mirror of
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d33b523271
Fixed BUGS: #3300: "UPDATE statement with no index column in where condition locks all rows" Implement semi-consistent read to reduce lock conflicts at the cost of breaking serializability. ha_innobase::unlock_row(): reset the "did semi consistent read" flag ha_innobase::was_semi_consistent_read(), ha_innobase::try_semi_consistent_read(): new methods row_prebuilt_t, row_create_prebuilt(): add field row_read_type for keeping track of semi-consistent reads row_vers_build_for_semi_consistent_read(), row_sel_build_committed_vers_for_mysql(): new functions row_search_for_mysql(): implement semi-consistent reads #9802: "Foreign key checks disallow alter table". Added test cases. #12456: "Cursor shows incorrect data - DML does not affect, probably caching" This patch implements a high-granularity read view to be used with cursors. In this high-granularity consistent read view modifications done by the creating transaction after the cursor is created or future transactions are not visible. But those modifications that transaction did before the cursor was created are visible. #12701: "Support >4GB buffer pool and log files on 64-bit Windows" Do not call os_file_create_tmpfile() at runtime. Instead, create all tempfiles at startup and guard access to them with mutexes. #13778: "If FOREIGN_KEY_CHECKS=0, one can create inconsistent FOREIGN KEYs". When FOREIGN_KEY_CHECKS=0 we still need to check that datatypes between foreign key references are compatible. #14189: "VARBINARY and BINARY variables: trailing space ignored with InnoDB" innobase_init(): Assert that DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number. dtype_get_pad_char(): Do not pad VARBINARY or BINARY columns. row_ins_cascade_calc_update_vec(): Refuse ON UPDATE CASCADE when trying to change the length of a VARBINARY column that refers to or is referenced by a BINARY column. BINARY columns are no longer padded on comparison, and thus they cannot be padded on storage either. #14747: "Race condition can cause btr_search_drop_page_hash_index() to crash" Note that buf_block_t::index should be protected by btr_search_latch or an s-latch or x-latch on the index page. btr_search_drop_page_hash_index(): Read block->index while holding btr_search_latch and use the cached value in the loop. Remove some redundant assertions. #15108: "mysqld crashes when innodb_log_file_size is set > 4G" #15308: "Problem of Order with Enum Column in Primary Key" #15550: "mysqld crashes in printing a FOREIGN KEY error in InnoDB" row_ins_foreign_report_add_err(): When printing the parent record, use the index in the parent table rather than the index in the child table. #15653: "Slow inserts to InnoDB if many thousands of .ibd files" Keep track on unflushed modifications to file spaces. When there are tens of thousands of file spaces, flushing all files in fil_flush_file_spaces() would be very slow. fil_flush_file_spaces(): Only flush unflushed file spaces. fil_space_t, fil_system_t: Add a list of unflushed spaces. #15991: "innodb-file-per-table + symlink database + rename = cr" os_file_handle_error(): Map the error codes EXDEV, ENOTDIR, and EISDIR to the new code OS_FILE_PATH_ERROR. Treat this code as OS_FILE_PATH_ERROR. This fixes the crash on RENAME TABLE when the .ibd file is a symbolic link to a different file system. #16157: "InnoDB crashes when main location settings are empty" This patch is from Heikki. #16298: "InnoDB segfaults in INSERTs in upgrade of 4.0 -> 5.0 tables with VARCHAR BINARY" dict_load_columns(): Set the charset-collation code DATA_MYSQL_BINARY_CHARSET_COLL for those binary string columns that lack a charset-collation code, i.e., the tables were created with an older version of MySQL/InnoDB than 4.1.2. #16229: "MySQL/InnoDB uses full explicit table locks in trigger processing" Take a InnoDB table lock only if user has explicitly requested a table lock. Added some additional comments to store_lock() and external_lock(). #16387: "InnoDB crash when dropping a foreign key <table>_ibfk_0" Do not mistake TABLENAME_ibfk_0 for auto-generated id. dict_table_get_highest_foreign_id(): Ignore foreign constraint identifiers starting with the pattern TABLENAME_ibfk_0. #16582: "InnoDB: Error in an adaptive hash index pointer to page" Account for a race condition when dropping the adaptive hash index for a B-tree page. btr_search_drop_page_hash_index(): Retry the operation if a hash index with different parameters was built meanwhile. Add diagnostics for the case that hash node pointers to the page remain. btr_search_info_update_hash(), btr_search_info_update_slow(): Document the parameter "info" as in/out. #16814: "SHOW INNODB STATUS format error in LATEST FOREIGN KEY ERROR section" Add a missing newline to the LAST FOREIGN KEY ERROR section in SHOW INNODB STATUS output. dict_foreign_error_report(): Always print a newline after invoking dict_print_info_on_foreign_key_in_create_format(). #16827: "Better InnoDB error message if ibdata files omitted from my.cnf" #17126: "CHECK TABLE on InnoDB causes a short hang during check of adaptive hash" CHECK TABLE blocking other queries, by releasing the btr_search_latch periodically during the adaptive hash table validation. #17405: "Valgrind: conditional jump or move depends on unititialised values" buf_block_init(): Reset magic_n, buf_fix_count and io_fix to avoid testing uninitialized variables.
432 lines
14 KiB
C
432 lines
14 KiB
C
/************************************************************************
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SQL data field and tuple
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(c) 1994-1996 Innobase Oy
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Created 5/30/1994 Heikki Tuuri
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*************************************************************************/
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#ifndef data0data_h
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#define data0data_h
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#include "univ.i"
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#include "data0types.h"
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#include "data0type.h"
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#include "mem0mem.h"
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#include "dict0types.h"
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typedef struct big_rec_struct big_rec_t;
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/* Some non-inlined functions used in the MySQL interface: */
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void
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dfield_set_data_noninline(
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dfield_t* field, /* in: field */
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void* data, /* in: data */
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ulint len); /* in: length or UNIV_SQL_NULL */
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void*
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dfield_get_data_noninline(
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dfield_t* field); /* in: field */
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ulint
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dfield_get_len_noninline(
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dfield_t* field); /* in: field */
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ulint
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dtuple_get_n_fields_noninline(
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dtuple_t* tuple); /* in: tuple */
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dfield_t*
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dtuple_get_nth_field_noninline(
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dtuple_t* tuple, /* in: tuple */
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ulint n); /* in: index of field */
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/*************************************************************************
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Gets pointer to the type struct of SQL data field. */
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UNIV_INLINE
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dtype_t*
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dfield_get_type(
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/*============*/
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/* out: pointer to the type struct */
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dfield_t* field); /* in: SQL data field */
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/*************************************************************************
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Sets the type struct of SQL data field. */
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UNIV_INLINE
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void
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dfield_set_type(
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/*============*/
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dfield_t* field, /* in: SQL data field */
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dtype_t* type); /* in: pointer to data type struct */
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/*************************************************************************
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Gets pointer to the data in a field. */
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UNIV_INLINE
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void*
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dfield_get_data(
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/*============*/
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/* out: pointer to data */
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dfield_t* field); /* in: field */
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/*************************************************************************
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Gets length of field data. */
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UNIV_INLINE
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ulint
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dfield_get_len(
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/*===========*/
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/* out: length of data; UNIV_SQL_NULL if
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SQL null data */
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dfield_t* field); /* in: field */
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/*************************************************************************
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Sets length in a field. */
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UNIV_INLINE
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void
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dfield_set_len(
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/*===========*/
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dfield_t* field, /* in: field */
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ulint len); /* in: length or UNIV_SQL_NULL */
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/*************************************************************************
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Sets pointer to the data and length in a field. */
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UNIV_INLINE
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void
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dfield_set_data(
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/*============*/
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dfield_t* field, /* in: field */
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const void* data, /* in: data */
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ulint len); /* in: length or UNIV_SQL_NULL */
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/**************************************************************************
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Writes an SQL null field full of zeros. */
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UNIV_INLINE
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void
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data_write_sql_null(
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/*================*/
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byte* data, /* in: pointer to a buffer of size len */
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ulint len); /* in: SQL null size in bytes */
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/*************************************************************************
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Copies the data and len fields. */
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UNIV_INLINE
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void
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dfield_copy_data(
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/*=============*/
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dfield_t* field1, /* in: field to copy to */
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dfield_t* field2);/* in: field to copy from */
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/*************************************************************************
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Copies a data field to another. */
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UNIV_INLINE
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void
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dfield_copy(
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/*========*/
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dfield_t* field1, /* in: field to copy to */
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dfield_t* field2);/* in: field to copy from */
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/*************************************************************************
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Tests if data length and content is equal for two dfields. */
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UNIV_INLINE
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ibool
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dfield_datas_are_binary_equal(
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/*==========================*/
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/* out: TRUE if equal */
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dfield_t* field1, /* in: field */
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dfield_t* field2);/* in: field */
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/*************************************************************************
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Tests if dfield data length and content is equal to the given. */
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ibool
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dfield_data_is_binary_equal(
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/*========================*/
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/* out: TRUE if equal */
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dfield_t* field, /* in: field */
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ulint len, /* in: data length or UNIV_SQL_NULL */
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byte* data); /* in: data */
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/*************************************************************************
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Gets number of fields in a data tuple. */
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UNIV_INLINE
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ulint
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dtuple_get_n_fields(
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/*================*/
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/* out: number of fields */
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dtuple_t* tuple); /* in: tuple */
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/*************************************************************************
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Gets nth field of a tuple. */
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UNIV_INLINE
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dfield_t*
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dtuple_get_nth_field(
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/*=================*/
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/* out: nth field */
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dtuple_t* tuple, /* in: tuple */
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ulint n); /* in: index of field */
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/*************************************************************************
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Gets info bits in a data tuple. */
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UNIV_INLINE
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ulint
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dtuple_get_info_bits(
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/*=================*/
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/* out: info bits */
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dtuple_t* tuple); /* in: tuple */
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/*************************************************************************
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Sets info bits in a data tuple. */
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UNIV_INLINE
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void
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dtuple_set_info_bits(
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/*=================*/
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dtuple_t* tuple, /* in: tuple */
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ulint info_bits); /* in: info bits */
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/*************************************************************************
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Gets number of fields used in record comparisons. */
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UNIV_INLINE
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ulint
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dtuple_get_n_fields_cmp(
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/*====================*/
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/* out: number of fields used in comparisons
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in rem0cmp.* */
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dtuple_t* tuple); /* in: tuple */
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/*************************************************************************
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Gets number of fields used in record comparisons. */
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UNIV_INLINE
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void
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dtuple_set_n_fields_cmp(
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/*====================*/
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dtuple_t* tuple, /* in: tuple */
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ulint n_fields_cmp); /* in: number of fields used in
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comparisons in rem0cmp.* */
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/**************************************************************
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Creates a data tuple to a memory heap. The default value for number
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of fields used in record comparisons for this tuple is n_fields. */
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UNIV_INLINE
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dtuple_t*
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dtuple_create(
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/*==========*/
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/* out, own: created tuple */
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mem_heap_t* heap, /* in: memory heap where the tuple
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is created */
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ulint n_fields); /* in: number of fields */
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/*************************************************************************
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Creates a dtuple for use in MySQL. */
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dtuple_t*
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dtuple_create_for_mysql(
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/*====================*/
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/* out, own created dtuple */
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void** heap, /* out: created memory heap */
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ulint n_fields); /* in: number of fields */
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/*************************************************************************
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Frees a dtuple used in MySQL. */
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void
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dtuple_free_for_mysql(
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/*==================*/
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void* heap);
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/*************************************************************************
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Sets number of fields used in a tuple. Normally this is set in
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dtuple_create, but if you want later to set it smaller, you can use this. */
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void
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dtuple_set_n_fields(
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/*================*/
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dtuple_t* tuple, /* in: tuple */
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ulint n_fields); /* in: number of fields */
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/**************************************************************
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The following function returns the sum of data lengths of a tuple. The space
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occupied by the field structs or the tuple struct is not counted. */
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UNIV_INLINE
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ulint
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dtuple_get_data_size(
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/*=================*/
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/* out: sum of data lens */
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dtuple_t* tuple); /* in: typed data tuple */
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/****************************************************************
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Returns TRUE if lengths of two dtuples are equal and respective data fields
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in them are equal when compared with collation in char fields (not as binary
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strings). */
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ibool
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dtuple_datas_are_ordering_equal(
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/*============================*/
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/* out: TRUE if length and fieds are equal
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when compared with cmp_data_data:
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NOTE: in character type fields some letters
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are identified with others! (collation) */
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dtuple_t* tuple1, /* in: tuple 1 */
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dtuple_t* tuple2);/* in: tuple 2 */
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/****************************************************************
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Folds a prefix given as the number of fields of a tuple. */
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UNIV_INLINE
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ulint
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dtuple_fold(
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/*========*/
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/* out: the folded value */
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dtuple_t* tuple, /* in: the tuple */
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ulint n_fields,/* in: number of complete fields to fold */
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ulint n_bytes,/* in: number of bytes to fold in an
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incomplete last field */
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dulint tree_id);/* in: index tree id */
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/***********************************************************************
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Sets types of fields binary in a tuple. */
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UNIV_INLINE
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void
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dtuple_set_types_binary(
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/*====================*/
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dtuple_t* tuple, /* in: data tuple */
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ulint n); /* in: number of fields to set */
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/**************************************************************************
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Checks if a dtuple contains an SQL null value. */
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UNIV_INLINE
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ibool
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dtuple_contains_null(
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/*=================*/
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/* out: TRUE if some field is SQL null */
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dtuple_t* tuple); /* in: dtuple */
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/**************************************************************
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Checks that a data field is typed. Asserts an error if not. */
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ibool
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dfield_check_typed(
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/*===============*/
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/* out: TRUE if ok */
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dfield_t* field); /* in: data field */
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/**************************************************************
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Checks that a data tuple is typed. Asserts an error if not. */
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ibool
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dtuple_check_typed(
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/*===============*/
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/* out: TRUE if ok */
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dtuple_t* tuple); /* in: tuple */
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/**************************************************************
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Checks that a data tuple is typed. */
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ibool
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dtuple_check_typed_no_assert(
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/*=========================*/
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/* out: TRUE if ok */
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dtuple_t* tuple); /* in: tuple */
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#ifdef UNIV_DEBUG
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/**************************************************************
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Validates the consistency of a tuple which must be complete, i.e,
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all fields must have been set. */
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ibool
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dtuple_validate(
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/*============*/
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/* out: TRUE if ok */
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dtuple_t* tuple); /* in: tuple */
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#endif /* UNIV_DEBUG */
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/*****************************************************************
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Pretty prints a dfield value according to its data type. */
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void
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dfield_print(
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/*=========*/
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dfield_t* dfield);/* in: dfield */
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/*****************************************************************
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Pretty prints a dfield value according to its data type. Also the hex string
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is printed if a string contains non-printable characters. */
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void
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dfield_print_also_hex(
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/*==================*/
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dfield_t* dfield); /* in: dfield */
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/*****************************************************************
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Print a dfield value using ut_print_buf. */
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void
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dfield_print_raw(
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/*=============*/
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FILE* f, /* in: output stream */
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dfield_t* dfield); /* in: dfield */
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/**************************************************************
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The following function prints the contents of a tuple. */
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void
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dtuple_print(
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/*=========*/
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FILE* f, /* in: output stream */
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dtuple_t* tuple); /* in: tuple */
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/******************************************************************
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Moves parts of long fields in entry to the big record vector so that
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the size of tuple drops below the maximum record size allowed in the
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database. Moves data only from those fields which are not necessary
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to determine uniquely the insertion place of the tuple in the index. */
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big_rec_t*
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dtuple_convert_big_rec(
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/*===================*/
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/* out, own: created big record vector,
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NULL if we are not able to shorten
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the entry enough, i.e., if there are
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too many short fields in entry */
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dict_index_t* index, /* in: index */
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dtuple_t* entry, /* in: index entry */
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ulint* ext_vec,/* in: array of externally stored fields,
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or NULL: if a field already is externally
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stored, then we cannot move it to the vector
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this function returns */
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ulint n_ext_vec);/* in: number of elements is ext_vec */
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/******************************************************************
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Puts back to entry the data stored in vector. Note that to ensure the
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fields in entry can accommodate the data, vector must have been created
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from entry with dtuple_convert_big_rec. */
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void
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dtuple_convert_back_big_rec(
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/*========================*/
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dict_index_t* index, /* in: index */
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dtuple_t* entry, /* in: entry whose data was put to vector */
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big_rec_t* vector);/* in, own: big rec vector; it is
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freed in this function */
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/******************************************************************
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Frees the memory in a big rec vector. */
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void
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dtuple_big_rec_free(
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/*================*/
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big_rec_t* vector); /* in, own: big rec vector; it is
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freed in this function */
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/*######################################################################*/
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/* Structure for an SQL data field */
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struct dfield_struct{
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void* data; /* pointer to data */
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ulint len; /* data length; UNIV_SQL_NULL if SQL null; */
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dtype_t type; /* type of data */
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};
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struct dtuple_struct {
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ulint info_bits; /* info bits of an index record:
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the default is 0; this field is used
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if an index record is built from
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a data tuple */
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ulint n_fields; /* number of fields in dtuple */
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ulint n_fields_cmp; /* number of fields which should
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be used in comparison services
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of rem0cmp.*; the index search
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is performed by comparing only these
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fields, others are ignored; the
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default value in dtuple creation is
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the same value as n_fields */
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dfield_t* fields; /* fields */
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UT_LIST_NODE_T(dtuple_t) tuple_list;
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/* data tuples can be linked into a
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list using this field */
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ulint magic_n;
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};
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#define DATA_TUPLE_MAGIC_N 65478679
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/* A slot for a field in a big rec vector */
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typedef struct big_rec_field_struct big_rec_field_t;
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struct big_rec_field_struct {
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ulint field_no; /* field number in record */
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ulint len; /* stored data len */
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byte* data; /* stored data */
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};
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/* Storage format for overflow data in a big record, that is, a record
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which needs external storage of data fields */
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struct big_rec_struct {
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mem_heap_t* heap; /* memory heap from which allocated */
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ulint n_fields; /* number of stored fields */
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big_rec_field_t* fields; /* stored fields */
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};
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#ifndef UNIV_NONINL
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#include "data0data.ic"
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#endif
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#endif
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