Line loops weren't recognized when collect results.
    Fixed by checking if we got the same beginning point of the line.

per-file comments:
  mysql-test/r/gis-precise.result
bug 839341 100% CPU usage with ST_UNION in maria-5.3-gis.
      test result updated.
  mysql-test/t/gis-precise.test
bug 839341 100% CPU usage with ST_UNION in maria-5.3-gis.
      test case added.
  sql/gcalc_tools.cc
bug 839341 100% CPU usage with ST_UNION in maria-5.3-gis.
      check if we get the beginning node of the linestring, then cut the loop.

    We didn't implement an empty geometry. And returning NULL instead of it is not
    quite correct. So here is the implementation of the empty value as GEOMETRYCOLLECTION().

per-file comments:
  mysql-test/r/gis-precise.result
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    test result updated.

  mysql-test/r/gis.result
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    test result updated.

  mysql-test/t/gis-precise.test
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    test case added.

  mysql-test/t/gis.test
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    test case added.

  sql/field.cc
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    store GEOMETRYCOLLECTION() properly.

  sql/gcalc_tools.cc
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    create the GEOMETRYCOLLECTION() for the empty result.

  sql/gstream.h
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    next_symbol() added.

  sql/spatial.cc
bug 801466 ST_INTERSECTION() returns invalid value on empty intersection in maria-5.3-gis.
    code modified to handle 0 geometries in the GEOMETRYCOLLECTION properly.

tests added.

per-file comments:
  mysql-test/r/gis-precise.result
bugs #801560 and #802194
        test result updated.

  mysql-test/t/gis-precise.test
bugs #801560 and #802194
        test case added.

        Second smaller hole in the polygon got link to the bigger one as it's the
        outer ring. Fixed by specifying the outer ring explicitly.


per-file comments:
  mysql-test/r/gis-precise.result
Fix for bug #804266 Memory corruption/valgrind warning/crash in move_hole() with ST_UNION.
        test result updated.

  mysql-test/t/gis-precise.test
Fix for bug #804266 Memory corruption/valgrind warning/crash in move_hole() with ST_UNION.
        test case added.

  sql/gcalc_tools.cc
Fix for bug #804266 Memory corruption/valgrind warning/crash in move_hole() with ST_UNION.
        specify the outer ring explicitly in the get_polygon_result parameter.

  sql/gcalc_tools.h
Fix for bug #804266 Memory corruption/valgrind warning/crash in move_hole() with ST_UNION.
        add the outer ring as a parameter to the get_polygon_result.

        We cannot cut a line from a polygon. So if the polygon fits the condition, and
        the intersection of a line and the polygon doesn't, we just skip the line.
        That rule wasn't applied if the line start was inside the polygon, which leaded
        to the assertion.

per-file comments:
  mysql-test/r/gis-precise.result
Fix for bug #801217 Assertion `t1->result_range' in Gcalc_operation_reducer::end_couple.
        test result updated.
  mysql-test/t/gis-precise.test
Fix for bug #801217 Assertion `t1->result_range' in Gcalc_operation_reducer::end_couple.
        test case added.
  sql/gcalc_tools.cc
Fix for bug #801217 Assertion `t1->result_range' in Gcalc_operation_reducer::end_couple.
        Don't mark the line as a border if it's inside a polygon that fits the result condition.

        A polygon has no right to have holes that are actually points.
        So just skip them when we collect the result of an operation.

per-file comments:
  mysql-test/r/gis-precise.result
Fix for bug #804259 Second assertion in Gis_geometry_collection::init_from_opresult.
        test result updated.
  mysql-test/t/gis-precise.test
Fix for bug #804259 Second assertion in Gis_geometry_collection::init_from_opresult.
        test case added.
  sql/gcalc_tools.cc
Fix for bug #804259 Second assertion in Gis_geometry_collection::init_from_opresult.
        Skip the point in the result if it's the hole inside a polygon.

Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        Just typo-style mistake. Should be '||' instead of '&&'.

per-file comments:
  mysql-test/r/gis-precise.result
Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        test result updated.
  mysql-test/t/gis-precise.test
Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        test case added.
  sql/item_geofunc.cc
Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        condition fixed.

        There were actually two bugs. One was when the line that intersects itself
        the intersection point treated as it doesn't belong to the line.
        Second when edges partly coincide, wrong result produced when we try to find their
        intersection.


per-file comments:
  mysql-test/r/gis-precise.result
Fix for bug #804324 Assertion 0 in Gcalc_scan_iterator::pop_suitable_intersection
        test result updated.

  mysql-test/t/gis-precise.test
Fix for bug #804324 Assertion 0 in Gcalc_scan_iterator::pop_suitable_intersection
        test case added.

  sql/gcalc_slicescan.cc
Fix for bug #804324 Assertion 0 in Gcalc_scan_iterator::pop_suitable_intersection
        skip the intersection if it just line that intersects itself.

  sql/gcalc_tools.cc
Fix for bug #804324 Assertion 0 in Gcalc_scan_iterator::pop_suitable_intersection
        if edges coincide, just pick the first coinciding poing as an intersection.

        That crash happened with the complicated topology of the result.
        If we found a hole in a polygon whose outside border was already
        found, we need to paste the hole right after it and respectively
        shift polygons after it. Also we need to update poly_position fields
        in these polygons. That last thing wasn't properly done that led to the
        crash.
        To fix that we keep the list of the found polygons and update the
        poly_positions that are bigger or equal to where we placed the next hole.


per-file comments:
  mysql-test/r/gis-precise.result
bug #804305 Crash in wkb_get_double with ST_INTERSECTION.
        test result updated.
  mysql-test/t/gis-precise.test
bug #804305 Crash in wkb_get_double with ST_INTERSECTION.
        test result added.
  sql/gcalc_tools.cc
bug #804305 Crash in wkb_get_double with ST_INTERSECTION.
        keep the list of the found polygons and update their poly_position fields respectively.
  sql/gcalc_tools.h
bug #804305 Crash in wkb_get_double with ST_INTERSECTION.
        Gcalc_result_receiver::move_hole interface changed.

        The ::val_str() method has to return NULL if it calculated
        the null_value, not just set the related flag.

per-file comments:
  mysql-test/r/gis-precise.result
fix for bug #801212 Assertion with ST_INTERSECTION on NULL values
        test result updated.
  mysql-test/t/gis-precise.test
fix for bug #801212 Assertion with ST_INTERSECTION on NULL values
        test case added.
  sql/item_geofunc.cc
fix for bug #801212 Assertion with ST_INTERSECTION on NULL values
        return NULL from the val_str if we get the null_value.

        Collections were treated mistakenly, so the counter for the final UNION operation
        received the wrong value.
        As a fix we implement Item_func_buffer::Transporter::start_collection() method,
        where we set the proper operation and the operand counter.
        start_poly() and start_line() were also modified to function correctly for the 
        polygon as a part of a collection.

per-file comments:
  mysql-test/r/gis-precise.result
bug #801199 Infinite recursion in Gcalc_function::count_internal with ST_BUFFER over MULTIPOINT
        test result updated.

  mysql-test/t/gis-precise.test
bug #801199 Infinite recursion in Gcalc_function::count_internal with ST_BUFFER over MULTIPOINT
        test case added.

  sql/item_geofunc.cc
bug #801199 Infinite recursion in Gcalc_function::count_internal with ST_BUFFER over MULTIPOINT
        start_collection() implemented.

  sql/item_geofunc.h
bug #801199 Infinite recursion in Gcalc_function::count_internal with ST_BUFFER over MULTIPOINT
        Item_func_buffer::Transporter::start_collection() defined.

        Internal caclucations can't handle zero distance properly.
        As the ST_BUFFER(geom, 0) is in fact NOOP, we'll just return the
        'geom' as the result here.

per-file comments:
  mysql-test/r/gis-precise.result
fix for bug #201189 ST_BUFFER asserts if radius = 0.
        test result updated.

  mysql-test/t/gis-precise.test
fix for bug #201189 ST_BUFFER asserts if radius = 0.
        test case added.

  sql/item_geofunc.cc
fix for bug #201189 ST_BUFFER asserts if radius = 0.
        return the first argument as the result of the ST_BUFFER, if
        the distance is 0 there.

fix for bug #801243 Assertion `(0)' failed in Gis_geometry_collection::init_from_opresult on ST_UNION 
        If the result contains a polygon with a hole, consequitive shapes weren't calculated
        properly, as the hole appeared as shape in the result, but actually it's a single shape
        with the surrounding polygon. It's more natural to use the size of the result as
        a border instead of the number of resulting shapes.

per-file comments:
  mysql-test/r/gis-precise.result
fix for bug #801243 Assertion `(0)' failed in Gis_geometry_collection::init_from_opresult on ST_UNION 
        test result updated.
  mysql-test/t/gis-precise.test
fix for bug #801243 Assertion `(0)' failed in Gis_geometry_collection::init_from_opresult on ST_UNION 
        test case added.
  sql/spatial.cc
fix for bug #801243 Assertion `(0)' failed in Gis_geometry_collection::init_from_opresult on ST_UNION 
        check the data lenght instead of number of shapes.
  sql/spatial.h
fix for bug #801243 Assertion `(0)' failed in Gis_geometry_collection::init_from_opresult on ST_UNION 
        check the data lenght instead of number of shapes.

merging.

-In  do_sj_dups_weedout(), set nulls_ptr to point to NULL bytes (and not to length bytes) of the DuplicateWeedout column.

- Testcase

BUG#761598: InnoDB: Error: row_search_for_mysql() is called without ha_innobase::external_lock() in maria-5.3
- Testcase

- Add testcase

The previous patch partially fixed things by waiting for the old dump thread
on the master to exit before injecting the DBUG error. This prevents the error
injection going to the wrong thread.

However, there is still the problem that the old dump thread may never exit,
causing the wait to time out. This happens if the dump thread manages to write
all events down the socket before the socket is closed by the slave. The
master dump thread only checks for slave gone when writing a new event, so if
no new events are generated, old dump threads can hang around forever on the
master after the slave disconnects.

Fix by explicitly killing the old dump thread if it is still around.

(Changeset sp1r-igor@olga.mysql.com-20070526173301-38848 moved this loop from one place 
to another, then the merge of sp1r-gshchepa/uchum@gleb.loc-20070527192244-26330  have 
kept both copies).

- move attempt to evaluate join->exec_const_cond() out of the "Extract constant part of each ON expression" loop
  (it got there by mistake when merging).

mysql-test/suite/maria/t/maria3.test:
  Fix when compiling with safemalloc
storage/maria/ha_maria.cc:
  Fix that MAX_FILE_SIZE is not limited on 32 bit machines.

- Add a testcase (the bug has already been fixed)

- Handle the case when the subquery's join is degenerate and so has zero tables.

from an ad hoc set of limitations
to a correct rule

Fixed reference to not initialized memory detected by valgrind

sql/sql_select.cc:
  A bit better fix for tmp-table problem:
  Use only dynamic_record format for group by and distinct.
storage/maria/ma_create.c:
  DYNAMIC_RECORD format doesn't pack VARCHAR fields.
  This change fixes a non-fatal uninitialized memory copy.

The function generate_derived_keys did not take into account the fact
that the last element in the array of keyuses could be just a barrier
element. In some cases it could lead to a crash of the server.

Also fixed a couple of other bugs in generate_derived_keys: the inner 
loop in the body of if this function did not change the cycle variables
properly.