diff options
Diffstat (limited to 'storage/innobase/include/rem0rec.h')
| -rw-r--r-- | storage/innobase/include/rem0rec.h | 173 |
1 files changed, 115 insertions, 58 deletions
diff --git a/storage/innobase/include/rem0rec.h b/storage/innobase/include/rem0rec.h index 2a522ae4837..23c25f76362 100644 --- a/storage/innobase/include/rem0rec.h +++ b/storage/innobase/include/rem0rec.h @@ -38,15 +38,6 @@ Created 5/30/1994 Heikki Tuuri #include <ostream> #include <sstream> -/* Info bit denoting the predefined minimum record: this bit is set -if and only if the record is the first user record on a non-leaf -B-tree page that is the leftmost page on its level -(PAGE_LEVEL is nonzero and FIL_PAGE_PREV is FIL_NULL). */ -#define REC_INFO_MIN_REC_FLAG 0x10UL -/* The deleted flag in info bits */ -#define REC_INFO_DELETED_FLAG 0x20UL /* when bit is set to 1, it means the - record has been delete marked */ - /* Number of extra bytes in an old-style record, in addition to the data and the offsets */ #define REC_N_OLD_EXTRA_BYTES 6 @@ -54,26 +45,6 @@ in addition to the data and the offsets */ in addition to the data and the offsets */ #define REC_N_NEW_EXTRA_BYTES 5 -/** Record status values for ROW_FORMAT=COMPACT,DYNAMIC,COMPRESSED */ -enum rec_comp_status_t { - /** User record (PAGE_LEVEL=0, heap>=PAGE_HEAP_NO_USER_LOW) */ - REC_STATUS_ORDINARY = 0, - /** Node pointer record (PAGE_LEVEL>=0, heap>=PAGE_HEAP_NO_USER_LOW) */ - REC_STATUS_NODE_PTR = 1, - /** The page infimum pseudo-record (heap=PAGE_HEAP_NO_INFIMUM) */ - REC_STATUS_INFIMUM = 2, - /** The page supremum pseudo-record (heap=PAGE_HEAP_NO_SUPREMUM) */ - REC_STATUS_SUPREMUM = 3, - /** Clustered index record that has been inserted or updated - after instant ADD COLUMN (more than dict_index_t::n_core_fields) */ - REC_STATUS_COLUMNS_ADDED = 4 -}; - -/** The dtuple_t::info_bits of the metadata pseudo-record. -@see rec_is_metadata() */ -static const byte REC_INFO_METADATA - = REC_INFO_MIN_REC_FLAG | REC_STATUS_COLUMNS_ADDED; - #define REC_NEW_STATUS 3 /* This is single byte bit-field */ #define REC_NEW_STATUS_MASK 0x7UL #define REC_NEW_STATUS_SHIFT 0 @@ -336,7 +307,7 @@ rec_comp_status_t rec_get_status(const rec_t* rec) { byte bits = rec[-REC_NEW_STATUS] & REC_NEW_STATUS_MASK; - ut_ad(bits <= REC_STATUS_COLUMNS_ADDED); + ut_ad(bits <= REC_STATUS_INSTANT); return static_cast<rec_comp_status_t>(bits); } @@ -347,12 +318,12 @@ inline void rec_set_status(rec_t* rec, byte bits) { - ut_ad(bits <= REC_STATUS_COLUMNS_ADDED); + ut_ad(bits <= REC_STATUS_INSTANT); rec[-REC_NEW_STATUS] = (rec[-REC_NEW_STATUS] & ~REC_NEW_STATUS_MASK) | bits; } -/** Get the length of added field count in a REC_STATUS_COLUMNS_ADDED record. +/** Get the length of added field count in a REC_STATUS_INSTANT record. @param[in] n_add_field number of added fields, minus one @return storage size of the field count, in bytes */ inline unsigned rec_get_n_add_field_len(ulint n_add_field) @@ -361,8 +332,26 @@ inline unsigned rec_get_n_add_field_len(ulint n_add_field) return n_add_field < 0x80 ? 1 : 2; } -/** Set the added field count in a REC_STATUS_COLUMNS_ADDED record. -@param[in,out] header variable header of a REC_STATUS_COLUMNS_ADDED record +/** Get the added field count in a REC_STATUS_INSTANT record. +@param[in,out] header variable header of a REC_STATUS_INSTANT record +@return number of added fields */ +inline unsigned rec_get_n_add_field(const byte*& header) +{ + unsigned n_fields_add = *--header; + if (n_fields_add < 0x80) { + ut_ad(rec_get_n_add_field_len(n_fields_add) == 1); + return n_fields_add; + } + + n_fields_add &= 0x7f; + n_fields_add |= unsigned(*--header) << 7; + ut_ad(n_fields_add < REC_MAX_N_FIELDS); + ut_ad(rec_get_n_add_field_len(n_fields_add) == 2); + return n_fields_add; +} + +/** Set the added field count in a REC_STATUS_INSTANT record. +@param[in,out] header variable header of a REC_STATUS_INSTANT record @param[in] n_add number of added fields, minus 1 @return record header before the number of added fields */ inline void rec_set_n_add_field(byte*& header, ulint n_add) @@ -799,20 +788,89 @@ inline ulint rec_offs_comp(const rec_offs *offsets) } /** Determine if the record is the metadata pseudo-record -in the clustered index. +in the clustered index for instant ADD COLUMN or ALTER TABLE. +@param[in] rec leaf page record +@param[in] comp 0 if ROW_FORMAT=REDUNDANT, else nonzero +@return whether the record is the metadata pseudo-record */ +inline bool rec_is_metadata(const rec_t* rec, ulint comp) +{ + bool is = !!(rec_get_info_bits(rec, comp) & REC_INFO_MIN_REC_FLAG); + ut_ad(!is || !comp || rec_get_status(rec) == REC_STATUS_INSTANT); + return is; +} + +/** Determine if the record is the metadata pseudo-record +in the clustered index for instant ADD COLUMN or ALTER TABLE. +@param[in] rec leaf page record +@param[in] index index of the record +@return whether the record is the metadata pseudo-record */ +inline bool rec_is_metadata(const rec_t* rec, const dict_index_t& index) +{ + bool is = rec_is_metadata(rec, dict_table_is_comp(index.table)); + ut_ad(!is || index.is_instant()); + return is; +} + +/** Determine if the record is the metadata pseudo-record +in the clustered index for instant ADD COLUMN (not other ALTER TABLE). +@param[in] rec leaf page record +@param[in] comp 0 if ROW_FORMAT=REDUNDANT, else nonzero +@return whether the record is the metadata pseudo-record */ +inline bool rec_is_add_metadata(const rec_t* rec, ulint comp) +{ + bool is = rec_get_info_bits(rec, comp) == REC_INFO_MIN_REC_FLAG; + ut_ad(!is || !comp || rec_get_status(rec) == REC_STATUS_INSTANT); + return is; +} + +/** Determine if the record is the metadata pseudo-record +in the clustered index for instant ADD COLUMN (not other ALTER TABLE). @param[in] rec leaf page record @param[in] index index of the record @return whether the record is the metadata pseudo-record */ -inline bool rec_is_metadata(const rec_t* rec, const dict_index_t* index) +inline bool rec_is_add_metadata(const rec_t* rec, const dict_index_t& index) +{ + bool is = rec_is_add_metadata(rec, dict_table_is_comp(index.table)); + ut_ad(!is || index.is_instant()); + return is; +} + +/** Determine if the record is the metadata pseudo-record +in the clustered index for instant ALTER TABLE (not plain ADD COLUMN). +@param[in] rec leaf page record +@param[in] comp 0 if ROW_FORMAT=REDUNDANT, else nonzero +@return whether the record is the ALTER TABLE metadata pseudo-record */ +inline bool rec_is_alter_metadata(const rec_t* rec, ulint comp) +{ + bool is = !(~rec_get_info_bits(rec, comp) + & (REC_INFO_MIN_REC_FLAG | REC_INFO_DELETED_FLAG)); + ut_ad(!is || rec_is_metadata(rec, comp)); + return is; +} + +/** Determine if the record is the metadata pseudo-record +in the clustered index for instant ALTER TABLE (not plain ADD COLUMN). +@param[in] rec leaf page record +@param[in] index index of the record +@return whether the record is the ALTER TABLE metadata pseudo-record */ +inline bool rec_is_alter_metadata(const rec_t* rec, const dict_index_t& index) { - bool is = rec_get_info_bits(rec, dict_table_is_comp(index->table)) - & REC_INFO_MIN_REC_FLAG; - ut_ad(!is || index->is_instant()); - ut_ad(!is || !dict_table_is_comp(index->table) - || rec_get_status(rec) == REC_STATUS_COLUMNS_ADDED); + bool is = rec_is_alter_metadata(rec, dict_table_is_comp(index.table)); + ut_ad(!is || index.is_dummy || index.is_instant()); return is; } +/** Determine if a record is delete-marked (not a metadata pseudo-record). +@param[in] rec record +@param[in] comp nonzero if ROW_FORMAT!=REDUNDANT +@return whether the record is a delete-marked user record */ +inline bool rec_is_delete_marked(const rec_t* rec, ulint comp) +{ + return (rec_get_info_bits(rec, comp) + & (REC_INFO_MIN_REC_FLAG | REC_INFO_DELETED_FLAG)) + == REC_INFO_DELETED_FLAG; +} + /** Get the nth field from an index. @param[in] rec index record @param[in] index index @@ -830,6 +888,7 @@ rec_get_nth_cfield( ulint* len) { ut_ad(rec_offs_validate(rec, index, offsets)); + if (!rec_offs_nth_default(offsets, n)) { return rec_get_nth_field(rec, offsets, n, len); } @@ -976,7 +1035,7 @@ rec_copy( @param[in] fields data fields @param[in] n_fields number of data fields @param[out] extra record header size -@param[in] status REC_STATUS_ORDINARY or REC_STATUS_COLUMNS_ADDED +@param[in] status REC_STATUS_ORDINARY or REC_STATUS_INSTANT @return total size, in bytes */ ulint rec_get_converted_size_temp( @@ -993,7 +1052,7 @@ rec_get_converted_size_temp( @param[in,out] offsets offsets to the fields; in: rec_offs_n_fields(offsets) @param[in] n_core number of core fields (index->n_core_fields) @param[in] def_val default values for non-core fields -@param[in] status REC_STATUS_ORDINARY or REC_STATUS_COLUMNS_ADDED */ +@param[in] status REC_STATUS_ORDINARY or REC_STATUS_INSTANT */ void rec_init_offsets_temp( const rec_t* rec, @@ -1020,8 +1079,7 @@ rec_init_offsets_temp( @param[in] index clustered or secondary index @param[in] fields data fields @param[in] n_fields number of data fields -@param[in] status REC_STATUS_ORDINARY or REC_STATUS_COLUMNS_ADDED -*/ +@param[in] status REC_STATUS_ORDINARY or REC_STATUS_INSTANT */ void rec_convert_dtuple_to_temp( rec_t* rec, @@ -1084,21 +1142,20 @@ rec_get_converted_size_comp_prefix( ulint n_fields,/*!< in: number of data fields */ ulint* extra) /*!< out: extra size */ MY_ATTRIBUTE((warn_unused_result, nonnull(1,2))); -/**********************************************************//** -Determines the size of a data tuple in ROW_FORMAT=COMPACT. + +/** Determine the size of a record in ROW_FORMAT=COMPACT. +@param[in] index record descriptor. dict_table_is_comp() + is assumed to hold, even if it doesn't +@param[in] tuple logical record +@param[out] extra extra size @return total size */ ulint rec_get_converted_size_comp( -/*========================*/ - const dict_index_t* index, /*!< in: record descriptor; - dict_table_is_comp() is - assumed to hold, even if - it does not */ - rec_comp_status_t status, /*!< in: status bits of the record */ - const dfield_t* fields, /*!< in: array of data fields */ - ulint n_fields,/*!< in: number of data fields */ - ulint* extra) /*!< out: extra size */ - MY_ATTRIBUTE((nonnull(1,3))); + const dict_index_t* index, + const dtuple_t* tuple, + ulint* extra) + MY_ATTRIBUTE((nonnull(1,2))); + /**********************************************************//** The following function returns the size of a data tuple when converted to a physical record. @@ -1273,7 +1330,7 @@ public: } /** Destructor */ - virtual ~rec_printer() {} + ~rec_printer() override {} private: /** Copy constructor */ |