Read all Information Schema from a relational database
sastafford opened this issue · comments
As a developer
I want to Read the table metadata from a relational database table
So that I can process this data for batch processing.
Notes
Project: rdbms
Package: com.marklogic.spring.batch.item.rdbms
Class: InformationSchemaItemReader implements ItemStreamReader
Recommend to test with H2 Database. RDBMSs which support information_schema include:
- Microsoft SQL Server
- MySQL
- PostgreSQL
- InterSystems Caché
- H2 Database
- HSQLDB
- MariaDB
Recommend that this class inherits from a JdbcCursorItemReader. Preset the sql attribute to read all table names and columns for each table.
Unit Tests
Given an relational database with an Information Schema
When the InformationSchemaItemReader reads from the database
Then a ResultSet is returned with the table metadata.
Example
Column, Table, Type
name, Customer, string
address, Customer, string
invoiceId, Invoice, integer
customerId, Invoice, integer
total, Invoice, float