Concat

The Concat function will concatenate two or more strings from the source into a single string value on the target side.

As an example to illustrate one of these functions, consider the array concat function with respect to Table 3.

The built-in Concat function supports the specification of a prefix, postfix, and delimiters through its property page.

The second all-strings function similarly generates a conditional visitor that looks for a concat node with all string args.

There are a few common built-in functions that you can use within the Mapping Editor, such as Concat, Normalize, and Substring.

The print instruction emits the argument to standard output (stdout), and concat implements string concatenation.

SET CONCAT_NULL_YIELDS_NULL must be ON when you are creating or changing indexes on computed columns or indexed views.

Assuming the prefix is xyz, the XPath concat function call above creates the file name xyz-5-4. html for the fourth in the fifth of a .

However, you can change this behavior by changing the setting of CONCAT_NULL_YIELDS_NULL for the current session.

If SET CONCAT_NULL_YIELDS is not specified, the setting of the CONCAT_NULL_YIELDS_NULL database option applies.

New overloads for Path. Combine, String. Concat and String. Join have been added to accept parameter arrays.

When SET CONCAT_NULL_YIELDS_NULL is ON, concatenating a null value with a string yields a NULL result.

We add additional implementations for : concat and : compare-criteria.

When CONCAT_NULL_YIELDS_NULL is set to OFF, string concatenation across server boundaries cannot occur.

Think of input conditions that will cause concat_recursive to fail, so that the debugger might come in handy.

This is obvious in the Visitor implementation where you see all of the recursive calls to the eval-concat function.

Listing 7 is the complete implementation of the eval-concat multimethod.

Similar to our Java Visitor solution, we could implement an eval-concat operation for every node type in the tree using a multimethod.

The following example showing using both SET CONCAT_NULL_YIELDS_NULL settings.

This example builds up a small tree of nodes, then executes the multimethod eval-concat on those nodes to find a concat of string literals.

Note that the eval-concat in Listing 7 only partially solves our problem.

Begin by creating a recursive concat function.

All of the actual tree modification is isolated in the : concat defmethod.

Listing 8 is an example of theeval-concat multimethod in use.

To achieve the required output in the example shown in Table 1, you can use a Concat transform with the following properties

Fixed concat function fails when a parameter contains a comma, and using MaxResults

To achieve the required output in this case, a Concat transform could be used with the following properties