Changes between Version 78 and Version 79 of FAQ

Timestamp:

Nov 2, 2011, 12:13:12 PM (13 years ago)

Author:

Peter Baumann

Comment:

—

FAQ

@@ -116 +116 @@
 insert into FloatCollection values (float) inv_tiff( $1 )
 }}}
+
+=== How do I position a replacement array when updating a collection? ===
+
+ * In an update statement, the slice coordinates are specified with the set operator, however the 2D position of the replacement array is specified with the shift operator.
+   For example a query to update the 3D collection C with a 2D image of size 255x210 that should replace the region at interval [10, 100:355, 100:310]:
+{{{
+update C set [10, *:*, *:*] assign shift(inv_tiff($1), [10, 100])
+}}} 
 
 === How does the Storage Layout Language work? ===