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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.pgsql;
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 it.inaf.ia2.tsm.model.TypesMapping;
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 java.util.regex.Pattern;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class PostgresDBBroker extends DBBrokerTemplate {
private final static Logger LOG = LoggerFactory.getLogger(PostgresDBBroker.class);
private final String pgDatabaseName;
public PostgresDBBroker(DataSource dataSource, String pgDatabaseName) {
super(dataSource, '"');
this.pgDatabaseName = pgDatabaseName;
}
@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(" ");
String pgsqlType = TypesMapping.getPostgresSQLTypeFromADQLType(pm.getType());
querySb.append(pgsqlType);
if (pm.getType().equals(ADQL.VARCHAR.name())
|| pm.getType().equals(ADQL.CHAR.name())) {
appendSize(querySb, pm.getSize());
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 ONLY %s.%s ADD CONSTRAINT %s_pkey PRIMARY KEY (%s)",
escape(tapSchemaName), escape(tableName), tableName, buildColumnsList(keyColumns));
}
@Override
protected String getAddForeignKeyQuery(String tapSchemaName, String tableName, String[] fromKeyColumns, String targetTableName, String[] toKeyColumns) {
// Building univocal constraint name
StringBuilder constraintNameSb = new StringBuilder(tableName);
for (String fromKeyColumn : fromKeyColumns) {
constraintNameSb.append("_");
constraintNameSb.append(fromKeyColumn);
}
return String.format("ALTER TABLE ONLY %s.%s ADD CONSTRAINT fk_%s FOREIGN KEY (%s) REFERENCES %s.%s(%s)",
escape(tapSchemaName), escape(tableName), constraintNameSb.toString(), buildColumnsList(fromKeyColumns),
escape(tapSchemaName), escape(targetTableName), buildColumnsList(toKeyColumns));
}
@Override
protected String getCreateDatabaseQuery(String databaseName) {
return "CREATE SCHEMA IF NOT EXISTS " + escape(databaseName);
}
@Override
protected String getSchemaTablesQuery(String schemaName) {
return String.format("SELECT tablename FROM pg_catalog.pg_tables where schemaname = '%s'", schemaName);
}
@Override
public Map<String, Map<String, Object>> getAllColumnsMetadata(String schemaName, String tableSimpleName) throws SQLException {
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Map<String, Map<String, Object>> allColumnsMetadata = new HashMap<>();
StringBuilder querySb = new StringBuilder();
querySb.append("SELECT c.column_name, c.data_type, r.contype AS column_type, c.character_maximum_length, c.numeric_precision\n"); //, c.numeric_precision_radix
querySb.append("FROM information_schema.columns c\n");
querySb.append("JOIN pg_catalog.pg_tables t ON c.table_schema = t.schemaname AND c.table_name = t.tablename\n");
querySb.append("LEFT JOIN pg_catalog.pg_constraint r ON c.ordinal_position = ANY(r.conkey) AND r.conrelid = (t.schemaname || '.' || t.tablename)::regclass::oid\n");
querySb.append("WHERE t.schemaname = '");
querySb.append(schemaName);
querySb.append("' AND t.tablename = '");
querySb.append(tableSimpleName);
querySb.append("'");
String query = querySb.toString();
LOG.debug("Executing query {}", query);
try (Connection conn = dataSource.getConnection();
Statement statement = conn.createStatement();
ResultSet resultSet = statement.executeQuery(query)) {
while (resultSet.next()) {
Map<String, Object> cm = new HashMap<>();
// Column name
String columnName = resultSet.getString("column_name");
cm.put(Column.COLUMN_NAME_KEY, columnName);
// Key info
String columnType = resultSet.getString("column_type");
boolean primaryKey = false;
boolean indexed = false;
if (columnType != null) {
primaryKey = "p".equals(columnType);
if ("p".equals(columnType)
|| "f".equals(columnType)
|| "u".equals(columnType)) {
indexed = true;
}
}
cm.put(Column.PRIMARY_KEY, primaryKey);
cm.put(Column.INDEXED_KEY, indexed);
int size = 0;
String datatype;
String type = resultSet.getString("data_type");
datatype = TypesMapping.getADQLTypeFromPostgresType(type);
if (datatype.equals(ADQL.VARCHAR.name()) || datatype.equals(ADQL.CHAR.name())) {
size = resultSet.getInt("character_maximum_length");
}
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
public List<Key> getKeys(TapSchema tapSchema, String schemaName) throws SQLException {
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StringBuilder queryKeysSb = new StringBuilder();
queryKeysSb.append("SELECT\n");
queryKeysSb.append("conname AS constraint_name,\n");
queryKeysSb.append("conrelid::regclass AS from_table, \n");
queryKeysSb.append("confrelid::regclass AS target_table\n");
queryKeysSb.append("FROM pg_catalog.pg_constraint\n");
queryKeysSb.append("WHERE contype = 'f'\n");
queryKeysSb.append("AND ((conrelid::regclass || '' LIKE '");
queryKeysSb.append(schemaName);
queryKeysSb.append(".%')\n");
queryKeysSb.append("OR (confrelid::regclass || '' LIKE '");
queryKeysSb.append(schemaName);
queryKeysSb.append(".%'))");
String queryKeys = queryKeysSb.toString();
try (Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(queryKeys)) {
LOG.debug("Executing query {}", queryKeys);
List<Key> keys = new ArrayList<>();
while (resultSet.next()) {
String constraintName = resultSet.getString("constraint_name");
String fromTableCompleteName = resultSet.getString("from_table");
String targetTableCompleteName = resultSet.getString("target_table");
String fromSchema = fromTableCompleteName.split(Pattern.quote("."))[0];
String targetSchema = targetTableCompleteName.split(Pattern.quote("."))[0];
Map<String, Object> keyMetadata = new HashMap<>();
keyMetadata.put(Key.FROM_TABLE_KEY, fromTableCompleteName);
keyMetadata.put(Key.TARGET_TABLE_KEY, targetTableCompleteName);
Key key = new Key(tapSchema, keyMetadata);
keys.add(key);
StringBuilder queryFromKCSb = new StringBuilder();
queryFromKCSb.append("SELECT\n");
queryFromKCSb.append("c.column_name AS key_column\n");
queryFromKCSb.append("FROM information_schema.columns c\n");
queryFromKCSb.append("JOIN pg_catalog.pg_constraint r ON c.ordinal_position = ANY(r.conkey)\n");
queryFromKCSb.append("AND (c.table_schema || '.' || c.table_name) = (r.conrelid::regclass || '')\n");
queryFromKCSb.append("WHERE r.conname = '");
queryFromKCSb.append(constraintName);
queryFromKCSb.append("' AND r.contype = 'f'\n");
queryFromKCSb.append("AND c.table_schema = '");
queryFromKCSb.append(fromSchema);
queryFromKCSb.append("'\nAND table_catalog = '");
queryFromKCSb.append(pgDatabaseName);
queryFromKCSb.append("'");
// conkey conrelid
String queryFromKC = queryFromKCSb.toString();
StringBuilder queryTargetKCSb = new StringBuilder();
queryTargetKCSb.append("SELECT\n");
queryTargetKCSb.append("c.column_name AS key_column\n");
queryTargetKCSb.append("FROM information_schema.columns c\n");
queryTargetKCSb.append("JOIN pg_catalog.pg_constraint r ON c.ordinal_position = ANY(r.confkey)\n");
queryTargetKCSb.append("AND (c.table_schema || '.' || c.table_name) = (r.confrelid::regclass || '')\n");
queryTargetKCSb.append("WHERE r.conname = '");
queryTargetKCSb.append(constraintName);
queryTargetKCSb.append("' AND r.contype = 'f'\n");
queryTargetKCSb.append("AND c.table_schema = '");
queryTargetKCSb.append(targetSchema);
queryTargetKCSb.append("'\nAND table_catalog = '");
queryTargetKCSb.append(pgDatabaseName);
queryTargetKCSb.append("'");
// as above, but with confkey and confrelid and different c.table_schema where condition
String queryTargetKC = queryTargetKCSb.toString();
try (Statement statFromKC = connection.createStatement();
Statement statTargetKC = connection.createStatement()) {
try (ResultSet rsFromKC = statFromKC.executeQuery(queryFromKC);
ResultSet rsTargetKC = statTargetKC.executeQuery(queryTargetKC)) {
LOG.debug("Executing query {}", queryFromKC);
LOG.debug("Executing query {}", queryTargetKC);
while (rsFromKC.next()) {
if (rsTargetKC.next()) {
key.addKeyColumn(
rsFromKC.getString("key_column"),
rsTargetKC.getString("key_column")
);
}
}
}
}
}
return keys;
}
}
@Override
protected String getTableTypesQuery(String schemaName) {
StringBuilder sb = new StringBuilder();
sb.append("SELECT tablename AS table_name, 'table' AS table_type\n");
sb.append("FROM pg_catalog.pg_tables WHERE schemaname = '");
sb.append(schemaName);
sb.append("'\n");
sb.append("UNION\n");
sb.append("SELECT table_name AS table_name, 'view' AS table_type\n");
sb.append("FROM INFORMATION_SCHEMA.views\n");
sb.append("WHERE table_schema = '");
sb.append(schemaName);
sb.append("'");
return sb.toString();
}
@Override
protected String getColumnNamesQuery(String tapSchemaName, String tableName) {
return String.format("SELECT column_name FROM information_schema.columns WHERE table_schema = '%s' AND table_name = '%s'",
tapSchemaName, tableName);
}
@Override
protected String getAllSchemaNamesQuery() {
return "SELECT schema_name FROM information_schema.schemata";
}
@Override
protected String getAllTablesNamesQuery(String schemaName) {
return String.format("SELECT tablename FROM pg_catalog.pg_tables where schemaname = '%s'", schemaName);
}