<?php

< 


/**

<   @version   v5.20.16  12-Jan-2020
<   @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
<   @copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
<   Released under both BSD license and Lesser GPL library license.
<   Whenever there is any discrepancy between the two licenses,
<   the BSD license will take precedence.
< 
<   Set tabs to 4 for best viewing.
< 



>  * Data Dictionary for PostgreSQL.
>  *
>  * This file is part of ADOdb, a Database Abstraction Layer library for PHP.
>  *
>  * @package ADOdb
>  * @link https://adodb.org Project's web site and documentation
>  * @link https://github.com/ADOdb/ADOdb Source code and issue tracker
>  *
>  * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
>  * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
>  * any later version. This means you can use it in proprietary products.
>  * See the LICENSE.md file distributed with this source code for details.
>  * @license BSD-3-Clause
>  * @license LGPL-2.1-or-later
>  *
>  * @copyright 2000-2013 John Lim
>  * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community


*/

// security - hide paths
if (!defined('ADODB_DIR')) die();


< class ADODB2_postgres extends ADODB_DataDict {
< 



> class ADODB2_postgres extends ADODB_DataDict
> {


	var $databaseType = 'postgres';
	var $seqField = false;
	var $seqPrefix = 'SEQ_';
	var $addCol = ' ADD COLUMN';
	var $quote = '"';
	var $renameTable = 'ALTER TABLE %s RENAME TO %s'; // at least since 7.1
	var $dropTable = 'DROP TABLE %s CASCADE';


< 	function MetaType($t,$len=-1,$fieldobj=false)



> 	public $blobAllowsDefaultValue = true;
> 	public $blobAllowsNotNull = true;
> 
> 	function metaType($t, $len=-1, $fieldobj=false)


	{
		if (is_object($t)) {
			$fieldobj = $t;
			$t = $fieldobj->type;
			$len = $fieldobj->max_length;
		}

> 
		$is_serial = is_object($fieldobj) && !empty($fieldobj->primary_key) && !empty($fieldobj->unique) &&
> 		$t = strtoupper($t);
			!empty($fieldobj->has_default) && substr($fieldobj->default_value,0,8) == 'nextval(';
> 

> 		if (array_key_exists($t,$this->connection->customActualTypes))
		switch (strtoupper($t)) {
> 			return  $this->connection->customActualTypes[$t];
			case 'INTERVAL':
> 



< 		switch (strtoupper($t)) {



> 		switch ($t) {
> 


			case 'CHARACTER':
			case 'VARCHAR':
			case 'NAME':
	   		case 'BPCHAR':
				if ($len <= $this->blobSize) return 'C';

			case 'TEXT':
				return 'X';

			case 'IMAGE': // user defined type
			case 'BLOB': // user defined type
			case 'BIT':	// This is a bit string, not a single bit, so don't return 'L'
			case 'VARBIT':
			case 'BYTEA':
				return 'B';

			case 'BOOL':
			case 'BOOLEAN':
				return 'L';

			case 'DATE':
				return 'D';

			case 'TIME':
			case 'DATETIME':
			case 'TIMESTAMP':
			case 'TIMESTAMPTZ':
				return 'T';

			case 'INTEGER': return !$is_serial ? 'I' : 'R';
			case 'SMALLINT':
			case 'INT2': return !$is_serial ? 'I2' : 'R';
			case 'INT4': return !$is_serial ? 'I4' : 'R';
			case 'BIGINT':
			case 'INT8': return !$is_serial ? 'I8' : 'R';

			case 'OID':
			case 'SERIAL':
				return 'R';

			case 'FLOAT4':
			case 'FLOAT8':
			case 'DOUBLE PRECISION':
			case 'REAL':
				return 'F';

			 default:

< 			 	return 'N';



> 				return ADODB_DEFAULT_METATYPE;


		}
	}


<  	function ActualType($meta)



> 	function actualType($meta)


	{

> 		$meta = strtoupper($meta);
		switch($meta) {
> 
		case 'C': return 'VARCHAR';
> 		/*
		case 'XL':
> 		* Add support for custom meta types. We do this
		case 'X': return 'TEXT';
> 		* first, that allows us to override existing types

> 		*/
		case 'C2': return 'VARCHAR';
> 		if (isset($this->connection->customMetaTypes[$meta]))
		case 'X2': return 'TEXT';
> 			return $this->connection->customMetaTypes[$meta]['actual'];

> 


		case 'B': return 'BYTEA';

		case 'D': return 'DATE';
		case 'TS':
		case 'T': return 'TIMESTAMP';

		case 'L': return 'BOOLEAN';
		case 'I': return 'INTEGER';
		case 'I1': return 'SMALLINT';
		case 'I2': return 'INT2';
		case 'I4': return 'INT4';
		case 'I8': return 'INT8';

		case 'F': return 'FLOAT8';
		case 'N': return 'NUMERIC';
		default:
			return $meta;
		}
	}

	/**
	 * Adding a new Column
	 *
	 * reimplementation of the default function as postgres does NOT allow to set the default in the same statement
	 *
	 * @param string $tabname table-name
	 * @param string $flds column-names and types for the changed columns
	 * @return array with SQL strings
	 */

< 	function AddColumnSQL($tabname, $flds)



> 	function addColumnSQL($tabname, $flds)


	{

< 		$tabname = $this->TableName ($tabname);



> 		$tabname = $this->tableName($tabname);


		$sql = array();
		$not_null = false;

< 		list($lines,$pkey) = $this->_GenFields($flds);
< 		$alter = 'ALTER TABLE ' . $tabname . $this->addCol . ' ';



> 		list($lines,$pkey) = $this->_genFields($flds);
> 		$alter = 'ALTER TABLE ' . $tabname . $this->addCol;
> 		$alter .= (float)@$this->serverInfo['version'] < 9.6 ? ' ' : ' IF NOT EXISTS ';


		foreach($lines as $v) {
			if (($not_null = preg_match('/NOT NULL/i',$v))) {
				$v = preg_replace('/NOT NULL/i','',$v);
			}
			if (preg_match('/^([^ ]+) .*DEFAULT (\'[^\']+\'|\"[^\"]+\"|[^ ]+)/',$v,$matches)) {
				list(,$colname,$default) = $matches;
				$sql[] = $alter . str_replace('DEFAULT '.$default,'',$v);

< 				$sql[] = 'UPDATE '.$tabname.' SET '.$colname.'='.$default;



> 				$sql[] = 'UPDATE '.$tabname.' SET '.$colname.'='.$default.' WHERE '.$colname.' IS NULL ';


				$sql[] = 'ALTER TABLE '.$tabname.' ALTER COLUMN '.$colname.' SET DEFAULT ' . $default;
			} else {
				$sql[] = $alter . $v;
			}
			if ($not_null) {
				list($colname) = explode(' ',$v);
				$sql[] = 'ALTER TABLE '.$tabname.' ALTER COLUMN '.$colname.' SET NOT NULL';
			}
		}
		return $sql;
	}



< 	function DropIndexSQL ($idxname, $tabname = NULL)



> 	function dropIndexSQL($idxname, $tabname = NULL)


	{

< 	   return array(sprintf($this->dropIndex, $this->TableName($idxname), $this->TableName($tabname)));



> 		return array(sprintf($this->dropIndex, $this->tableName($idxname), $this->tableName($tabname)));


	}

	/**
	 * Change the definition of one column
	 *

< 	 * Postgres can't do that on it's own, you need to supply the complete defintion of the new table,
< 	 * to allow, recreating the table and copying the content over to the new table



> 	 * Postgres can't do that on its own, you need to supply the complete
> 	 * definition of the new table, to allow recreating the table and copying
> 	 * the content over to the new table.
> 	 *


	 * @param string $tabname table-name
	 * @param string $flds column-name and type for the changed column

< 	 * @param string $tableflds complete defintion of the new table, eg. for postgres, default ''
< 	 * @param array/ $tableoptions options for the new table see CreateTableSQL, default ''



> 	 * @param string $tableflds    complete definition of the new table, e.g. for postgres, default ''
> 	 * @param array  $tableoptions options for the new table {@see CreateTableSQL()}, default ''
> 	 *


	 * @return array with SQL strings
	 */

< 	 /*
< 	function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
< 	{
< 		if (!$tableflds) {
< 			if ($this->debug) ADOConnection::outp("AlterColumnSQL needs a complete table-definiton for PostgreSQL");
< 			return array();
< 		}
< 		return $this->_recreate_copy_table($tabname,False,$tableflds,$tableoptions);
< 	}*/
< 
< 	function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')



> 	function alterColumnSQL($tabname, $flds, $tableflds='', $tableoptions='')


	{
		// Check if alter single column datatype available - works with 8.0+
		$has_alter_column = 8.0 <= (float) @$this->serverInfo['version'];

		if ($has_alter_column) {

< 			$tabname = $this->TableName($tabname);



> 			$tabname = $this->tableName($tabname);


			$sql = array();

< 			list($lines,$pkey) = $this->_GenFields($flds);



> 			list($lines,$pkey) = $this->_genFields($flds);


			$set_null = false;
			foreach($lines as $v) {
				$alter = 'ALTER TABLE ' . $tabname . $this->alterCol . ' ';
				if ($not_null = preg_match('/NOT NULL/i',$v)) {
					$v = preg_replace('/NOT NULL/i','',$v);
				}
				 // this next block doesn't work - there is no way that I can see to
				 // explicitly ask a column to be null using $flds
				else if ($set_null = preg_match('/NULL/i',$v)) {

< 					// if they didn't specify not null, see if they explicitely asked for null



> 					// if they didn't specify not null, see if they explicitly asked for null


					// Lookbehind pattern covers the case 'fieldname NULL datatype DEFAULT NULL'
					// only the first NULL should be removed, not the one specifying
					// the default value
					$v = preg_replace('/(?<!DEFAULT)\sNULL/i','',$v);
				}

				if (preg_match('/^([^ ]+) .*DEFAULT (\'[^\']+\'|\"[^\"]+\"|[^ ]+)/',$v,$matches)) {

< 					$existing = $this->MetaColumns($tabname);



> 					$existing = $this->metaColumns($tabname);


					list(,$colname,$default) = $matches;
					$alter .= $colname;
					if ($this->connection) {

< 						$old_coltype = $this->connection->MetaType($existing[strtoupper($colname)]);
< 					}
< 					else {



> 						$old_coltype = $this->connection->metaType($existing[strtoupper($colname)]);
> 					} else {


						$old_coltype = $t;
					}
					$v = preg_replace('/^' . preg_quote($colname) . '\s/', '', $v);
					$t = trim(str_replace('DEFAULT '.$default,'',$v));

					// Type change from bool to int
					if ( $old_coltype == 'L' && $t == 'INTEGER' ) {
						$sql[] = $alter . ' DROP DEFAULT';
						$sql[] = $alter . " TYPE $t USING ($colname::BOOL)::INT";
						$sql[] = $alter . " SET DEFAULT $default";
					}
					// Type change from int to bool
					else if ( $old_coltype == 'I' && $t == 'BOOLEAN' ) {
						if( strcasecmp('NULL', trim($default)) != 0 ) {
							$default = $this->connection->qstr($default);
						}
						$sql[] = $alter . ' DROP DEFAULT';
						$sql[] = $alter . " TYPE $t USING CASE WHEN $colname = 0 THEN false ELSE true END";
						$sql[] = $alter . " SET DEFAULT $default";
					}
					// Any other column types conversion
					else {
						$sql[] = $alter . " TYPE $t";
						$sql[] = $alter . " SET DEFAULT $default";
					}

				}
				else {
					// drop default?
					preg_match ('/^\s*(\S+)\s+(.*)$/',$v,$matches);
					list (,$colname,$rest) = $matches;
					$alter .= $colname;
					$sql[] = $alter . ' TYPE ' . $rest;
				}

#				list($colname) = explode(' ',$v);
				if ($not_null) {
					// this does not error out if the column is already not null
					$sql[] = $alter . ' SET NOT NULL';
				}
				if ($set_null) {
					// this does not error out if the column is already null
					$sql[] = $alter . ' DROP NOT NULL';
				}
			}
			return $sql;
		}

		// does not have alter column
		if (!$tableflds) {
			if ($this->debug) ADOConnection::outp("AlterColumnSQL needs a complete table-definiton for PostgreSQL");
			return array();
		}

< 		return $this->_recreate_copy_table($tabname,False,$tableflds,$tableoptions);



> 		return $this->_recreate_copy_table($tabname, false, $tableflds,$tableoptions);


	}

	/**
	 * Drop one column
	 *

< 	 * Postgres < 7.3 can't do that on it's own, you need to supply the complete defintion of the new table,



> 	 * Postgres < 7.3 can't do that on it's own, you need to supply the complete definition of the new table,


	 * to allow, recreating the table and copying the content over to the new table
	 * @param string $tabname table-name
	 * @param string $flds column-name and type for the changed column

< 	 * @param string $tableflds complete defintion of the new table, eg. for postgres, default ''
< 	 * @param array/ $tableoptions options for the new table see CreateTableSQL, default ''



> 	 * @param string $tableflds complete definition of the new table, eg. for postgres, default ''
> 	 * @param array  $tableoptions options for the new table {@see CreateTableSQL}, default []


	 * @return array with SQL strings
	 */

< 	function DropColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')



> 	function dropColumnSQL($tabname, $flds, $tableflds='', $tableoptions='')


	{
		$has_drop_column = 7.3 <= (float) @$this->serverInfo['version'];
		if (!$has_drop_column && !$tableflds) {

< 			if ($this->debug) ADOConnection::outp("DropColumnSQL needs complete table-definiton for PostgreSQL < 7.3");



> 			if ($this->debug) {
> 				ADOConnection::outp("dropColumnSQL needs complete table-definiton for PostgreSQL < 7.3");
> 			}


		return array();
	}
		if ($has_drop_column) {

< 			return ADODB_DataDict::DropColumnSQL($tabname, $flds);



> 			return ADODB_DataDict::dropColumnSQL($tabname, $flds);


		}
		return $this->_recreate_copy_table($tabname,$flds,$tableflds,$tableoptions);
	}

	/**
	 * Save the content into a temp. table, drop and recreate the original table and copy the content back in
	 *
	 * We also take care to set the values of the sequenz and recreate the indexes.
	 * All this is done in a transaction, to not loose the content of the table, if something went wrong!
	 * @internal
	 * @param string $tabname table-name
	 * @param string $dropflds column-names to drop

< 	 * @param string $tableflds complete defintion of the new table, eg. for postgres
< 	 * @param array/string $tableoptions options for the new table see CreateTableSQL, default ''



> 	 * @param string $tableflds complete definition of the new table, eg. for postgres
> 	 * @param array|string $tableoptions options for the new table see CreateTableSQL, default ''


	 * @return array with SQL strings
	 */
	function _recreate_copy_table($tabname,$dropflds,$tableflds,$tableoptions='')
	{
		if ($dropflds && !is_array($dropflds)) $dropflds = explode(',',$dropflds);
		$copyflds = array();

< 		foreach($this->MetaColumns($tabname) as $fld) {
< 			if (!$dropflds || !in_array($fld->name,$dropflds)) {
< 				// we need to explicit convert varchar to a number to be able to do an AlterColumn of a char column to a nummeric one
< 				if (preg_match('/'.$fld->name.' (I|I2|I4|I8|N|F)/i',$tableflds,$matches) &&
< 					in_array($fld->type,array('varchar','char','text','bytea'))) {



> 		foreach($this->metaColumns($tabname) as $fld) {
> 			if (preg_match('/'.$fld->name.' (\w+)/i', $tableflds, $matches)) {
> 				$new_type = strtoupper($matches[1]);
> 				// AlterColumn of a char column to a nummeric one needs an explicit conversation
> 				if (in_array($new_type, array('I', 'I2', 'I4', 'I8', 'N', 'F')) &&
> 					in_array($fld->type, array('varchar','char','text','bytea'))
> 				) {


					$copyflds[] = "to_number($fld->name,'S9999999999999D99')";
				} else {

> 					// other column-type changes needs explicit decode, encode for bytea or cast otherwise
					$copyflds[] = $fld->name;
> 					$new_actual_type = $this->actualType($new_type);
				}
> 					if (strtoupper($fld->type) != $new_actual_type) {
				// identify the sequence name and the fld its on
> 						if ($new_actual_type == 'BYTEA' && $fld->type == 'text') {
				if ($fld->primary_key && $fld->has_default &&
> 							$copyflds[] = "DECODE($fld->name, 'escape')";
					preg_match("/nextval\('([^']+)'::text\)/",$fld->default_value,$matches)) {
> 						} elseif ($fld->type == 'bytea' && $new_actual_type == 'TEXT') {
					$seq_name = $matches[1];
> 							$copyflds[] = "ENCODE($fld->name, 'escape')";
					$seq_fld = $fld->name;
> 						} else {
				}
> 							$copyflds[] = "CAST($fld->name AS $new_actual_type)";
			}
> 						}
		}
> 					}
		$copyflds = implode(', ',$copyflds);
> 				}

> 			} else {



< 					preg_match("/nextval\('([^']+)'::text\)/",$fld->default_value,$matches)) {



> 				preg_match("/nextval\('([^']+)'::(text|regclass)\)/", $fld->default_value, $matches)) {



< 		}


		$aSql[] = "SELECT * INTO TEMPORARY TABLE $tempname FROM $tabname";

< 		$aSql = array_merge($aSql,$this->DropTableSQL($tabname));
< 		$aSql = array_merge($aSql,$this->CreateTableSQL($tabname,$tableflds,$tableoptions));



> 		$aSql = array_merge($aSql,$this->dropTableSQL($tabname));
> 		$aSql = array_merge($aSql,$this->createTableSQL($tabname, $tableflds, $tableoptions));


		$aSql[] = "INSERT INTO $tabname SELECT $copyflds FROM $tempname";
		if ($seq_name && $seq_fld) {	// if we have a sequence we need to set it again
			$seq_name = $tabname.'_'.$seq_fld.'_seq';	// has to be the name of the new implicit sequence
			$aSql[] = "SELECT setval('$seq_name',MAX($seq_fld)) FROM $tabname";
		}
		$aSql[] = "DROP TABLE $tempname";

< 		// recreate the indexes, if they not contain one of the droped columns
< 		foreach($this->MetaIndexes($tabname) as $idx_name => $idx_data)
< 		{



> 		// recreate the indexes, if they not contain one of the dropped columns
> 		foreach($this->metaIndexes($tabname) as $idx_name => $idx_data) {


			if (substr($idx_name,-5) != '_pkey' && (!$dropflds || !count(array_intersect($dropflds,$idx_data['columns'])))) {

< 				$aSql = array_merge($aSql,$this->CreateIndexSQL($idx_name,$tabname,$idx_data['columns'],
< 					$idx_data['unique'] ? array('UNIQUE') : False));



> 				$aSql = array_merge($aSql,$this->createIndexSQL($idx_name, $tabname, $idx_data['columns'],
> 					$idx_data['unique'] ? array('UNIQUE') : false));


			}
		}
		$aSql[] = 'COMMIT';
		return $aSql;
	}


< 	function DropTableSQL($tabname)



> 	function dropTableSQL($tabname)


	{

< 		$sql = ADODB_DataDict::DropTableSQL($tabname);
< 
< 		$drop_seq = $this->_DropAutoIncrement($tabname);
< 		if ($drop_seq) $sql[] = $drop_seq;



> 		$sql = ADODB_DataDict::dropTableSQL($tabname);




> 		$drop_seq = $this->_dropAutoIncrement($tabname);
		return $sql;
> 		if ($drop_seq) {
	}
> 			$sql[] = $drop_seq;

> 		}


	// return string must begin with space

< 	function _CreateSuffix($fname, &$ftype, $fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)



> 	function _createSuffix($fname, &$ftype, $fnotnull, $fdefault, $fautoinc, $fconstraint, $funsigned)


	{
		if ($fautoinc) {
			$ftype = 'SERIAL';
			return '';
		}
		$suffix = '';
		if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
		if ($fnotnull) $suffix .= ' NOT NULL';
		if ($fconstraint) $suffix .= ' '.$fconstraint;
		return $suffix;
	}


< 	// search for a sequece for the given table (asumes the seqence-name contains the table-name!)



> 	// search for a sequence for the given table (asumes the seqence-name contains the table-name!)


	// if yes return sql to drop it
	// this is still necessary if postgres < 7.3 or the SERIAL was created on an earlier version!!!

< 	function _DropAutoIncrement($tabname)



> 	function _dropAutoIncrement($tabname)


	{
		$tabname = $this->connection->quote('%'.$tabname.'%');


< 		$seq = $this->connection->GetOne("SELECT relname FROM pg_class WHERE NOT relname ~ 'pg_.*' AND relname LIKE $tabname AND relkind='S'");



> 		$seq = $this->connection->getOne("SELECT relname FROM pg_class WHERE NOT relname ~ 'pg_.*' AND relname LIKE $tabname AND relkind='S'");




< 		// check if a tables depends on the sequenz and it therefor cant and dont need to be droped separatly
< 		if (!$seq || $this->connection->GetOne("SELECT relname FROM pg_class JOIN pg_depend ON pg_class.relfilenode=pg_depend.objid WHERE relname='$seq' AND relkind='S' AND deptype='i'")) {
< 			return False;



> 		// check if a tables depends on the sequence and it therefore can't and don't need to be dropped separately
> 		if (!$seq || $this->connection->getOne("SELECT relname FROM pg_class JOIN pg_depend ON pg_class.relfilenode=pg_depend.objid WHERE relname='$seq' AND relkind='S' AND deptype='i'")) {
> 			return false;


		}
		return "DROP SEQUENCE ".$seq;
	}


< 	function RenameTableSQL($tabname,$newname)



> 	function renameTableSQL($tabname, $newname)


	{
		if (!empty($this->schema)) {

< 			$rename_from = $this->TableName($tabname);



> 			$rename_from = $this->tableName($tabname);


			$schema_save = $this->schema;
			$this->schema = false;

< 			$rename_to = $this->TableName($newname);



> 			$rename_to = $this->tableName($newname);


			$this->schema = $schema_save;
			return array (sprintf($this->renameTable, $rename_from, $rename_to));
		}


< 		return array (sprintf($this->renameTable, $this->TableName($tabname),$this->TableName($newname)));



> 		return array (sprintf($this->renameTable, $this->tableName($tabname), $this->tableName($newname)));


	}

	/*
	CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name (
	{ column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ]
	| table_constraint } [, ... ]
	)
	[ INHERITS ( parent_table [, ... ] ) ]
	[ WITH OIDS | WITHOUT OIDS ]
	where column_constraint is:
	[ CONSTRAINT constraint_name ]
	{ NOT NULL | NULL | UNIQUE | PRIMARY KEY |
	CHECK (expression) |
	REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ]
	[ ON DELETE action ] [ ON UPDATE action ] }
	[ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
	and table_constraint is:
	[ CONSTRAINT constraint_name ]
	{ UNIQUE ( column_name [, ... ] ) |
	PRIMARY KEY ( column_name [, ... ] ) |
	CHECK ( expression ) |
	FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ]
	[ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] }
	[ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
	*/


	/*
	CREATE [ UNIQUE ] INDEX index_name ON table
[ USING acc_method ] ( column [ ops_name ] [, ...] )
[ WHERE predicate ]
CREATE [ UNIQUE ] INDEX index_name ON table
[ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] )
[ WHERE predicate ]
	*/

< 	function _IndexSQL($idxname, $tabname, $flds, $idxoptions)



> 	function _indexSQL($idxname, $tabname, $flds, $idxoptions)


	{
		$sql = array();

		if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
			$sql[] = sprintf ($this->dropIndex, $idxname, $tabname);

< 			if ( isset($idxoptions['DROP']) )



> 			if ( isset($idxoptions['DROP']) ) {


				return $sql;
		}

> 		}



		if ( empty ($flds) ) {
			return $sql;
		}

		$unique = isset($idxoptions['UNIQUE']) ? ' UNIQUE' : '';

		$s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname . ' ';


< 		if (isset($idxoptions['HASH']))



> 		if (isset($idxoptions['HASH'])) {


			$s .= 'USING HASH ';

> 		}




< 		if ( isset($idxoptions[$this->upperName]) )



> 		if (isset($idxoptions[$this->upperName])) {


			$s .= $idxoptions[$this->upperName];

> 		}




< 		if ( is_array($flds) )



> 		if (is_array($flds)) {


			$flds = implode(', ',$flds);

> 		}


		$s .= '(' . $flds . ')';
		$sql[] = $s;

		return $sql;
	}


< 	function _GetSize($ftype, $ty, $fsize, $fprec)



> 	function _getSize($ftype, $ty, $fsize, $fprec, $options=false)


	{
		if (strlen($fsize) && $ty != 'X' && $ty != 'B' && $ty  != 'I' && strpos($ftype,'(') === false) {
			$ftype .= "(".$fsize;
			if (strlen($fprec)) $ftype .= ",".$fprec;
			$ftype .= ')';
		}

> 
		return $ftype;
> 		/*
	}
> 		* Handle additional options
}
> 		*/
> 		if (is_array($options)) {
> 			foreach($options as $type=>$value) {
> 				switch ($type) {
> 					case 'ENUM':
> 						$ftype .= '(' . $value . ')';
> 						break;
> 					default:
> 				}
> 			}
> 		}



> 
> 	function changeTableSQL($tablename, $flds, $tableoptions = false, $dropOldFlds=false)
> 	{
> 		global $ADODB_FETCH_MODE;
> 		parent::changeTableSQL($tablename, $flds);
> 		$save = $ADODB_FETCH_MODE;
> 		$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
> 		if ($this->connection->fetchMode !== false) {
> 			$savem = $this->connection->setFetchMode(false);
> 		}
> 
> 		// check table exists
> 		$save_handler = $this->connection->raiseErrorFn;
> 		$this->connection->raiseErrorFn = '';
> 		$cols = $this->metaColumns($tablename);
> 		$this->connection->raiseErrorFn = $save_handler;
> 
> 		if (isset($savem)) {
> 			$this->connection->setFetchMode($savem);
> 		}
> 		$ADODB_FETCH_MODE = $save;
> 
> 		$sqlResult=array();
> 		if ( empty($cols)) {
> 			$sqlResult=$this->createTableSQL($tablename, $flds, $tableoptions);
> 		} else {
> 			$sqlResultAdd = $this->addColumnSQL($tablename, $flds);
> 			$sqlResultAlter = $this->alterColumnSQL($tablename, $flds, '', $tableoptions);
> 			$sqlResult = array_merge((array)$sqlResultAdd, (array)$sqlResultAlter);
> 
> 			if ($dropOldFlds) {
> 				// already exists, alter table instead
> 				list($lines,$pkey,$idxs) = $this->_genFields($flds);
> 				// genfields can return FALSE at times
> 				if ($lines == null) {
> 					$lines = array();
> 				}
> 				$alter = 'ALTER TABLE ' . $this->tableName($tablename);
> 				foreach ( $cols as $id => $v ) {
> 					if ( !isset($lines[$id]) ) {
> 						$sqlResult[] = $alter . $this->dropCol . ' ' . $v->name;
> 					}
> 				}
> 			}
> 
> 		}
> 		return $sqlResult;



> } // end class