Le 07/09/2013 21:22, Pavel Stehule a écrit :
>
>
>
> 2013/9/7 Gilles Darold <gilles.dar...@dalibo.com
> <mailto:gilles.dar...@dalibo.com>>
>
>     Le 07/09/2013 10:02, Pavel Stehule a écrit :
>     > Hello
>     >
>     > * patch is cleanly patchable and compilation is without warnings
>     > * all regression tests passed
>     > * no impact on dump, performance or any current features
>     > * no comments to programming style
>     > * we would this feature - it is consistent with \set and it gives a
>     > fast resume about psql printer settings
>     >
>     > Issues:
>     > 1) it doesn't show linestyle when is default
>     >
>     > I looked there and it is probably a small different issue - this
>     value
>     > is initialized as NULL as default. But I dislike a empty output in
>     > this case:
>     >
>     >     else if (strcmp(param, "linestyle") == 0)
>     >     {
>     >         if (!popt->topt.line_style)
>     >             ;
>     >         else
>     >             printf(_("Line style is %s.\n"),
>     >                    get_line_style(&popt->topt)->name);
>     >     }
>     >
>     > I propose a verbose result instead nothing:
>     >
>     >     else if (strcmp(param, "linestyle") == 0)
>     >     {
>     >         if (!popt->topt.line_style)
>     >            printf(_("Line style is unset.\n")) ;
>     >         else
>     >             printf(_("Line style is %s.\n"),
>     >                    get_line_style(&popt->topt)->name);
>     >     }
>
>     +1 to show the information even if linestyle is not set but by default
>     get_line_style() return "ascii" if linestyle is not set. So maybe
>     it is
>     better to  rewrite it as follow:
>
>         else if (strcmp(param, "linestyle") == 0)
>         {
>                 printf(_("Line style is %s.\n"),
>                        get_line_style(&popt->topt)->name);
>         }
>
>     This will output:
>
>         Line style is ascii.
>
>     when linestyle is not set or of course it is set to ascii.
>
>     > 2) there is only one open question
>     >
>     
> http://www.postgresql.org/message-id/b6f6fd62f2624c4c9916ac0175d56d880ce00...@jenmbs01.ad.intershop.net
>     > - there is no clean relation between output and some pset option.
>     >
>     > I don't think so Marc' proposal is ideal (these values are not a
>     > variables) - but maybe some enhanced output (only for this
>     resume) can
>     > be better:
>     >
>     > postgres=# \pset
>     > Output format (format) is aligned.
>     > Border style (border) is 1.
>     > Expanded display (expanded) is off.
>     > Null display (null) is "".
>     > Field separator (fieldsep) is "|".
>     > Tuples only (tuples_only) is off.
>     > Title (title) is unset.
>     > Table attributes (tableattr) unset.
>     > Pager (pager) is used for long output.
>     > Record separator (recordsep) is <newline>.
>     >
>     > This expanded output should be used only for this resume (not when a
>     > option was changed or individual ask on option value)
>
>     Yes this could be a good accommodation but I really prefer to not
>     duplicate code and translation between this resume and the output when
>     these options are set. If we can print the same output messages using:
>
>         postgres=# \pset fieldsep '|'
>         Field separator (fieldsep) is "|".
>
>     it could be a good compromise.
>
>
> ok
>
> Pavel

Hello,

Sorry for the delay, here is the new patch. The \pset output will look
like follow:

    postgres=# \pset
    Border style (border) is 1.
    Target width (columns) unset.
    Expanded display (expanded) is off.
    Field separator (fieldsep) is "|".
    Default footer (footer) is on.
    Output format (format) s aligned.
    Line style (linestyle) is ascii.
    Null display (null) is "".
    Locale-adjusted numeric output (numericlocale) is off.
    Pager (pager) is used for long output.
    Record separator (recordsep) is <newline>.
    Table attributes (tableattr) unset.
    Title (title) unset.
    Tuples only (tuples_only) is off.

    postgres=# \pset null #
    Null display (null) is "#".
    postgres=#


This also mean that all translation strings of those messages should be
updated.

If we don't want to modify those messages, I can provide an other patch
which print output as follow:

    postgres=# \pset
    border: Border style is 1.
    columns: Target width unset.
    expanded: Expanded display is off.
    fieldsep: Field separator is "|".
    footer: Default footer is on.
    format: Output format is aligned.
    linestyle: Line style is ascii.
    null: Null display is "".
    numericlocale: Locale-adjusted numeric output is off.
    pager: Pager is used for long output.
    recordsep: Record separator is <newline>.
    tableattr: Table attributes unset.
    title: Title unset.
    tuples_only: Tuples only is off.

    postgres=# \pset null #
    Null display is "#".
    postgres=#

I think the first output is better but it need translation work. Let me
know.

Regards,

-- 
Gilles Darold
Administrateur de bases de données
http://dalibo.com - http://dalibo.org

diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index 574db5c..ddf7bba 100644
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -2272,13 +2272,10 @@ lo_import 152801
         </para>
         </tip>
 
-        <note>
         <para>
-        It is an error to call <command>\pset</command> without any
-        arguments. In the future this case might show the current status
-        of all printing options.
+	<command>\pset</command> without any arguments displays current status
+	of all printing options.
         </para>
-        </note>
 
         </listitem>
       </varlistentry>
diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index 10e9f64..e044b73 100644
--- a/src/bin/psql/command.c
+++ b/src/bin/psql/command.c
@@ -68,6 +68,7 @@ static int	strip_lineno_from_funcdesc(char *func);
 static void minimal_error_message(PGresult *res);
 
 static void printSSLInfo(void);
+static bool printPsetInfo(const char *param, struct printQueryOpt *popt);
 
 #ifdef WIN32
 static void checkWin32Codepage(void);
@@ -1045,8 +1046,20 @@ exec_command(const char *cmd,
 
 		if (!opt0)
 		{
-			psql_error("\\%s: missing required argument\n", cmd);
-			success = false;
+		       size_t i;
+		       /* list all variables */
+		       static const char *const my_list[] = {
+				"border", "columns", "expanded", "fieldsep",
+				"footer", "format", "linestyle", "null",
+				"numericlocale", "pager", "recordsep",
+				"tableattr", "title", "tuples_only",
+				NULL };
+		       for (i = 0; my_list[i] != NULL; i++) {
+			       printPsetInfo(my_list[i], &pset.popt);
+		       }
+
+		       success = true;
+
 		}
 		else
 			success = do_pset(opt0, opt1, &pset.popt, pset.quiet);
@@ -2275,8 +2288,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			return false;
 		}
 
-		if (!quiet)
-			printf(_("Output format is %s.\n"), _align2string(popt->topt.format));
 	}
 
 	/* set table line style */
@@ -2296,9 +2307,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			return false;
 		}
 
-		if (!quiet)
-			printf(_("Line style is %s.\n"),
-				   get_line_style(&popt->topt)->name);
 	}
 
 	/* set border style/width */
@@ -2307,8 +2315,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 		if (value)
 			popt->topt.border = atoi(value);
 
-		if (!quiet)
-			printf(_("Border style is %d.\n"), popt->topt.border);
 	}
 
 	/* set expanded/vertical mode */
@@ -2320,15 +2326,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.expanded = ParseVariableBool(value);
 		else
 			popt->topt.expanded = !popt->topt.expanded;
-		if (!quiet)
-		{
-			if (popt->topt.expanded == 1)
-				printf(_("Expanded display is on.\n"));
-			else if (popt->topt.expanded == 2)
-				printf(_("Expanded display is used automatically.\n"));
-			else
-				printf(_("Expanded display is off.\n"));
-		}
 	}
 
 	/* locale-aware numeric output */
@@ -2338,13 +2335,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.numericLocale = ParseVariableBool(value);
 		else
 			popt->topt.numericLocale = !popt->topt.numericLocale;
-		if (!quiet)
-		{
-			if (popt->topt.numericLocale)
-				puts(_("Showing locale-adjusted numeric output."));
-			else
-				puts(_("Locale-adjusted numeric output is off."));
-		}
 	}
 
 	/* null display */
@@ -2355,8 +2345,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			free(popt->nullPrint);
 			popt->nullPrint = pg_strdup(value);
 		}
-		if (!quiet)
-			printf(_("Null display is \"%s\".\n"), popt->nullPrint ? popt->nullPrint : "");
 	}
 
 	/* field separator for unaligned text */
@@ -2368,13 +2356,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.fieldSep.separator = pg_strdup(value);
 			popt->topt.fieldSep.separator_zero = false;
 		}
-		if (!quiet)
-		{
-			if (popt->topt.fieldSep.separator_zero)
-				printf(_("Field separator is zero byte.\n"));
-			else
-				printf(_("Field separator is \"%s\".\n"), popt->topt.fieldSep.separator);
-		}
 	}
 
 	else if (strcmp(param, "fieldsep_zero") == 0)
@@ -2382,8 +2363,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 		free(popt->topt.fieldSep.separator);
 		popt->topt.fieldSep.separator = NULL;
 		popt->topt.fieldSep.separator_zero = true;
-		if (!quiet)
-			printf(_("Field separator is zero byte.\n"));
 	}
 
 	/* record separator for unaligned text */
@@ -2395,15 +2374,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.recordSep.separator = pg_strdup(value);
 			popt->topt.recordSep.separator_zero = false;
 		}
-		if (!quiet)
-		{
-			if (popt->topt.recordSep.separator_zero)
-				printf(_("Record separator is zero byte.\n"));
-			else if (strcmp(popt->topt.recordSep.separator, "\n") == 0)
-				printf(_("Record separator is <newline>."));
-			else
-				printf(_("Record separator is \"%s\".\n"), popt->topt.recordSep.separator);
-		}
 	}
 
 	else if (strcmp(param, "recordsep_zero") == 0)
@@ -2411,8 +2381,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 		free(popt->topt.recordSep.separator);
 		popt->topt.recordSep.separator = NULL;
 		popt->topt.recordSep.separator_zero = true;
-		if (!quiet)
-			printf(_("Record separator is zero byte.\n"));
 	}
 
 	/* toggle between full and tuples-only format */
@@ -2422,13 +2390,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.tuples_only = ParseVariableBool(value);
 		else
 			popt->topt.tuples_only = !popt->topt.tuples_only;
-		if (!quiet)
-		{
-			if (popt->topt.tuples_only)
-				puts(_("Showing only tuples."));
-			else
-				puts(_("Tuples only is off."));
-		}
 	}
 
 	/* set title override */
@@ -2439,14 +2400,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->title = NULL;
 		else
 			popt->title = pg_strdup(value);
-
-		if (!quiet)
-		{
-			if (popt->title)
-				printf(_("Title is \"%s\".\n"), popt->title);
-			else
-				printf(_("Title is unset.\n"));
-		}
 	}
 
 	/* set HTML table tag options */
@@ -2457,14 +2410,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.tableAttr = NULL;
 		else
 			popt->topt.tableAttr = pg_strdup(value);
-
-		if (!quiet)
-		{
-			if (popt->topt.tableAttr)
-				printf(_("Table attribute is \"%s\".\n"), popt->topt.tableAttr);
-			else
-				printf(_("Table attributes unset.\n"));
-		}
 	}
 
 	/* toggle use of pager */
@@ -2481,15 +2426,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.pager = 0;
 		else
 			popt->topt.pager = 1;
-		if (!quiet)
-		{
-			if (popt->topt.pager == 1)
-				puts(_("Pager is used for long output."));
-			else if (popt->topt.pager == 2)
-				puts(_("Pager is always used."));
-			else
-				puts(_("Pager usage is off."));
-		}
 	}
 
 	/* disable "(x rows)" footer */
@@ -2499,13 +2435,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.default_footer = ParseVariableBool(value);
 		else
 			popt->topt.default_footer = !popt->topt.default_footer;
-		if (!quiet)
-		{
-			if (popt->topt.default_footer)
-				puts(_("Default footer is on."));
-			else
-				puts(_("Default footer is off."));
-		}
 	}
 
 	/* set border style/width */
@@ -2513,9 +2442,167 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 	{
 		if (value)
 			popt->topt.columns = atoi(value);
+	}
+	else
+	{
+		psql_error("\\pset: unknown option: %s\n", param);
+		return false;
+	}
+
+       if (!quiet)
+	       printPsetInfo(param, &pset.popt);
+
+	return true;
+}
+
+
+static bool
+printPsetInfo(const char *param, struct printQueryOpt *popt)
+{
+	Assert(param != NULL);
 
-		if (!quiet)
-			printf(_("Target width is %d.\n"), popt->topt.columns);
+	/* show border style/width */
+	if (strcmp(param, "border") == 0)
+	{
+		if (!popt->topt.border)
+			puts(_("Border style (border) unset."));
+		else
+			printf(_("Border style (border) is %d.\n"),
+				popt->topt.border);
+	}
+
+	/* show the target width for the wrapped format */
+	else if (strcmp(param, "columns") == 0)
+	{
+		if (!popt->topt.columns)
+			puts(_("Target width (columns) unset."));
+		else
+			printf(_("Target width (columns) is %d.\n"),
+				popt->topt.columns);
+	}
+
+	/* show expanded/vertical mode */
+	else if (strcmp(param, "x") == 0 || strcmp(param, "expanded") == 0 || strcmp(param, "vertical") == 0)
+	{
+		if (popt->topt.expanded == 1)
+			printf(_("Expanded display (expanded) is on.\n"));
+		else if (popt->topt.expanded == 2)
+			printf(_("Expanded display (expanded) is used automatically.\n"));
+		else
+			printf(_("Expanded display (expanded) is off.\n"));
+	}
+
+	/* show field separator for unaligned text */
+	else if (strcmp(param, "fieldsep") == 0)
+	{
+		if (popt->topt.fieldSep.separator_zero)
+			printf(_("Field separator (fieldsep) is zero byte.\n"));
+		else
+			printf(_("Field separator (fieldsep) is \"%s\".\n"),
+				popt->topt.fieldSep.separator);
+	}
+
+	else if (strcmp(param, "fieldsep_zero") == 0)
+	{
+		printf(_("Field separator (fieldsep_zero) is zero byte.\n"));
+	}
+
+	/* show disable "(x rows)" footer */
+	else if (strcmp(param, "footer") == 0)
+	{
+		if (popt->topt.default_footer)
+			puts(_("Default footer (footer) is on."));
+		else
+			puts(_("Default footer (footer) is off."));
+	}
+
+	/* show format */
+	else if (strcmp(param, "format") == 0)
+	{
+		if (!popt->topt.format)
+			puts(_("Output format (format) is aligned."));
+		else
+			printf(_("Output format (format) s %s.\n"),
+				_align2string(popt->topt.format));
+	}
+
+	/* show table line style */
+	else if (strcmp(param, "linestyle") == 0)
+	{
+		printf(_("Line style (linestyle) is %s.\n"),
+			get_line_style(&popt->topt)->name);
+	}
+
+	/* show null display */
+	else if (strcmp(param, "null") == 0)
+	{
+		printf(_("Null display (null) is \"%s\".\n"),
+			popt->nullPrint ? popt->nullPrint : "");
+	}
+
+	/* show locale-aware numeric output */
+	else if (strcmp(param, "numericlocale") == 0)
+	{
+		if (popt->topt.numericLocale)
+			puts(_("Locale-adjusted numeric output (numericlocale) is on."));
+		else
+			puts(_("Locale-adjusted numeric output (numericlocale) is off."));
+	}
+
+	/* show toggle use of pager */
+	else if (strcmp(param, "pager") == 0)
+	{
+		if (popt->topt.pager == 1)
+			puts(_("Pager (pager) is used for long output."));
+		else if (popt->topt.pager == 2)
+			puts(_("Pager (pager) is always used."));
+		else
+			puts(_("Pager (pager) usage is off."));
+	}
+
+	/* show record separator for unaligned text */
+	else if (strcmp(param, "recordsep") == 0)
+	{
+		if (popt->topt.recordSep.separator_zero)
+			printf(_("Record separator (recordsep) is zero byte.\n"));
+		else if (strcmp(popt->topt.recordSep.separator, "\n") == 0)
+			printf(_("Record separator (recordsep) is <newline>.\n"));
+		else
+			printf(_("Record separator (recordsep) is \"%s\".\n"),
+				popt->topt.recordSep.separator);
+	}
+
+	else if (strcmp(param, "recordsep_zero") == 0)
+	{
+		printf(_("Record separator (recordsep_zero) is zero byte.\n"));
+	}
+
+	/* show HTML table tag options */
+	else if (strcmp(param, "T") == 0 || strcmp(param, "tableattr") == 0)
+	{
+		if (popt->topt.tableAttr)
+			printf(_("Table attribute (tableattr) is \"%s\".\n"),
+				popt->topt.tableAttr);
+		else
+			printf(_("Table attributes (tableattr) unset.\n"));
+	}
+
+	/* show title override */
+	else if (strcmp(param, "title") == 0)
+	{
+		if (popt->title)
+			printf(_("Title (title) is \"%s\".\n"), popt->title);
+		else
+			printf(_("Title (title) unset.\n"));
+	}
+
+	/* show toggle between full and tuples-only format */
+	else if (strcmp(param, "t") == 0 || strcmp(param, "tuples_only") == 0)
+	{
+		if (popt->topt.tuples_only)
+			puts(_("Tuples only (tuples_only) is on."));
+		else
+			puts(_("Tuples only (tuples_only) is off."));
 	}
 
 	else
@@ -2528,7 +2615,6 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 }
 
 
-
 #ifndef WIN32
 #define DEFAULT_SHELL "/bin/sh"
 #else
-- 
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