| Commit message (Collapse) | Author | Age | Files | Lines |
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DECIMAL(M,D) column
The code in Item_func_int_val::fix_length_and_dec_int_or_decimal()
calculated badly the result data type for FLOOR()/CEIL(), so for example
the decimal(38,10) input created a decimal(28,0) result.
That was not correct, because one extra integer digit is needed.
floor(-9.9) -> -10
ceil(9.9) -> 10
Rewritting the code in a more straightforward way.
Additional changes:
- FLOOR() now takes into account the presence of the UNSIGNED
flag of the argument: FLOOR(unsigned decimal) does not need an extra digits.
- FLOOR()/CEILING() now preserve the unsigned flag in the result
data type is decimal.
These changes give nicer data types.
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- multi_range_read_info_const now uses the new records_in_range interface
- Added handler::avg_io_cost()
- Don't calculate avg_io_cost() in get_sweep_read_cost if avg_io_cost is
not 1.0. In this case we trust the avg_io_cost() from the handler.
- Changed test_quick_select to use TIME_FOR_COMPARE instead of
TIME_FOR_COMPARE_IDX to align this with the rest of the code.
- Fixed bug when using test_if_cheaper_ordering where we didn't use
keyread if index was changed
- Fixed a bug where we didn't use index only read when using order-by-index
- Added keyread_time() to HEAP.
The default keyread_time() was optimized for blocks and not suitable for
HEAP. The effect was the HEAP prefered table scans over ranges for btree
indexes.
- Fixed get_sweep_read_cost() for HEAP tables
- Ensure that range and ref have same cost for simple ranges
Added a small cost (MULTI_RANGE_READ_SETUP_COST) to ranges to ensure
we favior ref for range for simple queries.
- Fixed that matching_candidates_in_table() uses same number of records
as the rest of the optimizer
- Added avg_io_cost() to JT_EQ_REF cost. This helps calculate the cost for
HEAP and temporary tables better. A few tests changed because of this.
- heap::read_time() and heap::keyread_time() adjusted to not add +1.
This was to ensure that handler::keyread_time() doesn't give
higher cost for heap tables than for normal tables. One effect of
this is that heap and derived tables stored in heap will prefer
key access as this is now regarded as cheap.
- Changed cost for index read in sql_select.cc to match
multi_range_read_info_const(). All index cost calculation is now
done trough one function.
- 'ref' will now use quick_cost for keys if it exists. This is done
so that for '=' ranges, 'ref' is prefered over 'range'.
- scan_time() now takes avg_io_costs() into account
- get_delayed_table_estimates() uses block_size and avg_io_cost()
- Removed default argument to test_if_order_by_key(); simplifies code
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Remove usage of deprecated variable storage_engine. It was deprecated in 5.5 but
it never issued a deprecation warning. Make it issue a warning in 10.5.1.
Replaced with default_storage_engine.
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This patch contains a full implementation of the optimization
that allows to use in-memory rowid / primary filters built for range
conditions over indexes. In many cases usage of such filters reduce
the number of disk seeks spent for fetching table rows.
In this implementation the choice of what possible filter to be applied
(if any) is made purely on cost-based considerations.
This implementation re-achitectured the partial implementation of
the feature pushed by Galina Shalygina in the commit
8d5a11122c32f4d9eb87536886c6e893377bdd07.
Besides this patch contains a better implementation of the generic
handler function handler::multi_range_read_info_const() that
takes into account gaps between ranges when calculating the cost of
range index scans. It also contains some corrections of the
implementation of the handler function records_in_range() for MyISAM.
This patch supports the feature for InnoDB and MyISAM.
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- Adding a helper class Sec6 to store (neg,seconds,microseconds)
- Adding a helper class VSec6 (Sec6 with a flag for "IS NULL")
- Wrapping related functions as methods of Sec6;
* number_to_datetime()
* number_to_time()
* my_decimal2seconds()
* Item::get_seconds()
* A big piece of code in Item_func_sec_to_time::get_date()
- Using the new classes in places where second-to-temporal
conversion takes place:
* Field_timestamp::store(double)
* Field_timestamp::store(longlong)
* Field_timestamp_with_dec::store_decimal(my_decimal)
* Field_temporal_with_date::store(double)
* Field_temporal_with_date::store(longlong)
* Field_time::store(double)
* Field_time::store(longlong)
* Field_time::store_decimal(my_decimal)
* Field_temporal_with_date::store_decimal(my_decimal)
* get_interval_value()
* Item_func_sec_to_time::get_date()
* Item_func_from_unixtime::get_date()
* Item_func_maketime::get_date()
This change simplifies these methods and functions a lot.
- Warnings are now sent at VSec6 initialization time, when the source
data is available in its original data type representation.
If Sec6::to_time() or Sec6::to_datetime() truncate data again during
conversion to MYSQL_TIME, they send warnings, but only if no warnings
were sent during VSec6 initialization. This helps prevents double warnings.
The call for val_str() in Item_func_sec_to_time::get_date() is not
needed any more, so it's removed. This change actually fixes the problem.
As a good effect, FROM_UNIXTIME() and MAKETIME() now also send warnings
in case if the seconds arguments is out of range. Previously these
functions returned NULL silently.
- Splitting the code in the global function make_truncated_value_warning()
into a number of methods THD::raise_warning_xxxx().
This was needed to reuse the logic that chooses between:
* ER_TRUNCATED_WRONG_VALUE
* ER_WRONG_VALUE
* ER_TRUNCATED_WRONG_VALUE_FOR_FIELD
for non-temporal data types (Sec6).
- Removing:
* Item::get_seconds()
* number_to_time_with_warn()
as this code now resides inside methods of Sec6.
- Cleanup (changes that are not directly related to the fix):
* Removing calls for field_name_or_null() and passing NULL instead
in Item_func_hybrid_field_type::get_date_from_{int|real}_op,
because Item_func_hybrid_field_type::field_name_or_null()
always returns NULL
* Replacing a number of calls for make_truncated_value_warning()
to calls for THD::raise_warning_xxx(). In these places
we know that the execution went through a certain
branch of make_truncated_value_warning(),
(e.g. the exact error code is known, or field name is always NULL,
or field name is always not-NULL). So calls for the entire
make_truncated_value_warning() after splitting are not necessary.
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Added --skip-test-db option to mysql_install_db. If specified, no test
database created and relevant grants issued.
Removed --skip-auth-anonymous-user option of mysql_install_db. Now it is
covered by --skip-test-db.
Dropped some Debian patches that did the same.
Removed unused make_win_bin_dist.1, make_win_bin_dist and
mysql_install_db.pl.in.
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