ai.grakn.migration.sql

Class SQLMigrator

java.lang.Object

ai.grakn.migration.base.AbstractMigrator

ai.grakn.migration.sql.SQLMigrator

All Implemented Interfaces:

Migrator, AutoCloseable

public class SQLMigrator
extends AbstractMigrator

The SQL migrator will execute the given SQL query and then apply the given template to those results.

Field Summary

Fields inherited from class ai.grakn.migration.base.AbstractMigrator

BATCH_SIZE, queryBuilder

Constructor Summary

Constructors

Constructor and Description
SQLMigrator(String query, String template, Connection connection) Construct a SQL migrator to migrate data from the given DB

Method Summary

Modifier and Type	Method and Description
void	close() SQL Migrator has nothing to close
Map<String,Object>	convertToValidValues(Map<String,Object> data) Convert values to be valid - removing nulls and changing to supported types
java.util.stream.Stream<InsertQuery>	migrate() Migrate the results of the SQL statement with the provided template

Methods inherited from class ai.grakn.migration.base.AbstractMigrator

registerMacro, stream, template, validValue

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLMigrator

public SQLMigrator(String query,
                   String template,
                   Connection connection)

Construct a SQL migrator to migrate data from the given DB

Parameters:

query - SQL query to gather data from database

template - parametrized graql insert query

connection - JDBC connection to the SQL database

Method Detail

migrate

public java.util.stream.Stream<InsertQuery> migrate()

Migrate the results of the SQL statement with the provided template

Returns:

stream of parsed insert queries

close

public void close()

SQL Migrator has nothing to close

convertToValidValues

public Map<String,Object> convertToValidValues(Map<String,Object> data)

Convert values to be valid - removing nulls and changing to supported types

Parameters:

data - data to make valid

Returns:

valid data