SQLITE_PREPARE_PERSISTENT
,
SQLITE_PREPARE_NORMALIZE
—
Prepare Flags
#define SQLITE_PREPARE_PERSISTENT
#define SQLITE_PREPARE_NORMALIZE
These constants define various flags that can be passed into
"prepFlags" parameter of the sqlite3_prepare_v3() and
sqlite3_prepare16_v3() interfaces.
New flags may be added in future releases of SQLite.
- SQLITE_PREPARE_PERSISTENT
- The SQLITE_PREPARE_PERSISTENT flag is a hint to the query planner that the
prepared statement will be retained for a long time and probably reused
many times. Without this flag, sqlite3_prepare_v3() and
sqlite3_prepare16_v3() assume that the prepared statement will be used
just once or at most a few times and then destroyed using
sqlite3_finalize() relatively soon. The current implementation acts on
this hint by avoiding the use of lookaside memory so as not to deplete the
limited store of lookaside memory. Future versions of SQLite may act on
this hint differently.
- SQLITE_PREPARE_NORMALIZE
- The SQLITE_PREPARE_NORMALIZE flag indicates that a normalized
representation of the SQL statement should be calculated and then
associated with the prepared statement, which can be obtained via the
sqlite3_normalized_sql() interface. The semantics used to normalize a SQL
statement are unspecified and subject to change. At a minimum, literal
values will be replaced with suitable placeholders.