Added sequence for pgsql

[Sylphy-Greyrat]

#1733

[Copilot]

Pull Request Overview

This PR adds support for sequence operations (CRUD, DDL export, and SQL generation) across the backend SPI, PostgreSQL plugin, domain services, and the frontend UI.

• Introduce new Sequence and SimpleSequence models and extend SqlBuilder, MetaData, and DBManage interfaces for sequences.
• Implement PostgreSQL-specific SQL builder and metadata retrieval for sequences.
• Wire up new sequence endpoints and UI components (tree context menu, editor, console integration, i18n, typings).

Reviewed Changes

Copilot reviewed 73 out of 73 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
SQLExecutor.java	Added generic preExecute helper for querying.
DefaultSqlBuilder.java & SqlBuilder.java	Added stub methods for buildCreateSequenceSql and buildModifySequenceSql.
DefaultMetaService.java & PostgreSQLMetaData.java	Extended sequence DDL and listing logic.
PostgreSQLSqlBuilder.java	Implemented SQL generation for sequences.
Frontend (service/sql.ts, deleteSequence.tsx, SequenceEditor, treeConfig, workspace store, etc.)	Hooked up new sequence UI flows and APIs.

Comments suppressed due to low confidence (2)

chat2db-server/chat2db-spi/src/main/java/ai/chat2db/spi/model/SimpleSequence.java:3

• [nitpick] The class uses SimpleSequence but the SPI interface method is called sequences. Consider consistent naming of methods (simpleSequences) or models to avoid confusion.

import lombok.AllArgsConstructor;

chat2db-client/src/service/sql.ts:62

• Overloading ITableParams with a capitalized Name prop for sequence operations conflicts with existing tableName usage and backend expectations (sequenceName). Define dedicated request interfaces for sequence endpoints (e.g., ISequenceParams).

}

[Copilot]

The import of CollectionUtil is unused in this class. Consider removing it to reduce clutter.

Suggested change

import cn.hutool.core.collection.CollectionUtil;

[Copilot]

Returning null from these stub methods will lead to NPEs when sequence SQL is generated. Either throw UnsupportedOperationException or provide a default implementation.

Suggested change

	return null;
	}
	@Override
	public String buildModifySequenceSql(Sequence oldSequence, Sequence newSequence) {
	return null;
	throw new UnsupportedOperationException("buildCreateSequenceSql is not implemented yet.");
	}
	@Override
	public String buildModifySequenceSql(Sequence oldSequence, Sequence newSequence) {
	throw new UnsupportedOperationException("buildModifySequenceSql is not implemented yet.");

[Copilot]

Payload includes both tableName and sequenceName but the service (bound to ITableParams) expects Name or sequenceName. Align the request payload with the service signature or use a dedicated sequence delete interface.

Suggested change

tableName: treeNodeData.name,