Hi all,
The main goal of this patch is enable to an user the capability to store
options
(relations and attributes) related to extensions by using a fixed prefix
called 'ext' in
the defined name. It's cant be useful for replication solutions.
So, with this patch we can do that:
ALTER TABLE foo
SET (ext.somext.do_replicate=true);
When 'ext' is the fixed prefix, 'somext' is the extension name,
'do_replicate' is the
extension option and 'true' is the value.
Also we can use this form to define storage options to indexes and
per-attribute
options.
Regards,
--
Fabrízio de Royes Mello
Consultoria/Coaching PostgreSQL
>> Timbira: http://www.timbira.com.br
>> Blog sobre TI: http://fabriziomello.blogspot.com
>> Perfil Linkedin: http://br.linkedin.com/in/fabriziomello
>> Twitter: http://twitter.com/fabriziomello
diff --git a/doc/src/sgml/ref/alter_index.sgml b/doc/src/sgml/ref/alter_index.sgml
index d210077..bf4e196 100644
--- a/doc/src/sgml/ref/alter_index.sgml
+++ b/doc/src/sgml/ref/alter_index.sgml
@@ -82,6 +82,15 @@ ALTER INDEX [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> RESE
<xref linkend="SQL-REINDEX">
to get the desired effects.
</para>
+ <note>
+ <para>
+ A special prefix called '<replaceable class="PARAMETER">ext.</>' can be
+ used to define storage parameter. The storage parameters with this prefix
+ will be used by 'extensions'. Storage option nomenclature: ext.name.option=value
+ (ext=fixed prefix, name=extension name, option=option name and value=option value).
+ See example bellow.
+ </para>
+ </note>
</listitem>
</varlistentry>
@@ -202,6 +211,17 @@ ALTER INDEX distributors SET (fillfactor = 75);
REINDEX INDEX distributors;
</programlisting></para>
+ <para>
+ To set a storage parameter to be used by extensions:
+<programlisting>
+ALTER INDEX distributors
+ SET (ext.somext.do_replicate=true);
+</programlisting>
+ (ext=fixed prefix, somext=extension name, do_replicate=option name and
+ true=option value)
+</para>
+
+
</refsect1>
<refsect1>
diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index 89649a2..4756a58 100644
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@@ -213,6 +213,17 @@ ALTER TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable>
of statistics by the <productname>PostgreSQL</productname> query
planner, refer to <xref linkend="planner-stats">.
</para>
+
+ <note>
+ <para>
+ A special prefix called '<replaceable class="PARAMETER">ext.</>' can be used to
+ define per-attribute options. The attribute options with this prefix will be
+ used by 'extensions'. The attribute option nomenclature: ext.name.option=value
+ (ext=fixed prefix, name=extension name, option=option name and value=option value).
+ See the example bellow.
+ </para>
+ </note>
+
</listitem>
</varlistentry>
@@ -476,6 +487,11 @@ ALTER TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable>
<command>ALTER TABLE</> does not treat <literal>OIDS</> as a
storage parameter. Instead use the <literal>SET WITH OIDS</>
and <literal>SET WITHOUT OIDS</> forms to change OID status.
+ A special prefix called '<replaceable class="PARAMETER">ext.</>' can be
+ used to define storage parameter. The storage parameters with this prefix
+ will be used by 'extensions'. Storage option nomenclature: ext.name.option=value
+ (ext=fixed prefix, name=extension name, option=option name and value=option value).
+ See example bellow.
</para>
</note>
</listitem>
@@ -1112,6 +1128,26 @@ ALTER TABLE distributors DROP CONSTRAINT distributors_pkey,
ADD CONSTRAINT distributors_pkey PRIMARY KEY USING INDEX dist_id_temp_idx;
</programlisting></para>
+ <para>
+ To set a per-attribute option to be used by extensions:
+<programlisting>
+ALTER TABLE distributors
+ ALTER COLUMN dist_id SET (ext.somext.do_replicate=true);
+</programlisting>
+ (ext=fixed prefix, somext=extension name, do_replicate=option name and
+ true=option value)
+</para>
+
+ <para>
+ To set a storage parameter to be used by extensions:
+<programlisting>
+ALTER TABLE distributors
+ SET (ext.somext.do_replicate=true);
+</programlisting>
+ (ext=fixed prefix, somext=extension name, do_replicate=option name and
+ true=option value)
+</para>
+
</refsect1>
<refsect1>
diff --git a/src/backend/access/common/reloptions.c b/src/backend/access/common/reloptions.c
index b5fd30a..06c2b3a 100644
--- a/src/backend/access/common/reloptions.c
+++ b/src/backend/access/common/reloptions.c
@@ -275,6 +275,8 @@ static void initialize_reloptions(void);
static void parse_one_reloption(relopt_value *option, char *text_str,
int text_len, bool validate);
+static bool is_extension_namespace(char *namespace);
+
/*
* initialize_reloptions
* initialization routine, must be called before parsing
@@ -602,13 +604,15 @@ transformRelOptions(Datum oldOptions, List *defList, char *namspace,
/* Search for a match in defList */
foreach(cell, defList)
{
- DefElem *def = (DefElem *) lfirst(cell);
+ DefElem *def = (DefElem *) lfirst(cell);
int kw_len;
+ char *text_compare;
/* ignore if not in the same namespace */
if (namspace == NULL)
{
- if (def->defnamespace != NULL)
+ if (def->defnamespace != NULL &&
+ !is_extension_namespace(def->defnamespace))
continue;
}
else if (def->defnamespace == NULL)
@@ -617,8 +621,17 @@ transformRelOptions(Datum oldOptions, List *defList, char *namspace,
continue;
kw_len = strlen(def->defname);
+ if (is_extension_namespace(def->defnamespace))
+ kw_len += strlen(def->defnamespace) + 1;
+
+ text_compare = (char *) palloc(kw_len + 1);
+ if (is_extension_namespace(def->defnamespace))
+ sprintf(text_compare, "%s.%s", def->defnamespace, def->defname);
+ else
+ sprintf(text_compare, "%s", def->defname);
+
if (text_len > kw_len && text_str[kw_len] == '=' &&
- pg_strncasecmp(text_str, def->defname, kw_len) == 0)
+ pg_strncasecmp(text_str, text_compare, kw_len) == 0)
break;
}
if (!cell)
@@ -675,7 +688,7 @@ transformRelOptions(Datum oldOptions, List *defList, char *namspace,
}
}
- if (!valid)
+ if (!valid && !is_extension_namespace(def->defnamespace))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unrecognized parameter namespace \"%s\"",
@@ -688,7 +701,8 @@ transformRelOptions(Datum oldOptions, List *defList, char *namspace,
/* ignore if not in the same namespace */
if (namspace == NULL)
{
- if (def->defnamespace != NULL)
+ if (def->defnamespace != NULL &&
+ !is_extension_namespace(def->defnamespace))
continue;
}
else if (def->defnamespace == NULL)
@@ -706,10 +720,18 @@ transformRelOptions(Datum oldOptions, List *defList, char *namspace,
else
value = "true";
len = VARHDRSZ + strlen(def->defname) + 1 + strlen(value);
+
+ if (is_extension_namespace(def->defnamespace))
+ len += strlen(def->defnamespace) + 1;
+
/* +1 leaves room for sprintf's trailing null */
t = (text *) palloc(len + 1);
SET_VARSIZE(t, len);
- sprintf(VARDATA(t), "%s=%s", def->defname, value);
+
+ if (is_extension_namespace(def->defnamespace))
+ sprintf(VARDATA(t), "%s.%s=%s", def->defnamespace, def->defname, value);
+ else
+ sprintf(VARDATA(t), "%s=%s", def->defname, value);
astate = accumArrayResult(astate, PointerGetDatum(t),
false, TEXTOID,
@@ -896,6 +918,9 @@ parseRelOptions(Datum options, bool validate, relopt_kind kind,
int text_len = VARSIZE(optiontext) - VARHDRSZ;
int j;
+ if (is_extension_namespace(text_str))
+ continue;
+
/* Search for a match in reloptions */
for (j = 0; j < numoptions; j++)
{
@@ -1316,3 +1341,12 @@ tablespace_reloptions(Datum reloptions, bool validate)
return (bytea *) tsopts;
}
+
+bool
+is_extension_namespace(char *namespace)
+{
+ if (namespace == NULL)
+ return false;
+
+ return (pg_strncasecmp(namespace, "ext.", 4) == 0);
+}
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 11f6291..74f0015 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -2283,10 +2283,26 @@ reloption_elem:
$$ = makeDefElemExtended($1, $3, (Node *) $5,
DEFELEM_UNSPEC);
}
+ | ColLabel '.' ColLabel '.' ColLabel '=' def_arg
+ {
+ if (strcmp($1, "ext") != 0)
+ parser_yyerror("syntax error");
+
+ $$ = makeDefElemExtended(psprintf("%s.%s", $1, $3), $5,
+ (Node *) $7, DEFELEM_UNSPEC);
+ }
| ColLabel '.' ColLabel
{
$$ = makeDefElemExtended($1, $3, NULL, DEFELEM_UNSPEC);
}
+ | ColLabel '.' ColLabel '.' ColLabel
+ {
+ if (strcmp($1, "ext") != 0)
+ parser_yyerror("syntax error");
+
+ $$ = makeDefElemExtended(psprintf("%s.%s", $1, $3), $5,
+ NULL, DEFELEM_UNSPEC);
+ }
;
diff --git a/src/test/regress/expected/alter_table.out b/src/test/regress/expected/alter_table.out
index 7366392..7fe62b9 100644
--- a/src/test/regress/expected/alter_table.out
+++ b/src/test/regress/expected/alter_table.out
@@ -2337,3 +2337,127 @@ FROM (
0 | t
(1 row)
+--
+-- Extension Option Test
+--
+CREATE TABLE extension_reloption_test(id SERIAL PRIMARY KEY);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+------------
+ extension_reloption_test |
+ extension_reloption_test.id |
+ extension_reloption_test_pkey |
+(3 rows)
+
+ALTER TABLE extension_reloption_test SET (fillfactor=70);
+ALTER INDEX extension_reloption_test_pkey SET (fillfactor=80);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (n_distinct=100);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+------------------
+ extension_reloption_test | {fillfactor=70}
+ extension_reloption_test.id | {n_distinct=100}
+ extension_reloption_test_pkey | {fillfactor=80}
+(3 rows)
+
+ALTER TABLE extension_reloption_test SET (xx.bdr.do_replicate=true);
+ERROR: syntax error at or near "true"
+LINE 1: ...BLE extension_reloption_test SET (xx.bdr.do_replicate=true);
+ ^
+ALTER INDEX extension_reloption_test_pkey SET (xx.bdr.do_replicate=true);
+ERROR: syntax error at or near "true"
+LINE 1: ...xtension_reloption_test_pkey SET (xx.bdr.do_replicate=true);
+ ^
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (xx.bdr.do_replicate=true);
+ERROR: syntax error at or near "true"
+LINE 1: ...loption_test ALTER COLUMN id SET (xx.bdr.do_replicate=true);
+ ^
+ALTER TABLE extension_reloption_test SET (xx.bdr=true);
+ERROR: unrecognized parameter namespace "xx"
+ALTER INDEX extension_reloption_test_pkey SET (xx.bdr=true);
+ERROR: unrecognized parameter namespace "xx"
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (xx.bdr=true);
+ERROR: unrecognized parameter namespace "xx"
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+------------------
+ extension_reloption_test | {fillfactor=70}
+ extension_reloption_test.id | {n_distinct=100}
+ extension_reloption_test_pkey | {fillfactor=80}
+(3 rows)
+
+-- test ext.* namespace
+ALTER TABLE extension_reloption_test SET (ext.bdr.do_replicate=true);
+ALTER INDEX extension_reloption_test_pkey SET (ext.bdr.do_replicate=true);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (ext.bdr.do_replicate=true);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+--------------------------------------------
+ extension_reloption_test | {fillfactor=70,ext.bdr.do_replicate=true}
+ extension_reloption_test.id | {n_distinct=100,ext.bdr.do_replicate=true}
+ extension_reloption_test_pkey | {fillfactor=80,ext.bdr.do_replicate=true}
+(3 rows)
+
+ALTER TABLE extension_reloption_test SET (ext.foo.bar.bar=1234);
+ERROR: syntax error at or near "."
+LINE 1: ...ER TABLE extension_reloption_test SET (ext.foo.bar.bar=1234)...
+ ^
+ALTER INDEX extension_reloption_test_pkey SET (ext.foo.bar.bar=1234);
+ERROR: syntax error at or near "."
+LINE 1: ...DEX extension_reloption_test_pkey SET (ext.foo.bar.bar=1234)...
+ ^
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (ext.foo.bar.bar=1234);
+ERROR: syntax error at or near "."
+LINE 1: ...on_reloption_test ALTER COLUMN id SET (ext.foo.bar.bar=1234)...
+ ^
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+--------------------------------------------
+ extension_reloption_test | {fillfactor=70,ext.bdr.do_replicate=true}
+ extension_reloption_test.id | {n_distinct=100,ext.bdr.do_replicate=true}
+ extension_reloption_test_pkey | {fillfactor=80,ext.bdr.do_replicate=true}
+(3 rows)
+
+ALTER TABLE extension_reloption_test SET (ext.foo.bar=1234);
+ALTER INDEX extension_reloption_test_pkey SET (ext.foo.bar=1234);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (ext.foo.bar=1234);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+-------------------------------------------------------------
+ extension_reloption_test | {fillfactor=70,ext.bdr.do_replicate=true,ext.foo.bar=1234}
+ extension_reloption_test.id | {n_distinct=100,ext.bdr.do_replicate=true,ext.foo.bar=1234}
+ extension_reloption_test_pkey | {fillfactor=80,ext.bdr.do_replicate=true,ext.foo.bar=1234}
+(3 rows)
+
+ALTER TABLE extension_reloption_test RESET (ext.foo.bar);
+ALTER INDEX extension_reloption_test_pkey RESET (ext.foo.bar);
+ALTER TABLE extension_reloption_test ALTER COLUMN id RESET (ext.foo.bar);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ relname | reloptions
+-------------------------------+--------------------------------------------
+ extension_reloption_test | {fillfactor=70,ext.bdr.do_replicate=true}
+ extension_reloption_test.id | {n_distinct=100,ext.bdr.do_replicate=true}
+ extension_reloption_test_pkey | {fillfactor=80,ext.bdr.do_replicate=true}
+(3 rows)
+
diff --git a/src/test/regress/sql/alter_table.sql b/src/test/regress/sql/alter_table.sql
index 0d3b79b..b540e89 100644
--- a/src/test/regress/sql/alter_table.sql
+++ b/src/test/regress/sql/alter_table.sql
@@ -1567,3 +1567,59 @@ FROM (
FROM pg_class
WHERE relkind IN ('r', 'i', 'S', 't', 'm')
) mapped;
+
+--
+-- Extension Option Test
+--
+CREATE TABLE extension_reloption_test(id SERIAL PRIMARY KEY);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ALTER TABLE extension_reloption_test SET (fillfactor=70);
+ALTER INDEX extension_reloption_test_pkey SET (fillfactor=80);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (n_distinct=100);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ALTER TABLE extension_reloption_test SET (xx.bdr.do_replicate=true);
+ALTER INDEX extension_reloption_test_pkey SET (xx.bdr.do_replicate=true);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (xx.bdr.do_replicate=true);
+ALTER TABLE extension_reloption_test SET (xx.bdr=true);
+ALTER INDEX extension_reloption_test_pkey SET (xx.bdr=true);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (xx.bdr=true);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+-- test ext.* namespace
+ALTER TABLE extension_reloption_test SET (ext.bdr.do_replicate=true);
+ALTER INDEX extension_reloption_test_pkey SET (ext.bdr.do_replicate=true);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (ext.bdr.do_replicate=true);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ALTER TABLE extension_reloption_test SET (ext.foo.bar.bar=1234);
+ALTER INDEX extension_reloption_test_pkey SET (ext.foo.bar.bar=1234);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (ext.foo.bar.bar=1234);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ALTER TABLE extension_reloption_test SET (ext.foo.bar=1234);
+ALTER INDEX extension_reloption_test_pkey SET (ext.foo.bar=1234);
+ALTER TABLE extension_reloption_test ALTER COLUMN id SET (ext.foo.bar=1234);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+ALTER TABLE extension_reloption_test RESET (ext.foo.bar);
+ALTER INDEX extension_reloption_test_pkey RESET (ext.foo.bar);
+ALTER TABLE extension_reloption_test ALTER COLUMN id RESET (ext.foo.bar);
+SELECT relname, reloptions FROM pg_class WHERE oid IN ('extension_reloption_test'::regclass, 'extension_reloption_test_pkey'::regclass)
+UNION ALL
+SELECT attrelid::regclass||'.'||attname, attoptions FROM pg_attribute WHERE attrelid = 'extension_reloption_test'::regclass AND attname = 'id'
+ORDER BY 1;
+
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