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MDL-29514 drop support for enum data types

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This commit is contained in:
Petr Skoda
2012-03-10 21:36:48 +01:00
parent 23778a4dfa
commit 05aae0a571
20 changed files with 2 additions and 776 deletions
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lib/ddl/database_manager.php
-82
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@@ -221,57 +221,6 @@ class database_manager {
return ($this->find_index_name($xmldb_table, $xmldb_index) !== false);
}
/**
* Given one xmldb_field, the function returns the name of the check constraint in DB (if exists)
* of false if it doesn't exist. Note that XMLDB limits the number of check constraints per field
* to 1 "enum-like" constraint. So, if more than one is returned, only the first one will be
* retrieved by this function.
*
* @todo MDL-31147 Moodle 2.1 - Drop find_check_constraint_name()
*
* @param xmldb_table $xmldb_table The table to be searched.
* @param xmldb_field $xmldb_field The field to be searched.
* @return string|bool check constraint name or false
*/
public function find_check_constraint_name(xmldb_table $xmldb_table, xmldb_field $xmldb_field) {
/// Check the table exists
if (!$this->table_exists($xmldb_table)) {
throw new ddl_table_missing_exception($xmldb_table->getName());
}
/// Check the field exists
if (!$this->field_exists($xmldb_table, $xmldb_field)) {
throw new ddl_field_missing_exception($xmldb_field->getName(), $xmldb_table->getName());
}
/// Get list of check_constraints in table/field
$checks = false;
if ($objchecks = $this->generator->getCheckConstraintsFromDB($xmldb_table, $xmldb_field)) {
/// Get only the 1st element. Shouldn't be more than 1 under XMLDB
$objcheck = array_shift($objchecks);
if ($objcheck) {
$checks = strtolower($objcheck->name);
}
}
/// Arriving here, check not found
return $checks;
}
/**
* Given one xmldb_field, check if it has a check constraint in DB
*
* TODO: Moodle 2.1 - Drop check_constraint_exists()
*
* @param xmldb_table $xmldb_table The table.
* @param xmldb_field $xmldb_field The field to be searched for any existing constraint.
* @return boolean true/false
*/
public function check_constraint_exists(xmldb_table $xmldb_table, xmldb_field $xmldb_field) {
return ($this->find_check_constraint_name($xmldb_table, $xmldb_field) !== false);
}
/**
* This function IS NOT IMPLEMENTED. ONCE WE'LL BE USING RELATIONAL
* INTEGRITY IT WILL BECOME MORE USEFUL. FOR NOW, JUST CALCULATE "OFFICIAL"
@@ -707,37 +656,6 @@ class database_manager {
$this->execute_sql_arr($sqlarr);
}
/**
* This function will drop the existing enum of the field in the table passed as arguments
*
* TODO: Moodle 2.1 - Drop drop_enum_from_field()
*
* @param xmldb_table $xmldb_table Table object (just the name is mandatory).
* @param xmldb_field $xmldb_field Index object (full specs are required).
* @return void
*/
public function drop_enum_from_field(xmldb_table $xmldb_table, xmldb_field $xmldb_field) {
if (!$this->table_exists($xmldb_table)) {
throw new ddl_table_missing_exception($xmldb_table->getName());
}
/// Check the field exists
if (!$this->field_exists($xmldb_table, $xmldb_field)) {
throw new ddl_field_missing_exception($xmldb_field->getName(), $xmldb_table->getName());
}
if (!$this->check_constraint_exists($xmldb_table, $xmldb_field)) {
debugging('Enum for ' . $xmldb_table->getName() . '->' . $xmldb_field->getName() .
' does not exist. Delete skipped', DEBUG_DEVELOPER);
return; //Enum does not exist, nothing to delete
}
if (!$sqlarr = $this->generator->getDropEnumSQL($xmldb_table, $xmldb_field)) {
return; //Empty array = nothing to do = no error
}
$this->execute_sql_arr($sqlarr);
}
/**
* This function will rename the field in the table passed as arguments
* Before renaming the field, the function will check it exists