diff options
Diffstat (limited to 'user_guide_src/source/database/utilities.rst')
| -rw-r--r-- | user_guide_src/source/database/utilities.rst | 121 |
1 files changed, 78 insertions, 43 deletions
diff --git a/user_guide_src/source/database/utilities.rst b/user_guide_src/source/database/utilities.rst index 7dcf1df9c..b0920109f 100644 --- a/user_guide_src/source/database/utilities.rst +++ b/user_guide_src/source/database/utilities.rst @@ -32,7 +32,12 @@ $this->dbutil->list_databases() Returns an array of database names:: - $dbs = $this->dbutil->list_databases(); foreach ($dbs as $db) { echo $db; } + $dbs = $this->dbutil->list_databases(); + + foreach ($dbs as $db) + { + echo $db; + } $this->dbutil->database_exists(); ================================== @@ -40,7 +45,10 @@ $this->dbutil->database_exists(); Sometimes it's helpful to know whether a particular database exists. Returns a boolean TRUE/FALSE. Usage example:: - if ($this->dbutil->database_exists('database_name')) { // some code... } + if ($this->dbutil->database_exists('database_name')) + { + // some code... + } Note: Replace *database_name* with the name of the table you are looking for. This function is case sensitive. @@ -53,7 +61,10 @@ $this->dbutil->optimize_table('table_name'); Permits you to optimize a table using the table name specified in the first parameter. Returns TRUE/FALSE based on success or failure:: - if ($this->dbutil->optimize_table('table_name')) { echo 'Success!'; } + if ($this->dbutil->optimize_table('table_name')) + { + echo 'Success!'; + } .. note:: Not all database platforms support table optimization. @@ -65,7 +76,10 @@ $this->dbutil->repair_table('table_name'); Permits you to repair a table using the table name specified in the first parameter. Returns TRUE/FALSE based on success or failure:: - if ($this->dbutil->repair_table('table_name')) { echo 'Success!'; } + if ($this->dbutil->repair_table('table_name')) + { + echo 'Success!'; + } .. note:: Not all database platforms support table repairs. @@ -80,7 +94,12 @@ FALSE on failure. :: - $result = $this->dbutil->optimize_database(); if ($result !== FALSE) { print_r($result); } + $result = $this->dbutil->optimize_database(); + + if ($result !== FALSE) + { + print_r($result); + } .. note:: Not all database platforms support table optimization. @@ -91,7 +110,11 @@ Permits you to generate a CSV file from a query result. The first parameter of the function must contain the result object from your query. Example:: - $this->load->dbutil(); $query = $this->db->query("SELECT * FROM mytable"); echo $this->dbutil->csv_from_result($query); + $this->load->dbutil(); + + $query = $this->db->query("SELECT * FROM mytable"); + + echo $this->dbutil->csv_from_result($query); The second, third, and fourth parameters allow you to set the delimiter newline, and enclosure characters respectively. By default tabs are @@ -115,7 +138,18 @@ Permits you to generate an XML file from a query result. The first parameter expects a query result object, the second may contain an optional array of config parameters. Example:: - $this->load->dbutil(); $query = $this->db->query("SELECT * FROM mytable"); $config = array ( 'root' => 'root', 'element' => 'element', 'newline' => "\n", 'tab' => "\t" ); echo $this->dbutil->xml_from_result($query, $config); + $this->load->dbutil(); + + $query = $this->db->query("SELECT * FROM mytable"); + + $config = array ( + 'root' => 'root', + 'element' => 'element', + 'newline' => "\n", + 'tab' => "\t" + ); + + echo $this->dbutil->xml_from_result($query, $config); .. important:: This function will NOT write the XML file for you. It simply creates the XML layout. If you need to write the file @@ -140,7 +174,19 @@ Usage Example :: - // Load the DB utility class $this->load->dbutil(); // Backup your entire database and assign it to a variable $backup =& $this->dbutil->backup(); // Load the file helper and write the file to your server $this->load->helper('file'); write_file('/path/to/mybackup.gz', $backup); // Load the download helper and send the file to your desktop $this->load->helper('download'); force_download('mybackup.gz', $backup); + // Load the DB utility class + $this->load->dbutil(); + + // Backup your entire database and assign it to a variable + $backup =& $this->dbutil->backup(); + + // Load the file helper and write the file to your server + $this->load->helper('file'); + write_file('/path/to/mybackup.gz', $backup); + + // Load the download helper and send the file to your desktop + $this->load->helper('download'); + force_download('mybackup.gz', $backup); Setting Backup Preferences -------------------------- @@ -148,42 +194,31 @@ Setting Backup Preferences Backup preferences are set by submitting an array of values to the first parameter of the backup function. Example:: - $prefs = array( 'tables' => array('table1', 'table2'), // Array of tables to backup. 'ignore' => array(), // List of tables to omit from the backup 'format' => 'txt', // gzip, zip, txt 'filename' => 'mybackup.sql', // File name - NEEDED ONLY WITH ZIP FILES 'add_drop' => TRUE, // Whether to add DROP TABLE statements to backup file 'add_insert' => TRUE, // Whether to add INSERT data to backup file 'newline' => "\n" // Newline character used in backup file ); $this->dbutil->backup($prefs); + $prefs = array( + 'tables' => array('table1', 'table2'), // Array of tables to backup. + 'ignore' => array(), // List of tables to omit from the backup + 'format' => 'txt', // gzip, zip, txt + 'filename' => 'mybackup.sql', // File name - NEEDED ONLY WITH ZIP FILES + 'add_drop' => TRUE, // Whether to add DROP TABLE statements to backup file + 'add_insert' => TRUE, // Whether to add INSERT data to backup file + 'newline' => "\n" // Newline character used in backup file + ); + + $this->dbutil->backup($prefs); Description of Backup Preferences --------------------------------- -Preference -Default Value -Options -Description -**tables** -empty array -None -An array of tables you want backed up. If left blank all tables will be -exported. -**ignore** -empty array -None -An array of tables you want the backup routine to ignore. -**format** -gzip -gzip, zip, txt -The file format of the export file. -**filename** -the current date/time -None -The name of the backed-up file. The name is needed only if you are using -zip compression. -**add_drop** -TRUE -TRUE/FALSE -Whether to include DROP TABLE statements in your SQL export file. -**add_insert** -TRUE -TRUE/FALSE -Whether to include INSERT statements in your SQL export file. -**newline** -"\\n" -"\\n", "\\r", "\\r\\n" -Type of newline to use in your SQL export file. +=============== ======================= ======================= ======================================================================== +Preference Default Value Options Description +=============== ======================= ======================= ======================================================================== +**tables** empty array None An array of tables you want backed up. If left blank all tables will be + exported. +**ignore** empty array None An array of tables you want the backup routine to ignore. +**format** gzip gzip, zip, txt The file format of the export file. +**filename** the current date/time None The name of the backed-up file. The name is needed only if you are using + zip compression. +**add_drop** TRUE TRUE/FALSE Whether to include DROP TABLE statements in your SQL export file. +**add_insert** TRUE TRUE/FALSE Whether to include INSERT statements in your SQL export file. +**newline** "\\n" "\\n", "\\r", "\\r\\n" Type of newline to use in your SQL export file. +=============== ======================= ======================= ========================================================================
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