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Infrastructure for the DISTINCT keyword in aggregate functions. But it does

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not work yet.  If you try to use it you get an error message. (CVS 2680)

FossilOrigin-Name: 4d62e36fe3819c2a1412737c2ec8a91ddc5e1777
This commit is contained in:
drh
2005-09-09 01:33:19 +00:00
parent b4746b9e33
commit fd35797469
5 changed files with 26 additions and 14 deletions
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5
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.412 2005/09/08 14:17:20 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.413 2005/09/09 01:33:19 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -825,6 +825,7 @@ struct AggInfo {
Expr *pExpr; /* Expression encoding the function */
FuncDef *pFunc; /* The aggregate function implementation */
int iMem; /* Memory location that acts as accumulator */
int iDistinct; /* Virtual table used to enforce DISTINCT */
} *aFunc;
int nFunc; /* Number of entries in aFunc[] */
int nFuncAlloc; /* Number of slots allocated for aFunc[] */
@@ -903,7 +904,7 @@ struct Expr {
#define EP_Agg 0x02 /* Contains one or more aggregate functions */
#define EP_Resolved 0x04 /* IDs have been resolved to COLUMNs */
#define EP_Error 0x08 /* Expression contains one or more errors */
#define EP_Not 0x10 /* Operator preceeded by NOT */
#define EP_Distinct 0x10 /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect 0x20 /* pSelect is correlated, not constant */
#define EP_Dequoted 0x40 /* True if the string has been dequoted */