mariadb

Tree: 602e15a0cb

Author	SHA1	Message	Date
Igor Babaev	602e15a0cb	Changed the base class for Item_window_func from Item_result_field to Item_func_or_sum. Implemented method update_used_tables for class Item_findow_func. Added the flag Item::with_window_func. Made sure that window functions could be used only in SELECT list and ORDER BY clause. Added test cases that checked different illegal placements of window functions.	10 years ago
Igor Babaev	a74e8d36dd	For some window functions an order list must be present.	10 years ago
Sergei Petrunia	13f9535f2d	MDEV-9724: Window functions: Frame Exclusion support Produce a "not supported" error if one attempts to exclude rows	10 years ago
Igor Babaev	a197c6bb68	Prohibit using window functions of some types with window frames in full accordance with the SQL standard.	10 years ago
Igor Babaev	761590dcd5	Merge branch 'bb-10.2-mdev9543' of github.com:MariaDB/server into bb-10.2-mdev9543	10 years ago
Igor Babaev	84c3a20ff9	Fixed bug mdev-9754. Each window name has to be resolved only once.	10 years ago
Sergei Petrunia	c5537c042a	MDEV-9755: Buildbot shows a crash in JOIN::make_aggr_tables_info() Don't attempt to do query pushdown when all tables have been optimized away (tables_list=NULL)>	10 years ago
Sergei Petrunia	6533bd1b74	Window functions + ORDER BY : first testcase	10 years ago
Sergei Petrunia	b0154190fb	Remove the wrong check, win_spec->order_list may be empty but it is not NULL.	10 years ago
Sergei Petrunia	ee9297f656	MDEV-9740: Window functions: catch invalid window frame specs Catch errors in window frame definitions	10 years ago
Igor Babaev	c3ab9712b0	Fixed the bug mdev-9719 concerning execution of prepared statements with window functions. Added the test case for it. Also allowed to use aliases for set functions in partition and order lists that are specified in window functions.	10 years ago
Sergei Petrunia	72a4969eca	Add testcases for frames with bound1 > bound2.	10 years ago
Igor Babaev	5eee8bbe87	The class Window_spec now has pointers to the partition and order lists of the type SQL_I_List<ORDER> rather then the objects of this type. It allows to replace easily one instance of such a list for another. Besides it will facilitate to compare two lists if they originate from the same window specification. In fact any direct assignment for objects of the type SQL_I_List<ORDER> was not valid.	10 years ago
Vicențiu Ciorbaru	21651541ce	Implemented avg() window function. It is based on the sum() function, thus much of the logic is shared. Considering that there are 2 counters stored within the function, one that handles the null value, while the other that handles the divisor for the avg computation, it is possible to remove the counter from the Item_sum_avg. I have not removed it in this patch as we may choose to refactor the whole code into a separate class. This remains to be dicussed.	10 years ago
Vicențiu Ciorbaru	aa74fef25e	Fix 2 more bugs in item_windowfunc. 1. Item_windowfunc must check the nullness of the field if it returns the value from the result_field. 2. The decimal value must come from the window_func instead of the result_field when not fetching values from the result_field. Added a more extensive test case that highlights if these bugs occur. The 2 select statements check behaviour for decimal and real typed fields respectively.	10 years ago
Vicențiu Ciorbaru	350903e952	Remove no longer needed TODO.	10 years ago
Vicențiu Ciorbaru	333ac13be5	Make sure to return the result value when calling Item_windowfunc::val_real() This caused Item_windowfunc to return garbage.	10 years ago
Sergei Petrunia	833304313d	Continuation of "Implemented a counter within Item_sum_sum" a few commits before Query result had 0 where it should have had NULLs: - Make Item_window_func::val* functions honor NULL-handling conventions: 1. set null_value to indicate whether we've returned a NULL value 2. val_str and val_decimal should return NULL pointer when they're returning SQL NULL value. Fix assertion failure when sending results to network. - The assert was due to window func returing SQL NULL despite having maybe_null=false - Fixed by settting Item_window_func::maybe_null correctly in fix_fields	10 years ago
Sergei Petrunia	21a0291c1d	MDEV-8646: Re-engineer the code for post-join operations Make query pushdown work in the post-refactored code. This fixes sequence.group_by test.	10 years ago
Vicențiu Ciorbaru	93f2371020	Implemented a counter within Item_sum_sum The counter keeps track of the number of items added to the sum function. It is increased when we add a value to the sum function and decreased when it is removed.	10 years ago
Sergei Petrunia	e261c14456	Add a testcase for RANGE-type frames and NULL values	10 years ago
Vicențiu Ciorbaru	a0c06ba1ed	Preliminary implementation for the aggregate sum function as a window function This implementation does not deal with the case where removal of elements from the window frame causes the item to turn to a null value.	10 years ago
Sergei Petrunia	ce8a0d8e19	MDEV-9676: RANGE-type frames for window functions - Handle ORDER BY DESC in window definitions. - Fix an issue in Frame_range_current_row_top	10 years ago
Sergei Petrunia	b8d8d9b8cc	Add a testcase for non-integer range frame.	10 years ago
Sergei Petrunia	e859c2dbb8	MDEV-9676: RANGE-type frames for window functions Add support for "RANGE n PRECEDING\|FOLLOWING" frame bounds. - n is currently limited to whatever Item and Item_sum_plus/minus can handle (i.e. no DATETIME intervals). - Didn't check NULL value handling yet.	10 years ago
Sergei Petrunia	879731aa84	Better comments	10 years ago
Sergei Petrunia	1cb5c2c0e0	Use correct frame bounds when window frame was not specified Also added win_bit.result (result values checked)	10 years ago
Sergei Petrunia	53784d9abc	MDEV-9695: Wrong window frame when using RANGE BETWEEN N FOLLOWING AND PRECEDING Part#2: Fix a couple more issues in rows-type frames. This also has a code cleanup: - introduce a separate Frame_rows_current_row_(top,bottom). This is is a special case which doesn't need its cursor or partition bound check - Split Frame_n_rows into = Frame_n_rows_preceding (this one is now much simpler) = Frame_n_rows_following (simpler and works but may need some work still)	10 years ago
Sergei Petrunia	0e9fb982f1	MDEV-9695: Wrong window frame when using RANGE BETWEEN N FOLLOWING AND PRECEDING Part#1: Frame_n_rows::next_partition() should not assume that the current table->record[0] points to the first row in the partition. Since cursor supports move_to() operation, we dont need this.	10 years ago
Vicențiu Ciorbaru	89383812b0	Add temporary test cases for bitwise window functions. The results for this test case are blocked by MDEV-9695.	10 years ago
Vicențiu Ciorbaru	42ededf4ad	Create a default frame bound when no frame is specified.	10 years ago
Vicențiu Ciorbaru	974e65d368	Implement BIT_(AND\|OR\|XOR) functions as window functions.	10 years ago
Sergei Petrunia	02b7d13730	MDEV-9676: RANGE-type frames for window functions Add testcases for RANGE UNBOUNDED PRECEDING\|FOLLOWING	10 years ago
Sergei Petrunia	1fa12cdfb7	MDEV-9676: RANGE-type frames for window functions Support RANGE ... CURRENT ROW as frame's first and second bound.	10 years ago
Vicențiu Ciorbaru	b579a626cf	Implement percent_rank window function	10 years ago
Vicențiu Ciorbaru	f638ffef2c	Convert if statements to switch case.	10 years ago
Sergei Petrunia	1cc6fd1f00	Remove comments that may be confusing	10 years ago
Sergei Petrunia	86acf267fe	Remove all comments starting with 'psergey'	10 years ago
Sergei Petrunia	dedf87fdf4	Rename window frame start/end to top/bottom. Bikeshed should be green.	10 years ago
Sergei Petrunia	7ee0140149	MDEV-9526: Compute Aggregate functions as window functions Introduce explicitly-defined cursors. - Rowid_seq_cursor just reads the rowid sequence - Table_read_cursor also reads rows for the rowids - Also, we need a kind of cursor that stops at partition boundary?	10 years ago
Sergei Petrunia	4104408c0c	Re-factoring in window cursors code split Frame_unbounded ... into Frame_unbounded_preceding and Frame_unbounded_following	10 years ago
Sergei Petrunia	d290a66553	MDEV-9634: Window function produces incorrect value - Item_sum_count::remove() should check if the argument's value is NULL. - Window Function item must have its Item_window_func::split_sum_func called, - and it must call split_sum_func for aggregate's arguments (see the comment near Item_window_func::split_sum_func for explanation why)	10 years ago
Igor Babaev	0c6d753708	Fixed a problems in the parser. Resolved window names. Checked some constraints for window frames. Added test cases for window name resolution.	10 years ago
Sergei Petrunia	be15858245	MDEV-9526: Compute Aggregate functions as window functions - Add temporary code: clone_read_record() clones READ_RECORD structure, as long as it is used for reading filesort() result that fits into memory. - Add frame bounds for ROWS-type frames. ROWS n PRECEDING\|FOLLOWING, ROWS UNBOUNDED PRECEDING\|FOLLOWING, CURRENT ROW are supported. - Add Item_sum_count::remove() which allows "streaming" computation of COUNT() over a moving frame.	10 years ago
Vicențiu Ciorbaru	0c223a96c1	Fix review comments.	10 years ago
Vicențiu Ciorbaru	9a673e0a88	Implement DENSE_RANK function.	10 years ago
Sergei Petrunia	c30119adc7	Testcase fix and code cleanup for window functions - Make queries that use multiple window functions not to leak memory - Code cleanup in sql_window.cc	10 years ago
Sergei Petrunia	687a51f8b5	Forgot to add sql_select.cc to the previous commit	10 years ago
Sergei Petrunia	970307f54a	Cleanup: remove JOIN::table_access_tabs, top_table_access_tabs_count. These do not have any meaning after MDEV-8646. Their only valid values are - table_access_tabs= join_tab; - top_table_access_tabs_count= top_join_tab_count;	10 years ago
Sergei Petrunia	d8a20d4db7	Post-merge fixes. win.test passes but further cleanup is needed.	10 years ago

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