230 lines
7.5 KiB
PHP
230 lines
7.5 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* set of functions that needed for tbl_create.php and tbl_addfield.php in pma
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*
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* @package PhpMyAdmin
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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/**
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* Transforms the radio button field_key into 4 arrays
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*
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* @return array An array of arrays which represents column keys for each index type
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*/
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function PMA_getIndexedColumns()
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{
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$field_cnt = count($_REQUEST['field_name']);
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$field_primary = array();
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$field_index = array();
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$field_unique = array();
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$field_fulltext = array();
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for ($i = 0; $i < $field_cnt; ++$i) {
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if (isset($_REQUEST['field_key'][$i])
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&& strlen($_REQUEST['field_name'][$i])
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) {
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if ($_REQUEST['field_key'][$i] == 'primary_' . $i) {
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$field_primary[] = $i;
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}
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if ($_REQUEST['field_key'][$i] == 'index_' . $i) {
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$field_index[] = $i;
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}
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if ($_REQUEST['field_key'][$i] == 'unique_' . $i) {
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$field_unique[] = $i;
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}
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if ($_REQUEST['field_key'][$i] == 'fulltext_' . $i) {
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$field_fulltext[] = $i;
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}
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} // end if
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} // end for
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return array(
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$field_cnt, $field_primary, $field_index, $field_unique, $field_fulltext );
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}
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/**
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* Initiate the column creation statement according to the table creation or
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* add columns to a existing table
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*
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* @param int $field_cnt number of columns
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* @param boolean $is_create_tbl true if requirement is to get the statement
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* for table creation
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*
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* @return array $definitions An array of initial sql statements
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* according to the request
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*/
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function PMA_buildColumnCreationStatement($field_cnt ,$is_create_tbl = true)
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{
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$definitions = array();
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for ($i = 0; $i < $field_cnt; ++$i) {
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// '0' is also empty for php :-(
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if (empty($_REQUEST['field_name'][$i])
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&& $_REQUEST['field_name'][$i] != '0'
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) {
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continue;
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}
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$definition = PMA_getStatementPrefix($is_create_tbl) .
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PMA_Table::generateFieldSpec(
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$_REQUEST['field_name'][$i],
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$_REQUEST['field_type'][$i],
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$i,
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$_REQUEST['field_length'][$i],
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$_REQUEST['field_attribute'][$i],
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isset($_REQUEST['field_collation'][$i])
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? $_REQUEST['field_collation'][$i]
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: '',
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isset($_REQUEST['field_null'][$i])
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? $_REQUEST['field_null'][$i]
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: 'NOT NULL',
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$_REQUEST['field_default_type'][$i],
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$_REQUEST['field_default_value'][$i],
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isset($_REQUEST['field_extra'][$i])
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? $_REQUEST['field_extra'][$i]
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: false,
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isset($_REQUEST['field_comments'][$i])
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? $_REQUEST['field_comments'][$i]
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: '',
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$field_primary
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);
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$definition .= PMA_setColumnCreationStatementSuffix($i, $is_create_tbl);
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$definitions[] = $definition;
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} // end for
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return $definitions;
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}
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/**
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* Set column creation suffix according to requested position of the new column
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*
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* @param int $current_field_num current column number
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* @param boolean $is_create_tbl true if requirement is to get the statement
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* for table creation
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*
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* @return string $sql_suffix suffix
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*/
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function PMA_setColumnCreationStatementSuffix($current_field_num ,$is_create_tbl = true)
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{
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// no suffix is needed if request is a table creation
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$sql_suffix = " ";
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if (! $is_create_tbl) {
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if ($_REQUEST['field_where'] != 'last') {
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// Only the first field can be added somewhere other than at the end
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if ($current_field_num == 0) {
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if ($_REQUEST['field_where'] == 'first') {
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$sql_suffix .= ' FIRST';
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} else {
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$sql_suffix .= ' AFTER '
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. PMA_Util::backquote($_REQUEST['after_field']);
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}
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} else {
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$sql_suffix .= ' AFTER '
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. PMA_Util::backquote(
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$_REQUEST['field_name'][$current_field_num - 1]
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);
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}
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}
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}
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return $sql_suffix;
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}
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/**
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* Create relevent index statements
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*
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* @param array $indexed_fields an array of index columns
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* @param string $index_type index type that which represents
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* the index type of $indexed_fields
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* @param boolean $is_create_tbl true if requirement is to get the statement
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* for table creation
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*
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* @return array an array of sql statements for indexes
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*/
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function PMA_buildIndexStatements($indexed_fields, $index_type, $is_create_tbl = true)
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{
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$statement = array();
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if (count($indexed_fields)) {
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$fields = array();
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foreach ($indexed_fields as $field_nr) {
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$fields[] = PMA_Util::backquote($_REQUEST['field_name'][$field_nr]);
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}
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$statement[] = PMA_getStatementPrefix($is_create_tbl)
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.' '.$index_type.' (' . implode(', ', $fields) . ') ';
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unset($fields);
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}
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return $statement;
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}
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/**
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* Statement prefix for the PMA_buildColumnCreationStatement()
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*
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* @param boolean $is_create_tbl true if requirement is to get the statement
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* for table creation
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*
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* @return string $sql_prefix prefix
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*/
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function PMA_getStatementPrefix($is_create_tbl = true)
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{
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$sql_prefix = " ";
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if (! $is_create_tbl) {
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$sql_prefix = ' ADD ';
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}
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return $sql_prefix;
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}
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/**
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* Returns sql statement according to the column and index specifications as requested
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*
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* @param boolean $is_create_tbl true if requirement is to get the statement
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* for table creation
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*
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* @return string sql statement
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*/
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function PMA_getColumnCreationStatements($is_create_tbl = true)
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{
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$definitions = array();
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$sql_statement = "";
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list($field_cnt, $field_primary, $field_index,
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$field_unique, $field_fulltext
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) = PMA_getIndexedColumns();
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$definitions = PMA_buildColumnCreationStatement($field_cnt, $is_create_tbl);
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// Builds the primary keys statements
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$primary_key_statements = PMA_buildIndexStatements(
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$field_primary, " PRIMARY KEY ", $is_create_tbl
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);
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$definitions = array_merge($definitions, $primary_key_statements);
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// Builds the indexes statements
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$index_statements = PMA_buildIndexStatements(
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$field_index, " INDEX ", $is_create_tbl
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);
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$definitions = array_merge($definitions, $index_statements);
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// Builds the uniques statements
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$unique_statements = PMA_buildIndexStatements(
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$field_unique, " UNIQUE ", $is_create_tbl
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);
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$definitions = array_merge($definitions, $unique_statements);
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// Builds the fulltext statements
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$fulltext_statements = PMA_buildIndexStatements(
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$field_fulltext, " FULLTEXT ", $is_create_tbl
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);
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$definitions = array_merge($definitions, $fulltext_statements);
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if (count($definitions)) {
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$sql_statement = implode(', ', $definitions);
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}
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$sql_statement = preg_replace('@, $@', '', $sql_statement);
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return $sql_statement;
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}
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?>
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