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smarter ALTER TABLE - don't copy the table if only comment or default values are changed

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sql/handler.cc:
  do not delete the table in the "unkonwn" handler (makes no sense anyway)
sql/handler.h:
  more HA_CREATE_USED flags
sql/sql_lex.h:
  more ALTER_ flags, no alter_info->is_simple anymore
sql/sql_parse.cc:
  no alter_info->is_simple anymore
sql/sql_table.cc:
  do not rename the table in the "unkonwn" handler (makes no sense anyway)
  smarter ALTER TABLE - don't copy the table if only comment or default values are changed
sql/sql_yacc.yy:
  specify what ALTER is todo with flags, not alter_info->is_simple
sql/unireg.cc:
  create frm only (but not in the handler) if requested
This commit is contained in:
unknown
2004-10-21 18:10:58 +02:00
parent 00bbd9a252
commit a01f45e59d
7 changed files with 151 additions and 114 deletions
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37
sql/handler.h
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@ -139,16 +139,16 @@
#define HA_CACHE_TBL_TRANSACT 4
enum db_type
{
enum db_type
{
DB_TYPE_UNKNOWN=0,DB_TYPE_DIAB_ISAM=1,
DB_TYPE_HASH,DB_TYPE_MISAM,DB_TYPE_PISAM,
DB_TYPE_RMS_ISAM, DB_TYPE_HEAP, DB_TYPE_ISAM,
DB_TYPE_MRG_ISAM, DB_TYPE_MYISAM, DB_TYPE_MRG_MYISAM,
DB_TYPE_BERKELEY_DB, DB_TYPE_INNODB,
DB_TYPE_BERKELEY_DB, DB_TYPE_INNODB,
DB_TYPE_GEMINI, DB_TYPE_NDBCLUSTER,
DB_TYPE_EXAMPLE_DB, DB_TYPE_ARCHIVE_DB, DB_TYPE_CSV_DB,
DB_TYPE_DEFAULT // Must be last
};
@ -165,16 +165,24 @@ enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
/* struct to hold information about the table that should be created */
/* Bits in used_fields */
#define HA_CREATE_USED_AUTO 1
#define HA_CREATE_USED_RAID 2
#define HA_CREATE_USED_UNION 4
#define HA_CREATE_USED_INSERT_METHOD 8
#define HA_CREATE_USED_MIN_ROWS 16
#define HA_CREATE_USED_MAX_ROWS 32
#define HA_CREATE_USED_AVG_ROW_LENGTH 64
#define HA_CREATE_USED_PACK_KEYS 128
#define HA_CREATE_USED_CHARSET 256
#define HA_CREATE_USED_DEFAULT_CHARSET 512
#define HA_CREATE_USED_AUTO (1L << 0)
#define HA_CREATE_USED_RAID (1L << 1)
#define HA_CREATE_USED_UNION (1L << 2)
#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_PASSWORD (1L << 17)
typedef struct st_thd_trans {
void *bdb_tid;
@ -205,6 +213,7 @@ typedef struct st_ha_create_information
uint raid_type,raid_chunks;
uint merge_insert_method;
bool table_existed; /* 1 in create if table existed */
bool frm_only; /* 1 if no ha_create_table() */
} HA_CREATE_INFO;