Index: includes/database.pgsql.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/Attic/database.pgsql.inc,v
retrieving revision 1.68.2.9
diff -u -r1.68.2.9 database.pgsql.inc
--- includes/database.pgsql.inc	28 May 2010 15:02:16 -0000	1.68.2.9
+++ includes/database.pgsql.inc	15 Dec 2010 16:14:58 -0000
@@ -383,6 +383,12 @@
 
 /**
  * Check if a table exists.
+ *
+ * @param $table
+ *   The name of the table.
+ *
+ * @return
+ *   TRUE if the table exists, and FALSE if the table does not exist.
  */
 function db_table_exists($table) {
   return (bool) db_result(db_query("SELECT COUNT(*) FROM pg_class WHERE relname = '{". db_escape_table($table) ."}'"));
@@ -390,6 +396,14 @@
 
 /**
  * Check if a column exists in the given table.
+ *
+ * @param $table
+ *   The name of the table.
+ * @param $column
+ *   The name of the column.
+ *
+ * @return
+ *   TRUE if the column exists, and FALSE if the column does not exist.
  */
 function db_column_exists($table, $column) {
   return (bool) db_result(db_query("SELECT COUNT(pg_attribute.attname) FROM pg_class, pg_attribute WHERE pg_attribute.attrelid = pg_class.oid AND pg_class.relname = '{". db_escape_table($table) ."}' AND attname = '". db_escape_table($column) ."'"));
Index: includes/database.mysql.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/Attic/database.mysql.inc,v
retrieving revision 1.89.2.2
diff -u -r1.89.2.2 database.mysql.inc
--- includes/database.mysql.inc	1 Feb 2010 16:32:10 -0000	1.89.2.2
+++ includes/database.mysql.inc	15 Dec 2010 16:14:57 -0000
@@ -169,6 +169,7 @@
  *
  * @param $result
  *   A database query result resource, as returned from db_query().
+ * 
  * @return
  *   The resulting field or FALSE.
  */
@@ -337,6 +338,12 @@
 
 /**
  * Check if a table exists.
+ *
+ * @param $table
+ *   The name of the table.
+ *
+ * @return
+ *   TRUE if the table exists, and FALSE if the table does not exist.
  */
 function db_table_exists($table) {
   return (bool) db_fetch_object(db_query("SHOW TABLES LIKE '{". db_escape_table($table) ."}'"));
@@ -344,6 +351,14 @@
 
 /**
  * Check if a column exists in the given table.
+ *
+ * @param $table
+ *   The name of the table.
+ * @param $column
+ *   The name of the column.
+ *
+ * @return
+ *   TRUE if the column exists, and FALSE if the column does not exist.
  */
 function db_column_exists($table, $column) {
   return (bool) db_fetch_object(db_query("SHOW COLUMNS FROM {". db_escape_table($table) ."} LIKE '". db_escape_table($column) ."'"));
Index: includes/database.mysqli.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/Attic/database.mysqli.inc,v
retrieving revision 1.54.2.2
diff -u -r1.54.2.2 database.mysqli.inc
--- includes/database.mysqli.inc	1 Feb 2010 16:32:10 -0000	1.54.2.2
+++ includes/database.mysqli.inc	15 Dec 2010 16:14:57 -0000
@@ -339,6 +339,12 @@
 
 /**
  * Check if a table exists.
+ *
+ * @param $table
+ *   The name of the table.
+ *
+ * @return
+ *   TRUE if the table exists, and FALSE if the table does not exist.
  */
 function db_table_exists($table) {
   return (bool) db_fetch_object(db_query("SHOW TABLES LIKE '{". db_escape_table($table) ."}'"));
@@ -346,6 +352,14 @@
 
 /**
  * Check if a column exists in the given table.
+ *
+ * @param $table
+ *   The name of the table.
+ * @param $column
+ *   The name of the column.
+ *
+ * @return
+ *   TRUE if the column exists, and FALSE if the column does not exist.
  */
 function db_column_exists($table, $column) {
   return (bool) db_fetch_object(db_query("SHOW COLUMNS FROM {". db_escape_table($table) ."} LIKE '". db_escape_table($column) ."'"));