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  1. MariaDB Server
  2. MDEV-33805

Crash after pushing down condition with DEFAULT to derived table

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Duplicate
    • 10.5
    • 10.5.27
    • Optimizer
    • None

    Description

      CREATE TABLE t1 (c1 INT);
      		 
      INSERT INTO t1 VALUES (1);
      		 
      CREATE TABLE t2 (c2 INT);
      		 
      INSERT INTO t2 VALUES (1);
      		 
       
      		 
      SET optimizer_switch='derived_merge=off';
      		 
       
      		 
      EXPLAIN EXTENDED
      		 
           SELECT dt1_c1 FROM 
             (SELECT c1 AS dt1_c1 FROM t1) AS dt1
      		 
             JOIN 
             (SELECT 1 AS dt2_c2 FROM t2) AS dt2
      		 
                ON DEFAULT(dt2_c2) BETWEEN dt1_c1 AND dt1_c1;

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. MDEV-31007 Assertion `item->type() == Item::FIELD_ITEM || (item->type() == Item::REF_ITEM && ((Item_ref *) item)->ref_type() == Item_ref::VIEW_REF)' failed in find_producing_item

          • Major - Major loss of function.
          • Confirmed

          Activity

            Ascending order - Click to sort in descending order
            oleg.smirnov Oleg Smirnov added a comment -

            alice, I'm not sure: the call stacks are not identical (there is Item_str_func::fix_fields at MDEV-25012), and the queries look different. Let's just link the tasks

            oleg.smirnov Oleg Smirnov added a comment - alice , I'm not sure: the call stacks are not identical (there is Item_str_func::fix_fields at MDEV-25012 ), and the queries look different. Let's just link the tasks
            psergei Sergei Petrunia added a comment -

            Note:
            There is at least one odd thing happening here that wasn't happening in MDEV-33010: In pushdown_cond_for_derived() I see this:

            (gdb) p dbug_print_item(cond)
            		 
              $44 = 0x5555577f6de0 <dbug_item_print_buf> "default(dt2.dt2_c2) between dt1.dt1_c1 and dt1.dt1_c1"
            		 
            (gdb) p dbug_print_item(extracted_cond)
            		 
              $45 = 0x5555577f6de0 <dbug_item_print_buf> "dt2.dt2_c2 between dt1.dt1_c1 and dt1.dt1_c1"

            The "Extraction" of pushable condition turned default(dt2.dt2_c2) into just dt2.dt2_c2.

            psergei Sergei Petrunia added a comment - Note: There is at least one odd thing happening here that wasn't happening in MDEV-33010 : In pushdown_cond_for_derived() I see this: (gdb) p dbug_print_item(cond) $44 = 0x5555577f6de0 <dbug_item_print_buf> "default(dt2.dt2_c2) between dt1.dt1_c1 and dt1.dt1_c1" (gdb) p dbug_print_item(extracted_cond) $45 = 0x5555577f6de0 <dbug_item_print_buf> "dt2.dt2_c2 between dt1.dt1_c1 and dt1.dt1_c1" The "Extraction" of pushable condition turned default(dt2.dt2_c2) into just dt2.dt2_c2 .
            oleg.smirnov Oleg Smirnov added a comment -

            Seems to be a duplicate of MDEV-31007, MDEV-34695.

            oleg.smirnov Oleg Smirnov added a comment - Seems to be a duplicate of MDEV-31007 , MDEV-34695 .

            People

              oleg.smirnov Oleg Smirnov
              oleg.smirnov Oleg Smirnov
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              Dates

                Created:
                Updated:
                Resolved:

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