[TRAFODION-2246] group by rollup feature

core/sql/bin/SqlciErrors.txt

@@ -1372,6 +1372,7 @@ $1~String1 --------------------------------
 4381 42000 99999 BEGINNER MINOR LOGONLY Holdable cursor attribute is incompatible for the isolation level.
 4382 42000 99999 BEGINNER MINOR LOGONLY Holdable cursor attribute cannot be set for a CALL statement.
 4383 ZZZZZ 99999 BEGINNER MINOR DBADMIN A float value cannot be inserted into a numeric data type column $0~ColumnName, if the column is part of the partitioning key.
+4384 ZZZZZ 99999 BEGINNER MINOR DBADMIN GROUP BY ROLLUP clause not allowed for this statement. Reason: $0~String0
 4390 ZZZZZ 99999 BEGINNER MAJOR DBADMIN The OLAP History row size exceeds the limit of $0~Int0 bytes
 4391 ZZZZZ 99999 BEGINNER MAJOR DBADMIN Paramaters and outer references in the PARTITION BY or ORDER BY clause of a window function are not supported.
 4400 ZZZZZ 99999 BEGINNER MAJOR LOGONLY Internal error

core/sql/comexe/ComTdbSortGrby.cpp

@@ -83,7 +83,8 @@ ComTdbSortGrby::ComTdbSortGrby(ex_expr * aggr_expr,
   moveExpr_(move_expr),
   havingExpr_(having_expr),
   flags_(0),
-  tdbChild_(child_tdb)
+  tdbChild_(child_tdb),
+  numRollupGroups_(-1)
 {
   if (tolerateNonFatalError)
     setTolerateNonFatalError(TRUE);

core/sql/comexe/ComTdbSortGrby.h

@@ -46,8 +46,14 @@
 class ComTdbSortGrby : public ComTdb
 {
   friend class ex_sort_grby_tcb;
+  friend class ex_sort_grby_rollup_tcb;
   friend class ex_sort_grby_private_state;
+
 protected:
+  enum
+    {
+      IS_ROLLUP       = 0x0001
+    };
 
   ComTdbPtr tdbChild_;                    // 00-07
   ExExprPtr aggrExpr_;                    // 08-15
@@ -63,7 +69,9 @@ class ComTdbSortGrby : public ComTdb
 
   UInt16 flags_;                          // 46-47
 
-  char fillersComTdbSortGrby_[40];        // 48-87
+  Int16  numRollupGroups_;                // 48-49
+
+  char fillersComTdbSortGrby_[38];        // 50-87
 
 public:
   // Constructor
@@ -90,6 +98,9 @@ NA_EIDPROC
 NA_EIDPROC
   ~ComTdbSortGrby();
 
+  void setNumRollupGroups(Int16 v) { numRollupGroups_ = v; }
+  Int16 numRollupGroups() { return numRollupGroups_; }
+
   // ---------------------------------------------------------------------
   // Redefine virtual functions required for Versioning.
   //----------------------------------------------------------------------
@@ -106,8 +117,6 @@ NA_EIDPROC
     ComTdb::populateImageVersionIDArray();
   }
 
-
-
 NA_EIDPROC
   virtual short getClassSize() { return (short)sizeof(ComTdbSortGrby); }  
   Long pack(void *);
@@ -163,7 +172,11 @@ NA_EIDPROC
      else
 	return NULL;
   }   
-
+
+  NABoolean isRollup() {return ((flags_ & IS_ROLLUP) != 0);};
+  void setIsRollup(NABoolean v)
+  {(v ? flags_ |= IS_ROLLUP : flags_ &= ~IS_ROLLUP);}
+
 };
 
 NA_EIDPROC
@@ -175,7 +188,7 @@ inline ComTdb * ComTdbSortGrby::getChildTdb(){
   Description : Return ComTdb* depending on the position argument.
                   Position 0 means the left most child.
   Comments    :
-  History     : Yeogirl Yun                                      8/22/95
+  History     : 
                  Initial Revision.
 *****************************************************************************/
 inline const ComTdb* ComTdbSortGrby::getChild(Int32 pos) const

core/sql/executor/ex_globals.h

@@ -198,6 +198,9 @@ NA_EIDPROC
 
   Int64 &rowNum() { return rowNum_; }
 
+  void setRollupColumnNum(Int16 v) { rollupColumnNum_ = v; }
+  Int16 getRollupColumnNum() { return rollupColumnNum_; }
+
 private:
   enum FlagsTypeEnum 
   {
@@ -277,6 +280,17 @@ NA_EIDPROC
   // Executor code does not access the contents.
   //  void * lobGlob_;
 
+  // This value is set when grouping expression to compute rollup is
+  // evaluated. Caller (sort_grby_rollup_tcb) need to know the number
+  // of the grouping column that caused a comparison to fail.
+  // This value is set during comp clause eval. Caller resets it before and
+  // after call to expression evaluator.
+  // It is only a short duration global setting used to pass info from/to
+  // executor to expressions.
+  // also see class ex_comp_clause in exp/exp_clause_derived.h and ex_sort_grby_rollup_tcb
+  // on its usage.
+  Int16 rollupColumnNum_;
+
 };
 
 #endif