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Annotation of 42BSD/ingres/doc/other/v5v6diff.nr, revision 1.1

1.1     ! root        1: .de HE 'Version six changes'INGRES'%'
        !             2: .so nmacs
        !             3: Users of INGRES version five should be aware of certain differences
        !             4: between version five and version six.
        !             5: Version six fixes all the known bugs that were in version five.
        !             6: Some of these fixes and improvements might cause
        !             7: some version five queries to not run correctly on version six.
        !             8: For this reason, we have itemized the changes which
        !             9: you should be aware of.
        !            10: Refer to the new version six reference manual for additional details.
        !            11: 
        !            12: .sh 1
        !            13: Storage Structures.
        !            14: .dn
        !            15: Incompatibilities.
        !            16: .PS
        !            17: Version six of INGRES will NOT run on a
        !            18: version five data base.
        !            19: All data bases must be recreated.
        !            20: There is a utility program called
        !            21: "copydb5" which aids in the 
        !            22: conversion process.
        !            23: Refer to the INGRES reference manual
        !            24: under copydb(UNIX) for documentation
        !            25: on how to use copydb5.
        !            26: .sh 1
        !            27: Monitor
        !            28: .dn
        !            29: Different working directory
        !            30: .PS
        !            31: The monitor now runs in the working
        !            32: directory where the user was at the
        !            33: time INGRES was invoked.
        !            34: This means that when you escape to the
        !            35: shell or the editor, you will
        !            36: be in the same working directory as
        !            37: when you invoked INGRES.
        !            38: .sh
        !            39: Auto-clear mode
        !            40: .PS
        !            41: The version five monitor required you to
        !            42: reset the workspace after a query ("\\r").
        !            43: The version six monitor does approximately
        !            44: the opposite.
        !            45: 
        !            46: If the first line after a query does NOT
        !            47: begin with the command "\\p", "\\g", "\\e", or "\\a", then
        !            48: the monitor automatically resets the workspace
        !            49: for you.
        !            50: Otherwise, the command is interpreted and new lines are
        !            51: appended to the workspace.
        !            52: The autoclear feature can be suppressed by using
        !            53: the "-a" flag when invoking INGRES.
        !            54: Once you use the autoclear feature for a while,
        !            55: however, you will really appreciate it.
        !            56: .sh
        !            57: Rubout works! (nearly always)
        !            58: .PS
        !            59: Typing a rubout or break causes INGRES to
        !            60: stop what it is doing and return cleanly
        !            61: to the monitor.
        !            62: If a rubout is typed during a modify or defered
        !            63: update, a message is issued and further rubouts
        !            64: are ignored until the processing is complete.
        !            65: 
        !            66: Many critical sections in the INGRES
        !            67: code still exist
        !            68: where typing a rubout can cause a
        !            69: SYSERR message.
        !            70: Those are being cleaned out on a gradual basis.
        !            71: In general rubout processing works correctly and in
        !            72: any case will never hurt the data base if all
        !            73: you are doing is a retrieve
        !            74: or a print.
        !            75: .sh 1
        !            76: Parser
        !            77: .dn
        !            78: New keywords and features.
        !            79: .PS
        !            80: We have implemented two new commands:
        !            81: CONCAT and ASCII.
        !            82: Those words are now reserved words.
        !            83: ASCII converts a numeric of any type to
        !            84: a character string.
        !            85: CONCAT takes two character strings and forms
        !            86: a new one.
        !            87: Trailing blanks of the first character string are
        !            88: removed before concatenating the second string.
        !            89: .sh
        !            90: The shorthand notation x.all.
        !            91: .PS
        !            92: ALL can be used in retrieves and appends.
        !            93: Its meaning expands to be all domains of
        !            94: a relation.
        !            95: The order of the domains is nearly always the
        !            96: same as the order from the create statement;
        !            97: however, this is not presently guaranteed.
        !            98: .sh
        !            99: Pattern matching
        !           100: .PS
        !           101: We have implemented the "shell syntax" pattern
        !           102: matching characters "*", "?", "[]".
        !           103: They can be used in a qualification but not
        !           104: in a target list.
        !           105: Their special meaning
        !           106: can be turned off by preceding them with a
        !           107: "\\".
        !           108: .sh
        !           109: Correct precedence.
        !           110: .PS
        !           111: The parser now gives the correct precedence
        !           112: to numeric operators.
        !           113: It previously gave equal precedence
        !           114: to all numeric operators (+,*,**, etc.).
        !           115: .sh 1
        !           116: Copy
        !           117: .dn
        !           118: File modes.
        !           119: .PS
        !           120: The previous version of copy created files
        !           121: owned as INGRES in mode 666, and demanded
        !           122: that any file to be read must be
        !           123: readable by INGRES.
        !           124: 
        !           125: The version six copy
        !           126: runs as the user.
        !           127: Thus on coping into a relation, the
        !           128: UNIX file need be readable only by the
        !           129: real users.
        !           130: On a copy out of a relation, the file
        !           131: is created in mode 600 and is owned by the
        !           132: real user.
        !           133: .sh
        !           134: Copy "into" works correctly.
        !           135: .PS
        !           136: The version five "copy into" ignored the
        !           137: order of the domains and demanded that
        !           138: all domains be present and in the
        !           139: identical format as the relation.
        !           140: 
        !           141: The version six copy eliminates all those
        !           142: restriction, both on copy into and copy from.
        !           143: .sh 1
        !           144: Help
        !           145: .dn
        !           146: Help on a relation/manual is changed.
        !           147: .PS
        !           148: We have reversed the use of the help command.
        !           149: Relations names should be given without
        !           150: quotes ("") and manual sections should
        !           151: include them.
        !           152: This is consistent with the print command.
        !           153: .sh
        !           154: Documentation reorganized.
        !           155: .PS
        !           156: The INGRES documentation has been subdivided
        !           157: into quel, unix, files and error sections.
        !           158: The help command no longer looks in /usr/man/...
        !           159: for documentation.
        !           160: .sh 2
        !           161: Help "" changed.
        !           162: .PS
        !           163: "Help" alone
        !           164: now lists relations
        !           165: in the database
        !           166: instead of the help page
        !           167: of the reference manual.
        !           168: Help ""
        !           169: no longer exists.
        !           170: .sh 1
        !           171: Purge
        !           172: .dn
        !           173: An easy way to clean up a data base
        !           174: .PS
        !           175: The purge command (formerly resetdb and relkiller) provides
        !           176: an easy way to see what relations have expired
        !           177: and also to remove any temporary files and
        !           178: relations which were left over after a system error.
        !           179: .sh 1
        !           180: The Users File.
        !           181: .dn
        !           182: The users file replaces the authority file
        !           183: .PS
        !           184: The users file specifies who can use INGRES,
        !           185: what data bases the user can use,
        !           186: special permissions the user has,
        !           187: any default flags the user wants.
        !           188: 
        !           189: The users file can provide some protection to
        !           190: a data base but is obviously insufficient.
        !           191: What protection it provides was implemented
        !           192: only because it was easy to provide and
        !           193: somewhat useful.
        !           194: .sh 1
        !           195: EQUEL
        !           196: .dn
        !           197: Recompilation
        !           198: .PS
        !           199: A version five equel program must
        !           200: be preprocessed again and then
        !           201: recompiled in order to run on
        !           202: a version six data base.
        !           203: 
        !           204: If you run an equel program without
        !           205: recompiling you will get
        !           206: an error message from INGRES informing
        !           207: you to redo your equel program.
        !           208: 
        !           209: If you only recompile and don't first
        !           210: run the equel preprocessor,
        !           211: you will get an undefined reference
        !           212: to "skiptup" at load time.
        !           213: 
        !           214: Again, simply run equel on all ".q"
        !           215: files and then recompile your programs.
        !           216: .sh
        !           217: Retrieving domains
        !           218: .PS
        !           219: The version five EQUEL allowed you to retrieve a numeric
        !           220: domains into a character variable.
        !           221: Version six does not allow this directly.
        !           222: The ASCII command can be used to perform this
        !           223: function.
        !           224: .sh
        !           225: The debug flag
        !           226: .PS
        !           227: Version five equel printed the file name and line
        !           228: number on an error.
        !           229: This required a lot of extra storage at run time.
        !           230: Version six equel has a "-d" flag which
        !           231: passes file and line information
        !           232: on an error.
        !           233: Otherwise, the information is not kept.
        !           234: .sh 1
        !           235: Miscellaneous.
        !           236: .dn
        !           237: Relation Names.
        !           238: .PS
        !           239: Version five relation names appended the users
        !           240: UNIX group and user id's to a relation name.
        !           241: INGRES user id's are now kept
        !           242: in the "users" file and are printing
        !           243: characters starting with "aa", "ab", and up.
        !           244: .sh
        !           245: Running as someone else.
        !           246: .PS
        !           247: For data base administrators with alter-ego
        !           248: problems, INGRES now lets you run as
        !           249: someone other than yourself.
        !           250: The "-u" flag can be used at the time
        !           251: INGRES is invoked to let you run as
        !           252: a different user.
        !           253: The "-u" flag may also be used
        !           254: by the "ingres" user.
        !           255: 
        !           256: The "-u" flag is also available
        !           257: in creatdb.
        !           258: It may only be used by the "ingres" user
        !           259: in this context.
        !           260: .sh
        !           261: The Blip is Gone.
        !           262: .PS
        !           263: Version five printed a space followed by a
        !           264: backspace, at the start of every query and
        !           265: dbu request.
        !           266: The "blip" was there for historical reasons
        !           267: only and has been removed.

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