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sqlite3源码,适合作为嵌入式（embedded）

<table width="100%" cellpadding="5"><tr><td valign="top"><ul><li><a href="#sqlite3">sqlite3</a></li><li><a href="#sqlite3_blob">sqlite3_blob</a></li><li><a href="#sqlite3_context">sqlite3_context</a></li><li><a href="#sqlite3_file">sqlite3_file</a></li><li><a href="#sqlite3_int64">sqlite3_int64</a></li><li><a href="#sqlite3_int64">sqlite3_uint64</a></li><li><a href="#sqlite3_int64">sqlite_int64</a></li></ul></td><td valign="top"><ul><li><a href="#sqlite3_int64">sqlite_uint64</a></li><li><a href="#sqlite3_io_methods">sqlite3_io_methods</a></li><li><a href="#sqlite3_mem_methods">sqlite3_mem_methods</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_module">sqlite3_module</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_mutex">sqlite3_mutex</a></li><li><a href="#sqlite3_mutex_methods">sqlite3_mutex_methods</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_pcache">sqlite3_pcache</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li></ul></td><td valign="top"><ul><li><a href="#sqlite3_pcache_methods">sqlite3_pcache_methods</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_stmt">sqlite3_stmt</a></li><li><a href="#sqlite3_temp_directory">sqlite3_temp_directory</a></li><li><a href="#sqlite3_value">sqlite3_value</a></li><li><a href="#sqlite3_vfs">sqlite3_vfs</a></li><li><a href="#sqlite3_vtab">sqlite3_vtab</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_vtab_cursor">sqlite3_vtab_cursor</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li></ul></td></tr></table><hr>
<h2>Constants:</h2>
<p>Note: Constants marked with "<a href="capi3ref.html"><small><i>(exp)</i></small></a>"
are <a href="capi3ref.html">experimental</a> and constants marked with
"<a href="capi3ref.html"><small><i>(obs)</i></small></a>" are <a href="capi3ref.html">deprecated</a></p>
<table width="100%" cellpadding="5"><tr><td valign="top"><ul><li><a href="#SQLITE_ABORT">SQLITE_ABORT</a></li><li><a href="#SQLITE_ACCESS_EXISTS">SQLITE_ACCESS_EXISTS</a></li><li><a href="#SQLITE_ACCESS_EXISTS">SQLITE_ACCESS_READ</a></li><li><a href="#SQLITE_ACCESS_EXISTS">SQLITE_ACCESS_READWRITE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_ALTER_TABLE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_ANALYZE</a></li><li><a href="#SQLITE_ANY">SQLITE_ANY</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_ATTACH</a></li><li><a href="#SQLITE_ABORT">SQLITE_AUTH</a></li><li><a href="#SQLITE_BLOB">SQLITE_BLOB</a></li><li><a href="#SQLITE_ABORT">SQLITE_BUSY</a></li><li><a href="#SQLITE_ABORT">SQLITE_CANTOPEN</a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_GETMALLOC</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_GETMUTEX</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_GETPCACHE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_HEAP</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_LOOKASIDE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_MALLOC</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_MEMSTATUS</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_MULTITHREAD</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_MUTEX</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_PAGECACHE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_PCACHE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_SCRATCH</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_SERIALIZED</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_CONFIG_GETMALLOC">SQLITE_CONFIG_SINGLETHREAD</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_ABORT">SQLITE_CONSTRAINT</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_COPY</a></li><li><a href="#SQLITE_ABORT">SQLITE_CORRUPT</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_INDEX</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_TABLE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_TEMP_INDEX</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_TEMP_TABLE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_TEMP_TRIGGER</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_TEMP_VIEW</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_TRIGGER</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_VIEW</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_CREATE_VTABLE</a></li><li><a href="#SQLITE_DBCONFIG_LOOKASIDE">SQLITE_DBCONFIG_LOOKASIDE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_DBSTATUS_LOOKASIDE_USED">SQLITE_DBSTATUS_LOOKASIDE_USED</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DELETE</a></li><li><a href="#SQLITE_DENY">SQLITE_DENY</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DETACH</a></li><li><a href="#SQLITE_ABORT">SQLITE_DONE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_INDEX</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_TABLE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_TEMP_INDEX</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_TEMP_TABLE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_TEMP_TRIGGER</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_TEMP_VIEW</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_TRIGGER</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_VIEW</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_DROP_VTABLE</a></li><li><a href="#SQLITE_ABORT">SQLITE_EMPTY</a></li><li><a href="#SQLITE_ABORT">SQLITE_ERROR</a></li><li><a href="#SQLITE_FCNTL_LOCKSTATE">SQLITE_FCNTL_LOCKSTATE</a></li><li><a href="#SQLITE_BLOB">SQLITE_FLOAT</a></li><li><a href="#SQLITE_ABORT">SQLITE_FORMAT</a></li><li><a href="#SQLITE_ABORT">SQLITE_FULL</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_FUNCTION</a></li><li><a href="#SQLITE_FCNTL_LOCKSTATE">SQLITE_GET_LOCKPROXYFILE</a></li><li><a href="#SQLITE_DENY">SQLITE_IGNORE</a></li><li><a href="#SQLITE_INDEX_CONSTRAINT_EQ">SQLITE_INDEX_CONSTRAINT_EQ</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_INDEX_CONSTRAINT_EQ">SQLITE_INDEX_CONSTRAINT_GE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_INDEX_CONSTRAINT_EQ">SQLITE_INDEX_CONSTRAINT_GT</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_INDEX_CONSTRAINT_EQ">SQLITE_INDEX_CONSTRAINT_LE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_INDEX_CONSTRAINT_EQ">SQLITE_INDEX_CONSTRAINT_LT</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_INDEX_CONSTRAINT_EQ">SQLITE_INDEX_CONSTRAINT_MATCH</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_INSERT</a></li><li><a href="#SQLITE_BLOB">SQLITE_INTEGER</a></li><li><a href="#SQLITE_ABORT">SQLITE_INTERNAL</a></li><li><a href="#SQLITE_ABORT">SQLITE_INTERRUPT</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC16K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC1K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC2K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC32K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC4K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC512</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC64K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC8K</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_SAFE_APPEND</a></li><li><a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_SEQUENTIAL</a></li><li><a href="#SQLITE_ABORT">SQLITE_IOERR</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_ACCESS</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_BLOCKED</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_CHECKRESERVEDLOCK</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_CLOSE</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_DELETE</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_DIR_CLOSE</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_DIR_FSYNC</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_FSTAT</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_FSYNC</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_LOCK</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_NOMEM</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_RDLOCK</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_READ</a></li></ul></td><td valign="top"><ul><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_SHORT_READ</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_TRUNCATE</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_UNLOCK</a></li><li><a href="#SQLITE_IOERR_ACCESS">SQLITE_IOERR_WRITE</a></li><li><a href="#SQLITE_FCNTL_LOCKSTATE">SQLITE_LAST_ERRNO</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_ATTACHED</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_COLUMN</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_COMPOUND_SELECT</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_EXPR_DEPTH</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_FUNCTION_ARG</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_LENGTH</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_LIKE_PATTERN_LENGTH</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_SQL_LENGTH</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_VARIABLE_NUMBER</a></li><li><a href="#SQLITE_LIMIT_ATTACHED">SQLITE_LIMIT_VDBE_OP</a></li><li><a href="#SQLITE_ABORT">SQLITE_LOCKED</a></li><li><a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_EXCLUSIVE</a></li><li><a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_NONE</a></li><li><a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_PENDING</a></li><li><a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_RESERVED</a></li><li><a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_SHARED</a></li><li><a href="#SQLITE_ABORT">SQLITE_MISMATCH</a></li><li><a href="#SQLITE_ABORT">SQLITE_MISUSE</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_FAST</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_RECURSIVE</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_STATIC_LRU</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_STATIC_LRU2</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_STATIC_MASTER</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_STATIC_MEM</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_STATIC_MEM2</a></li><li><a href="#SQLITE_MUTEX_FAST">SQLITE_MUTEX_STATIC_PRNG</a></li><li><a href="#SQLITE_ABORT">SQLITE_NOLFS</a></li><li><a href="#SQLITE_ABORT">SQLITE_NOMEM</a></li><li><a href="#SQLITE_ABORT">SQLITE_NOTADB</a></li><li><a href="#SQLITE_ABORT">SQLITE_NOTFOUND</a></li><li><a href="#SQLITE_BLOB">SQLITE_NULL</a></li><li><a href="#SQLITE_ABORT">SQLITE_OK</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_CREATE</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_DELETEONCLOSE</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_EXCLUSIVE</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_FULLMUTEX</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_MAIN_DB</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_MAIN_JOURNAL</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_MASTER_JOURNAL</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_NOMUTEX</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_READONLY</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_READWRITE</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_SUBJOURNAL</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_TEMP_DB</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_TEMP_JOURNAL</a></li><li><a href="#SQLITE_OPEN_CREATE">SQLITE_OPEN_TRANSIENT_DB</a></li><li><a href="#SQLITE_ABORT">SQLITE_PERM</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_PRAGMA</a></li><li><a href="#SQLITE_ABORT">SQLITE_PROTOCOL</a></li><li><a href="#SQLITE_ABORT">SQLITE_RANGE</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_READ</a></li><li><a href="#SQLITE_ABORT">SQLITE_READONLY</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_REINDEX</a></li><li><a href="#SQLITE_ABORT">SQLITE_ROW</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_SAVEPOINT</a></li><li><a href="#SQLITE_ABORT">SQLITE_SCHEMA</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_SELECT</a></li><li><a href="#SQLITE_FCNTL_LOCKSTATE">SQLITE_SET_LOCKPROXYFILE</a></li><li><a href="#SQLITE_STATIC">SQLITE_STATIC</a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_MALLOC_SIZE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_MEMORY_USED</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_PAGECACHE_OVERFLOW</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_PAGECACHE_SIZE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_PAGECACHE_USED</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_PARSER_STACK</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_SCRATCH_OVERFLOW</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_SCRATCH_SIZE</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STATUS_MALLOC_SIZE">SQLITE_STATUS_SCRATCH_USED</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STMTSTATUS_FULLSCAN_STEP">SQLITE_STMTSTATUS_FULLSCAN_STEP</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_STMTSTATUS_FULLSCAN_STEP">SQLITE_STMTSTATUS_SORT</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#SQLITE_SYNC_DATAONLY">SQLITE_SYNC_DATAONLY</a></li><li><a href="#SQLITE_SYNC_DATAONLY">SQLITE_SYNC_FULL</a></li><li><a href="#SQLITE_SYNC_DATAONLY">SQLITE_SYNC_NORMAL</a></li><li><a href="#SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS">SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS</a></li><li><a href="#SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS">SQLITE_TESTCTRL_BITVEC_TEST</a></li><li><a href="#SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS">SQLITE_TESTCTRL_FAULT_INSTALL</a></li><li><a href="#SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS">SQLITE_TESTCTRL_PRNG_RESET</a></li><li><a href="#SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS">SQLITE_TESTCTRL_PRNG_RESTORE</a></li><li><a href="#SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS">SQLITE_TESTCTRL_PRNG_SAVE</a></li><li><a href="#SQLITE_BLOB">SQLITE_TEXT</a></li><li><a href="#SQLITE_ABORT">SQLITE_TOOBIG</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_TRANSACTION</a></li><li><a href="#SQLITE_STATIC">SQLITE_TRANSIENT</a></li><li><a href="#SQLITE_ALTER_TABLE">SQLITE_UPDATE</a></li><li><a href="#SQLITE_ANY">SQLITE_UTF16</a></li><li><a href="#SQLITE_ANY">SQLITE_UTF16BE</a></li><li><a href="#SQLITE_ANY">SQLITE_UTF16LE</a></li><li><a href="#SQLITE_ANY">SQLITE_UTF16_ALIGNED</a></li><li><a href="#SQLITE_ANY">SQLITE_UTF8</a></li><li><a href="#SQLITE_VERSION">SQLITE_VERSION</a></li><li><a href="#SQLITE_VERSION">SQLITE_VERSION_NUMBER</a></li></ul></td></tr></table><hr>
<h2>Functions:</h2>
<p>Note: Functions marked with "<a href="capi3ref.html"><small><i>(exp)</i></small></a>"
are <a href="capi3ref.html">experimental</a> and functions marked with
<a href="capi3ref.html"><small><i>(obs)</i></small></a> are <a href="capi3ref.html">deprecated</a>.</p>
<table width="100%" cellpadding="5"><tr><td valign="top"><ul><li><a href="#sqlite3_aggregate_context">sqlite3_aggregate_context</a></li><li><a href="#sqlite3_aggregate_count">sqlite3_aggregate_count</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(obs)</i></small></a></li><li><a href="#sqlite3_auto_extension">sqlite3_auto_extension</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_blob</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_double</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_int</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_int64</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_null</a></li><li><a href="#sqlite3_bind_parameter_count">sqlite3_bind_parameter_count</a></li><li><a href="#sqlite3_bind_parameter_index">sqlite3_bind_parameter_index</a></li><li><a href="#sqlite3_bind_parameter_name">sqlite3_bind_parameter_name</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_text</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_text16</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_value</a></li><li><a href="#sqlite3_bind_blob">sqlite3_bind_zeroblob</a></li><li><a href="#sqlite3_blob_bytes">sqlite3_blob_bytes</a></li><li><a href="#sqlite3_blob_close">sqlite3_blob_close</a></li><li><a href="#sqlite3_blob_open">sqlite3_blob_open</a></li><li><a href="#sqlite3_blob_read">sqlite3_blob_read</a></li><li><a href="#sqlite3_blob_write">sqlite3_blob_write</a></li><li><a href="#sqlite3_busy_handler">sqlite3_busy_handler</a></li><li><a href="#sqlite3_busy_timeout">sqlite3_busy_timeout</a></li><li><a href="#sqlite3_changes">sqlite3_changes</a></li><li><a href="#sqlite3_clear_bindings">sqlite3_clear_bindings</a></li><li><a href="#sqlite3_close">sqlite3_close</a></li><li><a href="#sqlite3_collation_needed">sqlite3_collation_needed</a></li><li><a href="#sqlite3_collation_needed">sqlite3_collation_needed16</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_blob</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_bytes</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_bytes16</a></li><li><a href="#sqlite3_column_count">sqlite3_column_count</a></li><li><a href="#sqlite3_column_database_name">sqlite3_column_database_name</a></li><li><a href="#sqlite3_column_database_name">sqlite3_column_database_name16</a></li><li><a href="#sqlite3_column_decltype">sqlite3_column_decltype</a></li><li><a href="#sqlite3_column_decltype">sqlite3_column_decltype16</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_double</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_int</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_int64</a></li><li><a href="#sqlite3_column_name">sqlite3_column_name</a></li><li><a href="#sqlite3_column_name">sqlite3_column_name16</a></li><li><a href="#sqlite3_column_database_name">sqlite3_column_origin_name</a></li><li><a href="#sqlite3_column_database_name">sqlite3_column_origin_name16</a></li><li><a href="#sqlite3_column_database_name">sqlite3_column_table_name</a></li><li><a href="#sqlite3_column_database_name">sqlite3_column_table_name16</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_text</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_text16</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_type</a></li><li><a href="#sqlite3_column_blob">sqlite3_column_value</a></li><li><a href="#sqlite3_commit_hook">sqlite3_commit_hook</a></li><li><a href="#sqlite3_complete">sqlite3_complete</a></li><li><a href="#sqlite3_complete">sqlite3_complete16</a></li><li><a href="#sqlite3_config">sqlite3_config</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_context_db_handle">sqlite3_context_db_handle</a></li><li><a href="#sqlite3_create_collation">sqlite3_create_collation</a></li><li><a href="#sqlite3_create_collation">sqlite3_create_collation16</a></li><li><a href="#sqlite3_create_collation">sqlite3_create_collation_v2</a></li><li><a href="#sqlite3_create_function">sqlite3_create_function</a></li><li><a href="#sqlite3_create_function">sqlite3_create_function16</a></li></ul></td><td valign="top"><ul><li><a href="#sqlite3_create_module">sqlite3_create_module</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_create_module_v2">sqlite3_create_module_v2</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_data_count">sqlite3_data_count</a></li><li><a href="#sqlite3_db_config">sqlite3_db_config</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_db_handle">sqlite3_db_handle</a></li><li><a href="#sqlite3_db_mutex">sqlite3_db_mutex</a></li><li><a href="#sqlite3_db_status">sqlite3_db_status</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_declare_vtab">sqlite3_declare_vtab</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_enable_load_extension">sqlite3_enable_load_extension</a></li><li><a href="#sqlite3_enable_shared_cache">sqlite3_enable_shared_cache</a></li><li><a href="#sqlite3_errcode">sqlite3_errcode</a></li><li><a href="#sqlite3_errcode">sqlite3_errmsg</a></li><li><a href="#sqlite3_errcode">sqlite3_errmsg16</a></li><li><a href="#sqlite3_exec">sqlite3_exec</a></li><li><a href="#sqlite3_aggregate_count">sqlite3_expired</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(obs)</i></small></a></li><li><a href="#sqlite3_errcode">sqlite3_extended_errcode</a></li><li><a href="#sqlite3_extended_result_codes">sqlite3_extended_result_codes</a></li><li><a href="#sqlite3_file_control">sqlite3_file_control</a></li><li><a href="#sqlite3_finalize">sqlite3_finalize</a></li><li><a href="#sqlite3_free">sqlite3_free</a></li><li><a href="#sqlite3_free_table">sqlite3_free_table</a></li><li><a href="#sqlite3_get_autocommit">sqlite3_get_autocommit</a></li><li><a href="#sqlite3_get_auxdata">sqlite3_get_auxdata</a></li><li><a href="#sqlite3_free_table">sqlite3_get_table</a></li><li><a href="#sqlite3_aggregate_count">sqlite3_global_recover</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(obs)</i></small></a></li><li><a href="#sqlite3_initialize">sqlite3_initialize</a></li><li><a href="#sqlite3_interrupt">sqlite3_interrupt</a></li><li><a href="#sqlite3_last_insert_rowid">sqlite3_last_insert_rowid</a></li><li><a href="#sqlite3_libversion">sqlite3_libversion</a></li><li><a href="#sqlite3_libversion">sqlite3_libversion_number</a></li><li><a href="#sqlite3_limit">sqlite3_limit</a></li><li><a href="#sqlite3_load_extension">sqlite3_load_extension</a></li><li><a href="#sqlite3_free">sqlite3_malloc</a></li><li><a href="#sqlite3_aggregate_count">sqlite3_memory_alarm</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(obs)</i></small></a></li><li><a href="#sqlite3_memory_highwater">sqlite3_memory_highwater</a></li><li><a href="#sqlite3_memory_highwater">sqlite3_memory_used</a></li><li><a href="#sqlite3_mprintf">sqlite3_mprintf</a></li><li><a href="#sqlite3_mutex_alloc">sqlite3_mutex_alloc</a></li><li><a href="#sqlite3_mutex_alloc">sqlite3_mutex_enter</a></li><li><a href="#sqlite3_mutex_alloc">sqlite3_mutex_free</a></li><li><a href="#sqlite3_mutex_held">sqlite3_mutex_held</a></li><li><a href="#sqlite3_mutex_alloc">sqlite3_mutex_leave</a></li><li><a href="#sqlite3_mutex_held">sqlite3_mutex_notheld</a></li><li><a href="#sqlite3_mutex_alloc">sqlite3_mutex_try</a></li><li><a href="#sqlite3_next_stmt">sqlite3_next_stmt</a></li><li><a href="#sqlite3_open">sqlite3_open</a></li><li><a href="#sqlite3_open">sqlite3_open16</a></li><li><a href="#sqlite3_open">sqlite3_open_v2</a></li><li><a href="#sqlite3_initialize">sqlite3_os_end</a></li><li><a href="#sqlite3_initialize">sqlite3_os_init</a></li><li><a href="#sqlite3_overload_function">sqlite3_overload_function</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_prepare">sqlite3_prepare</a></li><li><a href="#sqlite3_prepare">sqlite3_prepare16</a></li><li><a href="#sqlite3_prepare">sqlite3_prepare16_v2</a></li><li><a href="#sqlite3_prepare">sqlite3_prepare_v2</a></li><li><a href="#sqlite3_profile">sqlite3_profile</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_progress_handler">sqlite3_progress_handler</a></li><li><a href="#sqlite3_randomness">sqlite3_randomness</a></li></ul></td><td valign="top"><ul><li><a href="#sqlite3_free">sqlite3_realloc</a></li><li><a href="#sqlite3_release_memory">sqlite3_release_memory</a></li><li><a href="#sqlite3_reset">sqlite3_reset</a></li><li><a href="#sqlite3_reset_auto_extension">sqlite3_reset_auto_extension</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_blob</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_double</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_error</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_error16</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_error_code</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_error_nomem</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_error_toobig</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_int</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_int64</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_null</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_text</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_text16</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_text16be</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_text16le</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_value</a></li><li><a href="#sqlite3_result_blob">sqlite3_result_zeroblob</a></li><li><a href="#sqlite3_commit_hook">sqlite3_rollback_hook</a></li><li><a href="#sqlite3_set_authorizer">sqlite3_set_authorizer</a></li><li><a href="#sqlite3_get_auxdata">sqlite3_set_auxdata</a></li><li><a href="#sqlite3_initialize">sqlite3_shutdown</a></li><li><a href="#sqlite3_sleep">sqlite3_sleep</a></li><li><a href="#sqlite3_mprintf">sqlite3_snprintf</a></li><li><a href="#sqlite3_soft_heap_limit">sqlite3_soft_heap_limit</a></li><li><a href="#sqlite3_sql">sqlite3_sql</a></li><li><a href="#sqlite3_status">sqlite3_status</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_step">sqlite3_step</a></li><li><a href="#sqlite3_stmt_status">sqlite3_stmt_status</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_table_column_metadata">sqlite3_table_column_metadata</a></li><li><a href="#sqlite3_test_control">sqlite3_test_control</a></li><li><a href="#sqlite3_aggregate_count">sqlite3_thread_cleanup</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(obs)</i></small></a></li><li><a href="#sqlite3_threadsafe">sqlite3_threadsafe</a></li><li><a href="#sqlite3_total_changes">sqlite3_total_changes</a></li><li><a href="#sqlite3_profile">sqlite3_trace</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(exp)</i></small></a></li><li><a href="#sqlite3_aggregate_count">sqlite3_transfer_bindings</a>&nbsp;&nbsp;<a href="capi3ref.html"><small><i>(obs)</i></small></a></li><li><a href="#sqlite3_update_hook">sqlite3_update_hook</a></li><li><a href="#sqlite3_user_data">sqlite3_user_data</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_blob</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_bytes</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_bytes16</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_double</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_int</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_int64</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_numeric_type</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_text</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_text16</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_text16be</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_text16le</a></li><li><a href="#sqlite3_value_blob">sqlite3_value_type</a></li><li><a href="#sqlite3_libversion">sqlite3_version</a></li><li><a href="#sqlite3_vfs_find">sqlite3_vfs_find</a></li><li><a href="#sqlite3_vfs_find">sqlite3_vfs_register</a></li><li><a href="#sqlite3_vfs_find">sqlite3_vfs_unregister</a></li><li><a href="#sqlite3_mprintf">sqlite3_vmprintf</a></li></ul></td></tr></table><hr><a name="SQLITE_DBCONFIG_LOOKASIDE"></a>
<h2>Configuration Options</h2><blockquote><pre>#define SQLITE_DBCONFIG_LOOKASIDE    1001  /* void* int int */
</pre></blockquote><p><b>Important:</b> This interface is <a href="capi3ref.html">experimental</a> and is subject to change without notice.</p><p>
These constants are the available integer configuration options that
can be passed as the second argument to the <a href="#sqlite3_db_config">sqlite3_db_config()</a> interface.</p>

<p>New configuration options may be added in future releases of SQLite.
Existing configuration options might be discontinued.  Applications
should check the return code from <a href="#sqlite3_db_config">sqlite3_db_config()</a> to make sure that
the call worked.  The <a href="#sqlite3_db_config">sqlite3_db_config()</a> interface will return a
non-zero <a href="#SQLITE_ABORT">error code</a> if a discontinued or unsupported configuration option
is invoked.</p>

<p><dl>
<dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
<dd>This option takes three additional arguments that determine the
<a href="malloc.html#lookaside">lookaside memory allocator</a> configuration for the <a href="#sqlite3">database connection</a>.
The first argument (the third parameter to <a href="#sqlite3_db_config">sqlite3_db_config()</a> is a
pointer to a memory buffer to use for lookaside memory.  The first
argument may be NULL in which case SQLite will allocate the lookaside
buffer itself using <a href="#sqlite3_free">sqlite3_malloc()</a>.  The second argument is the
size of each lookaside buffer slot and the third argument is the number of
slots.  The size of the buffer in the first argument must be greater than
or equal to the product of the second and third arguments.</dd></p>

<p></dl>
</p><hr><a name="SQLITE_DBSTATUS_LOOKASIDE_USED"></a>
<h2>Status Parameters for database connections</h2><blockquote><pre>#define SQLITE_DBSTATUS_LOOKASIDE_USED     0
</pre></blockquote><p><b>Important:</b> This interface is <a href="capi3ref.html">experimental</a> and is subject to change without notice.</p><p>
Status verbs for <a href="#sqlite3_db_status">sqlite3_db_status()</a>.</p>

<p><dl>
<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt>
<dd>This parameter returns the number of lookaside memory slots currently
checked out.</dd>
</dl>
</p><hr><a name="sqlite3_context"></a>
<h2>SQL Function Context Object</h2><blockquote><pre>typedef struct sqlite3_context sqlite3_context;
</pre></blockquote><p>
The context in which an SQL function executes is stored in an
sqlite3_context object.  A pointer to an sqlite3_context object
is always first parameter to <a href="#sqlite3_create_function">application-defined SQL functions</a>.
The application-defined SQL function implementation will pass this
pointer through into calls to <a href="#sqlite3_result_blob">sqlite3_result()</a>,
<a href="#sqlite3_aggregate_context">sqlite3_aggregate_context()</a>, <a href="#sqlite3_user_data">sqlite3_user_data()</a>,
<a href="#sqlite3_context_db_handle">sqlite3_context_db_handle()</a>, <a href="#sqlite3_get_auxdata">sqlite3_get_auxdata()</a>,
and/or <a href="#sqlite3_get_auxdata">sqlite3_set_auxdata()</a>.
</p><hr><a name="sqlite3_file"></a>
<h2>OS Interface Open File Handle</h2><blockquote><pre>typedef struct sqlite3_file sqlite3_file;
struct sqlite3_file {
  const struct sqlite3_io_methods *pMethods;  /* Methods for an open file */
};
</pre></blockquote><p>
An <a href="#sqlite3_file">sqlite3_file</a> object represents an open file in the OS
interface layer.  Individual OS interface implementations will
want to subclass this object by appending additional fields
for their own use.  The pMethods entry is a pointer to an
<a href="#sqlite3_io_methods">sqlite3_io_methods</a> object that defines methods for performing
I/O operations on the open file.
</p><hr><a name="sqlite3_io_methods"></a>
<h2>OS Interface File Virtual Methods Object</h2><blockquote><pre>typedef struct sqlite3_io_methods sqlite3_io_methods;
struct sqlite3_io_methods {
  int iVersion;
  int (*xClose)(sqlite3_file*);
  int (*xRead)(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst);
  int (*xWrite)(sqlite3_file*, const void*, int iAmt, sqlite3_int64 iOfst);
  int (*xTruncate)(sqlite3_file*, sqlite3_int64 size);
  int (*xSync)(sqlite3_file*, int flags);
  int (*xFileSize)(sqlite3_file*, sqlite3_int64 *pSize);
  int (*xLock)(sqlite3_file*, int);
  int (*xUnlock)(sqlite3_file*, int);
  int (*xCheckReservedLock)(sqlite3_file*, int *pResOut);
  int (*xFileControl)(sqlite3_file*, int op, void *pArg);
  int (*xSectorSize)(sqlite3_file*);
  int (*xDeviceCharacteristics)(sqlite3_file*);
  /* Additional methods may be added in future releases */
};
</pre></blockquote><p>
Every file opened by the <a href="#sqlite3_vfs">sqlite3_vfs</a> xOpen method populates an
<a href="#sqlite3_file">sqlite3_file</a> object (or, more commonly, a subclass of the
<a href="#sqlite3_file">sqlite3_file</a> object) with a pointer to an instance of this object.
This object defines the methods used to perform various operations
against the open file represented by the <a href="#sqlite3_file">sqlite3_file</a> object.</p>

<p>The flags argument to xSync may be one of <a href="#SQLITE_SYNC_DATAONLY">SQLITE_SYNC_NORMAL</a> or
<a href="#SQLITE_SYNC_DATAONLY">SQLITE_SYNC_FULL</a>.  The first choice is the normal fsync().
The second choice is a Mac OS X style fullsync.  The <a href="#SQLITE_SYNC_DATAONLY">SQLITE_SYNC_DATAONLY</a>
flag may be ORed in to indicate that only the data of the file
and not its inode needs to be synced.</p>

<p>The integer values to xLock() and xUnlock() are one of
<ul>
<li> <a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_NONE</a>,
<li> <a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_SHARED</a>,
<li> <a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_RESERVED</a>,
<li> <a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_PENDING</a>, or
<li> <a href="#SQLITE_LOCK_EXCLUSIVE">SQLITE_LOCK_EXCLUSIVE</a>.
</ul>
xLock() increases the lock. xUnlock() decreases the lock.
The xCheckReservedLock() method checks whether any database connection,
either in this process or in some other process, is holding a RESERVED,
PENDING, or EXCLUSIVE lock on the file.  It returns true
if such a lock exists and false otherwise.</p>

<p>The xFileControl() method is a generic interface that allows custom
VFS implementations to directly control an open file using the
<a href="#sqlite3_file_control">sqlite3_file_control()</a> interface.  The second "op" argument is an
integer opcode.  The third argument is a generic pointer intended to
point to a structure that may contain arguments or space in which to
write return values.  Potential uses for xFileControl() might be
functions to enable blocking locks with timeouts, to change the
locking strategy (for example to use dot-file locks), to inquire
about the status of a lock, or to break stale locks.  The SQLite
core reserves all opcodes less than 100 for its own use.
A <a href="#SQLITE_FCNTL_LOCKSTATE">list of opcodes</a> less than 100 is available.
Applications that define a custom xFileControl method should use opcodes
greater than 100 to avoid conflicts.</p>

<p>The xSectorSize() method returns the sector size of the
device that underlies the file.  The sector size is the
minimum write that can be performed without disturbing
other bytes in the file.  The xDeviceCharacteristics()
method returns a bit vector describing behaviors of the
underlying device:</p>

<p><ul>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC512</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC1K</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC2K</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC4K</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC8K</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC16K</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC32K</a>
<li> <a href="#SQLITE_IOCAP_ATOMIC">SQLITE_IOCAP_ATOMIC64K</a>