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@ -510,3 +510,115 @@ thanks, |
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TIP 4: Don't 'kill -9' the postmaster |
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From pgsql-jdbc-owner+M968@postgresql.org Sun Jul 8 18:59:29 2001 |
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for <pgsql-jdbc@postgresql.org>; Sun, 8 Jul 2001 18:53:16 -0400 (EDT) |
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with esmtp id 15JNQH-0xfc00C; Mon, 9 Jul 2001 00:53:05 +0200 |
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Date: Mon, 9 Jul 2001 00:55:37 +0200 (CEST) |
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From: Peter Eisentraut <peter_e@gmx.net> |
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To: <pgsql-jdbc@postgresql.org> |
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Subject: [JDBC] To do list for DatabaseMetaData |
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Message-ID: <Pine.LNX.4.30.0107090041240.677-100000@peter.localdomain> |
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MIME-Version: 1.0 |
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Precedence: bulk |
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Sender: pgsql-jdbc-owner@postgresql.org |
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Status: OR |
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Since DatabaseMetaData seems to have been a subject of interest lately I |
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have composed a list of concrete things that need to be done there. |
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The spec of DatabaseMetaData is here: |
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http://java.sun.com/j2se/1.3/docs/api/java/sql/DatabaseMetaData.html |
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All the functions listed in the spec and not listed below I have recently |
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checked and updated for correctness and compliance. Thus, this list is |
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complete. Functions marked with '?' I have not checked yet. |
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If someone wants to tackle some of the getThings() functions, a |
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description of the system catalogs is in the Developer's Guide. Also note |
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that some functions currently incorrectly handle the case of null patterns |
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vs. "" patterns vs. "%" patterns. |
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At least two parameters obtained by a DatabaseMetaData method are |
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user-tunable on the server side. The only way to get at those numbers |
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currently is to use SHOW and parse the NOTICE: it sends back (which is |
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impossible in the days of internationalized messages), so a nice |
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side-project would be to implement a get_config_variable(text) returns |
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text (better names possible) function to allow easier access. |
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Now the list: |
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allProceduresAreCallable() not all procedures listed are |
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callable (triggers, in/out) |
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allTablesAreSelectable() should this check access |
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privileges or what? |
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getSQLKeywords() outdated, could be automated like |
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keywords.sgml |
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getNumericFunctions() decide what exactly is a "numeric function"? |
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getStringFunctions() ditto |
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getSystemFunctions() ditto |
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getTimeDateFunctions() ditto |
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getExtraNameCharacters() server allows \200 to \377, how |
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does this fit in with Unicode? |
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getMaxColumnNameLength() 32 is hard-coded here, maybe query server |
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getMaxColumnsInIndex() this should be detected from server |
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getMaxColumnsInTable() this limit is probably shaky |
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getMaxConnections() could query the server for this |
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(SHOW, see above) |
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getMaxCursorNameLength() 32 hard-coded |
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getMaxSchemaNameLength() will be 32 when done |
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getMaxProcedureNameLength() 32 hard-coded |
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getMaxCatalogNameLength() should be NAMEDATALEN |
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doesMaxRowSizeIncludeBlobs() since we don't have blobs, should |
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this throw an exception? |
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getMaxStatements() questionable, see comment there |
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getMaxTableNameLength() 32 hard-coded |
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getMaxUserNameLength() 32 hard-coded |
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getDefaultTransactionIsolation() This is configurable in 7.2. |
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(SHOW, see above) |
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getProcedures() missing catalog (database) and |
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remarks columns |
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getProcedureColumns() only dummy implementation |
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getTables() fails to handle pre-7.1 servers |
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(relkind 'v') |
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getSchemas() This should throw an exception. |
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getTableTypes() ? |
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getColumns() ? |
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getColumnPrivileges() not implemented |
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getTablePrivileges() not implemented |
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getBestRowIdentifier() only dummy implementation |
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getVersionColumns() not implemented |
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getPrimaryKeys() ? |
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getImportedKeys() ? |
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getExportedKeys() not implemented |
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getCrossReference() not implemented |
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getTypeInfo() ? |
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getIndexInfo() ? |
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getUDTs() ? |
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-- |
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Peter Eisentraut peter_e@gmx.net http://funkturm.homeip.net/~peter |
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---------------------------(end of broadcast)--------------------------- |
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TIP 6: Have you searched our list archives? |
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http://www.postgresql.org/search.mpl |
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Bruce Momjian
25 years ago