gudusoft.gsqlparser.resolver2.metadata

Class BatchMetadataCollector

Object

gudusoft.gsqlparser.resolver2.metadata.BatchMetadataCollector

public class BatchMetadataCollector
extends Object

Delta 1: Batch-local DDL metadata collector. Collects table and column metadata from DDL statements (CREATE TABLE, CREATE VIEW) within the same SQL batch and creates a TSQLEnv for use by TSQLResolver2. This enables standalone resolution of SQL batches that contain both DDL and DML, without requiring external metadata from TSQLEnv. Example:

 CREATE TABLE t(id int, name varchar(10));
 SELECT t.id, t.name FROM t;
 

The collector will extract table "t" with columns "id" and "name" from the CREATE TABLE statement, making them available for resolution in the SELECT.

Constructor Summary

Constructors

Constructor and Description
BatchMetadataCollector(TStatementList statements, EDbVendor vendor) Create a batch metadata collector.

Method Summary

Modifier and Type	Method and Description
TSQLEnv	collect() Collect metadata from DDL statements and create a TSQLEnv.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BatchMetadataCollector

public BatchMetadataCollector(TStatementList statements,
                              EDbVendor vendor)

Create a batch metadata collector.

Parameters:

statements - The list of SQL statements to process

vendor - The database vendor

Method Detail

collect

public TSQLEnv collect()

Collect metadata from DDL statements and create a TSQLEnv.

Returns:

A TSQLEnv containing table/column metadata from DDL statements, or null if no DDL statements were found