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A cleanup for MDEV-19908 Add class Type_collection

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If we have a mixture of:
- a MariaDB standard (built-in permanent) data type, and
- a non-standard (optionally compiled or pluggable) data type,
then ask the type collection of the non-standard type to aggregate the mixture.

If the non-standard collection fails, then continue aggregation
with Type_handler_data.
This commit is contained in:
Alexander Barkov
2019-10-03 10:26:46 +04:00
parent cefe5bb6b3
commit 54606df1a3
5 changed files with 66 additions and 49 deletions
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3
sql/sql_type.h
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@@ -3349,6 +3349,9 @@ public:
static const Type_handler *get_handler_by_field_type(enum_field_types type);
static const Type_handler *get_handler_by_real_type(enum_field_types type);
static const Type_handler *get_handler_by_cmp_type(Item_result type);
static const Type_collection *
type_collection_for_aggregation(const Type_handler *h1,
const Type_handler *h2);
virtual const Type_collection *type_collection() const;
static const
Type_handler *aggregate_for_result_traditional(const Type_handler *h1,