Yii2 Bootstrap 3
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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\pgsql;
use yii\db\TableSchema;
use yii\db\ColumnSchema;
/**
* Schema is the class for retrieving metadata from a PostgreSQL database
* (version 9.x and above).
*
* @author Gevik Babakhani <gevikb@gmail.com>
* @since 2.0
*/
class Schema extends \yii\db\Schema {
/**
* The default schema used for the current session. This value is
* automatically set to "public" by the PDO driver.
* @var string
*/
public static $DEFAULT_SCHEMA;
/**
* @var array mapping from physical column types (keys) to abstract
* column types (values)
*/
public $typeMap = array(
'abstime' => self::TYPE_TIMESTAMP,
//'aclitem' => self::TYPE_STRING,
'bit' => self::TYPE_STRING,
'boolean' => self::TYPE_BOOLEAN,
'box' => self::TYPE_STRING,
'character' => self::TYPE_STRING,
'bytea' => self::TYPE_BINARY,
'char' => self::TYPE_STRING,
//'cid' => self::TYPE_STRING,
'cidr' => self::TYPE_STRING,
'circle' => self::TYPE_STRING,
'date' => self::TYPE_DATE,
//'daterange' => self::TYPE_STRING,
'real' => self::TYPE_FLOAT,
'double precision' => self::TYPE_DECIMAL,
//'gtsvector' => self::TYPE_STRING,
'inet' => self::TYPE_STRING,
'smallint' => self::TYPE_SMALLINT,
'integer' => self::TYPE_INTEGER,
//'int4range' => self::TYPE_STRING, //unknown
'bigint' => self::TYPE_BIGINT,
//'int8range' => self::TYPE_STRING, // unknown
'interval' => self::TYPE_STRING,
'json' => self::TYPE_STRING,
'line' => self::TYPE_STRING,
//'lseg' => self::TYPE_STRING,
'macaddr' => self::TYPE_STRING,
'money' => self::TYPE_MONEY,
'name' => self::TYPE_STRING,
'numeric' => self::TYPE_STRING,
'numrange' => self::TYPE_DECIMAL,
'oid' => self::TYPE_BIGINT, // should not be used. it's pg internal!
'path' => self::TYPE_STRING,
//'pg_node_tree' => self::TYPE_STRING,
'point' => self::TYPE_STRING,
'polygon' => self::TYPE_STRING,
//'refcursor' => self::TYPE_STRING,
//'regclass' => self::TYPE_STRING,
//'regconfig' => self::TYPE_STRING,
//'regdictionary' => self::TYPE_STRING,
//'regoper' => self::TYPE_STRING,
//'regoperator' => self::TYPE_STRING,
//'regproc' => self::TYPE_STRING,
//'regprocedure' => self::TYPE_STRING,
//'regtype' => self::TYPE_STRING,
//'reltime' => self::TYPE_STRING,
//'smgr' => self::TYPE_STRING,
'text' => self::TYPE_TEXT,
//'tid' => self::TYPE_STRING,
'time without time zone' => self::TYPE_TIME,
'timestamp without time zone' => self::TYPE_TIMESTAMP,
'timestamp with time zone' => self::TYPE_TIMESTAMP,
'time with time zone' => self::TYPE_TIMESTAMP,
//'tinterval' => self::TYPE_STRING,
//'tsquery' => self::TYPE_STRING,
//'tsrange' => self::TYPE_STRING,
//'tstzrange' => self::TYPE_STRING,
//'tsvector' => self::TYPE_STRING,
//'txid_snapshot' => self::TYPE_STRING,
'unknown' => self::TYPE_STRING,
'uuid' => self::TYPE_STRING,
'bit varying' => self::TYPE_STRING,
'character varying' => self::TYPE_STRING,
//'xid' => self::TYPE_STRING,
'xml' => self::TYPE_STRING
);
/**
* Resolves the table name and schema name (if any).
* @param TableSchema $table the table metadata object
* @param string $name the table name
*/
protected function resolveTableNames($table, $name) {
$parts = explode('.', str_replace('"', '', $name));
if (isset($parts[1])) {
$table->schemaName = $parts[0];
$table->name = $parts[1];
} else {
$table->name = $parts[0];
}
if ($table->schemaName === null) {
$table->schemaName = self::$DEFAULT_SCHEMA;
}
}
/**
* Quotes a table name for use in a query.
* A simple table name has no schema prefix.
* @param string $name table name
* @return string the properly quoted table name
*/
public function quoteSimpleTableName($name) {
return strpos($name, '"') !== false ? $name : '"' . $name . '"';
}
/**
* Loads the metadata for the specified table.
* @param string $name table name
* @return TableSchema|null driver dependent table metadata. Null if the table does not exist.
*/
public function loadTableSchema($name) {
$table = new TableSchema();
$this->resolveTableNames($table, $name);
if ($this->findColumns($table)) {
$this->findConstraints($table);
return $table;
}
}
/**
* Collects the foreign key column details for the given table.
* @param TableSchema $table the table metadata
*/
protected function findConstraints($table) {
try {
$constraints = $this->db->createCommand($sql)->queryAll();
} catch (\Exception $e) {
return false;
}
foreach ($constraints as $constraint) {
$column = $this->loadColumnSchema($column);
$table->columns[$column->name] = $column;
}
return true;
}
/**
* Collects the metadata of table columns.
* @param TableSchema $table the table metadata
* @return boolean whether the table exists in the database
*/
protected function findColumns($table) {
$dbname = $this->db->quoteValue($this->db->pdo->getCurrentDatabase());
$tableName = $this->db->quoteValue($table->name);
$schemaName = $this->db->quoteValue($table->schemaName);
$sql = <<<SQL
SELECT
current_database() as table_catalog,
d.nspname AS table_schema,
c.relname AS table_name,
a.attname AS column_name,
t.typname AS data_type,
a.attlen AS character_maximum_length,
pg_catalog.col_description(c.oid, a.attnum) AS column_comment,
a.atttypmod AS modifier,
a.attnotnull = false AS is_nullable,
CAST(pg_get_expr(ad.adbin, ad.adrelid) AS varchar) AS column_default,
coalesce(pg_get_expr(ad.adbin, ad.adrelid) ~ 'nextval',false) AS is_autoinc,
array_to_string((select array_agg(enumlabel) from pg_enum where enumtypid=a.atttypid)::varchar[],',') as enum_values,
CASE atttypid
WHEN 21 /*int2*/ THEN 16
WHEN 23 /*int4*/ THEN 32
WHEN 20 /*int8*/ THEN 64
WHEN 1700 /*numeric*/ THEN
CASE WHEN atttypmod = -1
THEN null
ELSE ((atttypmod - 4) >> 16) & 65535
END
WHEN 700 /*float4*/ THEN 24 /*FLT_MANT_DIG*/
WHEN 701 /*float8*/ THEN 53 /*DBL_MANT_DIG*/
ELSE null
END AS numeric_precision,
CASE
WHEN atttypid IN (21, 23, 20) THEN 0
WHEN atttypid IN (1700) THEN
CASE
WHEN atttypmod = -1 THEN null
ELSE (atttypmod - 4) & 65535
END
ELSE null
END AS numeric_scale,
CAST(
information_schema._pg_char_max_length(information_schema._pg_truetypid(a, t), information_schema._pg_truetypmod(a, t))
AS numeric
) AS size,
a.attnum = any (ct.conkey) as is_pkey
FROM
pg_class c
LEFT JOIN pg_attribute a ON a.attrelid = c.oid
LEFT JOIN pg_attrdef ad ON a.attrelid = ad.adrelid AND a.attnum = ad.adnum
LEFT JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_namespace d ON d.oid = c.relnamespace
LEFT join pg_constraint ct on ct.conrelid=c.oid and ct.contype='p'
WHERE
a.attnum > 0
and c.relname = {$tableName}
and d.nspname = {$schemaName}
and current_database() = {$dbname}
ORDER BY
a.attnum;
SQL;
try {
$columns = $this->db->createCommand($sql)->queryAll();
} catch (\Exception $e) {
return false;
}
foreach ($columns as $column) {
$column = $this->loadColumnSchema($column);
$table->columns[$column->name] = $column;
}
return true;
}
/**
* Loads the column information into a [[ColumnSchema]] object.
* @param array $info column information
* @return ColumnSchema the column schema object
*/
protected function loadColumnSchema($info) {
$column = new ColumnSchema();
$column->allowNull = $info['is_nullable'];
$column->autoIncrement = $info['is_autoinc'];
$column->comment = $info['column_comment'];
$column->dbType = $info['data_type'];
$column->defaultValue = $info['column_default'];
$column->enumValues = explode(',', str_replace(array("''"), array("'"), $info['enum_values']));
$column->unsigned = false; // has no meanining in PG
$column->isPrimaryKey = $info['is_pkey'];
$column->name = $info['column_name'];
$column->precision = $info['numeric_precision'];
$column->scale = $info['numeric_scale'];
$column->size = $info['size'];
if (isset($this->typeMap[$column->dbType])) {
$column->type = $this->typeMap[$column->dbType];
} else {
$column->type = self::TYPE_STRING;
}
$column->phpType = $this->getColumnPhpType($column);
return $column;
}
}