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MDEV-25380: JSON_TABLE: Assertion `join->best_read < double(1.797...) fails
The query used a subquery of this form: SELECT ... WHERE EXISTS( SELECT ... FROM JSON_TABLE(outer_ref, ..) as JT WHERE trivial_correlation_cond) EXISTS-to-IN conversion code was unable to see that the subquery will still be correlated after the trivial_correlation is removed, which eventually caused a crash due to inability to construct a query plan. Fixed by making Item_subselect::walk() also walk arguments of Table Functions.
This commit is contained in:
committed by
Alexey Botchkov
parent
eb2550ee78
commit
4a10dd0253
@ -200,6 +200,9 @@ public:
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/*** Name resolution functions ***/
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int setup(THD *thd, TABLE_LIST *sql_table, SELECT_LEX *s_lex);
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int walk_items(Item_processor processor, bool walk_subquery,
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void *argument);
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/*** Functions for interaction with the Query Optimizer ***/
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void fix_after_pullout(TABLE_LIST *sql_table,
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st_select_lex *new_parent, bool merge);
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