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Add support for the sqlite3_txn_state() interface.

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FossilOrigin-Name: ad195e3dd89d0f33b50070c18fb8f43c4eb24162515dfdd7c04d9e7d96b902a2
This commit is contained in:
drh
2020-08-25 19:09:07 +00:00
parent 58d6f633ba
commit 99744fa4ab
16 changed files with 215 additions and 53 deletions
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54
src/sqlite.h.in
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@@ -6186,6 +6186,57 @@ const char *sqlite3_db_filename(sqlite3 *db, const char *zDbName);
*/
int sqlite3_db_readonly(sqlite3 *db, const char *zDbName);
/*
** CAPI3REF: Determine the transaction state of a database
** METHOD: sqlite3
**
** ^The sqlite3_txn_state(D,S) interface returns the current
** [transaction state] of schema S in database connection D. ^If S is NULL,
** then the highest transaction state of any schema on databse connection D
** is returned. Transaction states are (in order of lowest to highest):
** <ol>
** <li value="0"> SQLITE_TXN_NONE
** <li value="1"> SQLITE_TXN_READ
** <li value="2"> SQLITE_TXN_WRITE
** </ol>
** ^If the S argument to sqlite3_txn_state(D,S) is in the name of
** a valid schema, then -1 is returned.
*/
int sqlite3_txn_state(sqlite3*,const char *zSchema);
/*
** CAPI3REF: Allowed return values from [sqlite3_txn_state()]
** KEYWORDS: {transaction state}
**
** These constants define the current transaction state of a database file.
** ^The [sqlite3_txn_state(D,S)] interface returns one of these
** constants in order to describe the transaction state of schema S
** in [database connection] D.
**
** <dl>
** [[SQLITE_TXN_NONE]] <dt>SQLITE_TXN_NONE</dt>
** <dd>The SQLITE_TXN_NONE state means that no transaction is currently
** pending.</dd>
**
** [[SQLITE_TXN_READ]] <dt>SQLITE_TXN_READ</dt>
** <dd>The SQLITE_TXN_READ state means that the database is currently
** in a read transaction. Content has been read from the database file
** but nothing in the database file has changed. The transaction state
** will advanced to SQLITE_TXN_WRITE if any changes occur and there are
** no other conflicting concurrent write transactions. The transaction
** state will revert to SQLITE_TXN_NONE following a [ROLLBACK] or
** [COMMIT].</dd>
**
** [[SQLITE_TXN_WRITE]] <dt>SQLITE_TXN_WRITE</dt>
** <dd>The SQLITE_TXN_WRITE state means that the database is currently
** in a write transaction. Content has been written to the database file
** but has not yet committed. The transaction state will change to
** to SQLITE_TXN_NONE at the next [ROLLBACK] or [COMMIT].</dd>
*/
#define SQLITE_TXN_NONE 0
#define SQLITE_TXN_READ 1
#define SQLITE_TXN_WRITE 2
/*
** CAPI3REF: Find the next prepared statement
** METHOD: sqlite3
@@ -9345,6 +9396,7 @@ void sqlite3_stmt_scanstatus_reset(sqlite3_stmt*);
/*
** CAPI3REF: Flush caches to disk mid-transaction
** METHOD: sqlite3
**
** ^If a write-transaction is open on [database connection] D when the
** [sqlite3_db_cacheflush(D)] interface invoked, any dirty
@@ -9377,6 +9429,7 @@ int sqlite3_db_cacheflush(sqlite3*);
/*
** CAPI3REF: The pre-update hook.
** METHOD: sqlite3
**
** ^These interfaces are only available if SQLite is compiled using the
** [SQLITE_ENABLE_PREUPDATE_HOOK] compile-time option.
@@ -9479,6 +9532,7 @@ int sqlite3_preupdate_new(sqlite3 *, int, sqlite3_value **);
/*
** CAPI3REF: Low-level system error code
** METHOD: sqlite3
**
** ^Attempt to return the underlying operating system error code or error
** number that caused the most recent I/O error or failure to open a file.