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* Statement is only available from OdxSQL.
Use the CREATE ENVIRONMENT SQL_SYNTAX setting or the SET SQL_SYNTAX setting to activate.
os> odxsql
> CREATE ENVIRONMENT IN "myenv.xml";
> CREATE DATABASE mydb TYPE FLATFILE IN "myenv.xml";
> CREATE TABLE mytable PHYSICAL "test1"
(myseq integer,
mytext char(60) quicktext
)
IN "myenv.xml";
> CONNECT myenv.xml;
> UPDATE INDEXES;
> SELECT * FROM mytable where mytext = '<some criteria>';
> DISCONNECT;
> EXIT
os>
Omnidex SQL supports SQL's SELECT and Data Manipulation Statements (INSERT, UPDATE, and DELETE).
Omnidex supports statements to establish connections and set processing options for the connection as well as attach and detach individual files to an Omnidex Environment.
| CONNECT | Connect to an Omnidex Environment. |
| DISCONNECT | Disconnect from a connected Omnidex Environment. |
| SET | Set Omnidex SQL processing options. |
| ATTACH | Attach an Omnidex Standalone Table (OST) to a connected Omnidex Environment for queries and manipulation. |
| DETACH | Detach an Omnidex Standalone Table (OST) from a connected Omnidex Environment. |
Omnidex SQL has statements that create and drop objects within an Omnidex Environment.
Also see the OdxSQL Extract command to generate DDL statements from an existing Omnidex Environment.
| DDL Statement | Description |
|---|---|
| CREATE ENVIRONMENT | Create an Omnidex Environment into a named physical operating system file. |
| CREATE DATABASE | Create a Database within an Omnidex Environment. |
| CREATE TABLE | Create a Table within a Database in the Omnidex metadata or an Omnidex or RDBMS temporary table. |
| CREATE INDEX | Specify an Index in the Omnidex metadata but will not physically create the index. |
| CREATE INDEX GROUP | Specify an Index Group within the Omnidex metadata. |
| DROP ENVIRONMENT | Deletes the Omnidex Metadata Environment by physically deleting the operating system file. |
| DROP DATABASE | Remove the named Database from the Omnidex metadata. |
| DROP TABLE | Remove a table from the Omnidex metadata or deletes a previously created temporary table. |
| DROP INDEX | Removes an index from the Omnidex metadata. |
| DROP INDEX GROUP | Removes a named Index Group from the Omnidex metadata. |
| ATTACH | Attach an Omnidex Standalone Table (OST) to a connected Omnidex Environment for queries and manipulation. |
| DETACH | Detach an Omnidex Standalone Table (OST) from a connected Omnidex Environment. |
| ——————————————- |
| SELECT | Peform a Query Specification and SELECT rows. |
| EXPORT | Export rows or rowids to an external file. |
| OPEN CURSOR | Open a Cursor. |
| CLOSE CURSOR | Close a previously opened cursor. |
Omnidex supports several statements to synchronize the Omnidex indexes, rollup tables and internal statistics.
| UPDATE INDEXES | Update Omnidex Indexes. |
| UPDATE ROLLUP | Update Rollup Table with summarized information. |
| UPDATE ROLLUPS | Update all Rollup Tables for an Omnidex Database. |
| UPDATE STATISTICS | Update Statistics Information. |
| UPDATE TEXT | Update Textual Statistics. |
| PARTITION | Partition a table into smaller sub tables based on criteria. |
| LOAD OFX | Load Indexes for a table. |
| INSTALL INDEXES | Specifies the Omnidex indexes into the Omnidex XML Environment. No indexing is performed. |
| REMOVE INDEXES | Removes the Omnidex indexes from the Omnidex XML Environment. |
Omnidex supports lower level QUALIFY and JOIN statements to query the Omnidex indexes directly. These statements are advanced statements used for testing and to support legacy applications. The SELECT statement is now typically used instead.
(c)Copyright Dynamic Information Systems - This document was last updated March 30, 2011