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Add jdbc items.
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Bruce Momjian
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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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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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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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TIP 6: Have you searched our list archives?
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http://www.postgresql.org/search.mpl
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