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Now pulling non-primary/unique index data for PG as well... need to sort out conflicts with the other data and make foreign references work right :D

This commit is contained in:
Brion Vibber 2010-10-11 14:15:02 -07:00
parent f85511c28f
commit 5434f43176
1 changed files with 67 additions and 1 deletions
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68
lib/pgsqlschema.php
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@ -72,9 +72,14 @@ class PgsqlSchema extends Schema
throw new SchemaTableMissingException("No such table: $table");
}
// We'll need to match up fields by ordinal reference
$orderedFields = array();
foreach ($columns as $row) {
$name = $row['column_name'];
$orderedFields[$row['ordinal_position']] = $name;
$field = array();
// ??
@ -112,6 +117,38 @@ class PgsqlSchema extends Schema
$def['fields'][$name] = $field;
}
// Pulling index info from pg_class & pg_index
// This can provide us basic info on primary, unique, and multi-val keys
// But... it doesn't list plain constraints or foreign key constraints. :P
$indexInfo = $this->getIndexInfo($table);
foreach ($indexInfo as $row) {
$keyName = $row['key_name'];
// Dig the column references out!
$cols = array();
$colPositions = explode(' ', $row['indkey']);
foreach ($colPositions as $ord) {
// ordinal_position from above is 1-based
// but values in indkey are 0-based
if ($ord == 0) {
$cols[] = 'FUNCTION'; // @fixme
} else {
$cols[] = $orderedFields[$ord];
}
}
// @fixme foreign keys?
// @fixme prefixes?
// @fixme funky stuff like fulltext?
if ($row['indisprimary'] == 't') {
$def['primary key'] = $cols;
} else if ($row['indisunique'] == 't') {
$def['unique keys'][$keyName] = $cols;
} else {
$def['indexes'][$keyName] = $cols;
}
}
// Pull constraint data from INFORMATION_SCHEMA
// @fixme also find multi-val indexes
// @fixme distinguish the primary key
@ -120,6 +157,7 @@ class PgsqlSchema extends Schema
$keys = array();
foreach ($keyColumns as $row) {
var_dump($row);
$keyName = $row['constraint_name'];
$keyCol = $row['column_name'];
if (!isset($keys[$keyName])) {
@ -129,7 +167,18 @@ class PgsqlSchema extends Schema
}
foreach ($keys as $keyName => $cols) {
$def['unique indexes'][$keyName] = $cols;
// hack -- is this reliable?
if ($keyName == "{$table}_pkey") {
$def['xprimary key'] = $cols;
} else if (preg_match("/^{$table}_(.*)_fkey$/", $keyName, $matches)) {
$keys = array_keys($cols);
if (count($cols) == 1 && $cols[$keys[0]] == $keyName) {
$def['foreign keys'][$keyname][$matches[1]] = $keys[0];
}
$def['foreign keys'][$keyName][$matches[1]] = $cols;
} else {
$def['xunique indexes'][$keyName] = $cols;
}
}
return $def;
}
@ -152,6 +201,23 @@ class PgsqlSchema extends Schema
}
/**
* Pull some PG-specific index info
* @param string $table
* @return array of arrays
*/
function getIndexInfo($table)
{
$query = 'SELECT ' .
'(SELECT relname FROM pg_class WHERE oid=indexrelid) AS key_name, ' .
'* FROM pg_index ' .
'WHERE indrelid=(SELECT oid FROM pg_class WHERE relname=\'%s\') ' .
'ORDER BY indrelid, indexrelid';
$sql = sprintf($query, $table);
return $this->fetchQueryData($sql);
}
/**
*
* Creates a table with the given names and columns.
*
* @param string $name Name of the table