Examples with ShowDatabasesStatement io.shardingjdbc.core.parsing.parser.dialect.mysql.statement.ShowDatabasesStatement used on opensource projects

Example 1 with ShowDatabasesStatement

use of io.shardingjdbc.core.parsing.parser.dialect.mysql.statement.ShowDatabasesStatement in project sharding-jdbc by shardingjdbc.

the class ParsingSQLRouter method route.

private RoutingResult route(final List<Object> parameters, final SQLStatement sqlStatement) {
    Collection<String> tableNames = sqlStatement.getTables().getTableNames();
    RoutingEngine routingEngine;
    if (sqlStatement instanceof UseStatement) {
        routingEngine = new IgnoreRoutingEngine();
    } else if (sqlStatement instanceof DDLStatement) {
        routingEngine = new TableBroadcastRoutingEngine(shardingRule, sqlStatement);
    } else if (sqlStatement instanceof ShowDatabasesStatement || sqlStatement instanceof ShowTablesStatement) {
        routingEngine = new DatabaseBroadcastRoutingEngine(shardingRule);
    } else if (sqlStatement instanceof DALStatement) {
        routingEngine = new UnicastRoutingEngine(shardingRule, sqlStatement);
    } else if (tableNames.isEmpty() && sqlStatement instanceof SelectStatement) {
        routingEngine = new UnicastRoutingEngine(shardingRule, sqlStatement);
    } else if (tableNames.isEmpty()) {
        routingEngine = new DatabaseBroadcastRoutingEngine(shardingRule);
    } else if (1 == tableNames.size() || shardingRule.isAllBindingTables(tableNames) || shardingRule.isAllInDefaultDataSource(tableNames)) {
        routingEngine = new StandardRoutingEngine(shardingRule, parameters, tableNames.iterator().next(), sqlStatement);
    } else {
        // TODO config for cartesian set
        routingEngine = new ComplexRoutingEngine(shardingRule, parameters, tableNames, sqlStatement);
    }
    return routingEngine.route();
}

Example 2 with ShowDatabasesStatement

use of io.shardingjdbc.core.parsing.parser.dialect.mysql.statement.ShowDatabasesStatement in project sharding-jdbc by shardingjdbc.

the class DALMergeEngineTest method assertMergeForShowDatabasesStatement.

@Test
public void assertMergeForShowDatabasesStatement() throws SQLException {
    DALStatement dalStatement = new ShowDatabasesStatement();
    DALMergeEngine dalMergeEngine = new DALMergeEngine(null, queryResults, dalStatement);
    assertThat(dalMergeEngine.merge(), instanceOf(ShowDatabasesMergedResult.class));
}

Example 3 with ShowDatabasesStatement

use of io.shardingjdbc.core.parsing.parser.dialect.mysql.statement.ShowDatabasesStatement in project sharding-jdbc by shardingjdbc.

the class MySQLShowParser method parse.

@Override
public DALStatement parse() {
    lexerEngine.nextToken();
    lexerEngine.skipIfEqual(DefaultKeyword.FULL);
    if (lexerEngine.equalAny(MySQLKeyword.DATABASES)) {
        return new ShowDatabasesStatement();
    }
    if (lexerEngine.skipIfEqual(MySQLKeyword.TABLES)) {
        DALStatement result = new ShowTablesStatement();
        if (lexerEngine.equalAny(DefaultKeyword.FROM, DefaultKeyword.IN)) {
            int beginPosition = lexerEngine.getCurrentToken().getEndPosition() - lexerEngine.getCurrentToken().getLiterals().length();
            lexerEngine.nextToken();
            lexerEngine.nextToken();
            result.getSqlTokens().add(new RemoveToken(beginPosition, lexerEngine.getCurrentToken().getEndPosition()));
        }
        return result;
    }
    if (lexerEngine.skipIfEqual(MySQLKeyword.COLUMNS, MySQLKeyword.FIELDS)) {
        DALStatement result = new ShowColumnsStatement();
        lexerEngine.skipIfEqual(DefaultKeyword.FROM, DefaultKeyword.IN);
        tableReferencesClauseParser.parseSingleTableWithoutAlias(result);
        if (lexerEngine.skipIfEqual(DefaultKeyword.FROM, DefaultKeyword.IN)) {
            int beginPosition = lexerEngine.getCurrentToken().getEndPosition() - lexerEngine.getCurrentToken().getLiterals().length();
            result.getSqlTokens().add(new SchemaToken(beginPosition, lexerEngine.getCurrentToken().getLiterals(), result.getTables().getSingleTableName()));
        }
        return result;
    }
    if (lexerEngine.skipIfEqual(DefaultKeyword.CREATE) && lexerEngine.skipIfEqual(DefaultKeyword.TABLE)) {
        DALStatement result = new ShowCreateTableStatement();
        tableReferencesClauseParser.parseSingleTableWithoutAlias(result);
        return result;
    }
    return new ShowOtherStatement();
}