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Overview
| Comment: | Mark a single branch within sqlite3SelectExpand() as an optimization. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
3a4ffb21d0ee2326c31b9ddc512d79d4 |
| User & Date: | drh 2017-10-02 23:50:08 |
References
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2017-10-03
| ||
| 14:24 | The simplification to sqlite3SelectExpand() in last night's [3a4ffb21] check-in was not completely correct. This adjustment is needed for correct OOM handling in some configurations. (check-in: c5ad5e16 user: drh tags: trunk) | |
Context
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2017-10-03
| ||
| 03:01 | Do not compute column and row size estimates for the transient Table objects associated with the result set of a SELECT statement, since those estimates are never used for anything constructive. (check-in: e4342fd4 user: drh tags: trunk) | |
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2017-10-02
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| 23:50 | Mark a single branch within sqlite3SelectExpand() as an optimization. (check-in: 3a4ffb21 user: drh tags: trunk) | |
| 23:30 | Simplification to sqlite3SelectPrep() for improved testability. (check-in: 5bf2ccb9 user: drh tags: trunk) | |
Changes
Changes to src/select.c.
4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 |
** The calling function can detect the problem by looking at pParse->nErr
** and/or pParse->db->mallocFailed.
*/
static void sqlite3SelectExpand(Parse *pParse, Select *pSelect){
Walker w;
w.xExprCallback = sqlite3ExprWalkNoop;
w.pParse = pParse;
if( pParse->hasCompound ){
w.xSelectCallback = convertCompoundSelectToSubquery;
w.xSelectCallback2 = 0;
sqlite3WalkSelect(&w, pSelect);
}
w.xSelectCallback = selectExpander;
w.xSelectCallback2 = selectPopWith;
sqlite3WalkSelect(&w, pSelect);
|
| |
4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 |
** The calling function can detect the problem by looking at pParse->nErr
** and/or pParse->db->mallocFailed.
*/
static void sqlite3SelectExpand(Parse *pParse, Select *pSelect){
Walker w;
w.xExprCallback = sqlite3ExprWalkNoop;
w.pParse = pParse;
if( OK_IF_ALWAYS_TRUE(pParse->hasCompound) ){
w.xSelectCallback = convertCompoundSelectToSubquery;
w.xSelectCallback2 = 0;
sqlite3WalkSelect(&w, pSelect);
}
w.xSelectCallback = selectExpander;
w.xSelectCallback2 = selectPopWith;
sqlite3WalkSelect(&w, pSelect);
|