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531acda484
Make sure that SELECT_LEX_UNIT::derived, behaves as documented (points to the "TABLE_LIST representing this union in the embedding select"). For recursive CTE this was not necessarily the case, it could've pointed to the TABLE_LIST inside the CTE, not in the embedding select. To fix: * don't update unit->derived in mysql_derived_prepare(), pass derived as an argument to st_select_lex_unit::prepare() * prefer to set unit->derived in TABLE_LIST::init_derived() to the TABLE_LIST in the embedding select, not to the recursive reference. Fail if there are many TABLE_LISTs in the embedding select with conflicting FOR SYSTEM_TIME clauses. cleanup: * remove redundant THD* argument from st_select_lex_unit::prepare()
11 lines
404 B
Modula-2
11 lines
404 B
Modula-2
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