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Full Discussion: awk search syntax
Top Forums Shell Programming and Scripting awk search syntax Post 303043218 by migurus on Tuesday 21st of January 2020 01:17:52 PM
Old 01-21-2020
awk search syntax
I need help with understanding awk search feature.


Here I am trying to search by 4th field in this file:


Code:
$ cat xx
471013,A20,asd,100,FEATURE UNKNOWN
171014,A22,sdf,101,FEATURE WITH SUB-ELEMENT
172822,20X,xcv,102,SUB-ELEMENT
101102,22X,asd,103,CODED

When I try the search feature I get nothing:
Code:
$ awk -F, '/$4 ~ "101"/{print}' xx        

$

When I just use IF statement it works as expected:
Code:
$ awk -F, '{ if($4 == 101)print; }' xx
171014,A22,sdf,101,FEATURE WITH SUB-ELEMENT
$

Please help me understand what do I do wrong in using the search // syntax
Thanks
 

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LEARN ABOUT DEBIAN

bib1-attr

BIB-1 ATTRIBUTE SET(7)					   Conventions and miscellaneous				    BIB-1 ATTRIBUTE SET(7)

NAME

       bib1-attr - Bib-1 Attribute Set

DESCRIPTION

       This reference entry lists the Bib-1 attribute set types and values.

TYPES

       The Bib-1 attribute defines six attribute types: Use (1), Relation (2), Position (3), Structure (4), Truncation (5) and completeness (6).

USE (1)
	       1     Personal-name
	       2     Corporate-name
	       3     Conference-name
	       4     Title
	       5     Title-series
	       6     Title-uniform
	       7     ISBN
	       8     ISSN
	       9     LC-card-number
	       10    BNB-card-number
	       11    BGF-number
	       12    Local-number
	       13    Dewey-classification
	       14    UDC-classification
	       15    Bliss-classification
	       16    LC-call-number
	       17    NLM-call-number
	       18    NAL-call-number
	       19    MOS-call-number
	       20    Local-classification
	       21    Subject-heading
	       22    Subject-Rameau
	       23    BDI-index-subject
	       24    INSPEC-subject
	       25    MESH-subject
	       26    PA-subject
	       27    LC-subject-heading
	       28    RVM-subject-heading
	       29    Local-subject-index
	       30    Date
	       31    Date-of-publication
	       32    Date-of-acquisition
	       33    Title-key
	       34    Title-collective
	       35    Title-parallel
	       36    Title-cover
	       37    Title-added-title-page
	       38    Title-caption
	       39    Title-running
	       40    Title-spine
	       41    Title-other-variant
	       42    Title-former
	       43    Title-abbreviated
	       44    Title-expanded
	       45    Subject-precis
	       46    Subject-rswk
	       47    Subject-subdivision
	       48    Number-natl-biblio
	       49    Number-legal-deposit
	       50    Number-govt-pub
	       51    Number-music-publisher
	       52    Number-db
	       53    Number-local-call
	       54    Code-language
	       55    Code-geographic
	       56    Code-institution
	       57    Name-and-title
	       58    Name-geographic
	       59    Place-publication
	       60    CODEN
	       61    Microform-generation
	       62    Abstract
	       63    Note
	       1000  Author-title
	       1001  Record-type
	       1002  Name
	       1003  Author
	       1004  Author-name-personal
	       1005  Author-name-corporate
	       1006  Author-name-conference
	       1007  Identifier-standard
	       1008  Subject-LC-childrens
	       1009  Subject-name-personal
	       1010  Body-of-text
	       1011  Date/time-added-to-db
	       1012  Date/time-last-modified
	       1013  Authority/format-id
	       1014  Concept-text
	       1015  Concept-reference
	       1016  Any
	       1017  Server-choice
	       1018  Publisher
	       1019  Record-source
	       1020  Editor
	       1021  Bib-level
	       1022  Geographic-class
	       1023  Indexed-by
	       1024  Map-scale
	       1025  Music-key
	       1026  Related-periodical
	       1027  Report-number
	       1028  Stock-number
	       1030  Thematic-number
	       1031  Material-type
	       1032  Doc-id
	       1033  Host-item
	       1034  Content-type
	       1035  Anywhere
	       1036  Author-Title-Subject

RELATION (2)
	       1 Less than
	       2 Less than or equal
	       3 Equal
	       4 Greater or equal
	       5 Greater than
	       6 Not equal
	       100 Phonetic
	       101 Stem
	       102 Relevance
	       103 AlwaysMatches

POSITION (3)
	       1 First in field
	       2 First in subfield
	       3 Any position in field

STRUCTURE (4)
	       1 Phrase
	       2 Word
	       3 Key
	       4 Year
	       5 Date (normalized)
	       6 Word list
	       100 Date (un-normalized)
	       101 Name (normalized)
	       102 Name (un-normalized)
	       103 Structure
	       104 Urx
	       105 Free-form-text
	       106 Document-text
	       107 Local-number
	       108 String
	       109 Numeric-string

TRUNCATION (5)
	       1 Right truncation
	       2 Left truncation
	       3 Left and right truncation
	       100 Do not truncate
	       101 Process # in search term  . regular #=.*
	       102 RegExpr-1
	       103 RegExpr-2
	       104 Process # ?n . regular: #=., ?n=.{0,n} or ?=.* Z39.58

       Thw 105-106 truncation attributes below are only supported by Index Data's Zebra server.

	       105 Process * ! regular: *=.*, !=. and right truncate
	       106 Process * ! regular: *=.*, !=.

COMPLETENSS (6)
	       1 Incomplete subfield
	       2 Complete subfield
	       3 Complete field

SORTING (7)
	       1 ascending
	       2 descending

       Type 7 is an Index Data extension to RPN queries that allows embedding a sort critieria into a query.

SEE ALSO

       Bib-1 Attribute Set[1]

       Attibute Set Bib-1 Semantics[2].

NOTES

	1. Bib-1 Attribute Set
	   http://www.loc.gov/z3950/agency/defns/bib1.html

	2. Attibute Set Bib-1 Semantics
	   http://www.loc.gov/z3950/agency/bib1.html

YAZ 4.2.30							    04/16/2012						    BIB-1 ATTRIBUTE SET(7)
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