Friday, October 12, 2007

pl/sql package q&&a

j4package: access control -- achieved by declaration. This is A more important j4 than "grouping and code-organization". Access to what? [1]
j4package: fully-qualified-names -- to avoid namespace pollution.

#1 nlg pearl: - - > { spec-body } forms a twin for a pl/sql package.

a: short for "package specification", which appears before "CREATE OR REPLACE PACKAGE BODY". Stuff (what stuff? [1]) declared in a spec are "global" ie usable outside the pkg. What aren't? [2]
A: same meaning -- vars declared in a spec. Usable outside the pkg. Read online about why package-variables aren't persistent in http context.
A: "CREATE OR REPLACE PACKAGE my_pkg8 .." Note there's no "BODY". A spec has nothing to do with "DECLARE ...."
A: a "body", short for "PACKAGE BODY".
A: in your "schema", basically your login account (??? confirmed!)
q: what does a spec look like? How do I know i'm looking at a spec?
Q: what's a "spec" in pl/sql?
Q: what's the twin sister of a "spec"?
Q: what are package-variables && global variables?
Q: Where is a function saved if i don't have a package?
[1] vars, functions, procedures. Yes you can declare all of these in the spec
[2] stuff declared only in the body.

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