Add "ATTR_EMULATE_PREPARES" general attribute to replace the custom

attributes employed by mysql and postgres drivers.
No functional change.

Author: wez

ext/pdo/pdo_dbh.c

@@ -1287,6 +1287,7 @@ void pdo_dbh_init(TSRMLS_D)
 	REGISTER_PDO_CLASS_CONST_LONG("ATTR_DRIVER_NAME",		(long)PDO_ATTR_DRIVER_NAME);
 	REGISTER_PDO_CLASS_CONST_LONG("ATTR_STRINGIFY_FETCHES",(long)PDO_ATTR_STRINGIFY_FETCHES);
 	REGISTER_PDO_CLASS_CONST_LONG("ATTR_MAX_COLUMN_LEN",(long)PDO_ATTR_MAX_COLUMN_LEN);
+	REGISTER_PDO_CLASS_CONST_LONG("ATTR_EMULATE_PREPARES",(long)PDO_ATTR_EMULATE_PREPARES);
 
 	REGISTER_PDO_CLASS_CONST_LONG("ERRMODE_SILENT",	(long)PDO_ERRMODE_SILENT);
 	REGISTER_PDO_CLASS_CONST_LONG("ERRMODE_WARNING",	(long)PDO_ERRMODE_WARNING);

ext/pdo/pdo_stmt.c

@@ -1633,6 +1633,17 @@ static PHP_METHOD(PDOStatement, setAttribute)
 
 /* {{{ proto mixed PDOStatement::getAttribute(long attribute)
    Get an attribute */
+
+static int generic_stmt_attr_get(pdo_stmt_t *stmt, zval *return_value, long attr)
+{
+	switch (attr) {
+		case PDO_ATTR_EMULATE_PREPARES:
+			RETVAL_BOOL(stmt->supports_placeholders == PDO_PLACEHOLDER_NONE);
+			return 1;
+	}
+	return 0;
+}
+   
 static PHP_METHOD(PDOStatement, getAttribute)
 {
 	long attr;
@@ -1643,8 +1654,12 @@ static PHP_METHOD(PDOStatement, getAttribute)
 	}
 
 	if (!stmt->methods->get_attribute) {
-		pdo_raise_impl_error(stmt->dbh, stmt, "IM001", "This driver doesn't support getting attributes" TSRMLS_CC);
-		RETURN_FALSE;
+		if (!generic_stmt_attr_get(stmt, return_value, attr)) {
+			pdo_raise_impl_error(stmt->dbh, stmt, "IM001",
+				"This driver doesn't support getting attributes" TSRMLS_CC);
+			RETURN_FALSE;
+		}
+		return;
 	}
 
 	PDO_STMT_CLEAR_ERR();
@@ -1654,9 +1669,13 @@ static PHP_METHOD(PDOStatement, getAttribute)
 			RETURN_FALSE;
 
 		case 0:
-			/* XXX: should do something better here */
-			pdo_raise_impl_error(stmt->dbh, stmt, "IM001", "driver doesn't support getting that attribute" TSRMLS_CC);
-			RETURN_FALSE;
+			if (!generic_stmt_attr_get(stmt, return_value, attr)) {
+				/* XXX: should do something better here */
+				pdo_raise_impl_error(stmt->dbh, stmt, "IM001",
+					"driver doesn't support getting that attribute" TSRMLS_CC);
+				RETURN_FALSE;
+			}
+			return;
 
 		default:
 			return;

ext/pdo/php_pdo_driver.h

@@ -44,7 +44,7 @@ PDO_API char *php_pdo_int64_to_str(pdo_int64_t i64 TSRMLS_DC);
 # define FALSE 0
 #endif
 
-#define PDO_DRIVER_API	20060327
+#define PDO_DRIVER_API	20060409
 
 enum pdo_param_type {
 	PDO_PARAM_NULL,
@@ -129,6 +129,7 @@ enum pdo_attribute_type {
 	PDO_ATTR_DRIVER_NAME,		  /* name of the driver (as used in the constructor) */
 	PDO_ATTR_STRINGIFY_FETCHES,	/* converts integer/float types to strings during fetch */
 	PDO_ATTR_MAX_COLUMN_LEN,	/* make database calculate maximum length of data found in a column */
+	PDO_ATTR_EMULATE_PREPARES,  /* use query emulation rather than native */
 
 	/* this defines the start of the range for driver specific options.
 	 * Drivers should define their own attribute constants beginning with this