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rename_table() under postgresql completed

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This commit is contained in:
stronk7
2006-10-02 16:27:18 +00:00
parent 3033991184
commit 6c02f04b5a
1 changed files with 45 additions and 0 deletions
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45
lib/xmldb/classes/generators/postgres7/postgres7.class.php
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@ -152,6 +152,25 @@ class XMLDBpostgres7 extends XMLDBgenerator {
/// Rename de sequence
$results[] = 'ALTER TABLE ' . $oldseqname . ' RENAME TO ' . $newseqname;
/// Rename all the check constraints in the table
$oldtablename = $this->getTableName($xmldb_table);
$newtablename = $this->getTableName($newt);
$oldconstraintprefix = $this->getNameForObject($xmldb_table->getName(), '');
$newconstraintprefix = $this->getNameForObject($newt->getName(), '', '');
if ($constraints = $this->getCheckConstraintsFromDB($xmldb_table)) {
foreach ($constraints as $constraint) {
/// Drop the old constraint
$results[] = 'ALTER TABLE ' . $newtablename . ' DROP CONSTRAINT ' . $constraint->name;
/// Calculate the new constraint name
$newconstraintname = str_replace($oldconstraintprefix, $newconstraintprefix, $constraint->name);
/// Add the new constraint
$results[] = 'ALTER TABLE ' . $newtablename . ' ADD CONSTRAINT ' . $newconstraintname .
' CHECK (' . $constraint->description . ')';
}
}
return $results;
}
@ -375,6 +394,32 @@ class XMLDBpostgres7 extends XMLDBgenerator {
return $this->getAlterFieldSQL($xmldb_table, $xmldb_field);
}
/**
* Given one XMLDBTable returns one array with all the check constrainsts
* in the table (fetched from DB)
* Each element contains the name of the constraint and its description
* If no check constraints are found, returns an empty array
*/
function getCheckConstraintsFromDB($xmldb_table) {
$results = array();
$tablename = $this->getTableName($xmldb_table);
if ($constraints = get_records_sql("SELECT co.conname AS name, co.consrc AS description
FROM pg_constraint co,
pg_class cl
WHERE co.conrelid = cl.oid
AND co.contype = 'c'
AND cl.relname = '{$tablename}'")) {
foreach ($constraints as $constraint) {
$results[$constraint->name] = $constraint;
}
}
return $results;
}
/**
* Returns an array of reserved words (lowercase) for this DB
*/