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- Path: sparky!uunet!olivea!gossip.pyramid.com!pyramid!infmx!cortesi
- From: cortesi@informix.com (David Cortesi)
- Newsgroups: comp.databases.informix
- Subject: making isql output horizontal
- Message-ID: <1992Dec31.210423.20141@informix.com>
- Date: 31 Dec 92 21:04:23 GMT
- Sender: news@informix.com (Usenet News)
- Organization: Informix Software, Inc.
- Lines: 167
-
- Since I first posted this, at least two people have posted requests
- for solutions to the problem of "flattening" ISQL output. For a long
- time I couldn't find this file, but finally it turned up. So here it
- is, maybe Walt can stow it safely in his archive at Emory U?
-
- #
- # reform.isql.output.awk
- #
- # An awk program to reformat an Informix-ISQL output listing,
- # changing it from vertical format to horizontal report format.
- #
- # Usage:
- # gawk -f invsql [dpat="data-pattern"] [lpp=n] [hpat="head-pattern"]
- #
- # <data-pattern> is a printf() pattern to format the column values
- # <n> is the number of lines of data per page
- # <head-pattern> is a printf() pattern to format the column headings
- #
- # Headings are printed only when lpp is specified as greater than zero.
- # See below for default heading and data patterns.
- #
- # As written, supports only 30 columns of output. See the end of the
- # program for how to expand this to more columns if required.
- #
- # Requires an "awk" that matches the book by Aho et.al, that is,
- # System V awk or Gnu awk -- not the obsolete awk shipped by Sun, NeXT, etc.
- #
- # Author: David Cortesi (cortesi@informix.com)
- #
- # --------------------- User's Guide (wysiwig!) --------------------------
- #
- # Standard input to invsql is an ISQL vertical-format report like this:
- #
- # order_num 1007
- # order_date 03/25/1989
- # customer_num 117
- # backlog n
- # po_num 278693
- # ship_date 04/23/1989
- # ship_weight 125.90
- #
- # We change it to horizontal format with optional page headings:
- #
- # order_num order_date customer_num backlog po_num ship_date ship_weight
- # 1007 03/25/1989 117 n 278693 04/28/1989 125.90
- # 1012 06/05/1989 117 n 278701 06/09/1989 70.80
- #
- # The program collects the column values from a group of input lines,
- # then prints one output line using a printf() like this:
- # printf(pattern,col1,col2,...,coln)
- # where each "col" is the string value of that column from the input.
- #
- # The default pattern is: "%nns %nns...\n" where each "nn" is the
- # default width of that column, which is: the larger of the width of
- # the heading text for that column, and the width of the data in that
- # column in the very first input group.
- #
- # The default is often wrong, but you can specify exact widths, and
- # control the format in many other ways, by specifying a printf()
- # pattern string as the command-line argument dpat="pattern".
- #
- # The program can print column headings at the top of each page of
- # data. The default is to NOT print headings -- you can paginate
- # the output using the pr(1) command for example. However if you
- # specify lpp=n, n>0, the program will print column headings before
- # each group of n data lines.
- #
- # The default column heading display is:
- # printf("\f%nns %nns...\n\n",col1,col2...coln)
- # where each "col" is the heading text of that column from the first
- # input group, and the "nn" values are as for the data pattern.
- # You can supply your own pattern using hpat="pattern" on the command line.
- #
- # When writing printf patterns as part of c-shell commands you need
- # only write the string in quotes, like this: dpat="%-5d\t%20f\n"
- # (The c shell does not object to backslashes in such quotes.)
- #
- # --------------------- The Program --------------------------
-
- BEGIN { state = 0; colno = 0; recno = 0 }
-
- # Leading blank lines: ignore them
-
- state == 0 && $1 == "" { next }
-
- # First data line of first group: note the length of the prefix
- # (the total width of heading and spaces), which is the same on each line,
- # even when the data value on a line is null.
-
- state == 0 && $1 != "" {
- match($0,/^[^ ]+ */)
- pfxlen = RLENGTH+1
- state = 1 # now into first data record
- }
-
- # Any data line of any group: save the string value of the data line,
- # which is the whole line to the right of the prefix. Data is saved
- # in the array v[1..n].
-
- $1 != "" {
- v[++colno] = substr($0,pfxlen)
- }
-
- # Any data line of the first data record: save the column name
- # as well, and set the default length of this column. Column
- # names are saved in array h[1..n], and lengths in dlen[1..n].
-
- state == 1 && $1 != "" {
- h[colno] = $1
- lh = length($1)
- lv = length(v[colno])
- dlen[colno] = (lh > lv)?lh:lv
- }
-
- # End of first input group (empty line in state==1): build the
- # default print patterns, or use the supplied ones.
-
- state == 1 && $1 == "" {
- pl = 0 # no pagination
- if (lpp > 0) pl = lpp
- pd = ""
- for( j = 1; j <= colno; ++j ) pd = pd "%" dlen[j] "s "
- sub(" $","\n",pd)
- ph = "\f" pd "\n"
- if (dpat != "") pd = fixup(dpat)
- if (hpat != "") {
- ph = fixup(hpat)
- if (pl == 0) pl = 60
- }
- if (pl > 0) recno = pl-1 # force starting headings
- state = 2 # no more setting up to do
- }
-
- # End of any input group (empty line): print.
-
- $1 == "" {
- # the printf statements have to list every possible column 1..colno
- # Columns that do not exist generate no output (because there's no
- # format for them in the pattern :) and awk does not object to you
- # referring to empty array elements. To support more columns, add
- # more lines to the printf statements below, following the same pattern.
-
- if ( ++recno == pl ) { # only succeeds when pl > 0
- printf ph \
- ,h[1],h[2],h[3],h[4],h[5],h[6],h[7],h[8],h[9],h[10] \
- ,h[11],h[12],h[13],h[14],h[15],h[16],h[17],h[18],h[19],h[20] \
- ,h[21],h[22],h[23],h[24],h[25],h[26],h[27],h[28],h[29],h[30]
- recno = 0
- }
- printf pd \
- ,v[1],v[2],v[3],v[4],v[5],v[6],v[7],v[8],v[9],v[10] \
- ,v[11],v[12],v[13],v[14],v[15],v[16],v[17],v[18],v[19],v[20] \
- ,v[21],v[22],v[23],v[24],v[25],v[26],v[27],v[28],v[29],v[30]
- }
-
- # As received from the command line, the print patterns still have
- # literally "\n" instead of a newline. Convert the 5 possible format
- # effectors to the real things.
-
- function fixup(pat) {
- gsub("\\\\f","\f",pat)
- gsub("\\\\n","\n",pat)
- gsub("\\\\r","\r",pat)
- gsub("\\\\t","\t",pat)
- gsub("\\\\v","\v",pat)
- return pat
- }
-