Examples with AbstractType io.prestosql.spi.type.AbstractType used on opensource projects

Example 1 with AbstractType

use of io.prestosql.spi.type.AbstractType in project hetu-core by openlookeng.

the class MySqlClient method getColumns.

@SuppressWarnings("SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING")
@Override
public Map<String, ColumnHandle> getColumns(ConnectorSession session, String sql, Map<String, Type> types) {
    try (Connection connection = connectionFactory.openConnection(JdbcIdentity.from(session));
        PreparedStatement statement = connection.prepareStatement(sql)) {
        ResultSetMetaData metaData = statement.getMetaData();
        ImmutableMap.Builder<String, ColumnHandle> columnBuilder = new ImmutableMap.Builder<>();
        for (int i = 1; i <= metaData.getColumnCount(); i++) {
            String columnName = metaData.getColumnLabel(i);
            String typeName = metaData.getColumnTypeName(i);
            int precision = metaData.getPrecision(i);
            int dataType = metaData.getColumnType(i);
            int scale = metaData.getScale(i);
            // extracted from logical plan during pre-processing
            if (dataType == Types.DECIMAL && (precision > MAX_PRECISION || scale < 0)) {
                // Covert MySql Decimal type to Presto type
                Type type = types.get(columnName.toLowerCase(ENGLISH));
                if (type instanceof AbstractType) {
                    TypeSignature signature = type.getTypeSignature();
                    typeName = signature.getBase().toUpperCase(ENGLISH);
                    dataType = JDBCType.valueOf(typeName).getVendorTypeNumber();
                    if (type instanceof DecimalType) {
                        precision = ((DecimalType) type).getPrecision();
                        scale = ((DecimalType) type).getScale();
                    }
                }
            }
            boolean isNullable = metaData.isNullable(i) != ResultSetMetaData.columnNoNulls;
            JdbcTypeHandle typeHandle = new JdbcTypeHandle(dataType, Optional.ofNullable(typeName), precision, scale, Optional.empty());
            Optional<ColumnMapping> columnMapping;
            try {
                columnMapping = toPrestoType(session, connection, typeHandle);
            } catch (UnsupportedOperationException ex) {
                throw new PrestoException(JDBC_UNSUPPORTED_EXPRESSION, format("Data type [%s] is not support", typeHandle.getJdbcTypeName()));
            }
            // skip unsupported column types
            if (columnMapping.isPresent()) {
                Type type = columnMapping.get().getType();
                JdbcColumnHandle handle = new JdbcColumnHandle(columnName, typeHandle, type, isNullable);
                columnBuilder.put(columnName.toLowerCase(ENGLISH), handle);
            } else {
                return Collections.emptyMap();
            }
        }
        return columnBuilder.build();
    } catch (SQLException | PrestoException e) {
        throw new PrestoException(JDBC_QUERY_GENERATOR_FAILURE, String.format("Query generator failed for [%s]", e.getMessage()));
    }
}

Example 2 with AbstractType

use of io.prestosql.spi.type.AbstractType in project hetu-core by openlookeng.

the class OracleClient method getColumns.

@SuppressFBWarnings("SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING")
@Override
public Map<String, ColumnHandle> getColumns(ConnectorSession session, String sql, Map<String, Type> types) {
    try (Connection connection = connectionFactory.openConnection(JdbcIdentity.from(session));
        PreparedStatement statement = connection.prepareStatement(sql)) {
        ResultSetMetaData metadata = statement.getMetaData();
        ImmutableMap.Builder<String, ColumnHandle> builder = new ImmutableMap.Builder<>();
        for (int i = 1; i <= metadata.getColumnCount(); i++) {
            String columnName = metadata.getColumnLabel(i);
            String typeName = metadata.getColumnTypeName(i);
            int precision = metadata.getPrecision(i);
            int dataType = metadata.getColumnType(i);
            int scale = metadata.getScale(i);
            boolean isNullAble = metadata.isNullable(i) != ResultSetMetaData.columnNoNulls;
            // the type of that column as integer.
            if ((dataType == Types.DECIMAL || NUMBER_DATA_TYPE_NAME.equalsIgnoreCase(typeName)) && (precision == 0 || scale < 0)) {
                // Covert Oracle NUMBER(scale) type to Presto types
                String loweredColumnName = columnName.toLowerCase(ENGLISH);
                Type hetuType = types.get(loweredColumnName);
                if (hetuType instanceof AbstractType) {
                    TypeSignature signature = hetuType.getTypeSignature();
                    typeName = signature.getBase().toUpperCase(ENGLISH);
                    dataType = JDBCType.valueOf(typeName).getVendorTypeNumber();
                    if (hetuType instanceof DecimalType && this.roundingMode != RoundingMode.UNNECESSARY) {
                        precision = ((DecimalType) hetuType).getPrecision();
                        scale = ((DecimalType) hetuType).getScale();
                    }
                }
            }
            JdbcTypeHandle typeHandle = new JdbcTypeHandle(dataType, Optional.ofNullable(typeName), precision, scale, Optional.empty());
            Optional<ColumnMapping> columnMapping;
            try {
                columnMapping = toPrestoType(session, connection, typeHandle);
            } catch (UnsupportedOperationException ex) {
                // User configured to fail the query if the data type is not supported
                return Collections.emptyMap();
            }
            // skip unsupported column types
            if (columnMapping.isPresent()) {
                Type type = columnMapping.get().getType();
                JdbcColumnHandle handle = new JdbcColumnHandle(columnName, typeHandle, type, isNullAble);
                builder.put(columnName.toLowerCase(ENGLISH), handle);
            }
        }
        return builder.build();
    } catch (SQLException | PrestoException e) {
        // Returning empty map will indicate that something wrong and let the Presto to execute the query as usual.
        return Collections.emptyMap();
    }
}