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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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33
sql/sql_show.cc
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@ -2047,6 +2047,22 @@ end_options:
append_directory(thd, packet, "INDEX", create_info.index_file_name);
}
static void append_period(THD *thd, String *packet, const LEX_CSTRING &start,
const LEX_CSTRING &end, const LEX_CSTRING &period,
bool ident)
{
packet->append(STRING_WITH_LEN(",\n PERIOD FOR "));
if (ident)
append_identifier(thd, packet, period.str, period.length);
else
packet->append(period);
packet->append(STRING_WITH_LEN(" ("));
append_identifier(thd, packet, start.str, start.length);
packet->append(STRING_WITH_LEN(", "));
append_identifier(thd, packet, end.str, end.length);
packet->append(STRING_WITH_LEN(")"));
}
/*
Build a CREATE TABLE statement for a table.
@ -2085,6 +2101,7 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
KEY *key_info;
TABLE *table= table_list->table;
TABLE_SHARE *share= table->s;
TABLE_SHARE::period_info_t &period= share->period;
sql_mode_t sql_mode= thd->variables.sql_mode;
bool explicit_fields= false;
bool foreign_db_mode= sql_mode & (MODE_POSTGRESQL | MODE_ORACLE |
@ -2364,11 +2381,8 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
DBUG_ASSERT(!explicit_fields || fe->invisible < INVISIBLE_SYSTEM);
if (explicit_fields)
{
packet->append(STRING_WITH_LEN(",\n PERIOD FOR SYSTEM_TIME ("));
append_identifier(thd,packet,fs->field_name.str, fs->field_name.length);
packet->append(STRING_WITH_LEN(", "));
append_identifier(thd,packet,fe->field_name.str, fe->field_name.length);
packet->append(STRING_WITH_LEN(")"));
append_period(thd, packet, fs->field_name, fe->field_name,
table->s->vers.name, false);
}
else
{
@ -2377,6 +2391,15 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
}
}
if (period.name)
{
append_period(thd, packet,
period.start_field(share)->field_name,
period.end_field(share)->field_name,
period.name, true);
}
/*
Get possible foreign key definitions stored in InnoDB and append them
to the CREATE TABLE statement