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JDBC wrapper for the DataStax CQL Java Driver.
/*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.adejanovski.cassandra.jdbc;
import com.datastax.driver.core.Metadata;
import java.sql.*;
import static com.github.adejanovski.cassandra.jdbc.Utils.NOT_SUPPORTED;
import static com.github.adejanovski.cassandra.jdbc.Utils.NO_INTERFACE;
class CassandraDatabaseMetaData implements DatabaseMetaData
{
private CassandraConnection connection;
private CassandraStatement statement;
private Metadata metadata;
public CassandraDatabaseMetaData(CassandraConnection connection) throws SQLException
{
this.connection = connection;
this.statement = new CassandraStatement(this.connection);
this.metadata = this.connection.getClusterMetadata();
}
public boolean isWrapperFor(Class iface) throws SQLException
{
return iface.isAssignableFrom(getClass());
}
public T unwrap(Class iface) throws SQLException
{
if (iface.isAssignableFrom(getClass())) return iface.cast(this);
throw new SQLFeatureNotSupportedException(String.format(NO_INTERFACE, iface.getSimpleName()));
}
public boolean allProceduresAreCallable() throws SQLException
{
return false;
}
public boolean allTablesAreSelectable() throws SQLException
{
return true;
}
public boolean autoCommitFailureClosesAllResultSets() throws SQLException
{
return false;
}
public boolean dataDefinitionCausesTransactionCommit() throws SQLException
{
return false;
}
public boolean dataDefinitionIgnoredInTransactions() throws SQLException
{
return false;
}
public boolean deletesAreDetected(int arg0) throws SQLException
{
return false;
}
public boolean doesMaxRowSizeIncludeBlobs() throws SQLException
{
return false;
}
public ResultSet getAttributes(String arg0, String arg1, String arg2, String arg3) throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getBestRowIdentifier(String arg0, String arg1, String arg2, int arg3, boolean arg4) throws SQLException
{
return new CassandraResultSet();
}
public String getCatalogSeparator() throws SQLException
{
return "";
}
public String getCatalogTerm() throws SQLException
{
return "Cluster";
}
public ResultSet getCatalogs() throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
ResultSet rs = MetadataResultSets.instance.makeCatalogs(statement);
return rs;
}
public ResultSet getClientInfoProperties() throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getColumnPrivileges(String arg0, String arg1, String arg2, String arg3) throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getColumns(String catalog,String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
if (catalog == null || connection.getCatalog().equals(catalog))
{
statement.connection = connection;
if (schemaPattern == null) schemaPattern = connection.getSchema(); //limit to current schema if set
ResultSet rs = MetadataResultSets.instance.makeColumns(statement, schemaPattern, tableNamePattern,columnNamePattern);
return rs;
}
return new CassandraResultSet();
}
public Connection getConnection() throws SQLException
{
return connection;
}
public ResultSet getCrossReference(String arg0, String arg1, String arg2, String arg3, String arg4, String arg5) throws SQLException
{
return new CassandraResultSet();
}
public int getDatabaseMajorVersion() throws SQLException
{
return CassandraConnection.DB_MAJOR_VERSION;
}
public int getDatabaseMinorVersion() throws SQLException
{
return CassandraConnection.DB_MINOR_VERSION;
}
public String getDatabaseProductName() throws SQLException
{
return CassandraConnection.DB_PRODUCT_NAME;
}
public String getDatabaseProductVersion() throws SQLException
{
return String.format("%d.%d.%d", CassandraConnection.DB_MAJOR_VERSION,CassandraConnection.DB_MINOR_VERSION,CassandraConnection.DB_REVISION);
}
public int getDefaultTransactionIsolation() throws SQLException
{
return Connection.TRANSACTION_NONE;
}
public int getDriverMajorVersion()
{
return CassandraDriver.DVR_MAJOR_VERSION;
}
public int getDriverMinorVersion()
{
return CassandraDriver.DVR_MINOR_VERSION;
}
public String getDriverName() throws SQLException
{
return CassandraDriver.DVR_NAME;
}
public String getDriverVersion() throws SQLException
{
return String.format("%d.%d.%d", CassandraDriver.DVR_MAJOR_VERSION,CassandraDriver.DVR_MINOR_VERSION,CassandraDriver.DVR_PATCH_VERSION);
}
public ResultSet getExportedKeys(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public String getExtraNameCharacters() throws SQLException
{
return "";
}
public ResultSet getFunctionColumns(String arg0, String arg1, String arg2, String arg3) throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getFunctions(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public String getIdentifierQuoteString() throws SQLException
{
return " ";
}
public ResultSet getImportedKeys(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getIndexInfo(String catalog, String schema, String table, boolean unique, boolean approximate) throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
if (catalog == null || connection.getCatalog().equals(catalog))
{
if (schema == null) schema = connection.getSchema(); //limit to current schema if set
ResultSet rs = MetadataResultSets.instance.makeIndexes(statement, schema, table,unique,approximate);
return rs;
}
return new CassandraResultSet();
}
public int getJDBCMajorVersion() throws SQLException
{
return 4;
}
public int getJDBCMinorVersion() throws SQLException
{
return 0;
}
public int getMaxBinaryLiteralLength() throws SQLException
{
// Cassandra can represent a 2GB value, but CQL has to encode it in hex
return Integer.MAX_VALUE / 2;
}
public int getMaxCatalogNameLength() throws SQLException
{
return Short.MAX_VALUE;
}
public int getMaxCharLiteralLength() throws SQLException
{
return Integer.MAX_VALUE;
}
public int getMaxColumnNameLength() throws SQLException
{
return Short.MAX_VALUE;
}
public int getMaxColumnsInGroupBy() throws SQLException
{
return 0;
}
public int getMaxColumnsInIndex() throws SQLException
{
return 0;
}
public int getMaxColumnsInOrderBy() throws SQLException
{
return 0;
}
public int getMaxColumnsInSelect() throws SQLException
{
return 0;
}
public int getMaxColumnsInTable() throws SQLException
{
return 0;
}
public int getMaxConnections() throws SQLException
{
return 0;
}
public int getMaxCursorNameLength() throws SQLException
{
return 0;
}
public int getMaxIndexLength() throws SQLException
{
return 0;
}
public int getMaxProcedureNameLength() throws SQLException
{
return 0;
}
public int getMaxRowSize() throws SQLException
{
return 0;
}
public int getMaxSchemaNameLength() throws SQLException
{
return 0;
}
public int getMaxStatementLength() throws SQLException
{
return 0;
}
public int getMaxStatements() throws SQLException
{
return 0;
}
public int getMaxTableNameLength() throws SQLException
{
return 0;
}
public int getMaxTablesInSelect() throws SQLException
{
return 0;
}
public int getMaxUserNameLength() throws SQLException
{
return 0;
}
public String getNumericFunctions() throws SQLException
{
return "";
}
public ResultSet getPrimaryKeys(String catalog, String schema, String table) throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
if (catalog == null || connection.getCatalog().equals(catalog))
{
if (schema == null) schema = connection.getSchema(); //limit to current schema if set
ResultSet rs = MetadataResultSets.instance.makePrimaryKeys(statement, schema, table);
return rs;
}
return new CassandraResultSet();
}
public ResultSet getProcedureColumns(String arg0, String arg1, String arg2, String arg3) throws SQLException
{
return new CassandraResultSet();
}
public String getProcedureTerm() throws SQLException
{
return "";
}
public ResultSet getProcedures(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public int getResultSetHoldability() throws SQLException
{
return CassandraResultSet.DEFAULT_HOLDABILITY;
}
public RowIdLifetime getRowIdLifetime() throws SQLException
{
return RowIdLifetime.ROWID_VALID_FOREVER;
}
public String getSQLKeywords() throws SQLException
{
return "";
}
public int getSQLStateType() throws SQLException
{
return sqlStateSQL;
}
public String getSchemaTerm() throws SQLException
{
return "Column Family";
}
public ResultSet getSchemas() throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
ResultSet rs = MetadataResultSets.instance.makeSchemas(statement, null);
return rs;
}
public ResultSet getSchemas(String catalog, String schemaPattern) throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
if (!(catalog == null || catalog.equals(statement.connection.getCatalog()) )){
throw new SQLSyntaxErrorException("catalog name must exactly match or be null");
}
ResultSet rs = MetadataResultSets.instance.makeSchemas(statement, schemaPattern);
return rs;
//return new CassandraResultSet();
}
public String getSearchStringEscape() throws SQLException
{
return "\\";
}
public String getStringFunctions() throws SQLException
{
return "";
}
public ResultSet getSuperTables(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getSuperTypes(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public String getSystemFunctions() throws SQLException
{
return "";
}
public ResultSet getTablePrivileges(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getTableTypes() throws SQLException
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
ResultSet result = MetadataResultSets.instance.makeTableTypes(statement);
return result;
}
public ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types) throws SQLException
{
boolean askingForTable = (types == null);
if (types != null)
{
for (String t: types)
{
if (MetadataResultSets.TABLE_CONSTANT.equals(t))
{
askingForTable = true;
break;
}
}
}
if ((catalog == null || connection.getCatalog().equals(catalog)) && askingForTable)
{
if(statement.isClosed()){
statement = new CassandraStatement(this.connection);
}
//if (schemaPattern == null) schemaPattern = connection.getSchema(); //limit to current schema if set
ResultSet rs = MetadataResultSets.instance.makeTables(statement, schemaPattern, tableNamePattern);
return rs;
}
return new CassandraResultSet();
}
public String getTimeDateFunctions() throws SQLException
{
return "";
}
public ResultSet getTypeInfo() throws SQLException
{
return new CassandraResultSet();
}
public ResultSet getUDTs(String arg0, String arg1, String arg2, int[] arg3) throws SQLException
{
return new CassandraResultSet();
}
public String getURL() throws SQLException
{
return connection.url;
}
public String getUserName() throws SQLException
{
return (connection.username==null) ? "" : connection.username;
}
public ResultSet getVersionColumns(String arg0, String arg1, String arg2) throws SQLException
{
return new CassandraResultSet();
}
public boolean insertsAreDetected(int arg0) throws SQLException
{
return false;
}
public boolean isCatalogAtStart() throws SQLException
{
return false;
}
public boolean isReadOnly() throws SQLException
{
return false;
}
public boolean locatorsUpdateCopy() throws SQLException
{
return false;
}
public boolean nullPlusNonNullIsNull() throws SQLException
{
return false;
}
public boolean nullsAreSortedAtEnd() throws SQLException
{
return false;
}
public boolean nullsAreSortedAtStart() throws SQLException
{
return true;
}
public boolean nullsAreSortedHigh() throws SQLException
{
return true;
}
public boolean nullsAreSortedLow() throws SQLException
{
return false;
}
public boolean othersDeletesAreVisible(int arg0) throws SQLException
{
return false;
}
public boolean othersInsertsAreVisible(int arg0) throws SQLException
{
return false;
}
public boolean othersUpdatesAreVisible(int arg0) throws SQLException
{
return false;
}
public boolean ownDeletesAreVisible(int arg0) throws SQLException
{
return false;
}
public boolean ownInsertsAreVisible(int arg0) throws SQLException
{
return false;
}
public boolean ownUpdatesAreVisible(int arg0) throws SQLException
{
return false;
}
public boolean storesLowerCaseIdentifiers() throws SQLException
{
return false;
}
public boolean storesLowerCaseQuotedIdentifiers() throws SQLException
{
return false;
}
public boolean storesMixedCaseIdentifiers() throws SQLException
{
return true;
}
public boolean storesMixedCaseQuotedIdentifiers() throws SQLException
{
return true;
}
public boolean storesUpperCaseIdentifiers() throws SQLException
{
return false;
}
public boolean storesUpperCaseQuotedIdentifiers() throws SQLException
{
return false;
}
public boolean supportsANSI92EntryLevelSQL() throws SQLException
{
return false;
}
public boolean supportsANSI92FullSQL() throws SQLException
{
return false;
}
public boolean supportsANSI92IntermediateSQL() throws SQLException
{
return false;
}
public boolean supportsAlterTableWithAddColumn() throws SQLException
{
return true;
}
public boolean supportsAlterTableWithDropColumn() throws SQLException
{
return true;
}
public boolean supportsBatchUpdates() throws SQLException
{
return false;
}
public boolean supportsCatalogsInDataManipulation() throws SQLException
{
return false;
}
public boolean supportsCatalogsInIndexDefinitions() throws SQLException
{
return false;
}
public boolean supportsCatalogsInPrivilegeDefinitions() throws SQLException
{
return false;
}
public boolean supportsCatalogsInProcedureCalls() throws SQLException
{
return false;
}
public boolean supportsCatalogsInTableDefinitions() throws SQLException
{
return false;
}
public boolean supportsColumnAliasing() throws SQLException
{
return false;
}
public boolean supportsConvert() throws SQLException
{
return false;
}
public boolean supportsConvert(int arg0, int arg1) throws SQLException
{
return false;
}
public boolean supportsCoreSQLGrammar() throws SQLException
{
return false;
}
public boolean supportsCorrelatedSubqueries() throws SQLException
{
return false;
}
public boolean supportsDataDefinitionAndDataManipulationTransactions() throws SQLException
{
return false;
}
public boolean supportsDataManipulationTransactionsOnly() throws SQLException
{
return false;
}
public boolean supportsDifferentTableCorrelationNames() throws SQLException
{
return false;
}
public boolean supportsExpressionsInOrderBy() throws SQLException
{
return false;
}
public boolean supportsExtendedSQLGrammar() throws SQLException
{
return false;
}
public boolean supportsFullOuterJoins() throws SQLException
{
return false;
}
public boolean supportsGetGeneratedKeys() throws SQLException
{
return false;
}
public boolean supportsGroupBy() throws SQLException
{
return false;
}
public boolean supportsGroupByBeyondSelect() throws SQLException
{
return false;
}
public boolean supportsGroupByUnrelated() throws SQLException
{
return false;
}
public boolean supportsIntegrityEnhancementFacility() throws SQLException
{
return false;
}
public boolean supportsLikeEscapeClause() throws SQLException
{
return false;
}
public boolean supportsLimitedOuterJoins() throws SQLException
{
return false;
}
public boolean supportsMinimumSQLGrammar() throws SQLException
{
return false;
}
public boolean supportsMixedCaseIdentifiers() throws SQLException
{
return true;
}
public boolean supportsMixedCaseQuotedIdentifiers() throws SQLException
{
return true;
}
public boolean supportsMultipleOpenResults() throws SQLException
{
return false;
}
public boolean supportsMultipleResultSets() throws SQLException
{
return false;
}
public boolean supportsMultipleTransactions() throws SQLException
{
return false;
}
public boolean supportsNamedParameters() throws SQLException
{
return false;
}
public boolean supportsNonNullableColumns() throws SQLException
{
return false;
}
public boolean supportsOpenCursorsAcrossCommit() throws SQLException
{
return false;
}
public boolean supportsOpenCursorsAcrossRollback() throws SQLException
{
return false;
}
public boolean supportsOpenStatementsAcrossCommit() throws SQLException
{
return false;
}
public boolean supportsOpenStatementsAcrossRollback() throws SQLException
{
return false;
}
public boolean supportsOrderByUnrelated() throws SQLException
{
return false;
}
public boolean supportsOuterJoins() throws SQLException
{
return false;
}
public boolean supportsPositionedDelete() throws SQLException
{
return false;
}
public boolean supportsPositionedUpdate() throws SQLException
{
return false;
}
public boolean supportsResultSetConcurrency(int arg0, int arg1) throws SQLException
{
return false;
}
public boolean supportsResultSetHoldability(int holdability) throws SQLException
{
return ResultSet.HOLD_CURSORS_OVER_COMMIT==holdability;
}
public boolean supportsResultSetType(int type) throws SQLException
{
return ResultSet.TYPE_FORWARD_ONLY==type;
}
public boolean supportsSavepoints() throws SQLException
{
return false;
}
public boolean supportsSchemasInDataManipulation() throws SQLException
{
return true;
}
public boolean supportsSchemasInIndexDefinitions() throws SQLException
{
return false;
}
public boolean supportsSchemasInPrivilegeDefinitions() throws SQLException
{
return false;
}
public boolean supportsSchemasInProcedureCalls() throws SQLException
{
return false;
}
public boolean supportsSchemasInTableDefinitions() throws SQLException
{
return false;
}
public boolean supportsSelectForUpdate() throws SQLException
{
return false;
}
public boolean supportsStatementPooling() throws SQLException
{
return false;
}
public boolean supportsStoredFunctionsUsingCallSyntax() throws SQLException
{
return false;
}
public boolean supportsStoredProcedures() throws SQLException
{
return false;
}
public boolean supportsSubqueriesInComparisons() throws SQLException
{
return false;
}
public boolean supportsSubqueriesInExists() throws SQLException
{
return false;
}
public boolean supportsSubqueriesInIns() throws SQLException
{
return false;
}
public boolean supportsSubqueriesInQuantifieds() throws SQLException
{
return false;
}
public boolean supportsTableCorrelationNames() throws SQLException
{
return false;
}
public boolean supportsTransactionIsolationLevel(int level) throws SQLException
{
return Connection.TRANSACTION_NONE==level;
}
public boolean supportsTransactions() throws SQLException
{
return false;
}
public boolean supportsUnion() throws SQLException
{
return false;
}
public boolean supportsUnionAll() throws SQLException
{
return false;
}
public boolean updatesAreDetected(int arg0) throws SQLException
{
return false;
}
public boolean usesLocalFilePerTable() throws SQLException
{
return false;
}
public boolean usesLocalFiles() throws SQLException
{
return false;
}
public boolean generatedKeyAlwaysReturned() throws SQLException
{
throw new SQLFeatureNotSupportedException(String.format(NOT_SUPPORTED));
}
public ResultSet getPseudoColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException
{
throw new SQLFeatureNotSupportedException(String.format(NOT_SUPPORTED));
}
}