From 4658307730c82874a73a9581da9194179f1b9b9a Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@bofh.bg>
Date: Fri, 16 Nov 2012 16:44:31 +0200
Subject: Improve DB field_data() for PostgreSQL

---
 .../drivers/pdo/subdrivers/pdo_dblib_driver.php    |  4 +--
 .../drivers/pdo/subdrivers/pdo_pgsql_driver.php    | 41 +++++++++++++++++-----
 .../drivers/pdo/subdrivers/pdo_sqlsrv_driver.php   |  4 +--
 3 files changed, 37 insertions(+), 12 deletions(-)

(limited to 'system/database/drivers/pdo')

diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
index 06120dcd8..cf049b61d 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
@@ -170,7 +170,7 @@ class CI_DB_pdo_dblib_driver extends CI_DB_pdo_driver {
 	{
 		return 'SELECT COLUMN_NAME
 			FROM INFORMATION_SCHEMA.Columns
-			WHERE TABLE_NAME = '.$this->escape($table);
+			WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
 	}
 
 	// --------------------------------------------------------------------
@@ -190,7 +190,7 @@ class CI_DB_pdo_dblib_driver extends CI_DB_pdo_driver {
 
 		$sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, NUMERIC_PRECISION, COLUMN_DEFAULT
 			FROM INFORMATION_SCHEMA.Columns
-			WHERE TABLE_NAME = '.$this->escape($table);
+			WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
 
 		if (($query = $this->query($sql)) === FALSE)
 		{
diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
index 41b50f0d6..21edeebbd 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
@@ -169,7 +169,7 @@ class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Show column query
+	 * List column query
 	 *
 	 * Generates a platform-specific query string so that the column names can be fetched
 	 *
@@ -178,22 +178,47 @@ class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver {
 	 */
 	protected function _list_columns($table = '')
 	{
-		return 'SELECT "column_name" FROM "information_schema"."columns" WHERE "table_name" = '.$this->escape($table);
+		return 'SELECT "column_name"
+			FROM "information_schema"."columns"
+			WHERE LOWER("table_name") = '.$this->escape(strtolower($table));
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * Field data query
-	 *
-	 * Generates a platform-specific query so that the column data can be retrieved
+	 * Returns an object with field data
 	 *
 	 * @param	string	$table
-	 * @return	string
+	 * @return	array
 	 */
-	protected function _field_data($table)
+	public function field_data($table = '')
 	{
-		return 'SELECT * FROM '.$this->protect_identifiers($table).' LIMIT 1';
+		if ($table === '')
+		{
+			return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
+		}
+
+		$sql = 'SELECT "column_name", "data_type", "character_maximum_length", "numeric_precision", "column_default"
+			FROM "information_schema"."columns"
+			WHERE LOWER("table_name") = '.$this->escape(strtolower($table));
+
+		if (($query = $this->query($sql)) === FALSE)
+		{
+			return FALSE;
+		}
+		$query = $query->result_object();
+
+		$retval = array();
+		for ($i = 0, $c = count($query); $i < $c; $i++)
+		{
+			$retval[$i]			= new stdClass();
+			$retval[$i]->name		= $query[$i]->column_name;
+			$retval[$i]->type		= $query[$i]->data_type;
+			$retval[$i]->max_length		= ($query[$i]->character_maximum_length > 0) ? $query[$i]->character_maximum_length : $query[$i]->numeric_precision;
+			$retval[$i]->default		= $query[$i]->column_default;
+		}
+
+		return $retval;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
index 93f30c82c..b28197cc9 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
@@ -199,7 +199,7 @@ class CI_DB_pdo_sqlsrv_driver extends CI_DB_pdo_driver {
 	{
 		return 'SELECT COLUMN_NAME
 			FROM INFORMATION_SCHEMA.Columns
-			WHERE TABLE_NAME = '.$this->escape($table);
+			WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
 	}
 
 	// --------------------------------------------------------------------
@@ -219,7 +219,7 @@ class CI_DB_pdo_sqlsrv_driver extends CI_DB_pdo_driver {
 
 		$sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, NUMERIC_PRECISION, COLUMN_DEFAULT
 			FROM INFORMATION_SCHEMA.Columns
-			WHERE TABLE_NAME = '.$this->escape($table);
+			WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
 
 		if (($query = $this->query($sql)) === FALSE)
 		{
-- 
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