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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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src/func.c
+22 -6
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@@ -1675,6 +1675,20 @@ static void groupConcatFinalize(sqlite3_context *context){
}
}
}
static void groupConcatValue(sqlite3_context *context){
sqlite3_str *pAccum;
pAccum = (sqlite3_str*)sqlite3_aggregate_context(context, 0);
if( pAccum ){
if( pAccum->accError==SQLITE_TOOBIG ){
sqlite3_result_error_toobig(context);
}else if( pAccum->accError==SQLITE_NOMEM ){
sqlite3_result_error_nomem(context);
}else{
const char *zText = sqlite3_str_value(pAccum);
sqlite3_result_text(context, zText, -1, SQLITE_TRANSIENT);
}
}
}
/*
** This routine does per-connection function registration. Most
@@ -1859,14 +1873,16 @@ void sqlite3RegisterBuiltinFunctions(void){
FUNCTION(zeroblob, 1, 0, 0, zeroblobFunc ),
FUNCTION(substr, 2, 0, 0, substrFunc ),
FUNCTION(substr, 3, 0, 0, substrFunc ),
WFUNCTION(sum, 1, 0, sumStep, sumFinalize, sumFinalize, 0),
AGGREGATE(total, 1, 0, 0, sumStep, totalFinalize ),
AGGREGATE(avg, 1, 0, 0, sumStep, avgFinalize ),
WAGGREGATE(sum, 1, 0, 0, sumStep, sumFinalize),
WAGGREGATE(total, 1, 0, 0, sumStep, totalFinalize ),
WAGGREGATE(avg, 1, 0, 0, sumStep, avgFinalize ),
AGGREGATE2(count, 0, 0, 0, countStep, countFinalize,
SQLITE_FUNC_COUNT ),
AGGREGATE(count, 1, 0, 0, countStep, countFinalize ),
AGGREGATE(group_concat, 1, 0, 0, groupConcatStep, groupConcatFinalize),
AGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize),
WAGGREGATE(count, 1, 0, 0, countStep, countFinalize ),
AGGREGATE(group_concat, 1, 0, 0, groupConcatStep, groupConcatFinalize,
groupConcatValue),
AGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize,
groupConcatValue),
LIKEFUNC(glob, 2, &globInfo, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE),
#ifdef SQLITE_CASE_SENSITIVE_LIKE