From 6d0fbeb0a7fde0cc8bae6c9944ea6b017d96968a Mon Sep 17 00:00:00 2001
From: Nathan Kinkade <nath@nkinka.de>
Date: Sun, 16 Mar 2008 20:42:30 +0000
Subject: Moved some external packages into lib to make system more self
 contained

---
 lib/adodb/pivottable.inc.php | 187 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 187 insertions(+)
 create mode 100644 lib/adodb/pivottable.inc.php

(limited to 'lib/adodb/pivottable.inc.php')

diff --git a/lib/adodb/pivottable.inc.php b/lib/adodb/pivottable.inc.php
new file mode 100644
index 0000000..0e0e7b1
--- /dev/null
+++ b/lib/adodb/pivottable.inc.php
@@ -0,0 +1,187 @@
+<?php
+/** 
+ * @version V4.93 10 Oct 2006 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
+ * Released under both BSD license and Lesser GPL library license. 
+ * Whenever there is any discrepancy between the two licenses, 
+ * the BSD license will take precedence. 
+ *
+ * Set tabs to 4 for best viewing.
+ * 
+*/
+
+/*
+ * Concept from daniel.lucazeau@ajornet.com. 
+ *
+ * @param db		Adodb database connection
+ * @param tables	List of tables to join
+ * @rowfields		List of fields to display on each row
+ * @colfield		Pivot field to slice and display in columns, if we want to calculate
+ *						ranges, we pass in an array (see example2)
+ * @where			Where clause. Optional.
+ * @aggfield		This is the field to sum. Optional. 
+ *						Since 2.3.1, if you can use your own aggregate function 
+ *						instead of SUM, eg. $aggfield = 'fieldname'; $aggfn = 'AVG';
+ * @sumlabel		Prefix to display in sum columns. Optional.
+ * @aggfn			Aggregate function to use (could be AVG, SUM, COUNT)
+ * @showcount		Show count of records
+ *
+ * @returns			Sql generated
+ */
+ 
+ function PivotTableSQL(&$db,$tables,$rowfields,$colfield, $where=false,
+ 	$aggfield = false,$sumlabel='Sum ',$aggfn ='SUM', $showcount = true)
+ {
+	if ($aggfield) $hidecnt = true;
+	else $hidecnt = false;
+	
+	$iif = strpos($db->databaseType,'access') !== false; 
+		// note - vfp 6 still doesn' work even with IIF enabled || $db->databaseType == 'vfp';
+	
+	//$hidecnt = false;
+	
+ 	if ($where) $where = "\nWHERE $where";
+	if (!is_array($colfield)) $colarr = $db->GetCol("select distinct $colfield from $tables $where order by 1");
+	if (!$aggfield) $hidecnt = false;
+	
+	$sel = "$rowfields, ";
+	if (is_array($colfield)) {
+		foreach ($colfield as $k => $v) {
+			$k = trim($k);
+			if (!$hidecnt) {
+				$sel .= $iif ? 
+					"\n\t$aggfn(IIF($v,1,0)) AS \"$k\", "
+					:
+					"\n\t$aggfn(CASE WHEN $v THEN 1 ELSE 0 END) AS \"$k\", ";
+			}
+			if ($aggfield) {
+				$sel .= $iif ?
+					"\n\t$aggfn(IIF($v,$aggfield,0)) AS \"$sumlabel$k\", "
+					:
+					"\n\t$aggfn(CASE WHEN $v THEN $aggfield ELSE 0 END) AS \"$sumlabel$k\", ";
+			}
+		} 
+	} else {
+		foreach ($colarr as $v) {
+			if (!is_numeric($v)) $vq = $db->qstr($v);
+			else $vq = $v;
+			$v = trim($v);
+			if (strlen($v) == 0	) $v = 'null';
+			if (!$hidecnt) {
+				$sel .= $iif ?
+					"\n\t$aggfn(IIF($colfield=$vq,1,0)) AS \"$v\", "
+					:
+					"\n\t$aggfn(CASE WHEN $colfield=$vq THEN 1 ELSE 0 END) AS \"$v\", ";
+			}
+			if ($aggfield) {
+				if ($hidecnt) $label = $v;
+				else $label = "{$v}_$aggfield";
+				$sel .= $iif ?
+					"\n\t$aggfn(IIF($colfield=$vq,$aggfield,0)) AS \"$label\", "
+					:
+					"\n\t$aggfn(CASE WHEN $colfield=$vq THEN $aggfield ELSE 0 END) AS \"$label\", ";
+			}
+		}
+	}
+	if ($aggfield && $aggfield != '1'){
+		$agg = "$aggfn($aggfield)";
+		$sel .= "\n\t$agg as \"$sumlabel$aggfield\", ";		
+	}
+	
+	if ($showcount)
+		$sel .= "\n\tSUM(1) as Total";
+	else
+		$sel = substr($sel,0,strlen($sel)-2);
+	
+	
+	// Strip aliases
+	$rowfields = preg_replace('/ AS (\w+)/i', '', $rowfields);
+	
+	$sql = "SELECT $sel \nFROM $tables $where \nGROUP BY $rowfields";
+	
+	return $sql;
+ }
+
+/* EXAMPLES USING MS NORTHWIND DATABASE */
+if (0) {
+
+# example1
+#
+# Query the main "product" table
+# Set the rows to CompanyName and QuantityPerUnit
+# and the columns to the Categories
+# and define the joins to link to lookup tables 
+# "categories" and "suppliers"
+#
+
+ $sql = PivotTableSQL(
+ 	$gDB,  											# adodb connection
+ 	'products p ,categories c ,suppliers s',  		# tables
+	'CompanyName,QuantityPerUnit',					# row fields
+	'CategoryName',									# column fields 
+	'p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID' # joins/where
+);
+ print "<pre>$sql";
+ $rs = $gDB->Execute($sql);
+ rs2html($rs);
+ 
+/*
+Generated SQL:
+
+SELECT CompanyName,QuantityPerUnit, 
+	SUM(CASE WHEN CategoryName='Beverages' THEN 1 ELSE 0 END) AS "Beverages", 
+	SUM(CASE WHEN CategoryName='Condiments' THEN 1 ELSE 0 END) AS "Condiments", 
+	SUM(CASE WHEN CategoryName='Confections' THEN 1 ELSE 0 END) AS "Confections", 
+	SUM(CASE WHEN CategoryName='Dairy Products' THEN 1 ELSE 0 END) AS "Dairy Products", 
+	SUM(CASE WHEN CategoryName='Grains/Cereals' THEN 1 ELSE 0 END) AS "Grains/Cereals", 
+	SUM(CASE WHEN CategoryName='Meat/Poultry' THEN 1 ELSE 0 END) AS "Meat/Poultry", 
+	SUM(CASE WHEN CategoryName='Produce' THEN 1 ELSE 0 END) AS "Produce", 
+	SUM(CASE WHEN CategoryName='Seafood' THEN 1 ELSE 0 END) AS "Seafood", 
+	SUM(1) as Total 
+FROM products p ,categories c ,suppliers s  WHERE p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID 
+GROUP BY CompanyName,QuantityPerUnit
+*/
+//=====================================================================
+
+# example2
+#
+# Query the main "product" table
+# Set the rows to CompanyName and QuantityPerUnit
+# and the columns to the UnitsInStock for diiferent ranges
+# and define the joins to link to lookup tables 
+# "categories" and "suppliers"
+#
+ $sql = PivotTableSQL(
+ 	$gDB,										# adodb connection
+ 	'products p ,categories c ,suppliers s',	# tables
+	'CompanyName,QuantityPerUnit',				# row fields
+												# column ranges
+array(										
+' 0 ' => 'UnitsInStock <= 0',
+"1 to 5" => '0 < UnitsInStock and UnitsInStock <= 5',
+"6 to 10" => '5 < UnitsInStock and UnitsInStock <= 10',
+"11 to 15"  => '10 < UnitsInStock and UnitsInStock <= 15',
+"16+" =>'15 < UnitsInStock'
+),
+	' p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID', # joins/where
+	'UnitsInStock', 							# sum this field
+	'Sum'										# sum label prefix
+);
+ print "<pre>$sql";
+ $rs = $gDB->Execute($sql);
+ rs2html($rs);
+ /*
+ Generated SQL:
+ 
+SELECT CompanyName,QuantityPerUnit, 
+	SUM(CASE WHEN UnitsInStock <= 0 THEN UnitsInStock ELSE 0 END) AS "Sum  0 ", 
+	SUM(CASE WHEN 0 < UnitsInStock and UnitsInStock <= 5 THEN UnitsInStock ELSE 0 END) AS "Sum 1 to 5", 
+	SUM(CASE WHEN 5 < UnitsInStock and UnitsInStock <= 10 THEN UnitsInStock ELSE 0 END) AS "Sum 6 to 10", 
+	SUM(CASE WHEN 10 < UnitsInStock and UnitsInStock <= 15 THEN UnitsInStock ELSE 0 END) AS "Sum 11 to 15", 
+	SUM(CASE WHEN 15 < UnitsInStock THEN UnitsInStock ELSE 0 END) AS "Sum 16+",
+	SUM(UnitsInStock) AS "Sum UnitsInStock", 
+	SUM(1) as Total 
+FROM products p ,categories c ,suppliers s  WHERE  p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID 
+GROUP BY CompanyName,QuantityPerUnit
+ */
+}
+?>
\ No newline at end of file
-- 
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