diff options
Diffstat (limited to 'src/resolve.c')
| -rw-r--r-- | src/resolve.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/src/resolve.c b/src/resolve.c index a9c20b101..9be62c090 100644 --- a/src/resolve.c +++ b/src/resolve.c @@ -815,15 +815,18 @@ static int resolveExprStep(Walker *pWalker, Expr *pExpr){ if( pDef->funcFlags & (SQLITE_FUNC_CONSTANT|SQLITE_FUNC_SLOCHNG) ){ /* For the purposes of the EP_ConstFunc flag, date and time ** functions and other functions that change slowly are considered - ** constant because they are constant for the duration of one query */ + ** constant because they are constant for the duration of one query. + ** This allows them to be factored out of inner loops. */ ExprSetProperty(pExpr,EP_ConstFunc); } if( (pDef->funcFlags & SQLITE_FUNC_CONSTANT)==0 ){ /* Date/time functions that use 'now', and other functions like ** sqlite_version() that might change over time cannot be used ** in an index. */ - notValid(pParse, pNC, "non-deterministic functions", - NC_IdxExpr|NC_PartIdx|NC_GenCol); + notValid(pParse, pNC, "non-deterministic functions", NC_SelfRef); + }else{ + assert( (NC_SelfRef & 0xff)==NC_SelfRef ); /* Must fit in 8 bits */ + pExpr->op2 = pNC->ncFlags & NC_SelfRef; } if( (pDef->funcFlags & SQLITE_FUNC_INTERNAL)!=0 && pParse->nested==0 @@ -1789,11 +1792,13 @@ void sqlite3ResolveSelectNames( ** Resolve names in expressions that can only reference a single table ** or which cannot reference any tables at all. Examples: ** -** (1) CHECK constraints -** (2) WHERE clauses on partial indices -** (3) Expressions in indexes on expressions -** (4) Expression arguments to VACUUM INTO. -** (5) GENERATED ALWAYS as expressions +** "type" flag +** ------------ +** (1) CHECK constraints NC_IsCheck +** (2) WHERE clauses on partial indices NC_PartIdx +** (3) Expressions in indexes on expressions NC_IdxExpr +** (4) Expression arguments to VACUUM INTO. 0 +** (5) GENERATED ALWAYS as expressions NC_GenCol ** ** In all cases except (4), the Expr.iTable value for Expr.op==TK_COLUMN ** nodes of the expression is set to -1 and the Expr.iColumn value is |