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sqlite_unbuffered_query

SQLiteDatabase->unbufferedQuery

(No version information available, might be only in CVS)

SQLiteDatabase->unbufferedQuery — Execute a query that does not prefetch and buffer all data

Descrierea

resource sqlite_unbuffered_query ( resource $dbhandle , string $query [, int $result_type [, string &$error_msg ]] )
resource sqlite_unbuffered_query ( string $query , resource $dbhandle [, int $result_type [, string &$error_msg ]] )

Object oriented style (method):

SQLiteDatabase
SQLiteUnbuffered unbufferedQuery ( string $query [, int $result_type [, string &$error_msg ]] )

sqlite_unbuffered_query() is identical to sqlite_query() except that the result that is returned is a sequential forward-only result set that can only be used to read each row, one after the other.

This function is ideal for generating things such as HTML tables where you only need to process one row at a time and don't need to randomly access the row data.

Notă: Functions such as sqlite_seek(), sqlite_rewind(), sqlite_next(), sqlite_current(), and sqlite_num_rows() do not work on result handles returned from sqlite_unbuffered_query().

Parametri

dbhandle

The SQLite Database resource; returned from sqlite_open() when used procedurally. This parameter is not required when using the object-oriented method.

query

The query to be executed.

result_type

Parametrul opţional result_type acceptă o constantă şi determină cum masivul întors va fi indexat. Utilizând SQLITE_ASSOC vor fi întorşi numai indici asociativi (câmpuri denumite) în timp ce cu SQLITE_NUM vor fi întorşi numai indici numerici (numerele de ordine ale câmpurilor). Cu SQLITE_BOTH vor fi întorşi atât indici associativi, cât şi numerici. SQLITE_BOTH este valoarea implicită pentru această funcţie.

error_msg

The specified variable will be filled if an error occurs. This is specially important because SQL syntax errors can't be fetched using the sqlite_last_error() function.

Notă: Două sintaxe alternative sunt susţinute pentru compatibilitate cu alte extensii de baze de date (cum ar fi MySQL). Forma preferată este cae dintâi, unde parametrul dbhandle este primul parametru pentru funcţie.

Valorile întroarse

Returns a result handle or FALSE on failure.

sqlite_unbuffered_query() returns a sequential forward-only result set that can only be used to read ee

Returns a result handle or FALSE on failure.

sqlite_unbuffered_query() returns a sequential forward-only result set that can only be used to read each row, one after the other.

Istoria schimbărilor

Versiunea Descriere
5.1.0 Added the error_msg parameter

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