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| CREATE OR REPLACE FUNCTION READ_JDBC(OPTION OBJECT, query STRING) | |
| RETURNS TABLE(data OBJECT) | |
| LANGUAGE JAVA | |
| RUNTIME_VERSION = '17' | |
| IMPORTS = ('@NEO4J_JARS/drivers/neo4j-jdbc-full-bundle-6.2.0.jar') | |
| // EXTERNAL_ACCESS_INTEGRATIONS = (external_database_network_rule_ext_int) | |
| SECRETS = ('cred' = external_database_cred ) | |
| HANDLER = 'JdbcDataReader' | |
| AS $$ | |
| import java.sql.DriverManager; | |
| import java.sql.SQLException; | |
| import java.util.ArrayList; | |
| import java.util.HashMap; | |
| import java.util.Map; | |
| import java.util.stream.Stream; | |
| public class JdbcDataReader { | |
| record OutputRow(Map<String, String> data) { | |
| public Map<String, String> getData() { | |
| return data; | |
| } | |
| } | |
| public static Class<?> getOutputClass() { | |
| return OutputRow.class; | |
| } | |
| public Stream<OutputRow> process(Map<String, String> jdbcConfig, String query) { | |
| String jdbcUrl = jdbcConfig.get("url"); | |
| String username; | |
| String password; | |
| if ("true".equals(jdbcConfig.get("use_secrets"))) { | |
| SnowflakeSecrets sfSecrets = SnowflakeSecrets.newInstance(); | |
| var secret = sfSecrets.getUsernamePassword("cred"); | |
| username = secret.getUsername(); | |
| password = secret.getPassword(); | |
| } else { | |
| username = jdbcConfig.get("username"); | |
| password = jdbcConfig.get("password"); | |
| } | |
| try (var connection = DriverManager.getConnection(jdbcUrl, username, password); | |
| var statement = connection.createStatement(); | |
| var resultSet = statement.executeQuery(query); | |
| ) { | |
| var metaData = resultSet.getMetaData(); | |
| var columnNames = new ArrayList<String>(); | |
| var columnCount = metaData.getColumnCount(); | |
| for (int i = 1; i <= columnCount; i++) { | |
| columnNames.add(metaData.getColumnName(i)); | |
| } | |
| var streamBuilder = Stream.<OutputRow>builder(); | |
| while (resultSet.next()) { | |
| Map<String, String> rowMap = new HashMap<>(); | |
| for (String columnName : columnNames) { | |
| String columnValue = resultSet.getString(columnName); | |
| rowMap.put(columnName, columnValue); | |
| } | |
| streamBuilder.add(new OutputRow(rowMap)); | |
| } | |
| return streamBuilder.build(); | |
| } catch (SQLException ex) { | |
| ex.printStackTrace(); | |
| return Stream.of(new OutputRow(Map.of("ERROR", ex.toString()))); | |
| } | |
| } | |
| } | |
| $$; |
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