ilDBAnalyzer Class Reference

This class gives all kind of DB information using the MDB2 manager and reverse module. More...

Collaboration diagram for ilDBAnalyzer:

Public Member Functions
	__construct ()
	Constructor. More...
	getFieldInformation ($a_table, $a_remove_not_allowed_attributes=false)
	Get field information of a table. More...
	getBestDefinitionAlternative ($a_def)
	getAutoIncrementField ($a_table)
	Gets the auto increment field of a table. More...
	getPrimaryKeyInformation ($a_table)
	Get primary key of a table. More...
	getIndicesInformation ($a_table, $a_abstract_table=false)
	Get information on indices of a table. More...
	getConstraintsInformation ($a_table, $a_abstract_table=false)
	Get information on constraints of a table. More...
	hasSequence ($a_table)
	Check whether sequence is defined for current table (only works on "abstraced" tables) More...

Detailed Description

This class gives all kind of DB information using the MDB2 manager and reverse module.

Author

Alex Killing alex..nosp@m.kill.nosp@m.ing@g.nosp@m.mx.d.nosp@m.e

Version

Id

class.ilDBUpdate.php 18649 2009-01-21 09:59:23Z akill

Definition at line 13 of file class.ilDBAnalyzer.php.

Constructor & Destructor Documentation

__construct()

ilDBAnalyzer::__construct

(

)

Constructor.

Definition at line 19 of file class.ilDBAnalyzer.php.

References $ilDB.

        {
                global $ilDB;
                
                $this->manager = $ilDB->db->loadModule('Manager');
                $this->reverse = $ilDB->db->loadModule('Reverse');
                $this->il_db = $ilDB;
                $this->allowed_attributes = $ilDB->getAllowedAttributes();              
        }

Member Function Documentation

getAutoIncrementField()

ilDBAnalyzer::getAutoIncrementField

(

$a_table

)

Gets the auto increment field of a table.

This should be used on ILIAS 3.10.x "MySQL" tables only.

Parameters

string

table name

Returns

string name of autoincrement field

Definition at line 128 of file class.ilDBAnalyzer.php.

        {
                $fields = $this->manager->listTableFields($a_table);
                $inf = array();

                foreach ($fields as $field)
                {
                        $rdef = $this->reverse->getTableFieldDefinition($a_table, $field);
                        if ($rdef[0]["autoincrement"])
                        {
                                return $field;
                        }
                }
                return false;
        }

getBestDefinitionAlternative()

ilDBAnalyzer::getBestDefinitionAlternative

(

$a_def

)

Definition at line 92 of file class.ilDBAnalyzer.php.

Referenced by getFieldInformation().

        {
                // determine which type to choose
                $car = array(
                        "boolean" => 10,
                        "integer" => 20,
                        "decimal" => 30,
                        "float" => 40,
                        "date" => 50,
                        "time" => 60,
                        "timestamp" => 70,
                        "text" => 80,
                        "clob" => 90,
                        "blob" => 100);
                        
                $cur_car = 0;
                $best_alt = 0;  // best alternatice
                foreach ($a_def as $k => $rd)
                {
                        if ($car[$rd["type"]] > $cur_car)
                        {
                                $cur_car = $car[$rd["type"]];
                                $best_alt = $k;
                        }
                }
                
                return $best_alt;
        }

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getConstraintsInformation()

ilDBAnalyzer::getConstraintsInformation	(		$a_table,
			$a_abstract_table = false
	)

Get information on constraints of a table.

Primary key is NOT included! Fulltext indices are included and marked.

Parameters

string

table name

Returns

array indices information array

Definition at line 245 of file class.ilDBAnalyzer.php.

        {
                $constraints = $this->manager->listTableConstraints($a_table);

                $cons = array();
                foreach ($constraints as $c)
                {
                        $info = $this->reverse->getTableConstraintDefinition($a_table, $c);
//var_dump($info);
                        $i = array();
                        if ($info["unique"])
                        {
                                $i["name"] = $c;
                                $i["type"] = "unique";
                                foreach ($info["fields"] as $k => $f)
                                {
                                        $i["fields"][$k] = array(
                                                "position" => $f["position"],
                                                "sorting" => $f["sorting"]);
                                }
                                $cons[] = $i;
                        }
                }

                return $cons;
        }

getFieldInformation()

ilDBAnalyzer::getFieldInformation	(		$a_table,
			$a_remove_not_allowed_attributes = false
	)

Get field information of a table.

Parameters

string

table name

Returns

array field information array

Definition at line 36 of file class.ilDBAnalyzer.php.

References getBestDefinitionAlternative().

Referenced by ilSetting\_getValueType().

        {
//echo "<br>-".$a_table."-".$field."-";
                $fields = $this->manager->listTableFields($a_table);
                $inf = array();
                foreach ($fields as $field)
                {
//echo "<br>-".$a_table."-".$field."-";
                        $rdef = $this->reverse->getTableFieldDefinition($a_table, $field);
//var_dump($rdef);
                        // is this possible?
                        if ($rdef["type"] != $rdef["mdb2type"])
                        {
                                echo "ilDBAnalyzer::getFielInformation: Found type != mdb2type: $a_table, $field";
                        }
                        
                        $best_alt = $this->getBestDefinitionAlternative($rdef);
                        
                        // collect other alternatives
                        reset($rdef);
                        $alt_types = "";
                        foreach ($rdef as $k => $rd)
                        {
                                if ($k != $best_alt)
                                {
                                        $alt_types.= $rdef[$k]["type"].$rdef[$k]["length"]." ";
                                }
                        }
                        
                        $inf[$field] = array(
                                "notnull" => $rdef[$best_alt]["notnull"],
                                "nativetype" => $rdef[$best_alt]["nativetype"],
                                "length" => $rdef[$best_alt]["length"],
                                "unsigned" => $rdef[$best_alt]["unsigned"],
                                "default" => $rdef[$best_alt]["default"],
                                "fixed" => $rdef[$best_alt]["fixed"],
                                "autoincrement" => $rdef[$best_alt]["autoincrement"],
                                "type" => $rdef[$best_alt]["type"],
                                "alt_types" => $alt_types,
                                );
                                
                        if ($a_remove_not_allowed_attributes)
                        {
                                foreach ($inf[$field] as $k => $v)
                                {
                                        if ($k != "type" && !in_array($k, $this->allowed_attributes[$inf[$field]["type"]]))
                                        {
                                                unset($inf[$field][$k]);
                                        }
                                }
                        }
                }

                return $inf;
        }

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getIndicesInformation()

ilDBAnalyzer::getIndicesInformation	(		$a_table,
			$a_abstract_table = false
	)

Get information on indices of a table.

Primary key is NOT included! Fulltext indices are included and marked.

Parameters

string

table name

Returns

array indices information array

Definition at line 180 of file class.ilDBAnalyzer.php.

        {
                //$constraints = $this->manager->listTableConstraints($a_table);
                $indexes = $this->manager->listTableIndexes($a_table);

                // get additional information if database is MySQL
                $mysql_info = array();
                if ($this->il_db->getDBType() == "mysql")
                {
                        $set = $this->il_db->query("SHOW INDEX FROM ".$a_table);
                        while ($rec = $this->il_db->fetchAssoc($set))
                        {
                                if (!empty ($rec["Key_name"]))
                                {
                                        $mysql_info[$rec["Key_name"]] = $rec;
                                }
                                else
                                {
                                        $mysql_info[$rec["key_name"]] = $rec;
                                }
                        }
                }
                
                $ind = array();
                foreach ($indexes as $c)
                {
                        $info = $this->reverse->getTableIndexDefinition($a_table, $c);

                        $i = array();
                        if (!$info["primary"])
                        {
                                $i["name"] = $c;
                                $i["fulltext"] = false;
                                $suffix = ($a_abstract_table)
                                        ? "_idx"
                                        : "";

                                if ($mysql_info[$i["name"]]["Index_type"] == "FULLTEXT" ||
                                        $mysql_info[$i["name"]."_idx"]["Index_type"] == "FULLTEXT" ||
                                        $mysql_info[$i["name"]]["index_type"] == "FULLTEXT" ||
                                        $mysql_info[$i["name"]."_idx"]["index_type"] == "FULLTEXT")
                                {
                                        $i["fulltext"] = true;
                                }
                                foreach ($info["fields"] as $k => $f)
                                {
                                        $i["fields"][$k] = array(
                                                "position" => $f["position"],
                                                "sorting" => $f["sorting"]);
                                }
                                $ind[] = $i;
                        }
                }

                return $ind;
        }

getPrimaryKeyInformation()

ilDBAnalyzer::getPrimaryKeyInformation

(

$a_table

)

Get primary key of a table.

Parameters

string

table name

Returns

array primary key information array

Definition at line 150 of file class.ilDBAnalyzer.php.

Referenced by hasSequence().

        {
                $constraints = $this->manager->listTableConstraints($a_table);
                $pk = false;
                foreach ($constraints as $c)
                {
                        $info = $this->reverse->getTableConstraintDefinition($a_table, $c);
                        if ($info["primary"])
                        {
                                $pk["name"] = $c;
                                foreach ($info["fields"] as $k => $f)
                                {
                                        $pk["fields"][$k] = array(
                                                "position" => $f["position"],
                                                "sorting" => $f["sorting"]);
                                }
                        }
                }

                return $pk;
        }

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hasSequence()

ilDBAnalyzer::hasSequence

(

$a_table

)

Check whether sequence is defined for current table (only works on "abstraced" tables)

Parameters

string

table name

Returns

mixed false, if no sequence is defined, start number otherwise

Definition at line 278 of file class.ilDBAnalyzer.php.

References getPrimaryKeyInformation().

        {
                $seq = $this->manager->listSequences();
                if (is_array($seq) && in_array($a_table, $seq))
                {
                        // sequence field is (only) primary key field of table
                        $pk = $this->getPrimaryKeyInformation($a_table);
                        if (is_array($pk["fields"]) && count($pk["fields"] == 1))
                        {
                                $seq_field = key($pk["fields"]);
                        }
                        else
                        {
                                die("ilDBAnalyzer::hasSequence: Error, sequence defined, but no one-field primary key given. Table: ".$a_table.".");
                        }
                        
                        $set = $this->il_db->query("SELECT MAX(`".$seq_field."`) ma FROM `".$a_table."`");
                        $rec = $this->il_db->fetchAssoc($set);
                        $next = $rec["ma"] + 1;

                        return $next;
                }
                return false;
        }

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The documentation for this class was generated from the following file:

• Services/Database/classes/class.ilDBAnalyzer.php