sqlite(3lua) - NetBSD Manual Pages

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SQLITE(3lua)                         LOCAL                        SQLITE(3lua)


NAME

     sqlite -- access SQLite3 files from Lua


SYNOPSIS

     local sqlite = require 'sqlite'

     err = sqlite.initialize()
     sqlite.shutdown()
     db, err = sqlite.open(file [, flags])
     version = sqlite.libversion()
     version = sqlite.libversion_number()
     id = sqlite.sourceid()

     err = sqlite.close(db)
     stmt, err = sqlite.prepare(db, sql)
     err = sqlite.exec(db, sql)
     err = sqlite.errcode(db)
     msg = sqlite.errmsg(db)
     res = sqlite.get_autocommit(db)
     res = sqlite.changes(db)

     err = sqlite.bind(stmt, pidx, value)
     count = sqlite.bind_parameter_count(stmt)
     pidx = sqlite.bind_parameter_index(stmt, name)
     name = sqlite.bind_parameter_name(stmt, pidx)
     err = sqlite.step(stmt)
     value = sqlite.column(stmt, cidx)
     sqlite.reset(stmt)
     sqlite.clear_bindings(stmt)
     sqlite.finalize(stmt)
     name = sqlite.column_name(stmt, cidx)
     count = sqlite.column_count(stmt)


DESCRIPTION

     The sqlite Lua binding provides access to SQLite3 files.


GENERAL FUNCTIONS

     err = sqlite.initialize()
           Initialize the SQLite3 library.  Workstation applications using
           SQLite normally do not need to invoke this function.

     sqlite.shutdown()
           Deallocate any resources that were allocated by
           sqlite.initialize().  Workstation applications using SQLite nor-
           mally do not need to invoke this function.

     db, err = sqlite.open(file [, flags])
           Open a database, optionally passing flags.  When called without
           flags, the database will be opened for reading and writing and it
           will be created if it does not yet exist.  The following flags are
           defined:

           sqlite.OPEN_READONLY
                 The database is opened in read-only mode.  If the database
                 does not already exist, an error is returned.

           sqlite.OPEN_READWRITE
                 The database is opened for reading and writing if possible,
                 or reading only if the file is write protected by the operat-
                 ing system.  In either case the database must already exist,
                 otherwise an error is returned.

           sqlite.OPEN_CREATE
                 The database is opened for reading and writing, and is cre-
                 ated if it does not already exist.

     version = sqlite.libversion()
           Return the SQLite3 library version number as a string.

     version = sqlite.libversion_number()
           Return the SQLite3 library version number as a number.

     id = sqlite.sourceid()
           Return the SQLite3 library source id as a string.


DATABASE FUNCTIONS

     Database functions operate on database objects returned by sqlite.open().

     err = sqlite.close(db)
           Close an open database.  Like with all remaining database func-
           tions, this function can also be called using the Lua "colon" syn-
           tactic sugar as db:close().

     stmt, err = sqlite.prepare(db, sql)
           Return a prepared statement.

     err = sqlite.exec(db, sql)
           Directly execute an SQL statement.  Be careful when creating SQL on
           the fly (SQL injection attacks).

     err = sqlite.errcode(db)
           Return the numeric error code.

     msg = sqlite.errmsg(db)
           Return the error message as a string.

     res = sqlite.get_autocommit(db)
           Return the autocommit flag.

     res = sqlite.changes(db)
           This function returns the number of database rows that were changed
           or inserted or deleted by the most recently completed SQL statement
           on the database.


STATEMENT FUNCTIONS

     err = sqlite.bind(stmt, pidx, value)
           Bind value to the parameter pidx in the prepared statement stmt.

     count = sqlite.bind_parameter_count(stmt)
           Return the number of parameters in the prepared statement stmt.

     pidx = sqlite.bind_parameter_index(stmt, name)
           Return the parameter index for name in the prepared statement stmt.

     name = sqlite.bind_parameter_name(stmt, pidx)
           Return the parameter name for the parameter index pidx in the pre-
           pared statement stmt.

     err = sqlite.step(stmt)
           Execute prepared statement stmt.

     value = sqlite.column(stmt, cidx)
           Return the value at column cidx in the prepared statement stmt.

     sqlite.reset(stmt)
           The sqlite.reset() function is called to reset a prepared statement
           object back to its initial state, ready to be re-executed.

     sqlite.clear_bindings(stmt)
           Contrary to the intuition of many, sqlite.reset() does not reset
           the bindings on a prepared statement.  Use this routine to reset
           all host parameters to NULL.

     sqlite.finalize(stmt)
           The sqlite.finalize() function is called to delete a prepared
           statement.

     name = sqlite.column_name(stmt, cidx)
           Return the name assigned to a particular column in the result set
           of a SELECT statement.

     count = sqlite.column_count(stmt)
           Return the number of columns in the result set returned by the pre-
           pared statement stmt.  This routine returns 0 if stmt is an SQL
           statement that does not return data (for example an UPDATE).


ERROR CODES

     Most functions return an error code, the following error codes are
     defined:

     sqlite.OK
           Successful result.

     sqlite.ERROR
           SQL error or missing database.

     sqlite.INTERNAL
           Internal logic error in SQLite.

     sqlite.PERM
           Access permission denied.

     sqlite.ABORT
           Callback routine requested an abort.

     sqlite.BUSY
           The database file is locked.

     sqlite.LOCKED
           A table in the database is locked.

     sqlite.NOMEM
           Out of memory.

     sqlite.READONLY
           Attempt to write a readonly database.

     sqlite.INTERRUPT
           Operation terminated by sqlite3_interrupt().

     sqlite.IOERR
           Some kind of disk I/O error occurred.

     sqlite.CORRUPT
           The database disk image is malformed.

     sqlite.NOTFOUND
           Unknown opcode in sqlite3_file_control().

     sqlite.FULL
           Insertion failed because database is full.

     sqlite.CANTOPEN
           Unable to open the database file.

     sqlite.PROTOCOL
           Database lock protocol error.

     sqlite.EMPTY
           Database is empty.

     sqlite.SCHEMA
           The database schema changed.

     sqlite.TOOBIG
           String or BLOB exceeds size limit.

     sqlite.CONSTRAINT
           Abort due to constraint violation.

     sqlite.MISMATCH
           Data type mismatch.

     sqlite.MISUSE
           Library used incorrectly.

     sqlite.NOLFS
           Uses OS features not supported on host.

     sqlite.AUTH
           Authorization denied.

     sqlite.FORMAT
           Auxiliary database format error.

     sqlite.RANGE
           2nd parameter to sqlite.bind() out of range.

     sqlite.NOTADB
           File opened that is not a database file.

     sqlite.ROW
           sqlite.step() has another row ready.

     sqlite.DONE
           sqlite.step() has finished executing.


SEE ALSO

     lua(1), luac(1), sqlite3(1), intro(3lua)


HISTORY

     An sqlite manual appeared in NetBSD 7.0.


AUTHORS

     The sqlite Lua binding was written by Marc Balmer <mbalmer@NetBSD.org>.

NetBSD 10.0                    October 28, 2013                    NetBSD 10.0