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Evaluate multiple window functions in a single pass if they use the same

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window definition. Add xValue callbacks for other built-in aggregate
functions.

FossilOrigin-Name: c9f0f140941660ff368e5bb5752d54feb1964b7a9eac986d4bfb8f24a1c20d86
This commit is contained in:
dan
2018-05-17 19:24:08 +00:00
parent 2e362f9775
commit e2f781b9d1
9 changed files with 173 additions and 87 deletions
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13
src/sqliteInt.h
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@@ -1716,16 +1716,16 @@ struct FuncDestructor {
#define LIKEFUNC(zName, nArg, arg, flags) \
{nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8|flags, \
(void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} }
#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal) \
#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,0,0,#zName, {0}}
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,0,#zName, {0}}
#define AGGREGATE2(zName, nArg, arg, nc, xStep, xFinal, extraFlags) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|extraFlags, \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,0,0,#zName, {0}}
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xFinal,0,#zName, {0}}
#define WFUNCTION(zName, nArg, arg, xStep, xFinal, xValue, xInverse) \
{nArg, SQLITE_UTF8, \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}}
#define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xFinal,0,#zName, {0}}
/*
** All current savepoints are stored in a linked list starting at
@@ -3493,6 +3493,7 @@ struct Window {
void sqlite3WindowDelete(sqlite3*, Window*);
Window *sqlite3WindowAlloc(Parse*, int, int, Expr*, int , Expr*);
void sqlite3WindowAttach(Parse*, Expr*, Window*);
int sqlite3WindowCompare(Parse*, Window*, Window*);
/*
** Assuming zIn points to the first byte of a UTF-8 character,