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Avoid many unnecessary calls to sqlite3ReadSchema() and sqlite3Init() when

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the schema is known to be valid already.

FossilOrigin-Name: 58cf812fd81329e82b3fdd61b7ad2040c9b90d2d80f592b9231e0e1902c8d577
This commit is contained in:
drh
2018-04-25 12:01:45 +00:00
parent 3215872446
commit b2c8559fad
7 changed files with 35 additions and 26 deletions
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3
src/sqliteInt.h
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@@ -1362,7 +1362,7 @@ struct sqlite3 {
u8 vtabOnConflict; /* Value to return for s3_vtab_on_conflict() */
u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */
u8 mTrace; /* zero or more SQLITE_TRACE flags */
u8 skipBtreeMutex; /* True if no shared-cache backends */
u8 noSharedCache; /* True if no shared-cache backends */
u8 nSqlExec; /* Number of pending OP_SqlExec opcodes */
int nextPagesize; /* Pagesize after VACUUM if >0 */
u32 magic; /* Magic number for detect library misuse */
@@ -1522,6 +1522,7 @@ struct sqlite3 {
#define DBFLAG_SchemaChange 0x0001 /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin 0x0002 /* Preference to built-in funcs */
#define DBFLAG_Vacuum 0x0004 /* Currently in a VACUUM */
#define DBFLAG_SchemaKnownOk 0x0008 /* Schema is known to be valid */
/*
** Bits of the sqlite3.dbOptFlags field that are used by the