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Overview
| Comment: | Add VdbeCoverage() macros on newly added VDBE branch operations. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | rowvalue |
| Files: | files | file ages | folders |
| SHA1: |
381aa73141db8ec59adbcb09e71af660 |
| User & Date: | drh 2016-08-12 11:25:49 |
Context
|
2016-08-18
| ||
| 15:15 | Simplify the vector comparison code generator logic, and the resulting VDBE code. (check-in: e2ad0b5d user: drh tags: rowvalue) | |
|
2016-08-13
| ||
| 10:02 | Attempt to simplify the logic and generated code for vector comparisons. Basic comparison operators are working, but there are many indexing test failures still to be worked through. (check-in: dfc028cf user: drh tags: vector-compare) | |
|
2016-08-12
| ||
| 11:25 | Add VdbeCoverage() macros on newly added VDBE branch operations. (check-in: 381aa731 user: drh tags: rowvalue) | |
| 11:01 | Fix a post-OOM memory leak. (check-in: 14009b32 user: drh tags: rowvalue) | |
Changes
Changes to src/expr.c.
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** operator is NULL, then the result is false if the index is
** completely empty, or NULL otherwise. */
if( destIfNull==destIfFalse ){
for(i=0; i<nVector; i++){
Expr *p = sqlite3ExprVectorField(pExpr->pLeft, i);
if( sqlite3ExprCanBeNull(p) ){
sqlite3VdbeAddOp2(v, OP_IsNull, r1+aiMap[i], destIfNull);
}
}
}else if( nVector==1 && sqlite3ExprCanBeNull(pExpr->pLeft) ){
int addr1 = sqlite3VdbeAddOp1(v, OP_NotNull, r1); VdbeCoverage(v);
sqlite3VdbeAddOp2(v, OP_Rewind, pExpr->iTable, destIfFalse);
VdbeCoverage(v);
sqlite3VdbeGoto(v, destIfNull);
................................................................................
if( nVector>1 && destIfNull!=destIfFalse ){
int iIdx = pExpr->iTable;
int addr;
int addrNext;
/* Search the index for the key. */
addr = sqlite3VdbeAddOp4Int(v, OP_Found, iIdx, 0, r1, nVector);
/* At this point the specified key is not present in the index,
** so the result of the IN(..) operator must be either NULL or
** 0. The vdbe code generated below figures out which. */
addrNext = 1+sqlite3VdbeAddOp2(v, OP_Rewind, iIdx, destIfFalse);
for(i=0; i<nVector; i++){
Expr *p;
CollSeq *pColl;
int r2 = sqlite3GetTempReg(pParse);
p = sqlite3ExprVectorField(pLeft, i);
pColl = sqlite3ExprCollSeq(pParse, p);
sqlite3VdbeAddOp3(v, OP_Column, iIdx, i, r2);
sqlite3VdbeAddOp4(v, OP_Eq, r1+i, 0, r2, (void*)pColl,P4_COLLSEQ);
sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL);
sqlite3VdbeAddOp2(v, OP_Next, iIdx, addrNext);
sqlite3VdbeAddOp2(v, OP_Goto, 0, destIfFalse);
sqlite3VdbeJumpHere(v, sqlite3VdbeCurrentAddr(v)-3);
sqlite3ReleaseTempReg(pParse, r2);
}
sqlite3VdbeAddOp2(v, OP_Goto, 0, destIfNull);
/* The key was found in the index. If it contains any NULL values,
................................................................................
** then the result of the IN(...) operator is NULL. Otherwise, the
** result is 1. */
sqlite3VdbeJumpHere(v, addr);
for(i=0; i<nVector; i++){
Expr *p = sqlite3ExprVectorField(pExpr->pLeft, i);
if( sqlite3ExprCanBeNull(p) ){
sqlite3VdbeAddOp2(v, OP_IsNull, r1+aiMap[i], destIfNull);
}
}
}else if( rRhsHasNull==0 ){
/* This branch runs if it is known at compile time that the RHS
** cannot contain NULL values. This happens as a result
** of "NOT NULL" constraints in the database schema.
|
> > > > > > |
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** operator is NULL, then the result is false if the index is
** completely empty, or NULL otherwise. */
if( destIfNull==destIfFalse ){
for(i=0; i<nVector; i++){
Expr *p = sqlite3ExprVectorField(pExpr->pLeft, i);
if( sqlite3ExprCanBeNull(p) ){
sqlite3VdbeAddOp2(v, OP_IsNull, r1+aiMap[i], destIfNull);
VdbeCoverage(v);
}
}
}else if( nVector==1 && sqlite3ExprCanBeNull(pExpr->pLeft) ){
int addr1 = sqlite3VdbeAddOp1(v, OP_NotNull, r1); VdbeCoverage(v);
sqlite3VdbeAddOp2(v, OP_Rewind, pExpr->iTable, destIfFalse);
VdbeCoverage(v);
sqlite3VdbeGoto(v, destIfNull);
................................................................................
if( nVector>1 && destIfNull!=destIfFalse ){
int iIdx = pExpr->iTable;
int addr;
int addrNext;
/* Search the index for the key. */
addr = sqlite3VdbeAddOp4Int(v, OP_Found, iIdx, 0, r1, nVector);
VdbeCoverage(v);
/* At this point the specified key is not present in the index,
** so the result of the IN(..) operator must be either NULL or
** 0. The vdbe code generated below figures out which. */
addrNext = 1+sqlite3VdbeAddOp2(v, OP_Rewind, iIdx, destIfFalse);
VdbeCoverage(v);
for(i=0; i<nVector; i++){
Expr *p;
CollSeq *pColl;
int r2 = sqlite3GetTempReg(pParse);
p = sqlite3ExprVectorField(pLeft, i);
pColl = sqlite3ExprCollSeq(pParse, p);
sqlite3VdbeAddOp3(v, OP_Column, iIdx, i, r2);
sqlite3VdbeAddOp4(v, OP_Eq, r1+i, 0, r2, (void*)pColl,P4_COLLSEQ);
sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL);
VdbeCoverage(v);
sqlite3VdbeAddOp2(v, OP_Next, iIdx, addrNext);
VdbeCoverage(v);
sqlite3VdbeAddOp2(v, OP_Goto, 0, destIfFalse);
sqlite3VdbeJumpHere(v, sqlite3VdbeCurrentAddr(v)-3);
sqlite3ReleaseTempReg(pParse, r2);
}
sqlite3VdbeAddOp2(v, OP_Goto, 0, destIfNull);
/* The key was found in the index. If it contains any NULL values,
................................................................................
** then the result of the IN(...) operator is NULL. Otherwise, the
** result is 1. */
sqlite3VdbeJumpHere(v, addr);
for(i=0; i<nVector; i++){
Expr *p = sqlite3ExprVectorField(pExpr->pLeft, i);
if( sqlite3ExprCanBeNull(p) ){
sqlite3VdbeAddOp2(v, OP_IsNull, r1+aiMap[i], destIfNull);
VdbeCoverage(v);
}
}
}else if( rRhsHasNull==0 ){
/* This branch runs if it is known at compile time that the RHS
** cannot contain NULL values. This happens as a result
** of "NOT NULL" constraints in the database schema.
|