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Add the SQLITE_DBCONFIG_ENABLE_QPSG option to activate the query planner

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stability guarantee.  This involves refactoring the sqlite3.flags bitvector
to carve out a free bit to use.

FossilOrigin-Name: 7076e8283ebae1b45a5d85d9538b49b6da399d38c3c6935de100f948f814f6a9
This commit is contained in:
drh
2017-06-26 13:57:49 +00:00
parent a22dd3860a
commit 169dd928c5
15 changed files with 160 additions and 65 deletions
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4
src/main.c
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@@ -811,6 +811,7 @@ int sqlite3_db_config(sqlite3 *db, int op, ...){
{ SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER, SQLITE_Fts3Tokenizer },
{ SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, SQLITE_LoadExtension },
{ SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE, SQLITE_NoCkptOnClose },
{ SQLITE_DBCONFIG_ENABLE_QPSG, SQLITE_EnableQPSG },
};
unsigned int i;
rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
@@ -2915,6 +2916,9 @@ static int openDatabase(
#endif
#if defined(SQLITE_ENABLE_FTS3_TOKENIZER)
| SQLITE_Fts3Tokenizer
#endif
#if defined(SQLITE_ENABLE_QPSG)
| SQLITE_EnableQPSG
#endif
;
sqlite3HashInit(&db->aCollSeq);