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Merge 10.8 into 10.9
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@@ -4193,7 +4193,7 @@ JOIN::optimize_distinct()
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}
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/* Optimize "select distinct b from t1 order by key_part_1 limit #" */
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if (order && skip_sort_order)
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if (order && skip_sort_order && !unit->lim.is_with_ties())
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{
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/* Should already have been optimized away */
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DBUG_ASSERT(ordered_index_usage == ordered_index_order_by);
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@@ -30124,7 +30124,6 @@ void JOIN::make_notnull_conds_for_range_scans()
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{
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DBUG_ENTER("JOIN::make_notnull_conds_for_range_scans");
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if (impossible_where ||
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!optimizer_flag(thd, OPTIMIZER_SWITCH_NOT_NULL_RANGE_SCAN))
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{
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@@ -30204,7 +30203,6 @@ bool build_notnull_conds_for_range_scans(JOIN *join, Item *cond,
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table_map allowed)
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{
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THD *thd= join->thd;
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DBUG_ENTER("build_notnull_conds_for_range_scans");
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for (JOIN_TAB *s= join->join_tab;
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@@ -30212,13 +30210,13 @@ bool build_notnull_conds_for_range_scans(JOIN *join, Item *cond,
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{
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/* Clear all needed bitmaps to mark found fields */
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if ((allowed & s->table->map) &&
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!(s->table->map && join->const_table_map))
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!(s->table->map & join->const_table_map))
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bitmap_clear_all(&s->table->tmp_set);
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}
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/*
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Find all null-rejected fields assuming that cond is null-rejected and
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only formulas over tables from 'allowed' are to be taken into account
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only formulas over tables from 'allowed' are to be taken into account
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*/
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if (cond->find_not_null_fields(allowed))
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DBUG_RETURN(true);
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