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self-reference in system versioned table
First part of the fix (row0mysql.cc) addresses external columns when adding history
row on referential action. The full data must be retrieved before the
row is inserted.
Second part of the fix (the rest) avoids duplicate primary key error between
the history row generated on referential action and the history row
generated by SQL command. Both command and referential action can
happen on same table since foreign key can be self-reference (parent
and child tables are same). Moreover, the self-reference can refer
multiple rows when the key is non-unique. In such case history is
generated by referential action occured on first row but processed all
rows by a matched key. The second round is when the next row is
processed by a command but history already exists. In such case we
check TRX_ID of existing history row and if it is the same we assume
the above situation and skip adding one more history row or failing
the command.
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Preparation for MDEV-16210:
replace.test:
key_type combinations: PK and UNIQUE.
foreign.test:
Preparation for key_type combinations.
Other fixes:
* Merged versioning.update2 into versioning.update;
* Removed test2 database and done individual drop instead.
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* Removed "Not supported for TIMESTAMP-based" error
* Fixed code duplication with node->vers_set_fields()
* Recovered foreign.test
[closes tempesta-tech#473]
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Tests started to fail after a merge of MDEV-15107 (from bb-10.2-ext to 10.3),
because MDEV-15107 additionally fixed this problem:
MDEV-15112 Inconsistent evaluation of spvariable=0 in strict mode
Modifying tests not to reply on the pre-MDEV-15112 behavior.
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* Removed integer_fields check
* Reworked Vers_parse_info::check_sys_fields()
* Misc renames
* versioned as vers_sys_type_t
* Removed versioned_by_sql(), versioned_by_engine()
versioned() works as before;
versioned(VERS_TIMESTAMP) is versioned_by_sql();
versioned(VERS_TRX_ID) is versioned_by_engine().
* create_tmp_table() fix
* Foreign constraints for timestamp-based
* Range auto-specifier fix
* SQL: 1-row partition rotation fix [fixes #260]
* Fix 'drop system versioning, algorithm=inplace'
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SQL: fixed selecion of handlerton by respecting partitioning
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