recovery, tolerate clustered index records whose externally stored
columns have not been written. This should remove the assertion failures
that were reported as Mantis issue#58, issue#62, issue#64.
trx_is_recv(): New function: TRUE if this transaction is rolling back
an incomplete transaction in crash recovery.
enum trx_rbmode: Rollback modes: no rollback, normal rollback, crash recovery.
btr_cur_pessimistic_delete(), btr_free_externally_stored_field(),
btr_rec_free_externally_stored_fields():
Replace the ibool parameter with enum trx_rbmode.
btr_free_externally_stored_field(): If field_ref is zero, return
but assert ut_a(rbmode == RB_RECOVERY). Unless InnoDB has crashed
while inserting a clustered index record, field_ref should not be zero.
btr_rec_free_updated_extern_fields(): Add the parameter enum trx_rbmode.
btr_cur_pessimistic_update(): Pass the rbmode parameter to
btr_rec_free_updated_extern_fields().
row_undo_ins(), row_undo_mod_upd_del_sec(): If row_build_index_entry()
fails, assert trx_is_recv() and skip this secondary index.
row_undo_mod_upd_del_sec(): Empty the heap at the end of each loop
iteration in order to conserve memory and to reduce the number of
low-level memory allocations.
symbols. Use it for all definitions of non-static variables and functions.
lexyy.c, make_flex.sh: Declare yylex as UNIV_INTERN, not static. It is
referenced from pars0grm.c.
Actually, according to
nm .libs/ha_innodb.so|grep -w '[ABCE-TVXYZ]'
the following symbols are still global:
* The vtable for class ha_innodb
* pars0grm.c: The function yyparse() and the variables yychar, yylval, yynerrs
The required changes to the Bison-generated file pars0grm.c will be addressed
in a separate commit, which will add a script similar to make_flex.sh.
The class ha_innodb is renamed from class ha_innobase by a #define. Thus,
there will be no clash with the builtin InnoDB. However, there will be some
overhead for invoking virtual methods of class ha_innodb. Ideas for making
the vtable hidden are welcome. -fvisibility=hidden is not available in GCC 3.
record is protected by a latch or a lock.
dtuple_copy(): New function: Copy a data tuple.
row_upd_replace(): New function: Apply on a row an update vector that
was built for the clustered index. Set up a cache of externally stored
column prefixes if needed.
undo_node_t: Add the fields undo_row, undo_ext.
row_undo_search_clust_to_pcur(): Initialize undo_row and undo_ext.
row_undo_mod_upd_exist_sec(): Instead of fetching prefixes of
externally stored columns, use the undo_row and undo_ext that were
initialized in row_undo_search_clust_to_pcur().
upd_node_t: Remove the field n_ext. Add the fields upd_row and upd_ext.
row_upd_store_row(): Initialize the upd_row and upd_ext fields of upd_node_t.
row_upd_sec_index_entry(), row_upd_clust_rec_by_insert(): Instead of
fetching prefixes of externally stored columns, use the upd_row
and upd_ext that were initialized in row_upd_store_row().
be protected from being deleted while any externally stored columns are
being fetched.
row_ext_create(),
row_upd_index_replace_new_col_vals(),
row_upd_index_replace_new_col_vals_index_pos(),
row_sel_sec_rec_is_for_blob(),
row_sel_sec_rec_is_for_clust_rec(): Note that the clustered
index record must be covered by a lock or a page latch.
row_upd_sec_index_entry(), row_upd_clust_rec_by_insert(),
row_undo_mod_upd_exist_sec(): Note that these functions probably
do not obtain an appropriate lock on the clustered index record
before fetching any externally stored columns.
inserted, uncommitted clustered index records when determining if a
secondary index record that contains a column prefix of an externally
stored column is referencing the clustered index record.
field_ref_zero[]: A BLOB pointer full of zero, for use in comparisons.
btr_copy_externally_stored_field_prefix(): Assert that the BLOB pointer is set.
row_ext_lookup_ith(), row_ext_lookup(), row_ext_lookup_low(): Document
that field_ref_zero is returned when the BLOB cannot be fetched.
row_ext_lookup_low(): Return field_ref_zero and *len = 0 when the
BLOB pointer is unset.
row_build_index_entry(): Return NULL when a needed BLOB pointer cannot
be dereferenced (row_ext_lookup returns field_ref_zero). Check the
return value for NULL in callers.
row_vers_impl_x_locked_off_kernel(): Avoid comparisons when
row_build_index_entry() returns NULL.
row_vers_old_has_index_entry(): Ignore records for which
row_build_index_entry() returns NULL. The entry should never be NULL
in rollback, but it may be NULL in purge.
row_merge_buf_add(): Assert that row_ext_lookup() does not return
field_ref_zero. The table will be locked during index creation.
column prefix of an externally stored column.
row_upd_ext_fetch(): New function.
row_upd_index_replace_new_col_vals(),
row_upd_index_replace_new_col_vals_index_pos(): Fetch prefixes of
externally stored columns when they are needed for column prefix
indexes. For memory allocation, add the parameter ext_heap. Avoid
repeating the inner loop after finding a matching upd_field->field_no.
in fast index creation. The prefix was previously TEMP_TABLE_PREFIX == '/',
which may occur in index names.
ut_print_namel(): Do not assume that all '/' are separators between
database and table names.
created in fast index creation.
dict_load_indexes(): Always complain if the first index is not clustered.
lock_table_enqueue_waiting(): Always complain about lock waits in
a dictionary operation.
row_merge_rename_tables(): Add an assertion that dict_sys->mutex is
being held.
row_undo_mod_del_unmark_sec_and_undo_update(): Make the test about
temporary indexes more readable.
row_create_table_for_mysql(): Do not retry creating a temporary table
in fast index creation. Orphaned temporary tables will have to be dropped
in crash recovery.
the insert buffer bitmap.
ibuf_set_free_bits_func(): Never disable redo logging.
ibuf_update_free_bits_zip(): Remove.
btr_page_reorganize_low(), page_zip_reorganize(): Do not update the insert
buffer bitmap. Instead, document that callers will have to take care of it,
and adapt the callers.
btr_compress(): On error, reset the insert buffer free bits.
btr_cur_insert_if_possible(): Do not modify the insert buffer bitmap.
btr_compress(), btr_cur_optimistic_insert(): On compressed pages,
reset the insert buffer bitmap. Document why.
btr_cur_update_alloc_zip(): Document why it is necessary and sufficient
to reset the insert buffer free bits.
btr_cur_update_in_place(), btr_cur_optimistic_update(),
btr_cur_pessimistic_update(): Update the free bits in the same
mini-transaction. Document that the mini-transaction must be
committed before latching any further pages. Verify that this
is the case in all execution paths.
row_ins_sec_index_entry_by_modify(), row_ins_clust_index_entry_by_modify(),
row_undo_mod_clust_low(): Because these functions call
btr_cur_update_in_place(), btr_cur_optimistic_update(), or
btr_cur_pessimistic_update(), document that the mini-transaction must be
committed before latching any further pages. Verify that this is the case
in all execution paths.
Previously, when big_rec was returned, the fields would point to
freed memory. The memory heap was allocated locally, and the data tuple
was allocated from the heap, and the big_rec would point to some fields
in the data tuple.
row_ins_clust_index_entry_by_modify(): Add parameter heap,
for the same reason.
in the clustered index to be smaller than the indexed prefix in secondary
indexes.
row_ext_lookup(): Return NULL if the column is not stored externally.
trx_undo_rec_get_partial_row(): row_build(): Add parameter row_ext_t** ext.
row_build_index_entry(): Add the parameter row_ext_t* ext.
Invoke row_ext_lookup() to fetch prefixes of externally stored columns.
upd_node_t, undo_node_t, purge_node_t: Add the field row_ext_t* ext.
BLOB pointers, trx_id, and roll_ptr.
btr_empty(), btr_create(), page_create(): Add parameter "index", as some
index information will be encoded on the compressed page.
Define REC_NODE_PTR_SIZE as 4.
Allow btr_page_reorganize() and btr_page_reorganize_low() to fail.
Define the error code DB_ZIP_OVERFLOW.
Make row_ins_index_entry_low() static.
page0zip: Encode the index, log reorganized records, and store uncompressed
fields separately from the compressed data stream.
