pg_dumpall: Add a -E flag to set the encoding, like pg_dump has.

Michael Paquier, reviewed by Fabien Coelho

Discussion: http://postgr.es/m/CAB7nPqQcYWmrm2n-dVaMUhYPKFU_DxQwPuUGuC4ZF+8B=dS5xQ@mail.gmail.com

doc/src/sgml/ref/pg_dumpall.sgml

@@ -99,6 +99,19 @@ PostgreSQL documentation
       </listitem>
      </varlistentry>
 
+     <varlistentry>
+      <term><option>-E <replaceable class="parameter">encoding</replaceable></option></term>
+      <term><option>--encoding=<replaceable class="parameter">encoding</replaceable></option></term>
+      <listitem>
+       <para>
+        Create the dump in the specified character set encoding. By default,
+        the dump is created in the database encoding.  (Another way to get the
+        same result is to set the <envar>PGCLIENTENCODING</envar> environment
+        variable to the desired dump encoding.)
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry>
       <term><option>-f <replaceable class="parameter">filename</replaceable></option></term>
       <term><option>--file=<replaceable class="parameter">filename</replaceable></option></term>

src/bin/pg_dump/pg_dumpall.c

@@ -97,6 +97,7 @@ main(int argc, char *argv[])
 	static struct option long_options[] = {
 		{"data-only", no_argument, NULL, 'a'},
 		{"clean", no_argument, NULL, 'c'},
+		{"encoding", required_argument, NULL, 'E'},
 		{"file", required_argument, NULL, 'f'},
 		{"globals-only", no_argument, NULL, 'g'},
 		{"host", required_argument, NULL, 'h'},
@@ -147,6 +148,7 @@ main(int argc, char *argv[])
 	char	   *pguser = NULL;
 	char	   *pgdb = NULL;
 	char	   *use_role = NULL;
+	const char *dumpencoding = NULL;
 	trivalue	prompt_password = TRI_DEFAULT;
 	bool		data_only = false;
 	bool		globals_only = false;
@@ -204,7 +206,7 @@ main(int argc, char *argv[])
 
 	pgdumpopts = createPQExpBuffer();
 
-	while ((c = getopt_long(argc, argv, "acd:f:gh:l:oOp:rsS:tU:vwWx", long_options, &optindex)) != -1)
+	while ((c = getopt_long(argc, argv, "acd:E:f:gh:l:oOp:rsS:tU:vwWx", long_options, &optindex)) != -1)
 	{
 		switch (c)
 		{
@@ -221,6 +223,12 @@ main(int argc, char *argv[])
 				connstr = pg_strdup(optarg);
 				break;
 
+			case 'E':
+				dumpencoding = pg_strdup(optarg);
+				appendPQExpBufferStr(pgdumpopts, " -E ");
+				appendShellString(pgdumpopts, optarg);
+				break;
+
 			case 'f':
 				filename = pg_strdup(optarg);
 				appendPQExpBufferStr(pgdumpopts, " -f ");
@@ -453,6 +461,19 @@ main(int argc, char *argv[])
 	else
 		OPF = stdout;
 
+	/*
+	 * Set the client encoding if requested.
+	 */
+	if (dumpencoding)
+	{
+		if (PQsetClientEncoding(conn, dumpencoding) < 0)
+		{
+			fprintf(stderr, _("%s: invalid client encoding \"%s\" specified\n"),
+					progname, dumpencoding);
+			exit_nicely(1);
+		}
+	}
+
 	/*
 	 * Get the active encoding and the standard_conforming_strings setting, so
 	 * we know how to escape strings.
@@ -588,6 +609,7 @@ help(void)
 	printf(_("\nOptions controlling the output content:\n"));
 	printf(_("  -a, --data-only              dump only the data, not the schema\n"));
 	printf(_("  -c, --clean                  clean (drop) databases before recreating\n"));
+	printf(_("  -E, --encoding=ENCODING      dump the data in encoding ENCODING\n"));
 	printf(_("  -g, --globals-only           dump only global objects, no databases\n"));
 	printf(_("  -o, --oids                   include OIDs in dump\n"));
 	printf(_("  -O, --no-owner               skip restoration of object ownership\n"));