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Refactor the way that DEFAULT expressions are stored on columns, in order

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to save memory in the common case where the column has no DEFAULT clause.

FossilOrigin-Name: 8646547e54211d44c415663c33775c4268550f8332949c4731a4bb6ec9cc663a
This commit is contained in:
drh
2021-07-31 20:30:41 +00:00
parent c2df4d6adb
commit 79cf2b7120
11 changed files with 126 additions and 62 deletions
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src/vtab.c
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@@ -829,10 +829,12 @@ int sqlite3_declare_vtab(sqlite3 *db, const char *zCreateTable){
Table *pNew = sParse.pNewTable;
Index *pIdx;
pTab->aCol = pNew->aCol;
pTab->pDfltList = pNew->pDfltList;
pTab->nNVCol = pTab->nCol = pNew->nCol;
pTab->tabFlags |= pNew->tabFlags & (TF_WithoutRowid|TF_NoVisibleRowid);
pNew->nCol = 0;
pNew->aCol = 0;
pNew->pDfltList = 0;
assert( pTab->pIndex==0 );
assert( HasRowid(pNew) || sqlite3PrimaryKeyIndex(pNew)!=0 );
if( !HasRowid(pNew)