Hi Seb,
I find this email difficult to parse. Could you take some extra time in
composition of these emails to distill the problem/question into a small
clear statement of a couple of sentences with a single <10 line example.
There is simply too much content below and without investing a great
deal of time I don't know which parts are germane to your question.
Thanks -- Eric
Sébastien Vauban <wxhgmqzgw...@spammotel.com> writes:
> #+TITLE: Make use of NoWeb with string replacement
> #+DATE: 2010-12-03
> #+LANGUAGE: en_US
>
> * Abstract
>
> Difficult to sum up. Though, questions turn around the reuse of code for
> tangle purpose (read: Noweb "calls") whose text must be replaced inside.
>
> Two real problems are also identified -- see
> [[*Important%20remarks][Important remarks]].
>
> * Somewhere in my local LOB
>
> (I'm beginning to "play" with one such file. Though, I've never succeeded
> copying a new snippet to it, using =C-c C-v i=, even when it's written it's
> successfully added)
>
> ** Add a column into a table
>
> #+srcname: add-column-in-table(table, column, type, nullability)
> #+begin_src sql
> -- add column `$column' (if column does not exist yet)
> IF NOT EXISTS (SELECT *
> FROM INFORMATION_SCHEMA.COLUMNS
> WHERE TABLE_NAME = '$table'
> AND COLUMN_NAME = '$column')
> BEGIN
> ALTER TABLE $table
> ADD $column $type $nullability
> END
> #+end_src
>
> ** Convert date to French format
>
> #+srcname: convert-date-to-French-format
> #+begin_src sql :var column :engine msosql
> CONVERT(varchar(10), $column, 103) AS $column
> #+end_src
>
> <<THERE>>
>
> =103= is the code for the "French" format =dd/mm/yyyy=.
>
> * Somewhere in my work file
>
> ** Add the following columns
>
> Create 3 new columns:
>
> #+results: sql-param
> | table | column | type | nullability |
> |-------------+---------+---------+-------------|
> | prestations | prsNbr1 | tinyint | NULL |
> | prestations | prsNbr2 | tinyint | NULL |
> | prestations | prsNbr3 | tinyint | NULL |
>
> *** Code snippet (to be tangled later on)
>
> I want to apply the values onto the following chunk of code:
>
> #+srcname: add-column-in-table(table, column, type, nullability)
> #+begin_src sql :results output
> -- add column `$column' (if column does not exist yet)
> IF NOT EXISTS (SELECT *
> FROM INFORMATION_SCHEMA.COLUMNS
> WHERE TABLE_NAME = '$table'
> AND COLUMN_NAME = '$column')
> BEGIN
> ALTER TABLE $table
> ADD $column $type $nullability
> END
> #+end_src
>
> *** Expanded code block
>
> Write out the result of the expansions:
>
> #+call: add-column-in-table(table=sql-param[2,0],
> column=sql-param[2,1], type=sql-param[2,2],
> nullability=sql-param[2,3])
>
> #+call: add-column-in-table(table=sql-param[3,0],
> column=sql-param[3,1], type=sql-param[3,2],
> nullability=sql-param[3,3])
>
> #+call: add-column-in-table(table=sql-param[4,0],
> column=sql-param[4,1], type=sql-param[4,2],
> nullability=sql-param[4,3])
>
> Pressing =C-c C-v C-e= on the above =#+call= lines shows me the following
> stack trace:
>
> #+begin_src emacs-lisp
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
> intern(nil)
> (let ((--cl-var-- ...)) (cond (... ...) (... ...) (... ...) (t ...)))
> (case (intern engine) ((quote msosql) (format "osql %s -s \" \" -i
> %s -o %s" ... ... ...)) ((quote mysql) (format "mysql %s -e \"source %s\" >
> %s" ... ... ...)) ((quote postgresql) (format "psql -A -P footer=off -F \"
> \" -f %s -o %s %s" ... ... ...)) (t (error "no support for the %s sql
> engine" engine)))
> (let* ((result-params ...) (cmdline ...) (engine ...) (in-file ...)
> (out-file ...) (command ...)) (with-temp-file in-file (insert ...)) (message
> command) (shell-command command) (search-forward "#+end_src") (forward-char
> 1) (insert "\n#+results:\n#+begin_example\n") (insert "#+end_example\n")
> (beginning-of-line) (previous-line) (insert-file-contents out-file))
> org-babel-execute:sql("-- add column `$column' (if column does not exist
> yet)\nIF NOT EXISTS (SELECT *\n FROM
> INFORMATION_SCHEMA.COLUMNS\n WHERE TABLE_NAME = '$table'\n
> AND COLUMN_NAME = '$column')\nBEGIN\n ALTER TABLE $table\n ADD
> $column $type $nullability\nEND\n" ((:var type . "tinyint") (:var table .
> "prestations") (:var column . "prsNbr1") (:var nullability . "NULL")
> (:colname-names) (:rowname-names) (:result-params "silent" "replace")
> (:result-type . value) (:comments . "") (:shebang . "") (:cache . "no")
> (:noweb . "no") (:tangle . "no") (:exports . "code") (:results . "silent")
> (:hlines . "no") (:session . "none") (:result-type . value) (:result-params
> "replace") (:rowname-names) (:colname-names)))
> funcall(org-babel-execute:sql "-- add column `$column' (if column does not
> exist yet)\nIF NOT EXISTS (SELECT *\n FROM
> INFORMATION_SCHEMA.COLUMNS\n WHERE TABLE_NAME = '$table'\n
> AND COLUMN_NAME = '$column')\nBEGIN\n ALTER TABLE $table\n ADD
> $column $type $nullability\nEND\n" ((:var type . "tinyint") (:var table .
> "prestations") (:var column . "prsNbr1") (:var nullability . "NULL")
> (:colname-names) (:rowname-names) (:result-params "silent" "replace")
> (:result-type . value) (:comments . "") (:shebang . "") (:cache . "no")
> (:noweb . "no") (:tangle . "no") (:exports . "code") (:results . "silent")
> (:hlines . "no") (:session . "none") (:result-type . value) (:result-params
> "replace") (:rowname-names) (:colname-names)))
> #+end_src
>
> ** Use date conversion code
>
> I would like to export, as results, the following snippet where the Noweb
> references are replaced by their correct SQL equivalent.
>
> I've tried using =code= or =output= as results, but that does not get me where
> I want to go.
>
> #+srcname: extract-data
> #+begin_src sql :engine mysql :noweb yes :results code
> SELECT TOP 5 tableID,
> etpNumber,
> <<convert-date-to-French-format(column="frmDate")>>,
> <<convert-date-to-French-format(column="signDate")>>
> FROM table
> #+end_src
>
> Good result would be:
>
> #+begin_src sql
> SELECT TOP 5 tableID,
> etpNumber,
> CONVERT(varchar(10), frmDate, 103) AS frmDate,
> CONVERT(varchar(10), signDate, 103) AS signDate
> FROM table
> #+end_src
>
> But, maybe, I'm expecting something that's not possible (yet)? Or I'm simply
> mixing concepts in my mind (tangling, evaluating)?
>
> * Important remarks
>
> Note here:
>
> - When *evaluating* the above block, it calls the command-line engine, and
> puts error results back somewhere above in this file: it goes to [[THERE]]
> (in
> section [[*Convert%20date%20to%20French%20format][Convert date to
> French format]])!
>
> - When executing, I've seen a *missing newline* just before =#+end_example=:
> it wasn't beginning on its own line.
>
> * Questions
>
> - When we're using snippets from different files, which BABEL file
> instructions are considered:
> + the one the snippet belongs to, or
> + the one where the snipped is used?
>
> - Would it be possible to add the speed commands (like =e=, =v=, etc.) onto
> the =#+call= lines?
>
> - Can I get somehow what I expect? Is that possible as of today?
>
> - Is the above the right way to do things?
>
> Best regards,
> Seb
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