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Overview
| Comment: | Minor bug fixes and enhancements to the pragma eponymous virtual tables. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | pragma-as-vtab |
| Files: | files | file ages | folders |
| SHA1: |
3f8f461504139a4efea0e033e3a274cc |
| User & Date: | drh 2016-12-16 02:14:15 |
Context
|
2016-12-16
| ||
| 02:31 | Simplifications to facilitate full test coverage. check-in: 01afc515 user: drh tags: pragma-as-vtab | |
| 02:14 | Minor bug fixes and enhancements to the pragma eponymous virtual tables. check-in: 3f8f4615 user: drh tags: pragma-as-vtab | |
| 01:09 | Merge enhancements from trunk, and especially the ability to use temp.sqlite_master as an alias for sqlite_temp_master. check-in: 994a4401 user: drh tags: pragma-as-vtab | |
Changes
Changes to src/pragma.c.
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sqlite3StrAccumInit(&acc, 0, zBuf, sizeof(zBuf), 0);
sqlite3StrAccumAppendAll(&acc, "CREATE TABLE x");
for(i=0, j=pPragma->iPragCName; i<pPragma->nPragCName; i++, j++){
sqlite3XPrintf(&acc, "%c\"%s\"", cSep, pragCName[j]);
cSep = ',';
}
j = 0;
if( pPragma->mPragFlg & PragFlg_Result1 ){
sqlite3StrAccumAppendAll(&acc, ",arg HIDDEN");
j++;
}
if( pPragma->mPragFlg & (PragFlg_SchemaOpt|PragFlg_SchemaReq) ){
sqlite3StrAccumAppendAll(&acc, ",schema HIDDEN");
................................................................................
seen[1] = 0;
for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
if( pConstraint->usable==0 ) continue;
if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
if( pConstraint->iColumn < pTab->iHidden ) continue;
j = pConstraint->iColumn - pTab->iHidden;
assert( j < 2 );
if( seen[j] ) continue;
seen[j] = i+1;
}
if( seen[0]==0 ){
pIdxInfo->estimatedCost = (double)2147483647;
pIdxInfo->estimatedRows = 2147483647;
return SQLITE_OK;
}
................................................................................
}
}
/* Close a pragma virtual table cursor */
static int pragmaVtabClose(sqlite3_vtab_cursor *cur){
PragmaVtabCursor *pCsr = (PragmaVtabCursor*)cur;
pragmaVtabCursorClear(pCsr);
return SQLITE_OK;
}
/* Advance the pragma virtual table cursor to the next row */
static int pragmaVtabNext(sqlite3_vtab_cursor *pVtabCursor){
PragmaVtabCursor *pCsr = (PragmaVtabCursor*)pVtabCursor;
int rc = SQLITE_OK;
/* Increment the xRowid value */
pCsr->iRowid++;
if( pCsr->pPragma ){
if( SQLITE_ROW!=sqlite3_step(pCsr->pPragma) ){
rc = sqlite3_finalize(pCsr->pPragma);
pCsr->pPragma = 0;
pragmaVtabCursorClear(pCsr);
}
}
return rc;
}
/*
** Pragma virtual table module xFilter method.
*/
static int pragmaVtabFilter(
|
> > > > > < > | < |
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sqlite3StrAccumInit(&acc, 0, zBuf, sizeof(zBuf), 0);
sqlite3StrAccumAppendAll(&acc, "CREATE TABLE x");
for(i=0, j=pPragma->iPragCName; i<pPragma->nPragCName; i++, j++){
sqlite3XPrintf(&acc, "%c\"%s\"", cSep, pragCName[j]);
cSep = ',';
}
if( i==0 ){
sqlite3XPrintf(&acc, "(\"%s\"", pPragma->zName);
cSep = ',';
i++;
}
j = 0;
if( pPragma->mPragFlg & PragFlg_Result1 ){
sqlite3StrAccumAppendAll(&acc, ",arg HIDDEN");
j++;
}
if( pPragma->mPragFlg & (PragFlg_SchemaOpt|PragFlg_SchemaReq) ){
sqlite3StrAccumAppendAll(&acc, ",schema HIDDEN");
................................................................................
seen[1] = 0;
for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
if( pConstraint->usable==0 ) continue;
if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
if( pConstraint->iColumn < pTab->iHidden ) continue;
j = pConstraint->iColumn - pTab->iHidden;
assert( j < 2 );
seen[j] = i+1;
}
if( seen[0]==0 ){
pIdxInfo->estimatedCost = (double)2147483647;
pIdxInfo->estimatedRows = 2147483647;
return SQLITE_OK;
}
................................................................................
}
}
/* Close a pragma virtual table cursor */
static int pragmaVtabClose(sqlite3_vtab_cursor *cur){
PragmaVtabCursor *pCsr = (PragmaVtabCursor*)cur;
pragmaVtabCursorClear(pCsr);
sqlite3_free(pCsr);
return SQLITE_OK;
}
/* Advance the pragma virtual table cursor to the next row */
static int pragmaVtabNext(sqlite3_vtab_cursor *pVtabCursor){
PragmaVtabCursor *pCsr = (PragmaVtabCursor*)pVtabCursor;
int rc = SQLITE_OK;
/* Increment the xRowid value */
pCsr->iRowid++;
assert( pCsr->pPragma );
if( SQLITE_ROW!=sqlite3_step(pCsr->pPragma) ){
rc = sqlite3_finalize(pCsr->pPragma);
pCsr->pPragma = 0;
pragmaVtabCursorClear(pCsr);
}
return rc;
}
/*
** Pragma virtual table module xFilter method.
*/
static int pragmaVtabFilter(
|
Changes to src/vtab.c.
53 54 55 56 57 58 59 60 61 62 63 64 65 66 |
pMod->xDestroy = xDestroy;
pMod->pEpoTab = 0;
pDel = (Module *)sqlite3HashInsert(&db->aModule,zCopy,(void*)pMod);
assert( pDel==0 || pDel==pMod );
if( pDel ){
sqlite3OomFault(db);
sqlite3DbFree(db, pDel);
}
}
return pMod;
}
/*
** The actual function that does the work of creating a new module.
|
> |
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 |
pMod->xDestroy = xDestroy;
pMod->pEpoTab = 0;
pDel = (Module *)sqlite3HashInsert(&db->aModule,zCopy,(void*)pMod);
assert( pDel==0 || pDel==pMod );
if( pDel ){
sqlite3OomFault(db);
sqlite3DbFree(db, pDel);
pMod = 0;
}
}
return pMod;
}
/*
** The actual function that does the work of creating a new module.
|