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MDEV-16386: Wrong result when pushdown into the HAVING clause of the

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materialized derived table/view that uses aliases is done

The problem appears when a column alias inside the materialized derived
table/view t1 definition coincides with the column name used in the
GROUP BY clause of t1. If the condition that can be pushed into t1
uses that ambiguous column name this column is determined as a column that
is used in the GROUP BY clause instead of the alias used in the projection
list of t1. That causes wrong result.
To prevent it resolve_ref_in_select_and_group() was changed.
This commit is contained in:
Galina Shalygina
2018-06-13 16:32:25 +02:00
parent a79b033b35
commit ec4fdd5749
6 changed files with 267 additions and 4 deletions
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5
sql/sql_lex.h
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@ -887,6 +887,11 @@ public:
bool braces; /* SELECT ... UNION (SELECT ... ) <- this braces */
/* TRUE when having fix field called in processing of this SELECT */
bool having_fix_field;
/*
TRUE when fix field is called for a new condition pushed into the
HAVING clause of this SELECT
*/
bool having_fix_field_for_pushed_cond;
/* List of references to fields referenced from inner selects */
List<Item_outer_ref> inner_refs_list;
/* Number of Item_sum-derived objects in this SELECT */