Examples with SQLiteDatabaseMeta org.pentaho.di.core.database.SQLiteDatabaseMeta used on opensource projects

Example 1 with SQLiteDatabaseMeta

use of org.pentaho.di.core.database.SQLiteDatabaseMeta in project pentaho-kettle by pentaho.

the class ValueMetaBase method getValueFromSQLType.

@SuppressWarnings("fallthrough")
@Override
public ValueMetaInterface getValueFromSQLType(DatabaseMeta databaseMeta, String name, java.sql.ResultSetMetaData rm, int index, boolean ignoreLength, boolean lazyConversion) throws KettleDatabaseException {
    try {
        int length = -1;
        int precision = -1;
        int valtype = ValueMetaInterface.TYPE_NONE;
        boolean isClob = false;
        int type = rm.getColumnType(index);
        boolean signed = false;
        try {
            signed = rm.isSigned(index);
        } catch (Exception ignored) {
        // This JDBC Driver doesn't support the isSigned method
        // nothing more we can do here by catch the exception.
        }
        switch(type) {
            case java.sql.Types.CHAR:
            case java.sql.Types.VARCHAR:
            case java.sql.Types.NVARCHAR:
            case // Character Large Object
            java.sql.Types.LONGVARCHAR:
                valtype = ValueMetaInterface.TYPE_STRING;
                if (!ignoreLength) {
                    length = rm.getColumnDisplaySize(index);
                }
                break;
            case java.sql.Types.CLOB:
            case java.sql.Types.NCLOB:
                valtype = ValueMetaInterface.TYPE_STRING;
                length = DatabaseMeta.CLOB_LENGTH;
                isClob = true;
                break;
            case java.sql.Types.BIGINT:
                // 
                if (signed) {
                    valtype = ValueMetaInterface.TYPE_INTEGER;
                    // Max 9.223.372.036.854.775.807
                    precision = 0;
                    length = 15;
                } else {
                    valtype = ValueMetaInterface.TYPE_BIGNUMBER;
                    // Max 18.446.744.073.709.551.615
                    precision = 0;
                    length = 16;
                }
                break;
            case java.sql.Types.INTEGER:
                valtype = ValueMetaInterface.TYPE_INTEGER;
                // Max 2.147.483.647
                precision = 0;
                length = 9;
                break;
            case java.sql.Types.SMALLINT:
                valtype = ValueMetaInterface.TYPE_INTEGER;
                // Max 32.767
                precision = 0;
                length = 4;
                break;
            case java.sql.Types.TINYINT:
                valtype = ValueMetaInterface.TYPE_INTEGER;
                // Max 127
                precision = 0;
                length = 2;
                break;
            case java.sql.Types.DECIMAL:
            case java.sql.Types.DOUBLE:
            case java.sql.Types.FLOAT:
            case java.sql.Types.REAL:
            case java.sql.Types.NUMERIC:
                valtype = ValueMetaInterface.TYPE_NUMBER;
                length = rm.getPrecision(index);
                precision = rm.getScale(index);
                if (length >= 126) {
                    length = -1;
                }
                if (precision >= 126) {
                    precision = -1;
                }
                if (type == java.sql.Types.DOUBLE || type == java.sql.Types.FLOAT || type == java.sql.Types.REAL) {
                    if (precision == 0) {
                        // precision is obviously incorrect if the type if
                        precision = -1;
                    // Double/Float/Real
                    }
                    // If we're dealing with PostgreSQL and double precision types
                    if (databaseMeta.getDatabaseInterface() instanceof PostgreSQLDatabaseMeta && type == java.sql.Types.DOUBLE && precision >= 16 && length >= 16) {
                        precision = -1;
                        length = -1;
                    }
                    // The (12,31) that is given back is not correct
                    if (databaseMeta.getDatabaseInterface().isMySQLVariant()) {
                        if (precision >= length) {
                            precision = -1;
                            length = -1;
                        }
                    }
                    // if the length or precision needs a BIGNUMBER
                    if (length > 15 || precision > 15) {
                        valtype = ValueMetaInterface.TYPE_BIGNUMBER;
                    }
                } else {
                    if (precision == 0) {
                        if (length <= 18 && length > 0) {
                            // Among others Oracle is affected
                            // here.
                            // Long can hold up to 18
                            valtype = ValueMetaInterface.TYPE_INTEGER;
                        // significant digits
                        } else if (length > 18) {
                            valtype = ValueMetaInterface.TYPE_BIGNUMBER;
                        }
                    } else {
                        // we have a precision: keep NUMBER or change to BIGNUMBER?
                        if (length > 15 || precision > 15) {
                            valtype = ValueMetaInterface.TYPE_BIGNUMBER;
                        }
                    }
                }
                if (databaseMeta.getDatabaseInterface() instanceof PostgreSQLDatabaseMeta || databaseMeta.getDatabaseInterface() instanceof GreenplumDatabaseMeta) {
                    // undefined size => arbitrary precision
                    if (type == java.sql.Types.NUMERIC && length == 0 && precision == 0) {
                        valtype = ValueMetaInterface.TYPE_BIGNUMBER;
                        length = -1;
                        precision = -1;
                    }
                }
                if (databaseMeta.getDatabaseInterface() instanceof OracleDatabaseMeta) {
                    if (precision == 0 && length == 38) {
                        valtype = ((OracleDatabaseMeta) databaseMeta.getDatabaseInterface()).strictBigNumberInterpretation() ? TYPE_BIGNUMBER : TYPE_INTEGER;
                    }
                    if (precision <= 0 && length <= 0) {
                        // undefined size: BIGNUMBER,
                        // precision on Oracle can be 38, too
                        // big for a Number type
                        valtype = ValueMetaInterface.TYPE_BIGNUMBER;
                        length = -1;
                        precision = -1;
                    }
                }
                break;
            case java.sql.Types.TIMESTAMP:
                if (databaseMeta.supportsTimestampDataType()) {
                    valtype = ValueMetaInterface.TYPE_TIMESTAMP;
                    length = rm.getScale(index);
                }
                break;
            case java.sql.Types.DATE:
                if (databaseMeta.getDatabaseInterface() instanceof TeradataDatabaseMeta) {
                    precision = 1;
                }
            case java.sql.Types.TIME:
                valtype = ValueMetaInterface.TYPE_DATE;
                // 
                if (databaseMeta.getDatabaseInterface().isMySQLVariant()) {
                    String property = databaseMeta.getConnectionProperties().getProperty("yearIsDateType");
                    if (property != null && property.equalsIgnoreCase("false") && rm.getColumnTypeName(index).equalsIgnoreCase("YEAR")) {
                        valtype = ValueMetaInterface.TYPE_INTEGER;
                        precision = 0;
                        length = 4;
                        break;
                    }
                }
                break;
            case java.sql.Types.BOOLEAN:
            case java.sql.Types.BIT:
                valtype = ValueMetaInterface.TYPE_BOOLEAN;
                break;
            case java.sql.Types.BINARY:
            case java.sql.Types.BLOB:
            case java.sql.Types.VARBINARY:
            case java.sql.Types.LONGVARBINARY:
                valtype = ValueMetaInterface.TYPE_BINARY;
                if (databaseMeta.isDisplaySizeTwiceThePrecision() && (2 * rm.getPrecision(index)) == rm.getColumnDisplaySize(index)) {
                    // set the length for "CHAR(X) FOR BIT DATA"
                    length = rm.getPrecision(index);
                } else if ((databaseMeta.getDatabaseInterface() instanceof OracleDatabaseMeta) && (type == java.sql.Types.VARBINARY || type == java.sql.Types.LONGVARBINARY)) {
                    // set the length for Oracle "RAW" or "LONGRAW" data types
                    valtype = ValueMetaInterface.TYPE_STRING;
                    length = rm.getColumnDisplaySize(index);
                } else if (databaseMeta.isMySQLVariant() && (type == java.sql.Types.VARBINARY || type == java.sql.Types.LONGVARBINARY)) {
                    // PDI-6677 - don't call 'length = rm.getColumnDisplaySize(index);'
                    // keep the length to -1, e.g. for string functions (e.g.
                    length = -1;
                // CONCAT see PDI-4812)
                } else if (databaseMeta.getDatabaseInterface() instanceof SQLiteDatabaseMeta) {
                    valtype = ValueMetaInterface.TYPE_STRING;
                } else {
                    length = -1;
                }
                precision = -1;
                break;
            default:
                valtype = ValueMetaInterface.TYPE_STRING;
                precision = rm.getScale(index);
                break;
        }
        ValueMetaInterface v = ValueMetaFactory.createValueMeta(name, valtype);
        v.setLength(length);
        v.setPrecision(precision);
        v.setLargeTextField(isClob);
        getOriginalColumnMetadata(v, rm, index, ignoreLength);
        // 
        if (lazyConversion && valtype == ValueMetaInterface.TYPE_STRING) {
            v.setStorageType(ValueMetaInterface.STORAGE_TYPE_BINARY_STRING);
            // 
            try {
                ValueMetaInterface storageMetaData = ValueMetaFactory.cloneValueMeta(v, ValueMetaInterface.TYPE_STRING);
                storageMetaData.setStorageType(ValueMetaInterface.STORAGE_TYPE_NORMAL);
                v.setStorageMetadata(storageMetaData);
            } catch (Exception e) {
                throw new SQLException(e);
            }
        }
        ValueMetaInterface newV = null;
        try {
            newV = databaseMeta.getDatabaseInterface().customizeValueFromSQLType(v, rm, index);
        } catch (SQLException e) {
            throw new SQLException(e);
        }
        return newV == null ? v : newV;
    } catch (Exception e) {
        throw new KettleDatabaseException("Error determining value metadata from SQL resultset metadata", e);
    }
}