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Overview
| Comment: | Show changes to the column cache when PRAGMA vdbe_addoptrace=ON is set. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | column-cache-debug |
| Files: | files | file ages | folders |
| SHA1: |
4c6a659c432e4f7c0285f58675a67f96 |
| User & Date: | drh 2013-12-18 15:11:47 |
Context
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2013-12-18
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| 16:27 | Remove an unnecessary column-cache flush. Add another test case to the speedtest1.c program to accentuate the benefit of not flushing the cache at that point. Closed-Leaf check-in: 97fdfc6b user: drh tags: column-cache-debug | |
| 15:11 | Show changes to the column cache when PRAGMA vdbe_addoptrace=ON is set. check-in: 4c6a659c user: drh tags: column-cache-debug | |
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2013-12-17
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| 16:32 | Add evidence marks and additional test cases for the printf() SQL function. check-in: 93121d30 user: drh tags: trunk | |
Changes
Changes to src/expr.c.
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/*
** Remember the current column cache context. Any new entries added
** added to the column cache after this call are removed when the
** corresponding pop occurs.
*/
void sqlite3ExprCachePush(Parse *pParse){
pParse->iCacheLevel++;
}
/*
** Remove from the column cache any entries that were added since the
** the previous N Push operations. In other words, restore the cache
** to the state it was in N Pushes ago.
*/
void sqlite3ExprCachePop(Parse *pParse, int N){
int i;
struct yColCache *p;
assert( N>0 );
assert( pParse->iCacheLevel>=N );
pParse->iCacheLevel -= N;
for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
if( p->iReg && p->iLevel>pParse->iCacheLevel ){
cacheEntryClear(pParse, p);
p->iReg = 0;
}
}
}
................................................................................
/*
** Clear all column cache entries.
*/
void sqlite3ExprCacheClear(Parse *pParse){
int i;
struct yColCache *p;
for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
if( p->iReg ){
cacheEntryClear(pParse, p);
p->iReg = 0;
}
}
}
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/*
** Remember the current column cache context. Any new entries added
** added to the column cache after this call are removed when the
** corresponding pop occurs.
*/
void sqlite3ExprCachePush(Parse *pParse){
pParse->iCacheLevel++;
#ifdef SQLITE_DEBUG
if( pParse->db->flags & SQLITE_VdbeAddopTrace ){
printf("PUSH to %d\n", pParse->iCacheLevel);
}
#endif
}
/*
** Remove from the column cache any entries that were added since the
** the previous N Push operations. In other words, restore the cache
** to the state it was in N Pushes ago.
*/
void sqlite3ExprCachePop(Parse *pParse, int N){
int i;
struct yColCache *p;
assert( N>0 );
assert( pParse->iCacheLevel>=N );
pParse->iCacheLevel -= N;
#ifdef SQLITE_DEBUG
if( pParse->db->flags & SQLITE_VdbeAddopTrace ){
printf("POP to %d\n", pParse->iCacheLevel);
}
#endif
for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
if( p->iReg && p->iLevel>pParse->iCacheLevel ){
cacheEntryClear(pParse, p);
p->iReg = 0;
}
}
}
................................................................................
/*
** Clear all column cache entries.
*/
void sqlite3ExprCacheClear(Parse *pParse){
int i;
struct yColCache *p;
#if SQLITE_DEBUG
if( pParse->db->flags & SQLITE_VdbeAddopTrace ){
printf("CLEAR\n");
}
#endif
for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
if( p->iReg ){
cacheEntryClear(pParse, p);
p->iReg = 0;
}
}
}
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Changes to src/select.c.
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/*
** Get a VDBE for the given parser context. Create a new one if necessary.
** If an error occurs, return NULL and leave a message in pParse.
*/
Vdbe *sqlite3GetVdbe(Parse *pParse){
Vdbe *v = pParse->pVdbe;
if( v==0 ){
v = pParse->pVdbe = sqlite3VdbeCreate(pParse->db);
#ifndef SQLITE_OMIT_TRACE
if( v ){
sqlite3VdbeAddOp0(v, OP_Trace);
}
#endif
}
return v;
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/*
** Get a VDBE for the given parser context. Create a new one if necessary.
** If an error occurs, return NULL and leave a message in pParse.
*/
Vdbe *sqlite3GetVdbe(Parse *pParse){
Vdbe *v = pParse->pVdbe;
if( v==0 ){
v = pParse->pVdbe = sqlite3VdbeCreate(pParse);
#ifndef SQLITE_OMIT_TRACE
if( v ){
sqlite3VdbeAddOp0(v, OP_Trace);
}
#endif
}
return v;
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Changes to src/vdbe.h.
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*/
#include "opcodes.h"
/*
** Prototypes for the VDBE interface. See comments on the implementation
** for a description of what each of these routines does.
*/
Vdbe *sqlite3VdbeCreate(sqlite3*);
int sqlite3VdbeAddOp0(Vdbe*,int);
int sqlite3VdbeAddOp1(Vdbe*,int,int);
int sqlite3VdbeAddOp2(Vdbe*,int,int,int);
int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int);
int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int);
int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int);
int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
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*/
#include "opcodes.h"
/*
** Prototypes for the VDBE interface. See comments on the implementation
** for a description of what each of these routines does.
*/
Vdbe *sqlite3VdbeCreate(Parse*);
int sqlite3VdbeAddOp0(Vdbe*,int);
int sqlite3VdbeAddOp1(Vdbe*,int,int);
int sqlite3VdbeAddOp2(Vdbe*,int,int,int);
int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int);
int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int);
int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int);
int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
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Changes to src/vdbeInt.h.
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struct Vdbe {
sqlite3 *db; /* The database connection that owns this statement */
Op *aOp; /* Space to hold the virtual machine's program */
Mem *aMem; /* The memory locations */
Mem **apArg; /* Arguments to currently executing user function */
Mem *aColName; /* Column names to return */
Mem *pResultSet; /* Pointer to an array of results */
int nMem; /* Number of memory locations currently allocated */
int nOp; /* Number of instructions in the program */
int nOpAlloc; /* Number of slots allocated for aOp[] */
int nLabel; /* Number of labels used */
int *aLabel; /* Space to hold the labels */
u16 nResColumn; /* Number of columns in one row of the result set */
int nCursor; /* Number of slots in apCsr[] */
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struct Vdbe {
sqlite3 *db; /* The database connection that owns this statement */
Op *aOp; /* Space to hold the virtual machine's program */
Mem *aMem; /* The memory locations */
Mem **apArg; /* Arguments to currently executing user function */
Mem *aColName; /* Column names to return */
Mem *pResultSet; /* Pointer to an array of results */
#ifdef SQLITE_DEBUG
Parse *pParse; /* Parsing context used to create this Vdbe */
#endif
int nMem; /* Number of memory locations currently allocated */
int nOp; /* Number of instructions in the program */
int nOpAlloc; /* Number of slots allocated for aOp[] */
int nLabel; /* Number of labels used */
int *aLabel; /* Space to hold the labels */
u16 nResColumn; /* Number of columns in one row of the result set */
int nCursor; /* Number of slots in apCsr[] */
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Changes to src/vdbeaux.c.
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*/ #include "sqliteInt.h" #include "vdbeInt.h" /* ** Create a new virtual database engine. */ Vdbe *sqlite3VdbeCreate(sqlite3 *db){ Vdbe *p; p = sqlite3DbMallocZero(db, sizeof(Vdbe) ); if( p==0 ) return 0; p->db = db; if( db->pVdbe ){ db->pVdbe->pPrev = p; } p->pNext = db->pVdbe; p->pPrev = 0; db->pVdbe = p; p->magic = VDBE_MAGIC_INIT; return p; } /* ** Remember the SQL string for a prepared statement. */ void sqlite3VdbeSetSql(Vdbe *p, const char *z, int n, int isPrepareV2){ ................................................................................ pOp->p4.p = 0; pOp->p4type = P4_NOTUSED; #ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS pOp->zComment = 0; #endif #ifdef SQLITE_DEBUG if( p->db->flags & SQLITE_VdbeAddopTrace ){ sqlite3VdbePrintOp(0, i, &p->aOp[i]); test_addop_breakpoint(); } #endif #ifdef VDBE_PROFILE pOp->cycles = 0; pOp->cnt = 0; |
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*/ #include "sqliteInt.h" #include "vdbeInt.h" /* ** Create a new virtual database engine. */ Vdbe *sqlite3VdbeCreate(Parse *pParse){ sqlite3 *db = pParse->db; Vdbe *p; p = sqlite3DbMallocZero(db, sizeof(Vdbe) ); if( p==0 ) return 0; p->db = db; if( db->pVdbe ){ db->pVdbe->pPrev = p; } p->pNext = db->pVdbe; p->pPrev = 0; db->pVdbe = p; p->magic = VDBE_MAGIC_INIT; #if SQLITE_DEBUG p->pParse = pParse; #endif return p; } /* ** Remember the SQL string for a prepared statement. */ void sqlite3VdbeSetSql(Vdbe *p, const char *z, int n, int isPrepareV2){ ................................................................................ pOp->p4.p = 0; pOp->p4type = P4_NOTUSED; #ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS pOp->zComment = 0; #endif #ifdef SQLITE_DEBUG if( p->db->flags & SQLITE_VdbeAddopTrace ){ int jj, kk; Parse *pParse = p->pParse; for(jj=kk=0; jj<SQLITE_N_COLCACHE; jj++){ struct yColCache *x = pParse->aColCache + jj; if( x->iLevel>pParse->iCacheLevel || x->iReg==0 ) continue; printf(" r[%d]={%d:%d}", x->iReg, x->iTable, x->iColumn); kk++; } if( kk ) printf("\n"); sqlite3VdbePrintOp(0, i, &p->aOp[i]); test_addop_breakpoint(); } #endif #ifdef VDBE_PROFILE pOp->cycles = 0; pOp->cnt = 0; |
Changes to src/vdbeblob.c.
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zErr = sqlite3MPrintf(db, "cannot open %s column for writing", zFault);
rc = SQLITE_ERROR;
sqlite3BtreeLeaveAll(db);
goto blob_open_out;
}
}
pBlob->pStmt = (sqlite3_stmt *)sqlite3VdbeCreate(db);
assert( pBlob->pStmt || db->mallocFailed );
if( pBlob->pStmt ){
Vdbe *v = (Vdbe *)pBlob->pStmt;
int iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
sqlite3VdbeAddOpList(v, sizeof(openBlob)/sizeof(VdbeOpList), openBlob);
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zErr = sqlite3MPrintf(db, "cannot open %s column for writing", zFault);
rc = SQLITE_ERROR;
sqlite3BtreeLeaveAll(db);
goto blob_open_out;
}
}
pBlob->pStmt = (sqlite3_stmt *)sqlite3VdbeCreate(pParse);
assert( pBlob->pStmt || db->mallocFailed );
if( pBlob->pStmt ){
Vdbe *v = (Vdbe *)pBlob->pStmt;
int iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
sqlite3VdbeAddOpList(v, sizeof(openBlob)/sizeof(VdbeOpList), openBlob);
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