Fix #34 - Created rule G-2145 and G-3115 about self-assignment of variables and columns.

Author: kibeha

docs/4-language-usage/2-variables-and-types/1-general/g-2145.md

@@ -0,0 +1,34 @@
+# G-2145: Never self-assign a variable.
+
+!!! tip "Minor"
+    Maintainability
+
+## Reason
+
+There is no reason to assign a variable to itself. It is either a redundant statement that should be removed, or it is a mistake where some other value was intended in the assignment.
+
+## Example (bad)
+
+``` sql
+declare
+   l_function_result pls_integer;
+   l_parallel_degree pls_integer;
+begin
+   l_function_result := maintenance.get_config('parallel_degree');
+   l_parallel_degree := l_parallel_degree;
+end;
+/
+```
+
+## Example (good)
+
+``` sql
+declare
+   l_function_result pls_integer;
+   l_parallel_degree pls_integer;
+begin
+   l_function_result := maintenance.get_config('parallel_degree');
+   l_parallel_degree := l_function_result;
+end;
+/
+```

docs/4-language-usage/3-dml-and-sql/1-general/g-3115.md

@@ -0,0 +1,24 @@
+# G-3115: Avoid self-assigning a column.
+
+!!! tip "Minor"
+    Maintainability
+
+## Reason
+
+There is normally no reason to assign a column to itself. It is either a redundant statement that should be removed, or it is a mistake where some other value was intended in the assignment.
+
+One exception to this rule can be when you attempt to fire cross edition triggers when using Edition Based Redefinition.
+
+## Example (bad)
+
+``` sql
+update employees
+   set first_name = first_name;
+```
+
+## Example (good)
+
+``` sql
+update employees
+   set first_name = initcap(first_name);
+```