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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* set of functions for tbl_create.php and tbl_addfield.php
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
* Transforms the radio button field_key into 4 arrays
*
* @return array An array of arrays which represents column keys for each index type
*/
function PMA_getIndexedColumns()
{
$field_cnt = count($_REQUEST['field_name']);
$field_primary = array();
$field_index = array();
$field_unique = array();
$field_fulltext = array();
for ($i = 0; $i < $field_cnt; ++$i) {
if (isset($_REQUEST['field_key'][$i])
&& strlen($_REQUEST['field_name'][$i])
) {
if ($_REQUEST['field_key'][$i] == 'primary_' . $i) {
$field_primary[] = $i;
}
if ($_REQUEST['field_key'][$i] == 'index_' . $i) {
$field_index[] = $i;
}
if ($_REQUEST['field_key'][$i] == 'unique_' . $i) {
$field_unique[] = $i;
}
if ($_REQUEST['field_key'][$i] == 'fulltext_' . $i) {
$field_fulltext[] = $i;
}
} // end if
} // end for
return array(
$field_cnt, $field_primary, $field_index, $field_unique,
$field_fulltext
);
}
/**
* Initiate the column creation statement according to the table creation or
* add columns to a existing table
*
* @param int $field_cnt number of columns
* @param int &$field_primary primary index field
* @param boolean $is_create_tbl true if requirement is to get the statement
* for table creation
*
* @return array $definitions An array of initial sql statements
* according to the request
*/
function PMA_buildColumnCreationStatement(
$field_cnt, &$field_primary, $is_create_tbl = true
) {
$definitions = array();
for ($i = 0; $i < $field_cnt; ++$i) {
// '0' is also empty for php :-(
if (empty($_REQUEST['field_name'][$i])
&& $_REQUEST['field_name'][$i] != '0'
) {
continue;
}
$definition = PMA_getStatementPrefix($is_create_tbl) .
PMA_Table::generateFieldSpec(
$_REQUEST['field_name'][$i],
$_REQUEST['field_type'][$i],
$i,
$_REQUEST['field_length'][$i],
$_REQUEST['field_attribute'][$i],
isset($_REQUEST['field_collation'][$i])
? $_REQUEST['field_collation'][$i]
: '',
isset($_REQUEST['field_null'][$i])
? $_REQUEST['field_null'][$i]
: 'NOT NULL',
$_REQUEST['field_default_type'][$i],
$_REQUEST['field_default_value'][$i],
isset($_REQUEST['field_extra'][$i])
? $_REQUEST['field_extra'][$i]
: false,
isset($_REQUEST['field_comments'][$i])
? $_REQUEST['field_comments'][$i]
: '',
$field_primary
);
$definition .= PMA_setColumnCreationStatementSuffix($i, $is_create_tbl);
$definitions[] = $definition;
} // end for
return $definitions;
}
/**
* Set column creation suffix according to requested position of the new column
*
* @param int $current_field_num current column number
* @param boolean $is_create_tbl true if requirement is to get the statement
* for table creation
*
* @return string $sql_suffix suffix
*/
function PMA_setColumnCreationStatementSuffix($current_field_num,
$is_create_tbl = true
) {
// no suffix is needed if request is a table creation
$sql_suffix = " ";
if ($is_create_tbl) {
return $sql_suffix;
}
if ($_REQUEST['field_where'] == 'last') {
return $sql_suffix;
}
// Only the first field can be added somewhere other than at the end
if ($current_field_num == 0) {
if ($_REQUEST['field_where'] == 'first') {
$sql_suffix .= ' FIRST';
} else {
$sql_suffix .= ' AFTER '
. PMA_Util::backquote($_REQUEST['after_field']);
}
} else {
$sql_suffix .= ' AFTER '
. PMA_Util::backquote(
$_REQUEST['field_name'][$current_field_num - 1]
);
}
return $sql_suffix;
}
/**
* Create relevant index statements
*
* @param array $indexed_fields an array of index columns
* @param string $index_type index type that which represents
* the index type of $indexed_fields
* @param boolean $is_create_tbl true if requirement is to get the statement
* for table creation
*
* @return array an array of sql statements for indexes
*/
function PMA_buildIndexStatements($indexed_fields, $index_type,
$is_create_tbl = true
) {
$statement = array();
if (!count($indexed_fields)) {
return $statement;
}
$fields = array();
foreach ($indexed_fields as $field_nr) {
$fields[] = PMA_Util::backquote($_REQUEST['field_name'][$field_nr]);
}
$statement[] = PMA_getStatementPrefix($is_create_tbl)
. ' ' . $index_type . ' (' . implode(', ', $fields) . ') ';
unset($fields);
return $statement;
}
/**
* Statement prefix for the PMA_buildColumnCreationStatement()
*
* @param boolean $is_create_tbl true if requirement is to get the statement
* for table creation
*
* @return string $sql_prefix prefix
*/
function PMA_getStatementPrefix($is_create_tbl = true)
{
$sql_prefix = " ";
if (! $is_create_tbl) {
$sql_prefix = ' ADD ';
}
return $sql_prefix;
}
/**
* Returns sql statement according to the column and index specifications as
* requested
*
* @param boolean $is_create_tbl true if requirement is to get the statement
* for table creation
*
* @return string sql statement
*/
function PMA_getColumnCreationStatements($is_create_tbl = true)
{
$definitions = array();
$sql_statement = "";
list($field_cnt, $field_primary, $field_index,
$field_unique, $field_fulltext
) = PMA_getIndexedColumns();
$definitions = PMA_buildColumnCreationStatement(
$field_cnt, $field_primary, $is_create_tbl
);
// Builds the primary keys statements
$primary_key_statements = PMA_buildIndexStatements(
$field_primary, " PRIMARY KEY ", $is_create_tbl
);
$definitions = array_merge($definitions, $primary_key_statements);
// Builds the indexes statements
$index_statements = PMA_buildIndexStatements(
$field_index, " INDEX ", $is_create_tbl
);
$definitions = array_merge($definitions, $index_statements);
// Builds the uniques statements
$unique_statements = PMA_buildIndexStatements(
$field_unique, " UNIQUE ", $is_create_tbl
);
$definitions = array_merge($definitions, $unique_statements);
// Builds the fulltext statements
$fulltext_statements = PMA_buildIndexStatements(
$field_fulltext, " FULLTEXT ", $is_create_tbl
);
$definitions = array_merge($definitions, $fulltext_statements);
if (count($definitions)) {
$sql_statement = implode(', ', $definitions);
}
$sql_statement = preg_replace('@, $@', '', $sql_statement);
return $sql_statement;
}
/**
* Function to get table creation sql query
*
* @param string $db database name
* @param string $table table name
*
* @return string
*/
function PMA_getTableCreationQuery($db, $table)
{
// get column addition statements
$sql_statement = PMA_getColumnCreationStatements(true);
// Builds the 'create table' statement
$sql_query = 'CREATE TABLE ' . PMA_Util::backquote($db) . '.'
. PMA_Util::backquote($table) . ' (' . $sql_statement . ')';
// Adds table type, character set, comments and partition definition
if (!empty($_REQUEST['tbl_storage_engine'])
&& ($_REQUEST['tbl_storage_engine'] != 'Default')
) {
$sql_query .= ' ENGINE = ' . $_REQUEST['tbl_storage_engine'];
}
if (!empty($_REQUEST['tbl_collation'])) {
$sql_query .= PMA_generateCharsetQueryPart($_REQUEST['tbl_collation']);
}
if (!empty($_REQUEST['comment'])) {
$sql_query .= ' COMMENT = \''
. PMA_Util::sqlAddSlashes($_REQUEST['comment']) . '\'';
}
if (!empty($_REQUEST['partition_definition'])) {
$sql_query .= ' ' . PMA_Util::sqlAddSlashes(
$_REQUEST['partition_definition']
);
}
$sql_query .= ';';
return $sql_query;
}
/**
* Function to get the number of fields for the table creation form
*
* @return int
*/
function PMA_getNumberOfFieldsFromRequest()
{
if (isset($_REQUEST['submit_num_fields'])) {
$num_fields = $_REQUEST['orig_num_fields'] + $_REQUEST['added_fields'];
} elseif (isset($_REQUEST['num_fields'])
&& intval($_REQUEST['num_fields']) > 0
) {
$num_fields = (int) $_REQUEST['num_fields'];
} else {
$num_fields = 4;
}
return $num_fields;
}
/**
* Function to execute the column creation statement
*
* @param string $db current database
* @param string $table current table
* @param string $err_url error page url
*
* @return array
*/
function PMA_tryColumnCreationQuery($db, $table, $err_url)
{
// get column addition statements
$sql_statement = PMA_getColumnCreationStatements(false);
// To allow replication, we first select the db to use and then run queries
// on this db.
$GLOBALS['dbi']->selectDb($db)
or PMA_Util::mysqlDie(
$GLOBALS['dbi']->getError(),
'USE ' . PMA_Util::backquote($db),
false,
$err_url
);
$sql_query = 'ALTER TABLE ' .
PMA_Util::backquote($table) . ' ' . $sql_statement . ';';
return array($GLOBALS['dbi']->tryQuery($sql_query) , $sql_query);
}
?>
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