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From: Clément Prévost <[email protected]>
To: Tom Lane <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Cc: [email protected]
Subject: Re: Documentation on information_ schema columns that does not exist
Date: Mon, 1 Jun 2015 01:25:13 +0200
Message-ID: <CABaKae8UVSGwyQ-QFKxsk9obqyBpYOsCfgO_jNP_Y8iTJOuJxw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CABaKae8+p6=zhCM=Qrq_GMN88pFqjb5EgHpy9bjGaKZfvJmzZA@mail.gmail.com>
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Well spotted!

I attached 2 patches: 1 to fix erroneous documentation and the other to fix
information schema types.

regards, clément prévost

On 1 June 2015 at 00:14, Tom Lane <[email protected]> wrote:

> I wrote:
> > Another problem in the same area is that the column types of
> > foreign_table_schema and foreign_table_name seem to be "name":
>
> Further pursuant to that, these are the information_schema columns
> that don't seem to have been cast to the spec-required type:
>
>  column_options            | column_name          | name
>  column_options            | table_name           | name
>  column_options            | table_schema         | name
>  foreign_table_options     | foreign_table_name   | name
>  foreign_table_options     | foreign_table_schema | name
>  foreign_tables            | foreign_table_name   | name
>  foreign_tables            | foreign_table_schema | name
>
>                         regards, tom lane
>


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Attachments:

  [application/octet-stream] conform-information-schema-foreign-table-column-type-to-spec.patch (1.3K, 3-conform-information-schema-foreign-table-column-type-to-spec.patch)
  download | inline diff:
diff --git a/src/backend/catalog/information_schema.sql b/src/backend/catalog/information_schema.sql
index 6e1b241..5efed4f 100644
--- a/src/backend/catalog/information_schema.sql
+++ b/src/backend/catalog/information_schema.sql
@@ -2713,9 +2713,9 @@ GRANT SELECT ON element_types TO PUBLIC;
 
 /* Base view for foreign table columns */
 CREATE VIEW _pg_foreign_table_columns AS
-    SELECT n.nspname,
-           c.relname,
-           a.attname,
+    SELECT CAST(n.nspname AS sql_identifier) AS nspname,
+           CAST(c.relname AS sql_identifier) AS relname,
+           CAST(a.attname AS sql_identifier) AS attname,
            a.attfdwoptions
     FROM pg_foreign_table t, pg_authid u, pg_namespace n, pg_class c,
          pg_attribute a
@@ -2841,8 +2841,8 @@ GRANT SELECT ON foreign_servers TO PUBLIC;
 CREATE VIEW _pg_foreign_tables AS
     SELECT
            CAST(current_database() AS sql_identifier) AS foreign_table_catalog,
-           n.nspname AS foreign_table_schema,
-           c.relname AS foreign_table_name,
+           CAST(n.nspname AS sql_identifier) AS foreign_table_schema,
+           CAST(c.relname AS sql_identifier) AS foreign_table_name,
            t.ftoptions AS ftoptions,
            CAST(current_database() AS sql_identifier) AS foreign_server_catalog,
            CAST(srvname AS sql_identifier) AS foreign_server_name,


  [application/octet-stream] remove-invalid-information-schema-doc.patch (866B, 4-remove-invalid-information-schema-doc.patch)
  download | inline diff:
diff --git a/doc/src/sgml/information_schema.sgml b/doc/src/sgml/information_schema.sgml
index ca1f20b..c6e6c9d 100644
--- a/doc/src/sgml/information_schema.sgml
+++ b/doc/src/sgml/information_schema.sgml
@@ -2898,18 +2898,6 @@ ORDER BY c.ordinal_position;
      </row>
 
      <row>
-      <entry><literal>foreign_server_catalog</literal></entry>
-      <entry><type>sql_identifier</type></entry>
-      <entry>Name of the database that the foreign server is defined in (always the current database)</entry>
-     </row>
-
-     <row>
-      <entry><literal>foreign_server_name</literal></entry>
-      <entry><type>sql_identifier</type></entry>
-      <entry>Name of the foreign server</entry>
-     </row>
-
-     <row>
       <entry><literal>option_name</literal></entry>
       <entry><type>sql_identifier</type></entry>
       <entry>Name of an option</entry>


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  Subject: Re: Documentation on information_ schema columns that does not exist
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