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Overview
Comment:Avoid problems when a query has a GROUP BY and an ORDER BY but no FROM clause.
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SHA1: e527d96a1e098ade4e9d124b630a8c2ea2ac9b36
User & Date: drh 2015-04-12 01:22:04.580
Context
2015-04-12
17:35
Fix a problem with a stale Select.pWith pointer when a CTE is used together with a compound query and an ORDER BY clause. (check-in: 9a453f52a2 user: drh tags: trunk)
01:33
Merge all recent trunk enhancements into the sessions branch. (check-in: 5f14f34f07 user: drh tags: sessions)
01:22
Avoid problems when a query has a GROUP BY and an ORDER BY but no FROM clause. (check-in: e527d96a1e user: drh tags: trunk)
2015-04-11
20:44
Optimizations for VACUUM, CREATE INDEX and some cases of ORDER BY. (check-in: 79326d6eec user: dan tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/where.c.
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      }
    }else{
      pWInfo->nOBSat = pFrom->isOrdered;
      if( pWInfo->nOBSat<0 ) pWInfo->nOBSat = 0;
      pWInfo->revMask = pFrom->revLoop;
    }
    if( (pWInfo->wctrlFlags & WHERE_SORTBYGROUP)
        && pWInfo->nOBSat==pWInfo->pOrderBy->nExpr
    ){
      Bitmask revMask = 0;
      int nOrder = wherePathSatisfiesOrderBy(pWInfo, pWInfo->pOrderBy, 
          pFrom, 0, nLoop-1, pFrom->aLoop[nLoop-1], &revMask
      );
      assert( pWInfo->sorted==0 );
      if( nOrder==pWInfo->pOrderBy->nExpr ){








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      }
    }else{
      pWInfo->nOBSat = pFrom->isOrdered;
      if( pWInfo->nOBSat<0 ) pWInfo->nOBSat = 0;
      pWInfo->revMask = pFrom->revLoop;
    }
    if( (pWInfo->wctrlFlags & WHERE_SORTBYGROUP)
        && pWInfo->nOBSat==pWInfo->pOrderBy->nExpr && nLoop>0
    ){
      Bitmask revMask = 0;
      int nOrder = wherePathSatisfiesOrderBy(pWInfo, pWInfo->pOrderBy, 
          pFrom, 0, nLoop-1, pFrom->aLoop[nLoop-1], &revMask
      );
      assert( pWInfo->sorted==0 );
      if( nOrder==pWInfo->pOrderBy->nExpr ){
︙︙
Changes to test/orderby1.test.
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} {}
do_execsql_test 5.1 {
  EXPLAIN QUERY PLAN SELECT 5 UNION ALL SELECT 3 ORDER BY 1
} {~/B-TREE/}
do_execsql_test 5.2 {
  SELECT 5 UNION ALL SELECT 3 ORDER BY 1
} {3 5}




# The following test (originally derived from a single test within fuzz.test)
# verifies that a PseudoTable cursor is not closed prematurely in a deeply
# nested query.  This test caused a segfault on 3.8.5 beta.
#
do_execsql_test 6.0 {
  CREATE TABLE abc(a, b, c);








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>
>








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} {}
do_execsql_test 5.1 {
  EXPLAIN QUERY PLAN SELECT 5 UNION ALL SELECT 3 ORDER BY 1
} {~/B-TREE/}
do_execsql_test 5.2 {
  SELECT 5 UNION ALL SELECT 3 ORDER BY 1
} {3 5}
do_execsql_test 5.3 {
  SELECT 986 AS x GROUP BY X ORDER BY X
} {986}

# The following test (originally derived from a single test within fuzz.test)
# verifies that a PseudoTable cursor is not closed prematurely in a deeply
# nested query.  This test caused a segfault on 3.8.5 beta.
#
do_execsql_test 6.0 {
  CREATE TABLE abc(a, b, c);
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