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Rechercher dans le manuel MySQL
23.2.3 COLUMNS Partitioning
The next two sections discuss
COLUMNS
partitioning, which are variants on
RANGE and LIST
partitioning. COLUMNS partitioning enables
the use of multiple columns in partitioning keys. All of these
columns are taken into account both for the purpose of placing
rows in partitions and for the determination of which partitions
are to be checked for matching rows in partition pruning.
In addition, both RANGE COLUMNS partitioning
and LIST COLUMNS partitioning support the use
of non-integer columns for defining value ranges or list
members. The permitted data types are shown in the following
list:
All integer types:
TINYINT,SMALLINT,MEDIUMINT,INT(INTEGER), andBIGINT. (This is the same as with partitioning byRANGEandLIST.)Other numeric data types (such as
DECIMALorFLOAT) are not supported as partitioning columns.Columns using other data types relating to dates or times are not supported as partitioning columns.
The following string types:
CHAR,VARCHAR,BINARY, andVARBINARY.TEXTandBLOBcolumns are not supported as partitioning columns.
The discussions of RANGE COLUMNS and
LIST COLUMNS partitioning in the next two
sections assume that you are already familiar with partitioning
based on ranges and lists as supported in MySQL 5.1 and later;
for more information about these, see
Section 23.2.1, “RANGE Partitioning”, and
Section 23.2.2, “LIST Partitioning”, respectively.
Document created the 26/06/2006, last modified the 26/10/2018
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