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Evaluate expressions only once when the same expression is used in both the

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result set and in the ORDER BY clause.

FossilOrigin-Name: c2f3bbad778504681b39ab9399a1eb3c1a35ab3f
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drh
2015-08-26 14:01:41 +00:00
parent 0576bc59a7
commit 5579d59fb3
8 changed files with 93 additions and 26 deletions
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src/sqliteInt.h
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@@ -3376,9 +3376,10 @@ void sqlite3ExprCodeAtInit(Parse*, Expr*, int, u8);
int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
int sqlite3ExprCodeTarget(Parse*, Expr*, int);
void sqlite3ExprCodeAndCache(Parse*, Expr*, int);
int sqlite3ExprCodeExprList(Parse*, ExprList*, int, u8);
int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int, u8);
#define SQLITE_ECEL_DUP 0x01 /* Deep, not shallow copies */
#define SQLITE_ECEL_FACTOR 0x02 /* Factor out constant terms */
#define SQLITE_ECEL_REF 0x04 /* Use ExprList.u.x.iOrderByCol */
void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
void sqlite3ExprIfFalseDup(Parse*, Expr*, int, int);