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02eda36e4e
This is backport of 25ad623d64 for 10.2.
The issue is similar to the one from MDEV-13240. Item::save_in_field()
returns an error during tmp table population in a create table from select query
as we try to save an empty string as a date value when
force_return_blank is set to true for window functions.
MDEV-13240 Wrong warning with MAX(datetime_field) OVER (...)
The problem resided in Item_window_func implementation,
and it was revealed by bb-10.2-ext specific changes:
Item_window_func::save_in_field() works differently in bb-10.2-ext vs 10.2:
- 10.2 goes through val_str()
- bb-10.2-ext goes through get_date(), due to Type_handler related changes.
get_date() tries to convert empty string to DATETIME, hence the warning.
During a discussion with Vicentiu, it was decided to fix
Item_window_func::val_xxx() to return NULL
(instead of an "empty" value, such as 0 for numbers and '' for strings)
when force_return_blank is set.
79 lines
1.9 KiB
Text
79 lines
1.9 KiB
Text
CREATE TABLE t1 (c1 INT, c2 VARCHAR(30));
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PREPARE populate_table FROM "INSERT into t1 values (1, 'manual_insert_1'),
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(4, 'manual_insert_2')";
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INSERT INTO t1 SELECT row_number() over(), "should_not_add_any_rows" FROM t1;
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INSERT INTO t1 SELECT 1 + row_number() over(), "should_not_add_any_rows" FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1 SELECT 10 + row_number() over(), "should repeat 2 times [11-12]" FROM t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1
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SELECT 10 + (dense_rank() over(order by c1)), "dense_rank_insert" from t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1
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SELECT 100 + (rank() over(order by c1)), "rank_insert" from t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1
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SELECT 100 + (ntile(10) over(order by c1)), "ntile_insert" from t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1
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SELECT 1000 + (percent_rank() over(order by c1)), "percent_rank_insert" from t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1
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SELECT 1000 + (count(*) over(order by c1)), "count_insert" from t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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--echo #
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--echo # Test how avg interacts when the results need to be rounded.
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--echo #
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SELECT 1000 + (avg(c1) over(order by c1)) as avg_expr, c1, "This will be inserted into t1" from t1;
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INSERT INTO t1
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SELECT 1000 + (avg(c1) over(order by c1)), "avg_insert" from t1;
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SELECT c1, c2 FROM t1 ORDER BY c2, c1;
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DELETE FROM t1;
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EXECUTE populate_table;
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INSERT INTO t1
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SELECT 1000 + (sum(c1) over(order by c1)), "sum_insert" from t1;
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SELECT c1, c2
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FROM t1
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ORDER BY c2, c1;
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DROP table t1;
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