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e6a7457653
Many related changes. Note that AS OF condition must always be pushed down to physical tables, it cannot be applied to a derived or a view. Thus: * no versioning for internal temporary tables, they can never store historical data. * remove special versioning code from mysql_derived_prepare and remove ER_VERS_DERIVED_PROHIBITED - derived can have no historical data and cannot be prohibited for system versioning related reasons. * do not expand select list for derived/views with sys vers fields, derived/views can never have historical data. * remove special invisiblity rules for sys vers fields, they are no longer needed after the previous change * remove system_versioning_hide, it lost the meaning after the previous change. * remove ER_VERS_SYSTEM_TIME_CLASH, it's no "clash", the inner AS OF clause always wins. * non-versioned fields in a historical query reword the warning text, downgrade to note, don't replace values with NULLs
88 lines
2.9 KiB
Plaintext
88 lines
2.9 KiB
Plaintext
create table t (a int) with system versioning;
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insert into t values (1);
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update t set a= 2;
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show global variables like 'system_versioning_asof';
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show variables like 'system_versioning_asof';
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select * from t;
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set system_versioning_asof= '2031-1-1 0:0:0';
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show variables like 'system_versioning_asof';
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select * from t;
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set system_versioning_asof= '2011-1-1 0:0:0';
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show variables like 'system_versioning_asof';
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select * from t;
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# global
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--error ER_WRONG_VALUE_FOR_VAR
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set global system_versioning_asof= 'alley';
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--error ER_WRONG_VALUE_FOR_VAR
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set global system_versioning_asof= null;
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--error ER_WRONG_TYPE_FOR_VAR
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set global system_versioning_asof= 1;
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--error ER_WRONG_TYPE_FOR_VAR
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set global system_versioning_asof= 1.1;
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# session
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--error ER_WRONG_VALUE_FOR_VAR
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set system_versioning_asof= 'alley';
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--error ER_WRONG_VALUE_FOR_VAR
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set system_versioning_asof= null;
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--error ER_WRONG_TYPE_FOR_VAR
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set system_versioning_asof= 1;
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--error ER_WRONG_TYPE_FOR_VAR
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set system_versioning_asof= 1.1;
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--echo # GLOBAL @@system_versioning_asof
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set global system_versioning_asof= '1911-11-11 11:11:11.1111119';
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show global variables like 'system_versioning_asof';
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set global system_versioning_asof= '1900-01-01 00:00:00';
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show global variables like 'system_versioning_asof';
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set global system_versioning_asof= timestamp'1911-11-11 11:11:11.1111119';
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show global variables like 'system_versioning_asof';
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set @ts= timestamp'1900-01-01 00:00:00';
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set global system_versioning_asof= @ts;
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show global variables like 'system_versioning_asof';
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set global system_versioning_asof= default;
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select @@global.system_versioning_asof;
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--echo # SESSION @@system_versioning_asof
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set system_versioning_asof= '1911-11-11 11:11:11.1111119';
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show variables like 'system_versioning_asof';
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set system_versioning_asof= '1900-01-01 00:00:00';
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show variables like 'system_versioning_asof';
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set system_versioning_asof= timestamp'1911-11-11 11:11:11.1111119';
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show variables like 'system_versioning_asof';
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set @ts= timestamp'1900-01-01 00:00:00';
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set system_versioning_asof= @ts;
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show variables like 'system_versioning_asof';
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--echo # DEFAULT: value is copied from GLOBAL to SESSION
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set global system_versioning_asof= timestamp'1911-11-11 11:11:11.111111';
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set system_versioning_asof= '1900-01-01 00:00:00';
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select @@global.system_versioning_asof != @@system_versioning_asof as different;
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set system_versioning_asof= default;
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select @@global.system_versioning_asof = @@system_versioning_asof as equal;
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set global system_versioning_asof= DEFAULT;
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set system_versioning_asof= DEFAULT;
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select @@global.system_versioning_asof, @@system_versioning_asof;
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select * from t for system_time all;
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select * from t;
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select * from t for system_time as of timestamp current_timestamp(6);
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select * from t for system_time all;
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select * from t for system_time from '0-0-0' to current_timestamp(6);
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select * from t for system_time between '0-0-0' and current_timestamp(6);
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drop table t;
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