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13.1.20.1 CREATE TABLE Statement Retention
The original CREATE TABLE
statement, including all specifications and table options are
stored by MySQL when the table is created. The information is
retained so that if you change storage engines, collations or
other settings using an ALTER
TABLE statement, the original table options specified
are retained. This enables you to change between
InnoDB and
MyISAM table types even though the
row formats supported by the two engines are different.
Because the text of the original statement is retained, but due
to the way that certain values and options may be silently
reconfigured, the active table definition (accessible through
DESCRIBE or with
SHOW TABLE STATUS) and the table
creation string (accessible through SHOW
CREATE TABLE) may report different values.
For InnoDB tables, SHOW
CREATE TABLE and the Create_options
column reported by SHOW TABLE
STATUS show the actual ROW_FORMAT
and KEY_BLOCK_SIZE attributes used by the
table. In previous MySQL releases, the originally specified
values for these attributes were reported.
Document created the 26/06/2006, last modified the 26/10/2018
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