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Experimental implementation of FILTER clause for aggregate functions.

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FossilOrigin-Name: 1f1ae2d6ac8dcbb62e5aa3dc17bc67d559cb565fc0d0a8c00a596075d35f8130
This commit is contained in:
dan
2019-07-02 11:56:47 +00:00
parent 00a6153faf
commit 6ba7ab0d25
12 changed files with 342 additions and 45 deletions
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8
src/sqliteInt.h
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@@ -2491,7 +2491,8 @@ struct Expr {
union {
Table *pTab; /* TK_COLUMN: Table containing column. Can be NULL
** for a column of an index on an expression */
Window *pWin; /* TK_FUNCTION: Window definition for the func */
Window *pWin; /* EP_WinFunc: Window definition for the func */
Expr *pFilter; /* EP_Filter: Filter definition for the func */
struct { /* TK_IN, TK_SELECT, and TK_EXISTS */
int iAddr; /* Subroutine entry address */
int regReturn; /* Register used to hold return address */
@@ -2536,6 +2537,7 @@ struct Expr {
#define EP_Static 0x8000000 /* Held in memory not obtained from malloc() */
#define EP_IsTrue 0x10000000 /* Always has boolean value of TRUE */
#define EP_IsFalse 0x20000000 /* Always has boolean value of FALSE */
#define EP_Filter 0x40000000 /* TK_[AGG_]FUNCTION with Expr.y.pFilter set */
/*
** The EP_Propagate mask is a set of properties that automatically propagate
@@ -3602,7 +3604,7 @@ struct Window {
void sqlite3WindowDelete(sqlite3*, Window*);
void sqlite3WindowListDelete(sqlite3 *db, Window *p);
Window *sqlite3WindowAlloc(Parse*, int, int, Expr*, int , Expr*, u8);
void sqlite3WindowAttach(Parse*, Expr*, Window*);
void sqlite3WindowAttach(Parse*, Expr*, Expr*, Window*);
int sqlite3WindowCompare(Parse*, Window*, Window*);
void sqlite3WindowCodeInit(Parse*, Window*);
void sqlite3WindowCodeStep(Parse*, Select*, WhereInfo*, int, int);
@@ -3617,7 +3619,7 @@ Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*);
#else
# define sqlite3WindowDelete(a,b)
# define sqlite3WindowFunctions()
# define sqlite3WindowAttach(a,b,c)
# define sqlite3WindowAttach(a,b,c,d)
#endif
/*