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MDEV-17082 Application-time periods: CREATE

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* add syntax `CREATE TABLE ... PERIOD FOR <apptime>`
* add table period entity
This commit is contained in:
Nikita Malyavin
2019-02-07 23:16:30 +10:00
committed by Sergei Golubchik
parent b63604612e
commit 073c93b194
18 changed files with 618 additions and 190 deletions
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4
sql/sql_table.cc
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@ -2998,7 +2998,8 @@ CHARSET_INFO* get_sql_field_charset(Column_definition *sql_field,
by adding the features DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP.
If the first TIMESTAMP column appears to be nullable, or to have an
explicit default, or to be a virtual column, then no promition is done.
explicit default, or to be a virtual column, or to be part of table period,
then no promotion is done.
@param column_definitions The list of column definitions, in the physical
order in which they appear in the table.
@ -3019,6 +3020,7 @@ void promote_first_timestamp_column(List<Create_field> *column_definitions)
column_definition->default_value == NULL && // no constant default,
column_definition->unireg_check == Field::NONE && // no function default
column_definition->vcol_info == NULL &&
column_definition->period == NULL &&
!(column_definition->flags & VERS_SYSTEM_FIELD)) // column isn't generated
{
DBUG_PRINT("info", ("First TIMESTAMP column '%s' was promoted to "