Field
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/* Prevent use of these */
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inline uint get_enum_pack_length(int elements)
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return elements < 256 ? 1 : 2;
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inline uint get_set_pack_length(int elements)
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uint len= (elements + 7) / 8;
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return len > 4 ? 8 : len;
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Field(const Item &); /* Prevent use of these */
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void operator=(Field &);
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unsigned char *ptr; /**< Position to field in record. Stores raw field value */
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unsigned char *null_ptr; /**< Byte where null_bit is */
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* Pointer to the Table object containing this Field
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* @note You can use table->in_use as replacement for current_session member
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* only inside of val_*() and store() members (e.g. you can't use it in cons)
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Table *getTable() const
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void setTable(Table *table_arg)
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Table *orig_table; /**< Pointer to the original Table. @TODO What is "the original table"? */
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const char *field_name; /**< Name of the field */
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LEX_STRING comment; /**< A comment about the field */
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/** The field is part of the following keys */
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key_map part_of_key_not_clustered;
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key_map part_of_sortkey;
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static void *operator new(size_t size) {return sql_alloc(size); }
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static void operator delete(void *ptr_arg __attribute__((unused)),
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size_t size __attribute__((unused)))
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{ TRASH(ptr_arg, size); }
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uchar *ptr; // Position to field in record
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uchar *null_ptr; // Byte where null_bit is
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We use three additional unireg types for TIMESTAMP for hysterical
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raisins and limitations in the MySQL FRM file format.
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A good TODO is to clean this up as we can support just about
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anything in the table proto message now.
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uint32_t field_length; /**< Length of this field in bytes */
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bool isUnsigned() const
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return flags & UNSIGNED_FLAG;
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uint16_t field_index; /**< Index of this Field in Table::fields array */
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uint16_t position() const
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void setPosition(uint32_t arg)
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unsigned char null_bit; /**< Bit used to test null bit */
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Note that you can use table->in_use as replacement for current_thd member
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only inside of val_*() and store() members (e.g. you can't use it in cons)
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struct st_table *table; // Pointer for table
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struct st_table *orig_table; // Pointer to original table
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const char **table_name, *field_name;
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/* Field is part of the following keys */
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key_map key_start, part_of_key, part_of_key_not_clustered;
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key_map part_of_sortkey;
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We use three additional unireg types for TIMESTAMP to overcome limitation
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of current binary format of .frm file. We'd like to be able to support
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NOW() as default and on update value for such fields but unable to hold
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this info anywhere except unireg_check field. This issue will be resolved
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in more clean way with transition to new text based .frm format.
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See also comment for Field_timestamp::Field_timestamp().
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enum utype { NONE,DATE,SHIELD,NOEMPTY,CASEUP,PNR,BGNR,PGNR,YES,NO,REL,
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CHECK,EMPTY,UNKNOWN_FIELD,CASEDN,NEXT_NUMBER,INTERVAL_FIELD,
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BIT_FIELD, TIMESTAMP_OLD_FIELD, CAPITALIZE, BLOB_FIELD,
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TIMESTAMP_DN_FIELD, TIMESTAMP_UN_FIELD, TIMESTAMP_DNUN_FIELD};
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enum imagetype { itRAW, itMBR};
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uint32_t field_length; // Length of field
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uint16_t field_index; // field number in fields array
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uchar null_bit; // Bit used to test null bit
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If true, this field was created in create_tmp_field_from_item from a NULL
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value. This means that the type of the field is just a guess, and the type
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@return Maximum data length of the field when packed using the
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Field::pack() function.
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virtual uint32_t max_data_length() const;
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virtual int reset(void);
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virtual void reset_fields();
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virtual void set_default();
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virtual bool binary() const;
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virtual bool zero_pack() const;
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virtual enum ha_base_keytype key_type() const;
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virtual uint32_t key_length() const;
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virtual uint32_t max_data_length() const {
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return pack_length();
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virtual int reset(void) { memset(ptr, 0, pack_length()); return 0; }
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virtual void reset_fields() {}
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virtual void set_default()
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my_ptrdiff_t l_offset= (my_ptrdiff_t) (table->s->default_values - table->record[0]);
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memcpy(ptr, ptr + l_offset, pack_length());
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*null_ptr= ((*null_ptr & (uchar) ~null_bit) | (null_ptr[l_offset] & null_bit));
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virtual bool binary() const { return 1; }
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virtual bool zero_pack() const { return 1; }
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virtual enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
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virtual uint32_t key_length() const { return pack_length(); }
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virtual enum_field_types type() const =0;
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virtual enum_field_types real_type() const;
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virtual int cmp_max(const unsigned char *a, const unsigned char *b, uint32_t max_len);
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virtual int cmp(const unsigned char *,const unsigned char *)=0;
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int cmp_internal(const unsigned char *str) { return cmp(ptr,str); }
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virtual int cmp_binary(const unsigned char *a,const unsigned char *b,
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uint32_t max_length=UINT32_MAX);
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virtual int cmp_offset(uint32_t row_offset);
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virtual int cmp_binary_offset(uint32_t row_offset);
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virtual int key_cmp(const unsigned char *a,const unsigned char *b);
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virtual int key_cmp(const unsigned char *str, uint32_t length);
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virtual uint32_t decimals() const;
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virtual enum_field_types real_type() const { return type(); }
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inline int cmp(const uchar *str) { return cmp(ptr,str); }
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virtual int cmp_max(const uchar *a, const uchar *b,
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uint max_len __attribute__((unused)))
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{ return cmp(a, b); }
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virtual int cmp(const uchar *,const uchar *)=0;
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virtual int cmp_binary(const uchar *a,const uchar *b,
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uint32_t __attribute__((unused)) max_length=~0)
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{ return memcmp(a,b,pack_length()); }
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virtual int cmp_offset(uint row_offset)
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{ return cmp(ptr,ptr+row_offset); }
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virtual int cmp_binary_offset(uint row_offset)
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{ return cmp_binary(ptr, ptr+row_offset); };
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virtual int key_cmp(const uchar *a,const uchar *b)
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{ return cmp(a, b); }
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virtual int key_cmp(const uchar *str, uint length __attribute__((unused)))
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{ return cmp(ptr,str); }
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virtual uint decimals() const { return 0; }
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Caller beware: sql_type can change str.Ptr, so check
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ptr() to see if it changed if you are using your own buffer
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in str and restore it with set() if needed
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virtual void sql_type(String &str) const =0;
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virtual uint32_t size_of() const =0;
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bool is_null(ptrdiff_t row_offset= 0);
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bool is_real_null(ptrdiff_t row_offset= 0);
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bool is_null_in_record(const unsigned char *record);
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bool is_null_in_record_with_offset(ptrdiff_t offset);
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void set_null(ptrdiff_t row_offset= 0);
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void set_notnull(ptrdiff_t row_offset= 0);
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bool maybe_null(void);
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bool real_maybe_null(void);
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virtual void make_field(SendField *);
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virtual void sort_string(unsigned char *buff,uint32_t length)=0;
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virtual bool optimize_range(uint32_t idx, uint32_t part);
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* Returns true for fields which, when compared with constant
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* items, can be casted to int64_t. In this case we will at 'fix_fields'
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* stage cast the constant items to int64_ts and at the execution stage
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* use field->val_int() for comparison. Used to optimize clauses like
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* 'a_column BETWEEN date_const AND date_const'.
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virtual uint size_of() const =0; // For new field
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inline bool is_null(my_ptrdiff_t row_offset= 0)
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{ return null_ptr ? (null_ptr[row_offset] & null_bit ? 1 : 0) : table->null_row; }
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inline bool is_real_null(my_ptrdiff_t row_offset= 0)
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{ return null_ptr ? (null_ptr[row_offset] & null_bit ? 1 : 0) : 0; }
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inline bool is_null_in_record(const uchar *record)
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return test(record[(uint) (null_ptr -table->record[0])] &
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inline bool is_null_in_record_with_offset(my_ptrdiff_t offset)
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return test(null_ptr[offset] & null_bit);
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inline void set_null(my_ptrdiff_t row_offset= 0)
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{ if (null_ptr) null_ptr[row_offset]|= null_bit; }
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inline void set_notnull(my_ptrdiff_t row_offset= 0)
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{ if (null_ptr) null_ptr[row_offset]&= (uchar) ~null_bit; }
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inline bool maybe_null(void) { return null_ptr != 0 || table->maybe_null; }
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inline bool real_maybe_null(void) { return null_ptr != 0; }
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LAST_NULL_BYTE_UNDEF= 0
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Find the position of the last null byte for the field.
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Return a pointer to the last byte of the null bytes where the
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field conceptually is placed.
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The position of the last null byte relative to the beginning of
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the record. If the field does not use any bits of the null
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bytes, the value 0 (LAST_NULL_BYTE_UNDEF) is returned.
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virtual bool can_be_compared_as_int64_t() const
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size_t last_null_byte() const {
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size_t bytes= do_last_null_byte();
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assert(bytes <= table->s->null_bytes);
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virtual void make_field(Send_field *);
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virtual void sort_string(uchar *buff,uint length)=0;
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virtual bool optimize_range(uint idx, uint part);
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This should be true for fields which, when compared with constant
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items, can be casted to int64_t. In this case we will at 'fix_fields'
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stage cast the constant items to int64_ts and at the execution stage
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use field->val_int() for comparison. Used to optimize clauses like
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'a_column BETWEEN date_const, date_const'.
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virtual bool can_be_compared_as_int64_t() const { return false; }
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virtual void free() {}
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virtual Field *new_field(memory::Root *root,
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virtual Field *new_field(MEM_ROOT *root, struct st_table *new_table,
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virtual Field *new_key_field(memory::Root *root, Table *new_table,
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unsigned char *new_ptr,
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unsigned char *new_null_ptr,
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uint32_t new_null_bit);
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/** This is used to generate a field in Table from TableShare */
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Field *clone(memory::Root *mem_root, Table *new_table);
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void move_field(unsigned char *ptr_arg,unsigned char *null_ptr_arg,unsigned char null_bit_arg)
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virtual Field *new_key_field(MEM_ROOT *root, struct st_table *new_table,
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uchar *new_ptr, uchar *new_null_ptr,
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Field *clone(MEM_ROOT *mem_root, struct st_table *new_table);
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inline void move_field(uchar *ptr_arg,uchar *null_ptr_arg,uchar null_bit_arg)
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null_ptr= null_ptr_arg;
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null_bit= null_bit_arg;
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ptr=ptr_arg; null_ptr=null_ptr_arg; null_bit=null_bit_arg;
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void move_field(unsigned char *ptr_arg) { ptr=ptr_arg; }
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virtual void move_field_offset(ptrdiff_t ptr_diff)
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inline void move_field(uchar *ptr_arg) { ptr=ptr_arg; }
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virtual void move_field_offset(my_ptrdiff_t ptr_diff)
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ptr= ADD_TO_PTR(ptr,ptr_diff, unsigned char*);
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ptr=ADD_TO_PTR(ptr,ptr_diff, uchar*);
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null_ptr= ADD_TO_PTR(null_ptr,ptr_diff,unsigned char*);
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virtual void get_image(unsigned char *buff, uint32_t length, const CHARSET_INFO * const)
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memcpy(buff,ptr,length);
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virtual void get_image(std::basic_string<unsigned char> &buff, uint32_t length, const CHARSET_INFO * const)
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buff.append(ptr,length);
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virtual void set_image(const unsigned char *buff,uint32_t length, const CHARSET_INFO * const)
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memcpy(ptr,buff,length);
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* Copy a field part into an output buffer.
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* This function makes a copy of field part of size equal to or
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* less than "length" parameter value.
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* For fields of string types (VARCHAR, TEXT) the rest of buffer
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* is padded by zero byte.
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* @param output buffer
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* @param output buffer size
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* For variable length character fields (i.e. UTF-8) the "length"
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* parameter means a number of output buffer bytes as if all field
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* characters have maximal possible size (mbmaxlen). In the other words,
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* "length" parameter is a number of characters multiplied by
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* field_charset->mbmaxlen.
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* Number of copied bytes (excluding padded zero bytes -- see above).
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virtual uint32_t get_key_image(unsigned char *buff, uint32_t length)
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get_image(buff, length, &my_charset_bin);
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virtual uint32_t get_key_image(std::basic_string<unsigned char> &buff, uint32_t length)
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get_image(buff, length, &my_charset_bin);
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virtual void set_key_image(const unsigned char *buff,uint32_t length)
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set_image(buff,length, &my_charset_bin);
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int64_t val_int_offset(uint32_t row_offset)
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int64_t tmp=val_int();
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int64_t val_int_internal(const unsigned char *new_ptr)
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unsigned char *old_ptr= ptr;
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null_ptr=ADD_TO_PTR(null_ptr,ptr_diff,uchar*);
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virtual void get_image(uchar *buff, uint length,
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CHARSET_INFO *cs __attribute__((unused)))
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{ memcpy(buff,ptr,length); }
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virtual void set_image(const uchar *buff,uint length,
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CHARSET_INFO *cs __attribute__((unused)))
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{ memcpy(ptr,buff,length); }
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Copy a field part into an output buffer.
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Field::get_key_image()
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buff [out] output buffer
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length output buffer size
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type itMBR for geometry blobs, otherwise itRAW
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This function makes a copy of field part of size equal to or
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less than "length" parameter value.
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For fields of string types (CHAR, VARCHAR, TEXT) the rest of buffer
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is padded by zero byte.
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For variable length character fields (i.e. UTF-8) the "length"
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parameter means a number of output buffer bytes as if all field
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characters have maximal possible size (mbmaxlen). In the other words,
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"length" parameter is a number of characters multiplied by
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field_charset->mbmaxlen.
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Number of copied bytes (excluding padded zero bytes -- see above).
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virtual uint get_key_image(uchar *buff, uint length,
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imagetype type __attribute__((unused)))
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get_image(buff, length, &my_charset_bin);
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virtual void set_key_image(const uchar *buff,uint length)
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{ set_image(buff,length, &my_charset_bin); }
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inline int64_t val_int_offset(uint row_offset)
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int64_t tmp=val_int();
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inline int64_t val_int(const uchar *new_ptr)
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int64_t return_value;
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ptr= const_cast<unsigned char*>(new_ptr);
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ptr= (uchar*) new_ptr;
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return_value= val_int();
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return return_value;
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String *val_str_internal(String *str, const unsigned char *new_ptr)
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inline String *val_str(String *str, const uchar *new_ptr)
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unsigned char *old_ptr= ptr;
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ptr= const_cast<unsigned char*>(new_ptr);
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val_str_internal(str);
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ptr= (uchar*) new_ptr;
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Pack the field into a format suitable for storage and transfer.
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To implement packing functionality, only the virtual function
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should be overridden. The other functions are just convenience
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functions and hence should not be overridden.
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The value of <code>low_byte_first</code> is dependent on how the
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packed data is going to be used: for local use, e.g., temporary
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store on disk or in memory, use the native format since that is
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faster. For data that is going to be transfered to other machines
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(e.g., when writing data to the binary log), data should always be
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stored in little-endian format.
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@note The default method for packing fields just copy the raw bytes
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of the record into the destination, but never more than
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<code>max_length</code> characters.
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Pointer to memory area where representation of field should be put.
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Pointer to memory area where record representation of field is
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Maximum length of the field, as given in the column definition. For
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example, for <code>CHAR(1000)</code>, the <code>max_length</code>
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is 1000. This information is sometimes needed to decide how to pack
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@param low_byte_first
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@c true if integers should be stored little-endian, @c false if
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native format should be used. Note that for little-endian machines,
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the value of this flag is a moot point since the native format is
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virtual unsigned char *pack(unsigned char *to,
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const unsigned char *from,
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bool low_byte_first);
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unsigned char *pack(unsigned char *to, const unsigned char *from);
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Unpack a field from row data.
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This method is used to unpack a field from a master whose size of
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the field is less than that of the slave.
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The <code>param_data</code> parameter is a two-byte integer (stored
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in the least significant 16 bits of the unsigned integer) usually
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consisting of two parts: the real type in the most significant byte
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and a original pack length in the least significant byte.
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The exact layout of the <code>param_data</code> field is given by
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the <code>Table_map_log_event::save_field_metadata()</code>.
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This is the default method for unpacking a field. It just copies
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the memory block in byte order (of original pack length bytes or
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length of field, whichever is smaller).
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@param to Destination of the data
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@param from Source of the data
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@param param_data Real type and original pack length of the field
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@param low_byte_first
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If this flag is @c true, all composite entities (e.g., lengths)
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should be unpacked in little-endian format; otherwise, the entities
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are unpacked in native order.
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@return New pointer into memory based on from + length of the data
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virtual const unsigned char *unpack(unsigned char* to,
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const unsigned char *from,
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bool low_byte_first);
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@overload Field::unpack(unsigned char*, const unsigned char*,
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const unsigned char *unpack(unsigned char* to,
573
const unsigned char *from);
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virtual unsigned char *pack_key(unsigned char* to,
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const unsigned char *from,
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return pack(to, from, max_length, low_byte_first);
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virtual const unsigned char *unpack_key(unsigned char* to,
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const unsigned char *from,
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virtual bool send_binary(Protocol *protocol);
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virtual uchar *pack(uchar *to, const uchar *from,
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uint max_length, bool low_byte_first);
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@overload Field::pack(uchar*, const uchar*, uint, bool)
394
uchar *pack(uchar *to, const uchar *from)
396
uchar *result= this->pack(to, from, UINT_MAX, table->s->db_low_byte_first);
400
virtual const uchar *unpack(uchar* to, const uchar *from,
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uint param_data, bool low_byte_first);
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@overload Field::unpack(uchar*, const uchar*, uint, bool)
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const uchar *unpack(uchar* to, const uchar *from)
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const uchar *result= unpack(to, from, 0U, table->s->db_low_byte_first);
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virtual uchar *pack_key(uchar* to, const uchar *from,
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uint max_length, bool low_byte_first)
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return pack(to, from, max_length, low_byte_first);
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virtual uchar *pack_key_from_key_image(uchar* to, const uchar *from,
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uint max_length, bool low_byte_first)
419
return pack(to, from, max_length, low_byte_first);
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virtual const uchar *unpack_key(uchar* to, const uchar *from,
422
uint max_length, bool low_byte_first)
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424
return unpack(to, from, max_length, low_byte_first);
589
virtual uint32_t max_packed_col_length(uint32_t max_length)
426
virtual uint packed_col_length(const uchar *to __attribute__((unused)),
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virtual uint max_packed_col_length(uint max_length)
430
{ return max_length;}
594
uint32_t offset(const unsigned char *record)
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virtual int pack_cmp(const uchar *a,const uchar *b,
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uint key_length_arg __attribute__((unused)),
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my_bool insert_or_update __attribute__((unused)))
436
virtual int pack_cmp(const uchar *b,
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uint key_length_arg __attribute__((unused)),
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my_bool insert_or_update __attribute__((unused)))
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{ return cmp(ptr,b); }
440
uint offset(uchar *record)
596
return (uint32_t) (ptr - record);
442
return (uint) (ptr - record);
598
444
void copy_from_tmp(int offset);
599
uint32_t fill_cache_field(CacheField *copy);
600
virtual bool get_date(type::Time <ime,uint32_t fuzzydate);
601
virtual bool get_time(type::Time <ime);
602
virtual const CHARSET_INFO *charset(void) const { return &my_charset_bin; }
603
virtual const CHARSET_INFO *sort_charset(void) const { return charset(); }
445
uint fill_cache_field(struct st_cache_field *copy);
446
virtual bool get_date(DRIZZLE_TIME *ltime,uint fuzzydate);
447
virtual bool get_time(DRIZZLE_TIME *ltime);
448
virtual CHARSET_INFO *charset(void) const { return &my_charset_bin; }
449
virtual CHARSET_INFO *sort_charset(void) const { return charset(); }
604
450
virtual bool has_charset(void) const { return false; }
605
virtual void set_charset(const CHARSET_INFO * const)
451
virtual void set_charset(CHARSET_INFO *charset_arg __attribute__((unused)))
607
453
virtual enum Derivation derivation(void) const
609
return DERIVATION_IMPLICIT;
611
virtual void set_derivation(enum Derivation)
614
Produce warning or note about data saved into field.
616
@param level - level of message (Note/Warning/Error)
617
@param code - error code of message to be produced
618
@param cuted_increment - whenever we should increase cut fields count or not
621
This function won't produce warning and increase cut fields counter
622
if count_cuted_fields == CHECK_FIELD_IGNORE for current thread.
624
if count_cuted_fields == CHECK_FIELD_IGNORE then we ignore notes.
625
This allows us to avoid notes in optimisation, like convert_constant_item().
628
1 if count_cuted_fields == CHECK_FIELD_IGNORE and error level is not NOTE
632
bool set_warning(DRIZZLE_ERROR::enum_warning_level,
633
drizzled::error_t code,
454
{ return DERIVATION_IMPLICIT; }
455
virtual void set_derivation(enum Derivation derivation_arg __attribute__((unused)))
457
bool set_warning(MYSQL_ERROR::enum_warning_level, unsigned int code,
634
458
int cuted_increment);
636
Produce warning or note about datetime string data saved into field.
638
@param level level of message (Note/Warning/Error)
639
@param code error code of message to be produced
640
@param str string value which we tried to save
641
@param str_length length of string which we tried to save
642
@param ts_type type of datetime value (datetime/date/time)
643
@param cuted_increment whenever we should increase cut fields count or not
646
This function will always produce some warning but won't increase cut
647
fields counter if count_cuted_fields ==FIELD_CHECK_IGNORE for current
650
void set_datetime_warning(DRIZZLE_ERROR::enum_warning_level,
651
drizzled::error_t code,
654
type::timestamp_t ts_type,
655
int cuted_increment);
657
Produce warning or note about integer datetime value saved into field.
659
@param level level of message (Note/Warning/Error)
660
@param code error code of message to be produced
661
@param nr numeric value which we tried to save
662
@param ts_type type of datetime value (datetime/date/time)
663
@param cuted_increment whenever we should increase cut fields count or not
666
This function will always produce some warning but won't increase cut
667
fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current
670
void set_datetime_warning(DRIZZLE_ERROR::enum_warning_level,
671
drizzled::error_t code,
673
type::timestamp_t ts_type,
674
int cuted_increment);
676
Produce warning or note about double datetime data saved into field.
678
@param level level of message (Note/Warning/Error)
679
@param code error code of message to be produced
680
@param nr double value which we tried to save
681
@param ts_type type of datetime value (datetime/date/time)
684
This function will always produce some warning but won't increase cut
685
fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current
688
void set_datetime_warning(DRIZZLE_ERROR::enum_warning_level,
689
const drizzled::error_t code,
691
type::timestamp_t ts_type);
692
bool check_overflow(int op_result)
459
void set_datetime_warning(MYSQL_ERROR::enum_warning_level, uint code,
460
const char *str, uint str_len,
461
timestamp_type ts_type, int cuted_increment);
462
void set_datetime_warning(MYSQL_ERROR::enum_warning_level, uint code,
463
int64_t nr, timestamp_type ts_type,
464
int cuted_increment);
465
void set_datetime_warning(MYSQL_ERROR::enum_warning_level, const uint code,
466
double nr, timestamp_type ts_type);
467
inline bool check_overflow(int op_result)
694
469
return (op_result == E_DEC_OVERFLOW);
697
Process decimal library return codes and issue warnings for overflow and
700
@param op_result decimal library return code (E_DEC_* see include/decimal.h)
703
E_DEC_OVERFLOW there was overflow
704
E_DEC_TRUNCATED there was truncation
706
0 no error or there was some other error except overflow or truncation
708
471
int warn_if_overflow(int op_result);
709
void init(Table *table_arg);
472
void init(TABLE *table_arg)
474
orig_table= table= table_arg;
475
table_name= &table_arg->alias;
711
478
/* maximum possible display length */
712
479
virtual uint32_t max_display_length()= 0;
714
virtual uint32_t is_equal(CreateField *new_field);
716
Conversion from decimal to int64_t with checking overflow and
717
setting correct value (min/max) in case of overflow.
719
@param val value which have to be converted
720
@param unsigned_flag type of integer in which we convert val
721
@param err variable to pass error code
724
value converted from val
726
int64_t convert_decimal2int64_t(const type::Decimal *val,
481
virtual uint is_equal(Create_field *new_field);
482
/* convert decimal to int64_t with overflow check */
483
int64_t convert_decimal2int64_t(const my_decimal *val, bool unsigned_flag,
729
485
/* The max. number of characters */
730
uint32_t char_length() const
486
inline uint32_t char_length() const
732
488
return field_length / charset()->mbmaxlen;
735
enum column_format_type column_format() const
491
inline enum column_format_type column_format() const
737
493
return (enum column_format_type)
738
494
((flags >> COLUMN_FORMAT_FLAGS) & COLUMN_FORMAT_MASK);
742
virtual void hash(uint32_t *nr, uint32_t *nr2);
743
friend bool reopen_table(Session *,Table *,bool);
745
friend class CopyField;
498
virtual void hash(ulong *nr, ulong *nr2);
499
friend bool reopen_table(THD *,struct st_table *,bool);
500
friend int cre_myisam(char * name, register TABLE *form, uint options,
501
uint64_t auto_increment_value);
502
friend class Copy_field;
746
503
friend class Item_avg_field;
747
504
friend class Item_std_field;
748
505
friend class Item_sum_num;
755
512
friend class Item_sum_max;
756
513
friend class Item_func_group_concat;
760
void setReadSet(bool arg= true);
761
void setWriteSet(bool arg= true);
765
void pack_num(uint64_t arg, unsigned char *destination= NULL);
766
void pack_num(uint32_t arg, unsigned char *destination= NULL);
767
uint64_t unpack_num(uint64_t &destination, const unsigned char *arg= NULL) const;
768
uint32_t unpack_num(uint32_t &destination, const unsigned char *arg= NULL) const;
771
std::ostream& operator<<(std::ostream& output, const Field &field);
773
} /* namespace drizzled */
775
/** @TODO Why is this in the middle of the file???*/
776
#include "drizzled/create_field.h"
517
Primitive for implementing last_null_byte().
523
Primitive for the implementation of the last_null_byte()
524
function. This represents the inheritance interface and can be
525
overridden by subclasses.
527
virtual size_t do_last_null_byte() const;
782
* A class for sending field information to a client.
786
* Send_field is basically a stripped-down POD class for
787
* representing basic information about a field...
530
Retrieve the field metadata for fields.
532
This default implementation returns 0 and saves 0 in the metadata_ptr
535
@param metadata_ptr First byte of field metadata
537
@returns 0 no bytes written.
539
virtual int do_save_field_metadata(uchar *metadata_ptr __attribute__((unused)))
544
class Field_num :public Field {
547
bool decimal_precision; // Purify cannot handle bit fields & only for decimal type
548
bool unsigned_flag; // Purify cannot handle bit fields
549
Field_num(uchar *ptr_arg,uint32_t len_arg, uchar *null_ptr_arg,
550
uchar null_bit_arg, utype unireg_check_arg,
551
const char *field_name_arg,
552
uint8_t dec_arg, bool zero_arg, bool unsigned_arg);
553
Item_result result_type () const { return REAL_RESULT; }
554
void add_unsigned(String &res) const;
555
friend class Create_field;
556
void make_field(Send_field *);
557
uint decimals() const { return (uint) dec; }
558
uint size_of() const { return sizeof(*this); }
559
bool eq_def(Field *field);
560
int store_decimal(const my_decimal *);
561
my_decimal *val_decimal(my_decimal *);
562
uint is_equal(Create_field *new_field);
563
int check_int(CHARSET_INFO *cs, const char *str, int length,
564
const char *int_end, int error);
565
bool get_int(CHARSET_INFO *cs, const char *from, uint len,
566
int64_t *rnd, uint64_t unsigned_max,
567
int64_t signed_min, int64_t signed_max);
570
/* base class for all string related classes */
572
class Field_str :public Field {
574
CHARSET_INFO *field_charset;
575
enum Derivation field_derivation;
577
Field_str(uchar *ptr_arg,uint32_t len_arg, uchar *null_ptr_arg,
578
uchar null_bit_arg, utype unireg_check_arg,
579
const char *field_name_arg, CHARSET_INFO *charset);
580
Item_result result_type () const { return STRING_RESULT; }
581
uint decimals() const { return NOT_FIXED_DEC; }
582
int store(double nr);
583
int store(int64_t nr, bool unsigned_val)=0;
584
int store_decimal(const my_decimal *);
585
int store(const char *to,uint length,CHARSET_INFO *cs)=0;
586
uint size_of() const { return sizeof(*this); }
587
CHARSET_INFO *charset(void) const { return field_charset; }
588
void set_charset(CHARSET_INFO *charset_arg) { field_charset= charset_arg; }
589
enum Derivation derivation(void) const { return field_derivation; }
590
virtual void set_derivation(enum Derivation derivation_arg)
591
{ field_derivation= derivation_arg; }
592
bool binary() const { return field_charset == &my_charset_bin; }
593
uint32_t max_display_length() { return field_length; }
594
friend class Create_field;
595
my_decimal *val_decimal(my_decimal *);
596
virtual bool str_needs_quotes() { return true; }
597
bool compare_str_field_flags(Create_field *new_field, uint32_t flags);
598
uint is_equal(Create_field *new_field);
602
/* base class for Field_varstring and Field_blob */
604
class Field_longstr :public Field_str
607
int report_if_important_data(const char *ptr, const char *end);
609
Field_longstr(uchar *ptr_arg, uint32_t len_arg, uchar *null_ptr_arg,
610
uchar null_bit_arg, utype unireg_check_arg,
611
const char *field_name_arg, CHARSET_INFO *charset_arg)
612
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
613
field_name_arg, charset_arg)
616
int store_decimal(const my_decimal *d);
617
uint32_t max_data_length() const;
620
/* base class for float and double and decimal (old one) */
621
class Field_real :public Field_num {
625
Field_real(uchar *ptr_arg, uint32_t len_arg, uchar *null_ptr_arg,
626
uchar null_bit_arg, utype unireg_check_arg,
627
const char *field_name_arg,
628
uint8_t dec_arg, bool zero_arg, bool unsigned_arg)
629
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
630
field_name_arg, dec_arg, zero_arg, unsigned_arg),
631
not_fixed(dec_arg >= NOT_FIXED_DEC)
633
int store_decimal(const my_decimal *);
634
my_decimal *val_decimal(my_decimal *);
635
int truncate(double *nr, double max_length);
636
uint32_t max_display_length() { return field_length; }
637
uint size_of() const { return sizeof(*this); }
638
virtual const uchar *unpack(uchar* to, const uchar *from,
639
uint param_data, bool low_byte_first);
640
virtual uchar *pack(uchar* to, const uchar *from,
641
uint max_length, bool low_byte_first);
645
class Field_tiny :public Field_num {
647
Field_tiny(uchar *ptr_arg, uint32_t len_arg, uchar *null_ptr_arg,
649
enum utype unireg_check_arg, const char *field_name_arg,
650
bool zero_arg, bool unsigned_arg)
651
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
652
unireg_check_arg, field_name_arg,
653
0, zero_arg,unsigned_arg)
655
enum Item_result result_type () const { return INT_RESULT; }
656
enum_field_types type() const { return DRIZZLE_TYPE_TINY;}
657
enum ha_base_keytype key_type() const
658
{ return unsigned_flag ? HA_KEYTYPE_BINARY : HA_KEYTYPE_INT8; }
659
int store(const char *to,uint length,CHARSET_INFO *charset);
660
int store(double nr);
661
int store(int64_t nr, bool unsigned_val);
662
int reset(void) { ptr[0]=0; return 0; }
663
double val_real(void);
664
int64_t val_int(void);
665
String *val_str(String*,String *);
666
bool send_binary(Protocol *protocol);
667
int cmp(const uchar *,const uchar *);
668
void sort_string(uchar *buff,uint length);
669
uint32_t pack_length() const { return 1; }
670
void sql_type(String &str) const;
671
uint32_t max_display_length() { return 4; }
673
virtual uchar *pack(uchar* to, const uchar *from,
674
uint max_length __attribute__((unused)),
675
bool low_byte_first __attribute__((unused)))
681
virtual const uchar *unpack(uchar* to, const uchar *from,
682
uint param_data __attribute__((unused)),
683
bool low_byte_first __attribute__((unused)))
691
class Field_enum :public Field_str {
696
Field_enum(uchar *ptr_arg, uint32_t len_arg, uchar *null_ptr_arg,
698
enum utype unireg_check_arg, const char *field_name_arg,
700
TYPELIB *typelib_arg,
701
CHARSET_INFO *charset_arg)
702
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
703
unireg_check_arg, field_name_arg, charset_arg),
704
packlength(packlength_arg),typelib(typelib_arg)
708
Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type);
709
enum_field_types type() const { return DRIZZLE_TYPE_ENUM; }
710
enum Item_result cmp_type () const { return INT_RESULT; }
711
enum Item_result cast_to_int_type () const { return INT_RESULT; }
712
enum ha_base_keytype key_type() const;
713
int store(const char *to,uint length,CHARSET_INFO *charset);
714
int store(double nr);
715
int store(int64_t nr, bool unsigned_val);
716
double val_real(void);
717
int64_t val_int(void);
718
String *val_str(String*,String *);
719
int cmp(const uchar *,const uchar *);
720
void sort_string(uchar *buff,uint length);
721
uint32_t pack_length() const { return (uint32_t) packlength; }
722
void store_type(uint64_t value);
723
void sql_type(String &str) const;
724
uint size_of() const { return sizeof(*this); }
725
enum_field_types real_type() const { return DRIZZLE_TYPE_ENUM; }
726
uint pack_length_from_metadata(uint field_metadata)
727
{ return (field_metadata & 0x00ff); }
728
uint row_pack_length() { return pack_length(); }
729
virtual bool zero_pack() const { return 0; }
730
bool optimize_range(uint idx __attribute__((unused)),
731
uint part __attribute__((unused)))
733
bool eq_def(Field *field);
734
bool has_charset(void) const { return true; }
735
/* enum and set are sorted as integers */
736
CHARSET_INFO *sort_charset(void) const { return &my_charset_bin; }
738
int do_save_field_metadata(uchar *first_byte);
742
Create field class for CREATE TABLE
745
class Create_field :public Sql_alloc
748
const char *field_name;
749
const char *change; // If done with alter table
750
const char *after; // Put column after this one
751
LEX_STRING comment; // Comment for field
752
Item *def; // Default value
753
enum enum_field_types sql_type;
755
At various stages in execution this can be length of field in bytes or
756
max number of characters.
760
The value of `length' as set by parser: is the number of characters
761
for most of the types, or of bytes for BLOBs or numeric types.
763
uint32_t char_length;
764
uint decimals, flags, pack_length, key_length;
765
Field::utype unireg_check;
766
TYPELIB *interval; // Which interval to use
767
TYPELIB *save_interval; // Temporary copy for the above
768
// Used only for UCS2 intervals
769
List<String> interval_list;
770
CHARSET_INFO *charset;
771
Field *field; // For alter table
773
uint8_t row,col,sc_length,interval_id; // For rea_create_table
774
uint offset,pack_flag;
775
Create_field() :after(0) {}
776
Create_field(Field *field, Field *orig_field);
777
/* Used to make a clone of this object for ALTER/CREATE TABLE */
778
Create_field *clone(MEM_ROOT *mem_root) const
779
{ return new (mem_root) Create_field(*this); }
780
void create_length_to_internal_length(void);
782
inline enum column_format_type column_format() const
784
return (enum column_format_type)
785
((flags >> COLUMN_FORMAT_FLAGS) & COLUMN_FORMAT_MASK);
788
/* Init for a tmp table field. To be extended if need be. */
789
void init_for_tmp_table(enum_field_types sql_type_arg,
790
uint32_t max_length, uint32_t decimals,
791
bool maybe_null, bool is_unsigned);
793
bool init(THD *thd, char *field_name, enum_field_types type, char *length,
794
char *decimals, uint type_modifier, Item *default_value,
795
Item *on_update_value, LEX_STRING *comment, char *change,
796
List<String> *interval_list, CHARSET_INFO *cs,
798
enum column_format_type column_format);
803
A class for sending info to the client
792
808
const char *db_name;
793
const char *table_name;
794
const char *org_table_name;
795
const char *col_name;
796
const char *org_col_name;
809
const char *table_name,*org_table_name;
810
const char *col_name,*org_col_name;
812
uint charsetnr, flags, decimals;
801
813
enum_field_types type;
805
uint32_t pack_length_to_packflag(uint32_t type);
819
A class for quick copying data to fields
822
class Copy_field :public Sql_alloc {
824
Convenience definition of a copy function returned by
827
typedef void Copy_func(Copy_field*);
828
Copy_func *get_copy_func(Field *to, Field *from);
830
uchar *from_ptr,*to_ptr;
831
uchar *from_null_ptr,*to_null_ptr;
833
uint from_bit,to_bit;
834
uint from_length,to_length;
835
Field *from_field,*to_field;
836
String tmp; // For items
840
void set(Field *to,Field *from,bool save); // Field to field
841
void set(uchar *to,Field *from); // Field to string
842
void (*do_copy)(Copy_field *);
843
void (*do_copy2)(Copy_field *); // Used to handle null values
847
Field *make_field(TABLE_SHARE *share, uchar *ptr, uint32_t field_length,
848
uchar *null_pos, uchar null_bit,
849
uint pack_flag, enum_field_types field_type,
851
Field::utype unireg_check,
852
TYPELIB *interval, const char *field_name);
853
uint pack_length_to_packflag(uint type);
854
enum_field_types get_blob_type_from_length(ulong length);
806
855
uint32_t calc_pack_length(enum_field_types type,uint32_t length);
807
856
int set_field_to_null(Field *field);
808
857
int set_field_to_null_with_conversions(Field *field, bool no_conversions);
811
* Tests if the given string contains important data:
812
* not spaces for character string, or any data for binary string.
814
* @param pointer to the character set to use
815
* @param String to test
819
* false - If string does not have important data
821
* true - If string has some important data
860
check_string_copy_error(Field_str *field,
861
const char *well_formed_error_pos,
862
const char *cannot_convert_error_pos,
823
bool test_if_important_data(const CHARSET_INFO * const cs,
827
} /* namespace drizzled */
829
#endif /* DRIZZLED_FIELD_H */
869
#include <drizzled/field/blob.h>
870
#include <drizzled/field/null.h>
871
#include <drizzled/field/date.h>
872
#include <drizzled/field/fdecimal.h>
873
#include <drizzled/field/double.h>
874
#include <drizzled/field/short.h>
875
#include <drizzled/field/long.h>
876
#include <drizzled/field/int64_t.h>
877
#include <drizzled/field/timetype.h>
878
#include <drizzled/field/timestamp.h>
879
#include <drizzled/field/datetime.h>
880
#include <drizzled/field/fstring.h>
881
#include <drizzled/field/varstring.h>
882
#include <drizzled/field/set.h>
885
The following are for the interface with the .frm file
888
#define FIELDFLAG_DECIMAL 1
889
#define FIELDFLAG_BINARY 1 // Shares same flag
890
#define FIELDFLAG_NUMBER 2
891
#define FIELDFLAG_DECIMAL_POSITION 4
892
#define FIELDFLAG_PACK 120 // Bits used for packing
893
#define FIELDFLAG_INTERVAL 256 // mangled with decimals!
894
#define FIELDFLAG_BITFIELD 512 // mangled with decimals!
895
#define FIELDFLAG_BLOB 1024 // mangled with decimals!
896
#define FIELDFLAG_GEOM 2048 // mangled with decimals!
898
#define FIELDFLAG_TREAT_BIT_AS_CHAR 4096 /* use Field_bit_as_char */
900
#define FIELDFLAG_LEFT_FULLSCREEN 8192
901
#define FIELDFLAG_RIGHT_FULLSCREEN 16384
902
#define FIELDFLAG_FORMAT_NUMBER 16384 // predit: ###,,## in output
903
#define FIELDFLAG_NO_DEFAULT 16384 /* sql */
904
#define FIELDFLAG_SUM ((uint) 32768)// predit: +#fieldflag
905
#define FIELDFLAG_MAYBE_NULL ((uint) 32768)// sql
906
#define FIELDFLAG_HEX_ESCAPE ((uint) 0x10000)
907
#define FIELDFLAG_PACK_SHIFT 3
908
#define FIELDFLAG_DEC_SHIFT 8
909
#define FIELDFLAG_MAX_DEC 31
910
#define FIELDFLAG_NUM_SCREEN_TYPE 0x7F01
911
#define FIELDFLAG_ALFA_SCREEN_TYPE 0x7800
913
#define MTYP_TYPENR(type) (type & 127) /* Remove bits from type */
915
#define f_is_dec(x) ((x) & FIELDFLAG_DECIMAL)
916
#define f_is_num(x) ((x) & FIELDFLAG_NUMBER)
917
#define f_is_decimal_precision(x) ((x) & FIELDFLAG_DECIMAL_POSITION)
918
#define f_is_packed(x) ((x) & FIELDFLAG_PACK)
919
#define f_packtype(x) (((x) >> FIELDFLAG_PACK_SHIFT) & 15)
920
#define f_decimals(x) ((uint8_t) (((x) >> FIELDFLAG_DEC_SHIFT) & FIELDFLAG_MAX_DEC))
921
#define f_is_alpha(x) (!f_is_num(x))
922
#define f_is_binary(x) ((x) & FIELDFLAG_BINARY) // 4.0- compatibility
923
#define f_is_enum(x) (((x) & (FIELDFLAG_INTERVAL | FIELDFLAG_NUMBER)) == FIELDFLAG_INTERVAL)
924
#define f_is_bitfield(x) (((x) & (FIELDFLAG_BITFIELD | FIELDFLAG_NUMBER)) == FIELDFLAG_BITFIELD)
925
#define f_is_blob(x) (((x) & (FIELDFLAG_BLOB | FIELDFLAG_NUMBER)) == FIELDFLAG_BLOB)
926
#define f_is_equ(x) ((x) & (1+2+FIELDFLAG_PACK+31*256))
927
#define f_settype(x) (((int) x) << FIELDFLAG_PACK_SHIFT)
928
#define f_maybe_null(x) (x & FIELDFLAG_MAYBE_NULL)
929
#define f_no_default(x) (x & FIELDFLAG_NO_DEFAULT)
930
#define f_bit_as_char(x) ((x) & FIELDFLAG_TREAT_BIT_AS_CHAR)
931
#define f_is_hex_escape(x) ((x) & FIELDFLAG_HEX_ESCAPE)