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ABENMESH_PATH_EXPRESSION - MESH PATH EXPRESSION
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- Mesh Path Expressions
... mesh_path ...
Effect
Specifies a mesh path mesh_path as a standalone mesh path expression at an operand position. The result of a mesh path expression is a line from the last path node of the mesh path described by the result of the mesh path and has the corresponding line type.
In the square brackets [ ... ] of each mesh association, an additional condition can be specified using col1 = ... col2 = .... If a path node contains multiple lines that fit the description, the first line found is read.
A mesh path expression is a special type of table expression and can be used in the same way as a table expression:
- Possible operand positions are all read and write positions listed for table expressions. In a write position, key fields of primary or secondary table keys of the last path node must not be overwritten.
- A chaining with the structure component selector (-) can be used to access a component of the read line.
If the follow-on node does not contain any lines that meet the condition in the square brackets [ ... ], the response is the same as in regular table expressions. In other words, the exception CX_SY_ITAB_LINE_NOT_FOUND is raised, except when used in the statement ASSIGN, in the predicate function line_exists, or in the table function line_index.
Note
Since the lines of a mesh node cannot have tabular components, a mesh path expression cannot have any chainings to other table expressions.
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