~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Copyright (C) 2008 Sun Microsystems
 *
 *  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
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include CSTDINT_H

/**
 * @file
 *
 * Mostly constants and some macros/functions used by the server  
 */

#ifndef DRIZZLE_SERVER_DEFINITIONS_H
#define DRIZZLE_SERVER_DEFINITIONS_H

#ifndef NO_ALARM_LOOP
#define NO_ALARM_LOOP		/* lib5 and popen can't use alarm */
#endif

/* These paths are converted to other systems (WIN95) before use */

#define LANGUAGE	"english/"
#define ERRMSG_FILE	"errmsg.sys"
#define TEMP_PREFIX	"MY"
#define LOG_PREFIX	"ML"
#define PROGDIR		"bin/"
#ifndef DATADIR
#define DATADIR		"data/"
#endif
#ifndef SHAREDIR
#define SHAREDIR	"share/"
#endif
#ifndef PLUGINDIR
#define PLUGINDIR	"lib/plugin"
#endif

#define ER(X) error_message((X))

#define LIBLEN FN_REFLEN-FN_LEN			/* Max l{ngd p} dev */
/* extra 4+4 bytes for slave tmp tables */
#define MAX_DBKEY_LENGTH (NAME_LEN*2+1+1+4+4)
#define MAX_ALIAS_NAME 256
#define MAX_FIELD_NAME 34			/* Max colum name length +2 */
#define MAX_SYS_VAR_LENGTH 32
#define MAX_KEY MAX_INDEXES                     /* Max used keys */
#define MAX_REF_PARTS 16			/* Max parts used as ref */
#define MAX_KEY_LENGTH 4096			/* max possible key */
#define MAX_KEY_LENGTH_DECIMAL_WIDTH 4          /* strlen("4096") */
#if SIZEOF_OFF_T > 4
#define MAX_REFLENGTH 8				/* Max length for record ref */
#else
#define MAX_REFLENGTH 4				/* Max length for record ref */
#endif
#define MAX_HOSTNAME  61			/* len+1 in mysql.user */

#define MAX_MBWIDTH		4		/* Max multibyte sequence */
#define MAX_FIELD_CHARLENGTH	255
#define MAX_FIELD_VARCHARLENGTH	65535
#define CONVERT_IF_BIGGER_TO_BLOB 512		/* Used for CREATE ... SELECT */

/* Max column width +1 */
#define MAX_FIELD_WIDTH		(MAX_FIELD_CHARLENGTH*MAX_MBWIDTH+1)

#define MAX_BIT_FIELD_LENGTH    64      /* Max length in bits for bit fields */

#define MAX_DATE_WIDTH		10	/* YYYY-MM-DD */
#define MAX_TIME_WIDTH		23	/* -DDDDDD HH:MM:SS.###### */
#define MAX_DATETIME_FULL_WIDTH 29	/* YYYY-MM-DD HH:MM:SS.###### AM */
#define MAX_DATETIME_WIDTH	19	/* YYYY-MM-DD HH:MM:SS */
#define MAX_DATETIME_COMPRESSED_WIDTH 14  /* YYYYMMDDHHMMSS */

#define MAX_TABLES	(sizeof(table_map)*8-3)	/* Max tables in join */
#define PARAM_TABLE_BIT	(((table_map) 1) << (sizeof(table_map)*8-3))
#define OUTER_REF_TABLE_BIT	(((table_map) 1) << (sizeof(table_map)*8-2))
#define RAND_TABLE_BIT	(((table_map) 1) << (sizeof(table_map)*8-1))
#define PSEUDO_TABLE_BITS (PARAM_TABLE_BIT | OUTER_REF_TABLE_BIT | \
                           RAND_TABLE_BIT)
#define MAX_FIELDS	4096			/* Limit in the .frm file */

#define MAX_SELECT_NESTING (sizeof(nesting_map)*8-1)

#define MAX_SORT_MEMORY (2048*1024-MALLOC_OVERHEAD)
#define MIN_SORT_MEMORY (32*1024-MALLOC_OVERHEAD)

/* Memory allocated when parsing a statement / saving a statement */
#define MEM_ROOT_BLOCK_SIZE       8192
#define MEM_ROOT_PREALLOC         8192
#define TRANS_MEM_ROOT_BLOCK_SIZE 4096
#define TRANS_MEM_ROOT_PREALLOC   4096

#define DEFAULT_ERROR_COUNT	64
#define EXTRA_RECORDS	10			/* Extra records in sort */
#define SCROLL_EXTRA	5			/* Extra scroll-rows. */
#define FIELD_NAME_USED ((uint) 32768)		/* Bit set if fieldname used */
#define FORM_NAME_USED	((uint) 16384)		/* Bit set if formname used */
#define FIELD_NR_MASK	16383			/* To get fieldnumber */
#define FERR		-1			/* Error from my_functions */
#define CREATE_MODE	0			/* Default mode on new files */
#define NAMES_SEP_CHAR	'\377'			/* Char to sep. names */

#define READ_RECORD_BUFFER	(uint) (IO_SIZE*8) /* Pointer_buffer_size */
#define DISK_BUFFER_SIZE	(uint) (IO_SIZE*16) /* Size of diskbuffer */

#define ME_INFO (ME_HOLDTANG+ME_OLDWIN+ME_NOREFRESH)
#define ME_ERROR (ME_BELL+ME_OLDWIN+ME_NOREFRESH)
#define MYF_RW MYF(MY_WME+MY_NABP)		/* Vid my_read & my_write */

	/* Extern defines */
#define store_record(A,B) memcpy((A)->B,(A)->record[0],(size_t) (A)->s->reclength)
#define restore_record(A,B) memcpy((A)->record[0],(A)->B,(size_t) (A)->s->reclength)
#define cmp_record(A,B) memcmp((A)->record[0],(A)->B,(size_t) (A)->s->reclength)
#define empty_record(A)                                 \
  do {                                                  \
    restore_record((A),s->default_values);              \
    memset((A)->null_flags, 255, (A)->s->null_bytes);   \
  } while (0)

	/* Defines for use with openfrm, openprt and openfrd */

#define READ_ALL		1	/* openfrm: Read all parameters */
#define CHANGE_FRM		2	/* openfrm: open .frm as O_RDWR */
#define EXTRA_RECORD		8	/* Reservera plats f|r extra record */
#define DONT_GIVE_ERROR		256	/* Don't do frm_error on openfrm  */
#define DELAYED_OPEN		4096	/* Open table later */
/**
  This flag is used in function get_all_tables() which fills
  I_S tables with data which are retrieved from frm files and storage engine
  The flag means that we need to open FRM file only to get necessary data.
*/
#define OPEN_FRM_FILE_ONLY     32768
/**
  This flag is used in function get_all_tables() which fills
  I_S tables with data which are retrieved from frm files and storage engine
  The flag means that we need to process tables only to get necessary data.
  Views are not processed.
*/
#define OPEN_TABLE_ONLY        OPEN_FRM_FILE_ONLY*2
/**
  This flag is used in function get_all_tables() which fills
  I_S tables with data which are retrieved from frm files and storage engine.
  The flag means that I_S table uses optimization algorithm.
*/
#define OPTIMIZE_I_S_TABLE     OPEN_TABLE_ONLY*2

#define SC_INFO_LENGTH 4		/* Form format constant */
#define TE_INFO_LENGTH 3
#define MTYP_NOEMPTY_BIT 128

#define FRM_VER_TRUE_VARCHAR (FRM_VER+4) /* 10 */
#define DRIZZLE_VERSION_TABLESPACE_IN_FRM_CGE 50120
#define DRIZZLE_VERSION_TABLESPACE_IN_FRM 50205
#define DRIZZLE_VERSION_TABLESPACE_IN_FRM_STR "50205"

/*
  Minimum length pattern before Turbo Boyer-Moore is used
  for SELECT "text" LIKE "%pattern%", excluding the two
  wildcards in class Item_func_like.
*/
#define MIN_TURBOBM_PATTERN_LEN 3

/* 
   Defines for binary logging.
   Do not decrease the value of BIN_LOG_HEADER_SIZE.
   Do not even increase it before checking code.
*/

#define BIN_LOG_HEADER_SIZE    4 

#define DEFAULT_KEY_CACHE_NAME "default"

#define STORAGE_TYPE_MASK 7
#define COLUMN_FORMAT_MASK 7
#define COLUMN_FORMAT_SHIFT 3

/* Below are #defines that used to be in mysql_priv.h */
/***************************************************************************
  Configuration parameters
****************************************************************************/
#define ACL_CACHE_SIZE		256
#define MAX_PASSWORD_LENGTH	32
#define HOST_CACHE_SIZE		128
#define MAX_ACCEPT_RETRY	10	// Test accept this many times
#define MAX_FIELDS_BEFORE_HASH	32
#define USER_VARS_HASH_SIZE     16
#define TABLE_OPEN_CACHE_MIN    64
#define TABLE_OPEN_CACHE_DEFAULT 64

/* 
 Value of 9236 discovered through binary search 2006-09-26 on Ubuntu Dapper
 Drake, libc6 2.3.6-0ubuntu2, Linux kernel 2.6.15-27-686, on x86.  (Added 
 100 bytes as reasonable buffer against growth and other environments'
 requirements.)

 Feel free to raise this by the smallest amount you can to get the
 "execution_constants" test to pass.
 */
#define STACK_MIN_SIZE          12000   ///< Abort if less stack during eval.

#define STACK_MIN_SIZE_FOR_OPEN 1024*80
#define STACK_BUFF_ALLOC        352     ///< For stack overrun checks

/** 
 * @TODO Move into a drizzled.h since it's only used in drizzled.cc
 *
 * @TODO Rename to DRIZZLED_NET_RETRY_COUNT
 */
#ifndef MYSQLD_NET_RETRY_COUNT
#define MYSQLD_NET_RETRY_COUNT  10	///< Abort read after this many int.
#endif
#define TEMP_POOL_SIZE          128

#define QUERY_ALLOC_BLOCK_SIZE		8192
#define QUERY_ALLOC_PREALLOC_SIZE   	8192
#define TRANS_ALLOC_BLOCK_SIZE		4096
#define TRANS_ALLOC_PREALLOC_SIZE	4096
#define RANGE_ALLOC_BLOCK_SIZE		4096
#define ACL_ALLOC_BLOCK_SIZE		1024
#define UDF_ALLOC_BLOCK_SIZE		1024
#define TABLE_ALLOC_BLOCK_SIZE		1024
#define BDB_LOG_ALLOC_BLOCK_SIZE	1024
#define WARN_ALLOC_BLOCK_SIZE		2048
#define WARN_ALLOC_PREALLOC_SIZE	1024
#define PROFILE_ALLOC_BLOCK_SIZE  2048
#define PROFILE_ALLOC_PREALLOC_SIZE 1024

/*
  The following parameters is to decide when to use an extra cache to
  optimise seeks when reading a big table in sorted order
*/
#define MIN_FILE_LENGTH_TO_USE_ROW_CACHE (10L*1024*1024)
#define MIN_ROWS_TO_USE_TABLE_CACHE	 100
#define MIN_ROWS_TO_USE_BULK_INSERT	 100

/**
  The following is used to decide if MySQL should use table scanning
  instead of reading with keys.  The number says how many evaluation of the
  WHERE clause is comparable to reading one extra row from a table.
*/
#define TIME_FOR_COMPARE   5	// 5 compares == one read

/**
  Number of comparisons of table rowids equivalent to reading one row from a 
  table.
*/
#define TIME_FOR_COMPARE_ROWID  (TIME_FOR_COMPARE*2)

/*
  For sequential disk seeks the cost formula is:
    DISK_SEEK_BASE_COST + DISK_SEEK_PROP_COST * #blocks_to_skip  
  
  The cost of average seek 
    DISK_SEEK_BASE_COST + DISK_SEEK_PROP_COST*BLOCKS_IN_AVG_SEEK =1.0.
*/
#define DISK_SEEK_BASE_COST ((double)0.9)

#define BLOCKS_IN_AVG_SEEK  128

#define DISK_SEEK_PROP_COST ((double)0.1/BLOCKS_IN_AVG_SEEK)


/**
  Number of rows in a reference table when refereed through a not unique key.
  This value is only used when we don't know anything about the key
  distribution.
*/
#define MATCHING_ROWS_IN_OTHER_TABLE 10

/** Don't pack string keys shorter than this (if PACK_KEYS=1 isn't used). */
#define KEY_DEFAULT_PACK_LENGTH 8

/** Characters shown for the command in 'show processlist'. */
#define PROCESS_LIST_WIDTH 100
/* Characters shown for the command in 'information_schema.processlist' */
#define PROCESS_LIST_INFO_WIDTH 65535

#define PRECISION_FOR_DOUBLE 53
#define PRECISION_FOR_FLOAT  24

/*
  Default time to wait before aborting a new client connection
  that does not respond to "initial server greeting" timely
*/
#define CONNECT_TIMEOUT		10

/* The following can also be changed from the command line */
#define DEFAULT_CONCURRENCY	10
#define FLUSH_TIME		0		/**< Don't flush tables */
#define MAX_CONNECT_ERRORS	10		///< errors before disabling host

#define INTERRUPT_PRIOR 10
#define CONNECT_PRIOR	9
#define WAIT_PRIOR	8
#define QUERY_PRIOR	6

	/* Bits from testflag */
#define TEST_PRINT_CACHED_TABLES 1
#define TEST_NO_KEY_GROUP	 2
#define TEST_MIT_THREAD		4
#define TEST_KEEP_TMP_TABLES	16
#define TEST_READCHECK		64	/**< Force use of readcheck */
#define TEST_NO_EXTRA		128
#define TEST_CORE_ON_SIGNAL	256	/**< Give core if signal */
#define TEST_NO_STACKTRACE	512
#define TEST_SIGINT		1024	/**< Allow sigint on threads */
#define TEST_SYNCHRONIZATION    2048    /**< get server to do sleep in some places */

/* Bits for different SQL modes modes (including ANSI mode) */
#define MODE_NO_ZERO_DATE		(2)
#define MODE_INVALID_DATES		(MODE_NO_ZERO_DATE*2)

/* @@optimizer_switch flags */
#define OPTIMIZER_SWITCH_NO_MATERIALIZATION 1
#define OPTIMIZER_SWITCH_NO_SEMIJOIN 2

#define MY_CHARSET_BIN_MB_MAXLEN 1

// uncachable cause
#define UNCACHEABLE_DEPENDENT   1
#define UNCACHEABLE_RAND        2
#define UNCACHEABLE_SIDEEFFECT	4
/// forcing to save JOIN for explain
#define UNCACHEABLE_EXPLAIN     8
/** Don't evaluate subqueries in prepare even if they're not correlated */
#define UNCACHEABLE_PREPARE    16
/* For uncorrelated SELECT in an UNION with some correlated SELECTs */
#define UNCACHEABLE_UNITED     32

/* Used to check GROUP BY list in the MODE_ONLY_FULL_GROUP_BY mode */
#define UNDEF_POS (-1)

/* BINLOG_DUMP options */

#define BINLOG_DUMP_NON_BLOCK   1

/* sql_show.cc:show_log_files() */
#define SHOW_LOG_STATUS_FREE "FREE"
#define SHOW_LOG_STATUS_INUSE "IN USE"

/* Options to add_table_to_list() */
#define TL_OPTION_UPDATING	1
#define TL_OPTION_FORCE_INDEX	2
#define TL_OPTION_IGNORE_LEAVES 4
#define TL_OPTION_ALIAS         8

/* Some portable defines */

#define portable_sizeof_char_ptr 8

#define tmp_file_prefix "#sql"			/**< Prefix for tmp tables */
#define tmp_file_prefix_length 4

/* Flags for calc_week() function.  */
#define WEEK_MONDAY_FIRST    1
#define WEEK_YEAR            2
#define WEEK_FIRST_WEEKDAY   4

#define STRING_BUFFER_USUAL_SIZE 80

/*
  Some defines for exit codes for ::is_equal class functions.
*/
#define IS_EQUAL_NO 0
#define IS_EQUAL_YES 1
#define IS_EQUAL_PACK_LENGTH 2


/**
  Query type constants.

  QT_ORDINARY -- ordinary SQL query.
  QT_IS -- SQL query to be shown in INFORMATION_SCHEMA (in utf8 and without
  character set introducers).

  @TODO

  Move this out of here once Stew's done with UDF breakout.  The following headers need it:

    sql_lex.h --> included by sql_class.h
    item.h
    table.h
    item_func.h
    item_subselect.h
    item_timefunc.h
    item_sum.h
    item_cmpfunc.h
    item_strfunc.h
*/
enum enum_query_type
{
  QT_ORDINARY,
  QT_IS
};


/**
 * @TODO Move to a separate header?
 *
 * It's needed by item.h and field.h, which are both inter-dependent
 * and contain forward declarations of many structs/classes in the
 * other header file.
 *
 * What is needed is a separate header file that is included
 * by *both* item.h and field.h to resolve inter-dependencies
 *
 * But, probably want to hold off on this until Stew finished the UDF cleanup
 */
enum Derivation
{
  DERIVATION_IGNORABLE= 5,
  DERIVATION_COERCIBLE= 4,
  DERIVATION_SYSCONST= 3,
  DERIVATION_IMPLICIT= 2,
  DERIVATION_NONE= 1,
  DERIVATION_EXPLICIT= 0
};

/**
 * Opening modes for open_temporary_table and open_table_from_share
 *
 * @TODO Put this into an appropriate header. It is only needed in:
 *
 *    table.cc
 *    sql_base.cc
 */
enum open_table_mode
{
  OTM_OPEN= 0,
  OTM_CREATE= 1,
  OTM_ALTER= 2
};

enum enum_parsing_place
{
  NO_MATTER
  , IN_HAVING
  , SELECT_LIST
  , IN_WHERE
  , IN_ON
};

enum enum_mysql_completiontype {
  ROLLBACK_RELEASE= -2
  , ROLLBACK= 1
  , ROLLBACK_AND_CHAIN= 7
  , COMMIT_RELEASE= -1
  , COMMIT= 0
  , COMMIT_AND_CHAIN= 6
};

enum enum_check_fields
{
  CHECK_FIELD_IGNORE
  , CHECK_FIELD_WARN
  , CHECK_FIELD_ERROR_FOR_NULL
};

enum enum_var_type
{
  OPT_DEFAULT= 0
  , OPT_SESSION
  , OPT_GLOBAL
};


typedef uint64_t query_id_t;

/**
   The maximum is defined as (ULONG_MAX/1000) with 4 bytes uint32_t
*/
const uint32_t SLAVE_MAX_HEARTBEAT_PERIOD= 4294967;

#define SLAVE_NET_TIMEOUT  3600

#define MAX_SLAVE_ERROR    2000

/* masks for start/stop operations on io and sql slave threads */
#define SLAVE_IO  1
#define SLAVE_SQL 2

#ifndef NO_HASH
#define NO_HASH				/* Not yet implemented */
#endif

// the following is for checking tables

#define HA_ADMIN_ALREADY_DONE	  1
#define HA_ADMIN_OK               0
#define HA_ADMIN_NOT_IMPLEMENTED -1
#define HA_ADMIN_FAILED		 -2
#define HA_ADMIN_CORRUPT         -3
#define HA_ADMIN_INTERNAL_ERROR  -4
#define HA_ADMIN_INVALID         -5
#define HA_ADMIN_REJECT          -6
#define HA_ADMIN_TRY_ALTER       -7
#define HA_ADMIN_WRONG_CHECKSUM  -8
#define HA_ADMIN_NOT_BASE_TABLE  -9
#define HA_ADMIN_NEEDS_UPGRADE  -10
#define HA_ADMIN_NEEDS_ALTER    -11
#define HA_ADMIN_NEEDS_CHECK    -12


#define HA_ADD_INDEX                  (0)
#define HA_DROP_INDEX                 (1)
#define HA_ALTER_INDEX                (2)
#define HA_RENAME_INDEX               (3)
#define HA_ADD_UNIQUE_INDEX           (4)
#define HA_DROP_UNIQUE_INDEX          (5)
#define HA_ALTER_UNIQUE_INDEX         (6)
#define HA_RENAME_UNIQUE_INDEX        (7)
#define HA_ADD_PK_INDEX               (8)
#define HA_DROP_PK_INDEX              (9)
#define HA_ALTER_PK_INDEX             (10)
#define HA_ADD_COLUMN                 (11)
#define HA_DROP_COLUMN                (12)
#define HA_CHANGE_COLUMN              (13)
#define HA_ALTER_COLUMN_NAME          (14)
#define HA_ALTER_COLUMN_TYPE          (15)
#define HA_ALTER_COLUMN_ORDER         (16)
#define HA_ALTER_COLUMN_NULLABLE      (17)
#define HA_COLUMN_DEFAULT_VALUE       (18)
#define HA_COLUMN_STORAGE             (19)
#define HA_COLUMN_FORMAT              (20)
#define HA_ADD_FOREIGN_KEY            (21)
#define HA_DROP_FOREIGN_KEY           (22)
#define HA_ALTER_FOREIGN_KEY          (23)
#define HA_ADD_CONSTRAINT             (24)
#define HA_CHANGE_CHARACTER_SET       (30)
#define HA_SET_DEFAULT_CHARACTER_SET  (31)
#define HA_CHANGE_AUTOINCREMENT_VALUE (32)
#define HA_ALTER_STORAGE              (33)
#define HA_ALTER_TABLESPACE           (34)
#define HA_ALTER_ROW_FORMAT           (35)
#define HA_RENAME_TABLE               (36)
#define HA_ALTER_STORAGE_ENGINE       (37)
#define HA_RECREATE                   (38)
#define HA_ALTER_STORED_VCOL          (39)
/* Remember to increase HA_MAX_ALTER_FLAGS when adding more flags! */

/* Return values for check_if_supported_alter */

#define HA_ALTER_ERROR               -1
#define HA_ALTER_SUPPORTED_WAIT_LOCK  0
#define HA_ALTER_SUPPORTED_NO_LOCK    1
#define HA_ALTER_NOT_SUPPORTED        2

/* Bits in table_flags() to show what database can do */

#define HA_NO_TRANSACTIONS     (1 << 0) /* Doesn't support transactions */
#define HA_PARTIAL_COLUMN_READ (1 << 1) /* read may not return all columns */
#define HA_TABLE_SCAN_ON_INDEX (1 << 2) /* No separate data/index file */
/*
  The following should be set if the following is not true when scanning
  a table with rnd_next()
  - We will see all rows (including deleted ones)
  - Row positions are 'table->s->db_record_offset' apart
  If this flag is not set, filesort will do a postion() call for each matched
  row to be able to find the row later.
*/
#define HA_REC_NOT_IN_SEQ      (1 << 3)

/*
  Reading keys in random order is as fast as reading keys in sort order
  (Used in records.cc to decide if we should use a record cache and by
  filesort to decide if we should sort key + data or key + pointer-to-row
*/
#define HA_FAST_KEY_READ       (1 << 5)
/*
  Set the following flag if we on delete should force all key to be read
  and on update read all keys that changes
*/
#define HA_REQUIRES_KEY_COLUMNS_FOR_DELETE (1 << 6)
#define HA_NULL_IN_KEY         (1 << 7) /* One can have keys with NULL */
#define HA_DUPLICATE_POS       (1 << 8)    /* ha_position() gives dup row */
#define HA_NO_BLOBS            (1 << 9) /* Doesn't support blobs */
#define HA_CAN_INDEX_BLOBS     (1 << 10)
#define HA_AUTO_PART_KEY       (1 << 11) /* auto-increment in multi-part key */
#define HA_REQUIRE_PRIMARY_KEY (1 << 12) /* .. and can't create a hidden one */
#define HA_STATS_RECORDS_IS_EXACT (1 << 13) /* stats.records is exact */
/*
  If we get the primary key columns for free when we do an index read
  It also implies that we have to retrive the primary key when using
  position() and rnd_pos().
*/
#define HA_PRIMARY_KEY_IN_READ_INDEX (1 << 15)
/*
  If HA_PRIMARY_KEY_REQUIRED_FOR_POSITION is set, it means that to position()
  uses a primary key. Without primary key, we can't call position().
*/ 
#define HA_PRIMARY_KEY_REQUIRED_FOR_POSITION (1 << 16) 
#define HA_NOT_DELETE_WITH_CACHE (1 << 18)
/*
  The following is we need to a primary key to delete (and update) a row.
  If there is no primary key, all columns needs to be read on update and delete
*/
#define HA_PRIMARY_KEY_REQUIRED_FOR_DELETE (1 << 19)
#define HA_NO_PREFIX_CHAR_KEYS (1 << 20)
#define HA_NO_AUTO_INCREMENT   (1 << 23)
#define HA_HAS_CHECKSUM        (1 << 24)
/* Table data are stored in separate files (for lower_case_table_names) */
#define HA_FILE_BASED	       (1 << 26)
#define HA_NEED_READ_RANGE_BUFFER (1 << 29) /* for read_multi_range */
#define HA_ANY_INDEX_MAY_BE_UNIQUE (1 << 30)
#define HA_NO_COPY_ON_ALTER    (INT64_C(1) << 31)
#define HA_HAS_RECORDS	       (INT64_C(1) << 32) /* records() gives exact count*/
#define HA_MRR_CANT_SORT       (INT64_C(1) << 34)

/*
  Engine is capable of row-format and statement-format logging,
  respectively
*/
#define HA_BINLOG_ROW_CAPABLE  (INT64_C(1) << 35)
#define HA_BINLOG_STMT_CAPABLE (INT64_C(1) << 36)

#define HA_ONLINE_ALTER        (INT64_C(1) << 37)

/*
  Set of all binlog flags. Currently only contain the capabilities
  flags.
 */
#define HA_BINLOG_FLAGS (HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE)

/* bits in index_flags(index_number) for what you can do with index */
#define HA_READ_NEXT            1       /* TODO really use this flag */
#define HA_READ_PREV            2       /* supports ::index_prev */
#define HA_READ_ORDER           4       /* index_next/prev follow sort order */
#define HA_READ_RANGE           8       /* can find all records in a range */
#define HA_ONLY_WHOLE_INDEX	16	/* Can't use part key searches */
#define HA_KEYREAD_ONLY         64	/* Support HA_EXTRA_KEYREAD */
/*
  Index scan will not return records in rowid order. Not guaranteed to be
  set for unordered (e.g. HASH) indexes.
*/
#define HA_KEY_SCAN_NOT_ROR     128 
#define HA_DO_INDEX_COND_PUSHDOWN  256 /* Supports Index Condition Pushdown */



/*
  HA_PARTITION_FUNCTION_SUPPORTED indicates that the function is
  supported at all.
  HA_FAST_CHANGE_PARTITION means that optimised variants of the changes
  exists but they are not necessarily done online.

  HA_ONLINE_DOUBLE_WRITE means that the handler supports writing to both
  the new partition and to the old partitions when updating through the
  old partitioning schema while performing a change of the partitioning.
  This means that we can support updating of the table while performing
  the copy phase of the change. For no lock at all also a double write
  from new to old must exist and this is not required when this flag is
  set.
  This is actually removed even before it was introduced the first time.
  The new idea is that handlers will handle the lock level already in
  store_lock for ALTER Table partitions.

  HA_PARTITION_ONE_PHASE is a flag that can be set by handlers that take
  care of changing the partitions online and in one phase. Thus all phases
  needed to handle the change are implemented inside the storage engine.
  The storage engine must also support auto-discovery since the frm file
  is changed as part of the change and this change must be controlled by
  the storage engine. A typical engine to support this is NDB (through
  WL #2498).
*/
#define HA_PARTITION_FUNCTION_SUPPORTED         (1L << 1)
#define HA_FAST_CHANGE_PARTITION                (1L << 2)
#define HA_PARTITION_ONE_PHASE                  (1L << 3)

/* operations for disable/enable indexes */
#define HA_KEY_SWITCH_NONUNIQ      0
#define HA_KEY_SWITCH_ALL          1
#define HA_KEY_SWITCH_NONUNIQ_SAVE 2
#define HA_KEY_SWITCH_ALL_SAVE     3

/*
  Note: the following includes binlog and closing 0.
  so: innodb + bdb + ndb + binlog + myisam + myisammrg + archive +
      example + csv + heap + blackhole + federated + 0
  (yes, the sum is deliberately inaccurate)
  TODO remove the limit, use dynarrays
*/
#define MAX_HA 15

/*
  Parameters for open() (in register form->filestat)
  HA_GET_INFO does an implicit HA_ABORT_IF_LOCKED
*/

#define HA_OPEN_KEYFILE		1
#define HA_OPEN_RNDFILE		2
#define HA_GET_INDEX		4
#define HA_GET_INFO		8	/* do a ha_info() after open */
#define HA_READ_ONLY		16	/* File opened as readonly */
/* Try readonly if can't open with read and write */
#define HA_TRY_READ_ONLY	32
#define HA_WAIT_IF_LOCKED	64	/* Wait if locked on open */
#define HA_ABORT_IF_LOCKED	128	/* skip if locked on open.*/
#define HA_BLOCK_LOCK		256	/* unlock when reading some records */
#define HA_OPEN_TEMPORARY	512

/* For transactional LOCK Table. handler::lock_table() */
#define HA_LOCK_IN_SHARE_MODE      F_RDLCK
#define HA_LOCK_IN_EXCLUSIVE_MODE  F_WRLCK

/* Some key definitions */
#define HA_KEY_NULL_LENGTH	1
#define HA_KEY_BLOB_LENGTH	2

#define HA_LEX_CREATE_TMP_TABLE	1
#define HA_LEX_CREATE_IF_NOT_EXISTS 2
#define HA_LEX_CREATE_TABLE_LIKE 4
#define HA_OPTION_NO_CHECKSUM	(1L << 17)
#define HA_OPTION_NO_DELAY_KEY_WRITE (1L << 18)
#define HA_MAX_REC_LENGTH	65535

/* Table caching type */
#define HA_CACHE_TBL_NONTRANSACT 0
#define HA_CACHE_TBL_NOCACHE     1
#define HA_CACHE_TBL_ASKTRANSACT 2
#define HA_CACHE_TBL_TRANSACT    4

/* Options of START TRANSACTION statement (and later of SET TRANSACTION stmt) */
#define DRIZZLE_START_TRANS_OPT_WITH_CONS_SNAPSHOT 1

/* Flags for method is_fatal_error */
#define HA_CHECK_DUP_KEY 1
#define HA_CHECK_DUP_UNIQUE 2
#define HA_CHECK_DUP (HA_CHECK_DUP_KEY + HA_CHECK_DUP_UNIQUE)

enum legacy_db_type
{
  DB_TYPE_UNKNOWN=0,
  DB_TYPE_FIRST_DYNAMIC=42,
  DB_TYPE_DEFAULT=127 // Must be last
};

enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
		ROW_TYPE_DYNAMIC, ROW_TYPE_COMPRESSED,
		ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT, ROW_TYPE_PAGE };

enum column_format_type { COLUMN_FORMAT_TYPE_NOT_USED= -1,
                          COLUMN_FORMAT_TYPE_DEFAULT=   0,
                          COLUMN_FORMAT_TYPE_FIXED=     1,
                          COLUMN_FORMAT_TYPE_DYNAMIC=   2 };

enum enum_binlog_func {
  BFN_RESET_LOGS=        1,
  BFN_RESET_SLAVE=       2,
  BFN_BINLOG_WAIT=       3,
  BFN_BINLOG_END=        4,
  BFN_BINLOG_PURGE_FILE= 5
};

enum enum_binlog_command {
  LOGCOM_CREATE_TABLE,
  LOGCOM_ALTER_TABLE,
  LOGCOM_RENAME_TABLE,
  LOGCOM_DROP_TABLE,
  LOGCOM_CREATE_DB,
  LOGCOM_ALTER_DB,
  LOGCOM_DROP_DB
};

/* struct to hold information about the table that should be created */

/* Bits in used_fields */
#define HA_CREATE_USED_AUTO             (1L << 0)
#ifdef DEAD_OPTIONS
#define HA_CREATE_USED_UNION            (1L << 2)
#define HA_CREATE_USED_PASSWORD         (1L << 17)
#endif
#define HA_CREATE_USED_INSERT_METHOD    (1L << 3)
#define HA_CREATE_USED_MIN_ROWS         (1L << 4)
#define HA_CREATE_USED_MAX_ROWS         (1L << 5)
#define HA_CREATE_USED_AVG_ROW_LENGTH   (1L << 6)
#define HA_CREATE_USED_PACK_KEYS        (1L << 7)
#define HA_CREATE_USED_CHARSET          (1L << 8)
#define HA_CREATE_USED_DEFAULT_CHARSET  (1L << 9)
#define HA_CREATE_USED_DATADIR          (1L << 10)
#define HA_CREATE_USED_INDEXDIR         (1L << 11)
#define HA_CREATE_USED_ENGINE           (1L << 12)
#define HA_CREATE_USED_CHECKSUM         (1L << 13)
#define HA_CREATE_USED_DELAY_KEY_WRITE  (1L << 14)
#define HA_CREATE_USED_ROW_FORMAT       (1L << 15)
#define HA_CREATE_USED_COMMENT          (1L << 16)
#define HA_CREATE_USED_CONNECTION       (1L << 18)
#define HA_CREATE_USED_KEY_BLOCK_SIZE   (1L << 19)
#define HA_CREATE_USED_PAGE_CHECKSUM    (1L << 21)
#define HA_CREATE_USED_BLOCK_SIZE       (1L << 22)

#define MAXGTRIDSIZE 64
#define MAXBQUALSIZE 64

#define COMPATIBLE_DATA_YES 0
#define COMPATIBLE_DATA_NO  1

#define UNDEF_NODEGROUP 65535
#define NOT_A_PARTITION_ID ((uint32_t)-1)

enum ha_choice { HA_CHOICE_UNDEF, HA_CHOICE_NO, HA_CHOICE_YES };

/* Possible flags of a handlerton (there can be 32 of them) */
#define HTON_NO_FLAGS                 0
#define HTON_CLOSE_CURSORS_AT_COMMIT (1 << 0)
#define HTON_ALTER_NOT_SUPPORTED     (1 << 1) //Engine does not support alter
#define HTON_CAN_RECREATE            (1 << 2) //Delete all is used fro truncate
#define HTON_HIDDEN                  (1 << 3) //Engine does not appear in lists
#define HTON_FLUSH_AFTER_RENAME      (1 << 4)
#define HTON_NOT_USER_SELECTABLE     (1 << 5)
#define HTON_TEMPORARY_NOT_SUPPORTED (1 << 6) //Having temporary tables not supported
#define HTON_SUPPORT_LOG_TABLES      (1 << 7) //Engine supports log tables
#define HTON_NO_PARTITION            (1 << 8) //You can not partition these tables
/*
  The below two are not used (and not handled) in this milestone of this WL
  entry because there seems to be no use for them at this stage of
  implementation.
*/
#define HA_MRR_SINGLE_POINT 1
#define HA_MRR_FIXED_KEY  2

/* 
  Indicates that RANGE_SEQ_IF::next(&range) doesn't need to fill in the
  'range' parameter.
*/
#define HA_MRR_NO_ASSOCIATION 4

/* 
  The MRR user will provide ranges in key order, and MRR implementation
  must return rows in key order.
*/
#define HA_MRR_SORTED 8

/* MRR implementation doesn't have to retrieve full records */
#define HA_MRR_INDEX_ONLY 16

/* 
  The passed memory buffer is of maximum possible size, the caller can't
  assume larger buffer.
*/
#define HA_MRR_LIMITS 32


/*
  Flag set <=> default MRR implementation is used
  (The choice is made by **_info[_const]() function which may set this
   flag. SQL layer remembers the flag value and then passes it to
   multi_read_range_init().
*/
#define HA_MRR_USE_DEFAULT_IMPL 64

/*
  Used only as parameter to multi_range_read_info():
  Flag set <=> the caller guarantees that the bounds of the scanned ranges
  will not have NULL values.
*/
#define HA_MRR_NO_NULL_ENDPOINTS 128

#endif /* DRIZZLE_SERVER_DEFINITIONS_H */