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Improvements to the application-defined function mechanism so that it is

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more compact and runs faster, especially when the application defines
thousands of new SQL functions.

FossilOrigin-Name: 3201fbcc5105d23132e6b8b7ac825e66af4f8a39
This commit is contained in:
drh
2016-02-15 00:34:16 +00:00
parent e75a9eb9bb
commit 80738d9c3e
15 changed files with 189 additions and 182 deletions
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8
src/expr.c
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@@ -2888,7 +2888,6 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
ExprList *pFarg; /* List of function arguments */
int nFarg; /* Number of function arguments */
FuncDef *pDef; /* The function definition object */
int nId; /* Length of the function name in bytes */
const char *zId; /* The function name */
u32 constMask = 0; /* Mask of function arguments that are constant */
int i; /* Loop counter */
@@ -2904,10 +2903,9 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
nFarg = pFarg ? pFarg->nExpr : 0;
assert( !ExprHasProperty(pExpr, EP_IntValue) );
zId = pExpr->u.zToken;
nId = sqlite3Strlen30(zId);
pDef = sqlite3FindFunction(db, zId, nId, nFarg, enc, 0);
pDef = sqlite3FindFunction(db, zId, nFarg, enc, 0);
if( pDef==0 || pDef->xFinalize!=0 ){
sqlite3ErrorMsg(pParse, "unknown function: %.*s()", nId, zId);
sqlite3ErrorMsg(pParse, "unknown function: %s()", zId);
break;
}
@@ -4132,7 +4130,7 @@ static int analyzeAggregate(Walker *pWalker, Expr *pExpr){
pItem->iMem = ++pParse->nMem;
assert( !ExprHasProperty(pExpr, EP_IntValue) );
pItem->pFunc = sqlite3FindFunction(pParse->db,
pExpr->u.zToken, sqlite3Strlen30(pExpr->u.zToken),
pExpr->u.zToken,
pExpr->x.pList ? pExpr->x.pList->nExpr : 0, enc, 0);
if( pExpr->flags & EP_Distinct ){
pItem->iDistinct = pParse->nTab++;