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| author | Oleksandr Byelkin <sanja@mariadb.com> | 2018-11-20 10:58:34 +0100 |
|---|---|---|
| committer | Oleksandr Byelkin <sanja@mariadb.com> | 2018-11-27 14:33:39 +0100 |
| commit | 555921a9c3ddcd638e7f08ea117738640e300875 (patch) | |
| tree | e6cbc156d1fc1424f1d2356810e3a82604167199 /sql/item_sum.cc | |
| parent | a956260d826650f0a35779621c5987dc30f7ba04 (diff) | |
| download | mariadb-git-555921a9c3ddcd638e7f08ea117738640e300875.tar.gz | |
MDEV-15073: Generic UDAF parser code in server for windows functions
Added support for usual agreggate UDF (UDAF)
Added remove() call support for more efficient window function processing
Added example of aggregate UDF with efficient windows function support
Diffstat (limited to 'sql/item_sum.cc')
| -rw-r--r-- | sql/item_sum.cc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sql/item_sum.cc b/sql/item_sum.cc index 0e52b2988a3..b571289ca12 100644 --- a/sql/item_sum.cc +++ b/sql/item_sum.cc @@ -3235,6 +3235,25 @@ bool Item_udf_sum::add() DBUG_RETURN(0); } + +bool Item_udf_sum::supports_removal() const +{ + DBUG_ENTER("Item_udf_sum::supports_remove"); + DBUG_PRINT("info", ("support: %d", udf.supports_removal())); + DBUG_RETURN(udf.supports_removal()); +} + + +void Item_udf_sum::remove() +{ + my_bool tmp_null_value; + DBUG_ENTER("Item_udf_sum::remove"); + udf.remove(&tmp_null_value); + null_value= tmp_null_value; + DBUG_VOID_RETURN; +} + + void Item_udf_sum::cleanup() { /* |