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/*
* _____________________________________________________________________________
*
* INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
* Trieste INAF - IA2 Italian Center for Astronomical Archives
* _____________________________________________________________________________
*
* Copyright (C) 2017 Istituto Nazionale di Astrofisica
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License Version 3 as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package it.inaf.ia2.tsm.datalayer.mysql;
import it.inaf.ia2.tsm.Column;
import it.inaf.ia2.tsm.Key;
import it.inaf.ia2.tsm.TapSchema;
import it.inaf.ia2.tsm.datalayer.ADQL;
import it.inaf.ia2.tsm.datalayer.DBBrokerTemplate;
import it.inaf.ia2.tsm.model.PropertyModel;
import it.inaf.ia2.tsm.model.TableModel;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class MySQLDBBroker extends DBBrokerTemplate {
private static final Logger LOG = LoggerFactory.getLogger(MySQLDBBroker.class);
public MySQLDBBroker(DataSource dataSource) {
super(dataSource, '`');
}
@Override
protected String getAllSchemaNamesQuery() {
return "SHOW DATABASES";
}
@Override
protected String getAllTablesNamesQuery(String schemaName) {
return "SHOW TABLES FROM " + escape(schemaName);
}
@Override
protected String getColumnNamesQuery(String schemaName, String tableName) {
return String.format("SHOW COLUMNS FROM %s.%s", escape(schemaName), escape(tableName));
}
@Override
public Map<String, Map<String, Object>> getAllColumnsMetadata(String schemaName, String tableName) throws SQLException {
Map<String, Map<String, Object>> allColumnsMetadata = new HashMap<>();
String query = String.format("SHOW COLUMNS FROM %s.%s", escape(schemaName), escape(tableName));
LOG.debug("Executing query {}", query);
try (Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(query)) {
while (resultSet.next()) {
Map<String, Object> cm = new HashMap<>();
// Column name
String columnName = resultSet.getString("Field");
cm.put(Column.COLUMN_NAME_KEY, columnName);
// Key info
String keyType = resultSet.getString("Key");
boolean primaryKey = "PRI".equals(keyType);
cm.put(Column.PRIMARY_KEY, primaryKey);
boolean indexed = "PRI".equals(keyType) || "UNI".equals(keyType) || "MUL".equals(keyType);
cm.put(Column.INDEXED_KEY, indexed);
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// Datatype and Size
String type = resultSet.getString("Type").toLowerCase();
String datatype;
Integer size = null;
if (type.startsWith("int")) {
datatype = ADQL.INTEGER;
} else if (type.startsWith("smallint")) {
datatype = ADQL.SMALLINT;
} else if (type.startsWith("bigint")) {
datatype = ADQL.BIGINT;
} else if (type.startsWith("float")) {
datatype = ADQL.REAL;
} else if (type.startsWith("char")) {
int beginIndex = type.indexOf('(');
int endIndex = type.indexOf(')');
size = Integer.parseInt(type.substring(beginIndex + 1, endIndex));
datatype = ADQL.CHAR;
} else if (type.startsWith("varchar")) {
int beginIndex = type.indexOf('(');
int endIndex = type.indexOf(')');
size = Integer.parseInt(type.substring(beginIndex + 1, endIndex));
datatype = ADQL.VARCHAR;
} else if (type.contains("timestamp")) {
datatype = ADQL.TIMESTAMP;
} else {
datatype = ADQL.getDataType(type);
}
cm.put(Column.DATATYPE_KEY, datatype);
cm.put(Column.SIZE_KEY, size);
Integer arraySize = null; // TODO (v 1.1)
allColumnsMetadata.put(columnName, cm);
}
}
return allColumnsMetadata;
}
@Override
protected void createTable(String tapSchemaName, TableModel tableModel, Connection conn) throws SQLException {
StringBuilder querySb = new StringBuilder();
querySb.append("CREATE TABLE IF NOT EXISTS ");
querySb.append(escape(tapSchemaName));
querySb.append(".");
querySb.append(escape(tableModel.getName()));
querySb.append(" (\n");
boolean first = true;
for (PropertyModel pm : tableModel.getProperties().values()) {
if (!first) {
querySb.append(",\n");
}
first = false;
querySb.append(pm.getName());
querySb.append(" ");
Class type = pm.getType();
if (type == String.class) {
querySb.append("VARCHAR(");
querySb.append(pm.getSize());
querySb.append(")");
} else if (type == Integer.class || type == Boolean.class) {
querySb.append("INTEGER");
} else if (type == Long.class) {
querySb.append("BIGINT");
} else {
throw new UnsupportedOperationException("Column type " + type.getCanonicalName() + " not supported yet!");
}
if (pm.isNullable()) {
querySb.append(" NULL");
} else {
querySb.append(" NOT NULL");
}
}
querySb.append(")");
String query = querySb.toString();
try (Statement stat = conn.createStatement()) {
LOG.debug("Executing query: {}", query);
stat.executeUpdate(query);
}
}
@Override
protected String getAddPrimaryKeyQuery(String tapSchemaName, String tableName, String[] keyColumns) {
return String.format("ALTER TABLE %s.%s ADD PRIMARY KEY(%s)", escape(tapSchemaName), escape(tableName), buildColumnsList(keyColumns));
}
@Override
protected String getAddForeignKeyQuery(String tapSchemaName, String tableName, String[] fromKeyColumns, String targetTableName, String[] toKeyColumns) {
return String.format("ALTER TABLE %s.%s ADD FOREIGN KEY (%s) REFERENCES %s.%s(%s)", escape(tapSchemaName), escape(tableName),
buildColumnsList(fromKeyColumns), escape(tapSchemaName), escape(targetTableName), buildColumnsList(toKeyColumns));
}
@Override
public List<Key> getKeys(TapSchema tapSchema, String schemaName) throws SQLException {
StringBuilder sb = new StringBuilder();
sb.append("SELECT\n");
sb.append("c.CONSTRAINT_NAME AS constraint_name,\n");
sb.append("k.TABLE_SCHEMA AS from_schema,\n");
sb.append("k.TABLE_NAME AS from_table,\n");
sb.append("k.COLUMN_NAME AS from_column,\n");
sb.append("k.REFERENCED_TABLE_SCHEMA AS target_schema,\n");
sb.append("k.REFERENCED_TABLE_NAME AS target_table,\n");
sb.append("k.REFERENCED_COLUMN_NAME AS target_column\n");
sb.append("FROM information_schema.TABLE_CONSTRAINTS c \n");
sb.append("LEFT JOIN information_schema.KEY_COLUMN_USAGE k \n");
sb.append("ON c.CONSTRAINT_NAME = k.CONSTRAINT_NAME AND c.TABLE_SCHEMA = k.TABLE_SCHEMA\n");
sb.append("WHERE c.CONSTRAINT_TYPE = 'FOREIGN KEY' \n");
sb.append("AND k.TABLE_SCHEMA = '");
sb.append(schemaName);
sb.append("' OR k.REFERENCED_TABLE_SCHEMA = '");
sb.append(schemaName);
sb.append("'");
String query = sb.toString();
LOG.debug("Executing query: {}", query);
List<Key> keys = new ArrayList<>();
try (Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(query)) {
while (resultSet.next()) {
//String constraintName = resultSet.getString("constraint_name");
String fromSchemaName = resultSet.getString("from_schema");
String fromTableName = resultSet.getString("from_table");
String targetSchemaName = resultSet.getString("target_schema");
String targetTableName = resultSet.getString("target_table");
Map<String, Object> keyMetadata = new HashMap<>();
keyMetadata.put(Key.FROM_TABLE_KEY, fromSchemaName + "." + fromTableName);
keyMetadata.put(Key.TARGET_TABLE_KEY, targetSchemaName + "." + targetTableName);
Key key = null;
// Searching for a partial built key
for (Key k : keys) {
if (k.getFromSchemaName().equals(fromSchemaName)
&& k.getFromTableSimpleName().equals(fromTableName)
&& k.getTargetSchemaName().equals(targetSchemaName)
&& k.getTargetTableSimpleName().equals(targetTableName)) {
key = k;
break;
}
}
if (key == null) {
key = new Key(tapSchema, keyMetadata);
keys.add(key);
}
key.addKeyColumn(resultSet.getString("from_column"), resultSet.getString("target_column"));
}
@Override
protected String getSchemaTablesQuery(String schemaName) {
return "SHOW TABLES FROM " + escape(schemaName);
}
@Override
protected String getCreateDatabaseQuery(String databaseName) {
return "CREATE DATABASE IF NOT EXISTS " + escape(databaseName);
}
@Override
protected String getTableTypesQuery(String schemaName) {
return "SELECT table_name, table_type FROM information_schema.tables WHERE table_schema = '" + schemaName + "'";
}
}