Merge pull request #12262 from keerthigadde/JAVA-9556
JAVA-9556 added try-with-resources for resultset
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commit
d0b326355c
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@ -14,33 +14,35 @@ public class MetadataExtractor {
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}
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public void extractTableInfo() throws SQLException {
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ResultSet resultSet = databaseMetaData.getTables(null, null, "CUST%", new String[] { "TABLE" });
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try (ResultSet resultSet = databaseMetaData.getTables(null, null, "CUST%", new String[] { "TABLE" })) {
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while (resultSet.next()) {
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// Print the names of existing tables
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System.out.println(resultSet.getString("TABLE_NAME"));
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System.out.println(resultSet.getString("REMARKS"));
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}
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}
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}
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public void extractSystemTables() throws SQLException {
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ResultSet resultSet = databaseMetaData.getTables(null, null, null, new String[] { "SYSTEM TABLE" });
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try (ResultSet resultSet = databaseMetaData.getTables(null, null, null, new String[] { "SYSTEM TABLE" })) {
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while (resultSet.next()) {
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// Print the names of system tables
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System.out.println(resultSet.getString("TABLE_NAME"));
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}
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}
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}
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public void extractViews() throws SQLException {
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ResultSet resultSet = databaseMetaData.getTables(null, null, null, new String[] { "VIEW" });
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try(ResultSet resultSet = databaseMetaData.getTables(null, null, null, new String[] { "VIEW" })) {
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while (resultSet.next()) {
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// Print the names of existing views
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System.out.println(resultSet.getString("TABLE_NAME"));
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}
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}
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}
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public void extractColumnInfo(String tableName) throws SQLException {
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ResultSet columns = databaseMetaData.getColumns(null, null, tableName, null);
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try(ResultSet columns = databaseMetaData.getColumns(null, null, tableName, null)) {
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while (columns.next()) {
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String columnName = columns.getString("COLUMN_NAME");
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String columnSize = columns.getString("COLUMN_SIZE");
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@ -50,22 +52,20 @@ public class MetadataExtractor {
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System.out.println(String.format("ColumnName: %s, columnSize: %s, datatype: %s, isColumnNullable: %s, isAutoIncrementEnabled: %s", columnName, columnSize, datatype, isNullable, isAutoIncrement));
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}
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}
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}
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public void extractPrimaryKeys(String tableName) throws SQLException {
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ResultSet primaryKeys = databaseMetaData.getPrimaryKeys(null, null, tableName);
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try(ResultSet primaryKeys = databaseMetaData.getPrimaryKeys(null, null, tableName)) {
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while (primaryKeys.next()) {
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String primaryKeyColumnName = primaryKeys.getString("COLUMN_NAME");
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String primaryKeyName = primaryKeys.getString("PK_NAME");
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System.out.println(String.format("columnName:%s, pkName:%s", primaryKeyColumnName, primaryKeyName));
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}
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}
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public void fun() throws SQLException {
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}
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public void extractForeignKeys(String tableName) throws SQLException {
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ResultSet foreignKeys = databaseMetaData.getImportedKeys(null, null, tableName);
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try(ResultSet foreignKeys = databaseMetaData.getImportedKeys(null, null, tableName)) {
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while (foreignKeys.next()) {
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String pkTableName = foreignKeys.getString("PKTABLE_NAME");
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String fkTableName = foreignKeys.getString("FKTABLE_NAME");
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@ -74,6 +74,7 @@ public class MetadataExtractor {
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System.out.println(String.format("pkTableName:%s, fkTableName:%s, pkColumnName:%s, fkColumnName:%s", pkTableName, fkTableName, pkColumnName, fkColumnName));
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}
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}
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}
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public void extractDatabaseInfo() throws SQLException {
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String productName = databaseMetaData.getDatabaseProductName();
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@ -89,13 +90,14 @@ public class MetadataExtractor {
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public void extractUserName() throws SQLException {
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String userName = databaseMetaData.getUserName();
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System.out.println(userName);
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ResultSet schemas = databaseMetaData.getSchemas();
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try(ResultSet schemas = databaseMetaData.getSchemas()) {
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while (schemas.next()) {
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String table_schem = schemas.getString("TABLE_SCHEM");
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String table_catalog = schemas.getString("TABLE_CATALOG");
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System.out.println(String.format("Table_schema:%s, Table_catalog:%s", table_schem, table_catalog));
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}
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}
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}
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public void extractSupportedFeatures() throws SQLException {
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System.out.println("Supports scrollable & Updatable Result Set: " + databaseMetaData.supportsResultSetConcurrency(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE));
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