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Rework the logic that factors constant expressions out of inner loops, making

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it both simpler and faster.

FossilOrigin-Name: 8dc5c76c766828d7c28090bec30ff48227e7b140
This commit is contained in:
drh
2013-11-15 01:10:18 +00:00
parent 01752bc805
commit f30a969b80
11 changed files with 82 additions and 167 deletions
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3
src/sqliteInt.h
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@@ -2278,6 +2278,7 @@ struct Parse {
int iReg; /* Reg with value of this column. 0 means none. */
int lru; /* Least recently used entry has the smallest value */
} aColCache[SQLITE_N_COLCACHE]; /* One for each column cache entry */
ExprList *pConstExpr;/* Constant expressions */
yDbMask writeMask; /* Start a write transaction on these databases */
yDbMask cookieMask; /* Bitmask of schema verified databases */
int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */
@@ -2891,7 +2892,6 @@ int sqlite3ExprCode(Parse*, Expr*, int);
int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
int sqlite3ExprCodeTarget(Parse*, Expr*, int);
int sqlite3ExprCodeAndCache(Parse*, Expr*, int);
void sqlite3ExprCodeConstants(Parse*, Expr*);
int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int);
void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
@@ -3259,6 +3259,7 @@ void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*);
int sqlite3VdbeParameterIndex(Vdbe*, const char*, int);
int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *);
void sqlite3ParserReset(Parse*);
int sqlite3Reprepare(Vdbe*);
void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);