mirror of
https://github.com/MariaDB/server.git
synced 2025-08-01 03:47:19 +03:00
handler interface cleanups:
more logical table/index_flags
return HA_ERR_WRONG_COMMAND instead of abstract methods where appropriate
max_keys and other limits renamed to max_supported_keys/etc
max_keys/etc are now wrappers to max_supported_keys/etc
ha_index_init/ha_rnd_init/ha_index_end/ha_rnd_end are now wrappers to real {index,rnd}_{init,end} to enforce strict pairing
include/myisam.h:
increasing myisam_max_temp_file_length
include/my_base.h:
handler interface cleanup
myisam/mi_static.c:
warning removed
mysql-test/Makefile.am:
followup
mysql-test/r/fulltext.result:
fulltext indexes are not ordered
mysql-test/r/rpl_user_variables.result:
followup
sql/field.cc:
index_flags
sql/filesort.cc:
rnd_init -> ha_rnd_init
rnd_end -> ha_rnd_end
sql/ha_berkeley.cc:
cleanup
sql/ha_berkeley.h:
table/index_flags revamped
sql/ha_heap.cc:
ensure index is accessed only after index_init (esp. important for temp tables)
sql/ha_heap.h:
table/index_flags revamped
sql/ha_innodb.cc:
don't workaround MySQL sloppiness
sql/ha_innodb.h:
table/index_flags revamped
sql/ha_isam.h:
table/index_flags revamped
sql/ha_isammrg.h:
table/index_flags revamped
sql/ha_myisam.cc:
ensure index is accessed only after index_init (esp. important for temp tables)
sql/ha_myisam.h:
table/index_flags revamped
sql/ha_myisammrg.h:
table/index_flags revamped
sql/handler.cc:
handler interface cleanups
sql/handler.h:
handler interface cleanups:
more logical table/index_flags
return HA_ERR_WRONG_COMMAND instead of abstract methods
max_keys and other limits renamed to max_supported_keys/etc
max_keys/etc are now wrappers to max_supported_keys/etc
ha_index_init/ha_rnd_init/ha_index_end/ha_rnd_end are now wrappers to enforce strict pairing
sql/item_subselect.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/lex.h:
renamed to avoid conflicts
sql/opt_range.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
table/index_flags cleanup
sql/opt_range.h:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/opt_sum.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
table/index_flags cleanup
sql/records.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/sql_acl.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/sql_cache.cc:
cleanup
sql/sql_delete.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/sql_handler.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/sql_help.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/sql_insert.cc:
table/index_flags cleanup
sql/sql_select.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
table/index_flags cleanup
sql/sql_table.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
table/index_flags cleanup
sql/sql_update.cc:
index_init/index_end/rnd_init/rnd_end strict pairing fixed
sql/sql_yacc.yy:
INDEX -> INDEX_SYM
sql/table.cc:
table/index_flags cleanup
This commit is contained in:
unknown
260
sql/handler.h
260
sql/handler.h
@ -45,51 +45,42 @@
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#define HA_ADMIN_REJECT -6
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/* Bits in table_flags() to show what database can do */
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#define HA_READ_RND_SAME 1 /* Read RND-record to KEY-record
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(To update with RND-read) */
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#define HA_KEYPOS_TO_RNDPOS 2 /* ha_info gives pos to record */
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#define HA_TABLE_SCAN_ON_INDEX 4 /* No separate data/index file */
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#define HA_REC_NOT_IN_SEQ 8 /* ha_info don't return recnumber;
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#define HA_READ_RND_SAME (1 << 0) /* can switch index during the scan
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with ::rnd_same() - not used yet.
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see mi_rsame/heap_rsame/myrg_rsame */
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#define HA_TABLE_SCAN_ON_INDEX (1 << 2) /* No separate data/index file */
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#define HA_REC_NOT_IN_SEQ (1 << 3) /* ha_info don't return recnumber;
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It returns a position to ha_r_rnd */
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#define HA_HAS_GEOMETRY (1 << 4)
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#define HA_CAN_GEOMETRY (1 << 4)
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#define HA_FAST_KEY_READ (1 << 5) /* no need for a record cache in filesort */
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#define HA_KEY_READ_WRONG_STR (1 << 6) /* keyread returns converted strings */
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#define HA_NULL_KEY (1 << 7) /* One can have keys with NULL */
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#define HA_DUPP_POS (1 << 8) /* ha_position() gives dupp row */
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#define HA_NULL_IN_KEY (1 << 7) /* One can have keys with NULL */
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#define HA_DUPP_POS (1 << 8) /* ha_position() gives dup row */
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#define HA_NO_BLOBS (1 << 9) /* Doesn't support blobs */
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#define HA_BLOB_KEY (1 << 10) /* key on blob */
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#define HA_AUTO_PART_KEY (1 << 11)
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#define HA_REQUIRE_PRIMARY_KEY (1 << 12)
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#define HA_CAN_INDEX_BLOBS (1 << 10)
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#define HA_AUTO_PART_KEY (1 << 11) /* auto-increment in multi-part key */
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#define HA_REQUIRE_PRIMARY_KEY (1 << 12) /* .. and can't create a hidden one */
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#define HA_NOT_EXACT_COUNT (1 << 13)
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#define HA_NO_WRITE_DELAYED (1 << 14)
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#define HA_CAN_INSERT_DELAYED (1 << 14) /* only handlers with table-level locks
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need no special code to support
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INSERT DELAYED */
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#define HA_PRIMARY_KEY_IN_READ_INDEX (1 << 15)
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#define HA_DROP_BEFORE_CREATE (1 << 16)
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#define HA_NOT_READ_AFTER_KEY (1 << 17)
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#define HA_NOT_DELETE_WITH_CACHE (1 << 18)
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#define HA_NO_TEMP_TABLES (1 << 19)
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#define HA_NO_PREFIX_CHAR_KEYS (1 << 20)
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#define HA_CAN_FULLTEXT (1 << 21)
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#define HA_CAN_SQL_HANDLER (1 << 22)
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#define HA_NO_AUTO_INCREMENT (1 << 23)
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#define HA_HAS_CHECKSUM (1 << 24)
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/*
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Next record gives next record according last record read (even
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if database is updated after read). Not used at this point.
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*/
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#define HA_LASTKEY_ORDER (1 << 25)
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/* Table data are stored in separate files */
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/* Table data are stored in separate files (for lower_case_table_names) */
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#define HA_FILE_BASED (1 << 26)
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/* bits in index_flags(index_number) for what you can do with index */
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#define HA_WRONG_ASCII_ORDER 1 /* Can't use sorting through key */
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#define HA_READ_NEXT 2 /* Read next record with same key */
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#define HA_READ_PREV 4 /* Read prev. record with same key */
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#define HA_READ_ORDER 8 /* Read through record-keys in order */
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#define HA_READ_NEXT 1 /* TODO really use this flag */
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#define HA_READ_PREV 2 /* supports ::index_prev */
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#define HA_READ_ORDER 4 /* index_next/prev follow sort order */
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#define HA_READ_RANGE 8 /* can find all records in a range */
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#define HA_ONLY_WHOLE_INDEX 16 /* Can't use part key searches */
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#define HA_NOT_READ_PREFIX_LAST 32 /* No support for index_read_last() */
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#define HA_KEY_READ_ONLY 64 /* Support HA_EXTRA_KEYREAD */
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#define HA_KEYREAD_ONLY 64 /* Support HA_EXTRA_KEYREAD */
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/* operations for disable/enable indexes */
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#define HA_KEY_SWITCH_NONUNIQ 0
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@ -108,9 +99,6 @@
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#define HA_DDL_WITH_LOCK 2 /* Can create/drop with locked table */
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#define HA_DDL_ONLINE 4 /* Can create/drop without lock */
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/* Return value for ddl methods */
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#define HA_DDL_NOT_IMPLEMENTED -1
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/*
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Parameters for open() (in register form->filestat)
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HA_GET_INFO does an implicit HA_ABORT_IF_LOCKED
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@ -239,6 +227,18 @@ class handler :public Sql_alloc
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protected:
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struct st_table *table; /* The table definition */
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virtual int index_init(uint idx) { active_index=idx; return 0; }
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virtual int index_end() { active_index=MAX_KEY; return 0; }
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/*
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rnd_init() can be called two times without rnd_end() in between
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(it only makes sense if scan=1).
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then the second call should prepare for the new table scan (e.g
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if rnd_init allocates the cursor, second call should position it
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to the start of the table, no need to deallocate and allocate it again
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*/
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virtual int rnd_init(bool scan) =0;
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virtual int rnd_end() { return 0; }
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public:
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byte *ref; /* Pointer to current row */
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byte *dupp_ref; /* Pointer to dupp row */
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@ -255,6 +255,7 @@ public:
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time_t create_time; /* When table was created */
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time_t check_time;
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time_t update_time;
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enum {NONE=0, INDEX, RND} inited;
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/* The following are for read_range() */
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key_range save_end_range, *end_range;
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@ -279,11 +280,11 @@ public:
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delete_length(0), auto_increment_value(0),
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records(0), deleted(0), mean_rec_length(0),
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create_time(0), check_time(0), update_time(0),
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key_used_on_scan(MAX_KEY), active_index(MAX_REF_PARTS),
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key_used_on_scan(MAX_KEY), active_index(MAX_KEY),
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ref_length(sizeof(my_off_t)), block_size(0),
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raid_type(0), ft_handler(0), implicit_emptied(0)
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raid_type(0), ft_handler(0), implicit_emptied(0), inited(NONE)
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{}
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virtual ~handler(void) {}
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virtual ~handler(void) { /* TODO: DBUG_ASSERT(inited == NONE); */ }
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int ha_open(const char *name, int mode, int test_if_locked);
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void update_timestamp(byte *record);
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void update_auto_increment();
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@ -299,88 +300,140 @@ public:
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virtual bool has_transactions(){ return 0;}
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virtual uint extra_rec_buf_length() { return 0; }
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virtual ha_rows estimate_number_of_rows() { return records+EXTRA_RECORDS; }
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virtual const char *index_type(uint key_number) { return "";}
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virtual int index_init(uint idx) { active_index=idx; return 0;}
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virtual int index_end() {return 0; }
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virtual const char *index_type(uint key_number) { DBUG_ASSERT(0); return "";}
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int ha_index_init(uint idx)
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{
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DBUG_ASSERT(inited==NONE);
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inited=INDEX;
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return index_init(idx);
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}
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int ha_index_end()
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{
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DBUG_ASSERT(inited==INDEX);
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inited=NONE;
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return index_end();
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}
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int ha_rnd_init(bool scan=1)
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{
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DBUG_ASSERT(inited==NONE || (inited==RND && scan));
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inited=RND;
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return rnd_init(scan);
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}
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int ha_rnd_end()
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{
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DBUG_ASSERT(inited==RND);
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inited=NONE;
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return rnd_end();
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}
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/* this is neseccary in many places, e.g. in HANDLER command */
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int ha_index_or_rnd_end()
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{
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return inited == INDEX ? ha_index_end() : inited == RND ? ha_rnd_end() : 0;
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}
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uint get_index(void) const { return active_index; }
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virtual int open(const char *name, int mode, uint test_if_locked)=0;
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virtual void initialize(void) {}
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virtual int close(void)=0;
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virtual int write_row(byte * buf)=0;
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virtual int update_row(const byte * old_data, byte * new_data)=0;
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virtual int delete_row(const byte * buf)=0;
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virtual int write_row(byte * buf) { return HA_ERR_WRONG_COMMAND; }
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virtual int update_row(const byte * old_data, byte * new_data)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int delete_row(const byte * buf)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int index_read(byte * buf, const byte * key,
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uint key_len, enum ha_rkey_function find_flag)=0;
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uint key_len, enum ha_rkey_function find_flag)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int index_read_idx(byte * buf, uint index, const byte * key,
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uint key_len, enum ha_rkey_function find_flag)=0;
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virtual int index_next(byte * buf)=0;
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virtual int index_prev(byte * buf)=0;
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virtual int index_first(byte * buf)=0;
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virtual int index_last(byte * buf)=0;
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uint key_len, enum ha_rkey_function find_flag);
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virtual int index_next(byte * buf)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int index_prev(byte * buf)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int index_first(byte * buf)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int index_last(byte * buf)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int index_next_same(byte *buf, const byte *key, uint keylen);
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virtual int index_read_last(byte * buf, const byte * key, uint key_len)
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{
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return (my_errno=HA_ERR_WRONG_COMMAND);
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}
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{ return (my_errno=HA_ERR_WRONG_COMMAND); }
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virtual int read_range_first(const key_range *start_key,
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const key_range *end_key,
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bool eq_range, bool sorted);
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virtual int read_range_next();
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int compare_key(key_range *range);
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virtual int ft_init()
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{ return -1; }
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virtual int ft_init() { return HA_ERR_WRONG_COMMAND; }
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virtual FT_INFO *ft_init_ext(uint flags,uint inx,const byte *key,
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uint keylen)
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{ return NULL; }
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virtual int ft_read(byte *buf) { return -1; }
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virtual int rnd_init(bool scan=1)=0;
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virtual int rnd_end() { return 0; }
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virtual int ft_read(byte *buf) { return HA_ERR_WRONG_COMMAND; }
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virtual int rnd_next(byte *buf)=0;
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virtual int rnd_pos(byte * buf, byte *pos)=0;
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virtual int read_first_row(byte *buf, uint primary_key);
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virtual int restart_rnd_next(byte *buf, byte *pos);
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/*
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The following function is only needed for tables that may be temporary
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tables during joins
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*/
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virtual int restart_rnd_next(byte *buf, byte *pos)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual int rnd_same(byte *buf, uint inx)
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{ return HA_ERR_WRONG_COMMAND; }
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virtual ha_rows records_in_range(uint inx, key_range *min_key,
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key_range *max_key)
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{ return (ha_rows) 10; }
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virtual void position(const byte *record)=0;
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virtual my_off_t row_position() { return HA_OFFSET_ERROR; }
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virtual void info(uint)=0;
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virtual int extra(enum ha_extra_function operation)=0;
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virtual int extra(enum ha_extra_function operation)
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{ return 0; }
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virtual int extra_opt(enum ha_extra_function operation, ulong cache_size)
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{
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return extra(operation);
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}
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{ return extra(operation); }
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virtual int reset() { return extra(HA_EXTRA_RESET); }
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virtual int external_lock(THD *thd, int lock_type)=0;
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virtual void unlock_row() {}
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virtual int start_stmt(THD *thd) {return 0;}
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virtual int delete_all_rows();
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/*
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This is called to delete all rows in a table
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If the handler don't support this, then this function will
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return HA_ERR_WRONG_COMMAND and MySQL will delete the rows one
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by one.
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*/
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virtual int delete_all_rows()
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{ return (my_errno=HA_ERR_WRONG_COMMAND); }
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virtual longlong get_auto_increment();
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virtual void update_create_info(HA_CREATE_INFO *create_info) {}
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virtual int check(THD* thd, HA_CHECK_OPT* check_opt );
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virtual int repair(THD* thd, HA_CHECK_OPT* check_opt);
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virtual bool check_and_repair(THD *thd) {return 1;}
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virtual int optimize(THD* thd,HA_CHECK_OPT* check_opt);
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virtual int analyze(THD* thd, HA_CHECK_OPT* check_opt);
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virtual int assign_to_keycache(THD* thd, HA_CHECK_OPT* check_opt);
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virtual int preload_keys(THD* thd, HA_CHECK_OPT* check_opt);
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virtual int backup(THD* thd, HA_CHECK_OPT* check_opt);
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/* admin commands - called from mysql_admin_table */
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virtual int check(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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virtual int backup(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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/*
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restore assumes .frm file must exist, and that generate_table() has been
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called; It will just copy the data file and run repair.
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*/
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virtual int restore(THD* thd, HA_CHECK_OPT* check_opt);
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virtual int dump(THD* thd, int fd = -1) { return ER_DUMP_NOT_IMPLEMENTED; }
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virtual int restore(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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virtual int repair(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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virtual int optimize(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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virtual int analyze(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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virtual int assign_to_keycache(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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virtual int preload_keys(THD* thd, HA_CHECK_OPT* check_opt)
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{ return HA_ADMIN_NOT_IMPLEMENTED; }
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/* end of the list of admin commands */
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virtual bool check_and_repair(THD *thd) { return HA_ERR_WRONG_COMMAND; }
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virtual int dump(THD* thd, int fd = -1) { return HA_ERR_WRONG_COMMAND; }
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virtual int disable_indexes(uint mode) { return HA_ERR_WRONG_COMMAND; }
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virtual int enable_indexes(uint mode) { return HA_ERR_WRONG_COMMAND; }
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virtual int indexes_are_disabled(void) {return 0;}
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virtual void start_bulk_insert(ha_rows rows) {}
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virtual int end_bulk_insert() {return 0; }
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virtual int discard_or_import_tablespace(my_bool discard) {return -1;}
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// not implemented by default
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virtual int net_read_dump(NET* net)
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{ return ER_DUMP_NOT_IMPLEMENTED; }
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virtual int discard_or_import_tablespace(my_bool discard)
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{return HA_ERR_WRONG_COMMAND;}
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virtual int net_read_dump(NET* net) { return HA_ERR_WRONG_COMMAND; }
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virtual char *update_table_comment(const char * comment)
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{ return (char*) comment;}
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virtual void append_create_info(String *packet) {}
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@ -395,38 +448,47 @@ public:
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virtual const char *table_type() const =0;
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virtual const char **bas_ext() const =0;
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virtual ulong table_flags(void) const =0;
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virtual ulong index_flags(uint idx) const
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{
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return (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_KEY_READ_ONLY);
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}
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virtual ulong index_flags(uint idx, uint part=~0) const =0;
|
||||
virtual ulong index_ddl_flags(KEY *wanted_index) const
|
||||
{
|
||||
return (HA_DDL_SUPPORT);
|
||||
}
|
||||
{ return (HA_DDL_SUPPORT); }
|
||||
virtual int add_index(TABLE *table_arg, KEY *key_info, uint num_of_keys)
|
||||
{
|
||||
my_error(ER_NOT_SUPPORTED_YET, MYF(0), "online add index");
|
||||
return (HA_DDL_NOT_IMPLEMENTED);
|
||||
}
|
||||
{ return (HA_ERR_WRONG_COMMAND); }
|
||||
virtual int drop_index(TABLE *table_arg, uint *key_num, uint num_of_keys)
|
||||
{
|
||||
my_error(ER_NOT_SUPPORTED_YET, MYF(0), "online drop index");
|
||||
return (HA_DDL_NOT_IMPLEMENTED);
|
||||
}
|
||||
virtual uint max_record_length() const =0;
|
||||
virtual uint max_keys() const =0;
|
||||
virtual uint max_key_parts() const =0;
|
||||
virtual uint max_key_length()const =0;
|
||||
virtual uint max_key_part_length() { return 255; }
|
||||
{ return (HA_ERR_WRONG_COMMAND); }
|
||||
|
||||
uint max_record_length() const
|
||||
{ return min(HA_MAX_REC_LENGTH, max_supported_record_length()); }
|
||||
uint max_keys() const
|
||||
{ return min(MAX_KEY, max_supported_keys()); }
|
||||
uint max_key_parts() const
|
||||
{ return min(MAX_REF_PARTS, max_supported_key_parts()); }
|
||||
uint max_key_length() const
|
||||
{ return min(MAX_KEY_LENGTH, max_supported_key_length()); }
|
||||
uint max_key_part_length()
|
||||
{ return min(MAX_KEY_LENGTH, max_supported_key_part_length()); }
|
||||
|
||||
virtual uint max_supported_record_length() const { return HA_MAX_REC_LENGTH; }
|
||||
virtual uint max_supported_keys() const { return 0; }
|
||||
virtual uint max_supported_key_parts() const { return MAX_REF_PARTS; }
|
||||
virtual uint max_supported_key_length() const { return MAX_KEY_LENGTH; }
|
||||
virtual uint max_supported_key_part_length() { return 255; }
|
||||
virtual uint min_record_length(uint options) const { return 1; }
|
||||
|
||||
virtual bool low_byte_first() const { return 1; }
|
||||
virtual uint checksum() const { return 0; }
|
||||
virtual bool is_crashed() const { return 0; }
|
||||
virtual bool auto_repair() const { return 0; }
|
||||
|
||||
/*
|
||||
default rename_table() and delete_table() rename/delete files with a
|
||||
given name and extensions from bas_ext()
|
||||
*/
|
||||
virtual int rename_table(const char *from, const char *to);
|
||||
virtual int delete_table(const char *name);
|
||||
|
||||
virtual int create(const char *name, TABLE *form, HA_CREATE_INFO *info)=0;
|
||||
|
||||
/* lock_count() can be more than one if the table is a MERGE */
|
||||
virtual uint lock_count(void) const { return 1; }
|
||||
virtual THR_LOCK_DATA **store_lock(THD *thd,
|
||||
THR_LOCK_DATA **to,
|
||||
@ -438,8 +500,6 @@ public:
|
||||
Is query with this table cachable (have sense only for ASKTRANSACT
|
||||
tables)
|
||||
*/
|
||||
static bool caching_allowed(THD* thd, char* table_key,
|
||||
uint key_length, uint8 cahe_type);
|
||||
};
|
||||
|
||||
/* Some extern variables used with handlers */
|
||||
@ -456,6 +516,8 @@ extern TYPELIB tx_isolation_typelib;
|
||||
|
||||
#define ha_supports_generate(T) (T != DB_TYPE_INNODB)
|
||||
|
||||
bool ha_caching_allowed(THD* thd, char* table_key,
|
||||
uint key_length, uint8 cache_type);
|
||||
enum db_type ha_resolve_by_name(const char *name, uint namelen);
|
||||
const char *ha_get_storage_engine(enum db_type db_type);
|
||||
handler *get_new_handler(TABLE *table, enum db_type db_type);
|
||||
|
||||
Reference in New Issue
Block a user