Add Schema Support for PostgreSQL Tables

[M4teus2020]

Changes

• Added support for handling table schemas in PostgreSQL operations
• Modified table name handling to include schema information
• Updated SQL queries to properly reference schema-qualified tables
• Added helper functions to parse and format table names with schemas

Technical Details

• Added getTableSchema and getTableName utility functions to handle schema.table format
• Updated table creation SQL to include schema name in the generated CREATE TABLE statement
• Modified table listing to include schema information
• Updated column and foreign key queries to respect table schemas
• Fixed test cases to account for schema-qualified table names

Impact

This change improves PostgreSQL support by properly handling tables in different schemas, not just the default 'public' schema. All database operations now correctly reference tables with their schema names.

Testing

• Updated existing test cases to verify schema handling
• Verified table creation with schema-qualified names