/*
* Update a single column.
*
* @param column the column name
* @param value the String value with which update the column
* @see tinySQLTable#UpdateCol
*
*/
public override void UpdateCol(String colName, String value) //throws TinySQLException
{
String shortColumnName;
try
{
/*
* If it's the pseudo column _DELETED, return
*/
if (colName.equals("_DELETED"))
{
return;
}
/*
* Retrieve the TsColumn object which corresponds to this column.
*/
shortColumnName = TinySQLGlobals.getShortName(colName);
TsColumn column = (TsColumn)column_info.get(shortColumnName);
if (column == null)
{
throw new TinySQLException("Can't update field=" + colName);
}
if (Utils.isDateColumn(column.type))
{
/*
* Convert non-blank dates to the standard YYYYMMDD format.
*/
if (value.trim().length() > 0)
{
value = UtilString.dateValue(value);
}
}
/*
* Seek the starting offset of the current record,
* as indicated by currentRecordNumber
*/
ftbl.seek(dbfHeader.headerLength + (currentRecordNumber - 1) * dbfHeader.recordLength + column.position);
/*
* Enforce the correct column length, transform to byte and write to file
*/
value = Utils.forceToSize(value, column.size, " ");
byte[] b = value.getBytes(Utils.encode);
ftbl.write(b);
dbfHeader.setTimestamp(ftbl);
}
catch (Exception e)
{
throw new TinySQLException(e.getMessage());
}
}
/**
*
* returns a new dbfFileConnection object, which is cast
* to a tinySQLConnection object.
*
* @exception SQLException when an error occurs
* @param user the username - currently unused
* @param url the url to the data source
* @param d the Driver object.
*
*/
public override TinySQLConnection getConnection
(String user, String url, java.sql.Driver d)
{//throws SQLException {
if (url != (String)null)
{
if (url.length() > 13)
{
TinySQLGlobals.readLongNames(url.substring(13));
}
}
return((TinySQLConnection) new DBFFileConnection(user, url, d));
}
/*
* Get a column object for the named column.
*/
public TsColumn getColumn(String colName) //throws TinySQLException
{
int foundDot;
String columnName;
columnName = colName;
foundDot = columnName.indexOf(".");
if (foundDot > -1)
{
columnName = columnName.substring(foundDot + 1);
}
columnName = TinySQLGlobals.getShortName(columnName);
TsColumn coldef = (TsColumn)column_info.get(columnName);
if (coldef == (TsColumn)null)
{
throw new TinySQLException("Column " + columnName + " does not"
+ " exist in table " + table);
}
return(coldef);
}
/**
* The name of a given column
* @see java.sql.ResultSetMetaData#getColumnName
* @param column the column whose name is wanted
* @return the name of the requested column
*/
public String getColumnName(int column)
{// throws SQLException {
// get the column and return its name
//
String columnName;
int dotAt;
TsColumn col = tsql.columnAtIndex(column - 1);
dotAt = col.name.indexOf(".");
columnName = col.name;
if (dotAt > -1)
{
columnName = col.name.substring(dotAt + 1);
}
if (col.alias != (String)null)
{
if (!col.alias.equals(columnName))
{
return(col.alias);
}
}
columnName = TinySQLGlobals.getLongName(columnName);
return(columnName);
}
/*
* Parse out the column definition for a CREATE statement.
*/
public TsColumn parseColumnDefn(String columnDefn) //throws TinySQLException
{
TsColumn createColumn;
int i;
FieldTokenizer ft;
String columnName, colTypeStr, colTypeSpec;
ft = new FieldTokenizer(columnDefn.toUpperCase(), ' ', false);
/*
* A column definition must consist of a column name followed by a
* column specification.
*/
if (ft.countFields() < 2)
{
throwException(2);
}
columnName = ft.getField(0);
/*
* Check for quotes around a column name that may contain blanks.
*/
if (columnName.charAt(0) == '"' &
columnName.charAt(columnName.length() - 1) == '"')
{
columnName = columnName.substring(1, columnName.length() - 1);
}
if (columnName.length() > 11)
{
columnName = TinySQLGlobals.getShortName(columnName);
}
createColumn = new TsColumn(columnName);
colTypeStr = "";
for (i = 1; i < ft.countFields(); i++)
{
colTypeStr += ft.getField(1);
}
ft = new FieldTokenizer(colTypeStr, '(', false);
colTypeStr = ft.getField(0);
createColumn.size = 10;
createColumn.decimalPlaces = 0;
if (colTypeStr.equals("FLOAT"))
{
createColumn.size = 12;
createColumn.decimalPlaces = 2;
}
colTypeSpec = ft.getField(1);
if (!colTypeSpec.equals("NULL"))
{
/*
* Parse out the scale and precision if supplied.
*/
ft = new FieldTokenizer(colTypeSpec, ',', false);
createColumn.size = ft.getInt(0, 8);
createColumn.decimalPlaces = ft.getInt(1, 0);
}
createColumn.type = java.lang.Integer.MIN_VALUE;
for (i = 0; i < colTypeNames.Length; i++)
{
if (colTypeStr.equals(colTypeNames[i]))
{
createColumn.type = colTypes[i];
}
}
if (createColumn.type == java.lang.Integer.MIN_VALUE)
{
throwException(8);
}
if (TinySQLGlobals.PARSER_DEBUG)
{
java.lang.SystemJ.outJ.println("Column " + createColumn.name
+ ", type is " + createColumn.type + ",size is " + createColumn.size
+ ",precision is " + createColumn.decimalPlaces);
}
return(createColumn);
}
/*
* This method sets up particular phrase elements for the SQL command.
* Examples would be a list of selected columns and tables for a SELECT
* statement, or a list of column definitions for a CREATE TABLE
* statement. These phrase elements will be added to the action list
* once the entire statement has been parsed.
*/
public void setPhrase(String inputKeyWord, String inputString)
//throws TinySQLException
{
String nextField, upperField,
fieldString, tempString, columnName, columnAlias;
java.lang.StringBuffer concatBuffer;
FieldTokenizer ft1, ft2, ft3;
TsColumn createColumn;
/*
* Handle compound keywords.
*/
if (inputString == (String)null)
{
lastKeyWord = inputKeyWord;
return;
}
else if (inputString.trim().length() == 0)
{
lastKeyWord = inputKeyWord;
return;
}
if (TinySQLGlobals.PARSER_DEBUG)
{
java.lang.SystemJ.outJ.println("setPhrase " + inputString);
}
ft1 = new FieldTokenizer(inputString, ',', false);
while (ft1.hasMoreFields())
{
nextField = ft1.nextField().trim();
if (TinySQLGlobals.PARSER_DEBUG)
{
java.lang.SystemJ.outJ.println(inputKeyWord + " field is " + nextField);
}
upperField = nextField.toUpperCase();
if (inputKeyWord.equals("SELECT"))
{
/*
* Check for the keyword DISTINCT
*/
if (nextField.toUpperCase().startsWith("DISTINCT"))
{
distinct = true;
nextField = nextField.substring(9).trim();
}
/*
* Check for and set column alias.
*/
ft2 = new FieldTokenizer(nextField, ' ', false);
columnName = ft2.getField(0);
columnAlias = (String)null;
/*
* A column alias can be preceded by the keyword AS which will
* be ignored by tinySQL.
*/
if (ft2.countFields() == 2)
{
columnAlias = ft2.getField(1);
}
else if (ft2.countFields() == 3)
{
columnAlias = ft2.getField(2);
}
/*
* Check for column concatenation using the | symbol
*/
ft2 = new FieldTokenizer(columnName, '|', false);
if (ft2.countFields() > 1)
{
concatBuffer = new java.lang.StringBuffer("CONCAT(");
while (ft2.hasMoreFields())
{
if (concatBuffer.length() > 7)
{
concatBuffer.append(",");
}
concatBuffer.append(ft2.nextField());
}
columnName = concatBuffer.toString() + ")";
}
columnList.addElement(columnName);
columnAliasList.addElement(columnAlias);
contextList.addElement(inputKeyWord);
}
else if (inputKeyWord.equals("TABLE"))
{
/*
* If the input keyword is TABLE, update the statement type to be a
* compound type such as CREATE_TABLE, DROP_TABLE, or ALTER_TABLE.
*/
if (!statementType.equals("INSERT"))
{
statementType = statementType + "_TABLE";
}
if (statementType.equals("CREATE_TABLE"))
{
/*
* Parse out the column definition.
*/
ft2 = new FieldTokenizer(nextField, '(', false);
if (ft2.countFields() != 2)
{
throwException(1);
}
tableName = ft2.getField(0);
fieldString = ft2.getField(1);
ft2 = new FieldTokenizer(fieldString, ',', false);
while (ft2.hasMoreFields())
{
tempString = ft2.nextField();
createColumn = parseColumnDefn(tempString);
if (createColumn != (TsColumn)null)
{
columnList.addElement(createColumn);
}
}
}
else if (statementType.equals("DROP_TABLE"))
{
/*
* Handle dropping of non-existent tables
*/
tableName = upperField;
try
{
validateTable(upperField, true);
} catch (Exception) {
throw new TinySQLException("Table " + tableName
+ " does not exist.");
}
}
else
{
tableName = upperField;
validateTable(upperField, true);
}
}
else if (inputKeyWord.equals("BY"))
{
/*
* Set up Group by and Order by columns.
*/
if (lastKeyWord == (String)null)
{
throwException(6);
}
else
{
ft3 = new FieldTokenizer(upperField, ' ', false);
columnList.addElement(ft3.getField(0));
if (ft3.countFields() == 2)
{
/*
* ASC or DESC are the only allowable directives after GROUP BY
*/
if (ft3.getField(1).startsWith("ASC") |
ft3.getField(1).startsWith("DESC"))
{
orderType = ft3.getField(1);
}
else
{
throwException(7);
}
}
if (lastKeyWord.equals("ORDER"))
{
defaultOrderBy = false;
}
contextList.addElement(lastKeyWord);
}
}
else if (inputKeyWord.equals("DROP"))
{
/*
* Parse list of columns to be dropped.
*/
statementType = "ALTER_DROP";
ft2 = new FieldTokenizer(upperField, ' ', false);
while (ft2.hasMoreFields())
{
columnList.addElement(UtilString.removeQuotes(ft2.nextField()));
}
}
else if (inputKeyWord.equals("RENAME"))
{
/*
* Parse old and new column name.
*/
statementType = "ALTER_RENAME";
ft2 = new FieldTokenizer(upperField, ' ', false);
oldColumnName = ft2.getField(0);
newColumnName = ft2.getField(1);
if (newColumnName.equals("TO") & ft2.countFields() == 3)
{
newColumnName = ft2.getField(2);
}
if (newColumnName.length() > 11)
{
newColumnName = TinySQLGlobals.getShortName(newColumnName);
}
}
else if (inputKeyWord.equals("ADD"))
{
/*
* Parse definition of columns to be added.
*/
statementType = "ALTER_ADD";
createColumn = parseColumnDefn(nextField);
if (createColumn != (TsColumn)null)
{
columnList.addElement(createColumn);
}
}
else if (inputKeyWord.equals("FROM"))
{
/*
* Check for valid table
*/
tableName = upperField;
validateTable(tableName);
}
else if (inputKeyWord.equals("INTO"))
{
ft2 = new FieldTokenizer(nextField, '(', false);
if (ft2.countFields() != 2)
{
throwException(3);
}
tableName = ft2.getField(0).toUpperCase();
validateTable(tableName);
fieldString = ft2.getField(1).toUpperCase();
ft2 = new FieldTokenizer(fieldString, ',', false);
while (ft2.hasMoreFields())
{
tempString = UtilString.removeQuotes(ft2.nextField());
columnList.addElement(tempString);
contextList.addElement(inputKeyWord);
}
}
else if (inputKeyWord.equals("VALUES"))
{
ft2 = new FieldTokenizer(nextField, '(', false);
fieldString = ft2.getField(0);
ft2 = new FieldTokenizer(fieldString, ',', false);
while (ft2.hasMoreFields())
{
tempString = UtilString.removeQuotes(ft2.nextField());
tempString = UtilString.replaceAll(tempString, "''", "'");
valueList.addElement(tempString);
}
}
else if (inputKeyWord.equals("UPDATE"))
{
tableName = nextField.toUpperCase();
validateTable(tableName);
}
else if (inputKeyWord.equals("SET"))
{
/*
* Parse the update column name/value pairs
*/
ft2 = new FieldTokenizer(nextField, '=', false);
if (ft2.countFields() != 2)
{
throwException(4);
}
columnList.addElement(ft2.getField(0));
contextList.addElement(inputKeyWord);
valueList.addElement(UtilString.removeQuotes(ft2.getField(1)));
}
else if (inputKeyWord.equals("WHERE"))
{
whereClause = new TinySQLWhere(nextField, tables);
}
else if (!inputKeyWord.equals("TABLE"))
{
throwException(10);
}
}
lastKeyWord = inputKeyWord;
}
/*
*
* Read SQL Statements from the SQLStream, and
* return a result set for the last SQL Statement
* executed.
*
* @returns the ResultSet or null, if no result set was created
* @exception TinySQLException
*
*/
protected virtual TsResultSet sql(Object s) //throws TinySQLException
{
/*
* Build the ResultSet
*/
TsResultSet rs = null;
TinySQLTable jtbl;
TinySQLPreparedStatement pstmt = (TinySQLPreparedStatement)null;
bool distinct = false;
java.util.Vector <Object> actions, columns, columnDefs, values;
String actionType, orderType, tableName, statementType, byteString;
java.util.Hashtable <Object, Object> h, selectTables;
byte[] bStream;
java.io.ByteArrayInputStream st;
int i;
String actionString;
groupBreak = false;
statementType = s.getClass().getName();
try
{
/*
* Instantiate a new parser object which reads from the SQLStream. This
* should probably be changed to a String at some point. Note that
* parsing is only done once for a PreparedStatement.
*/
actions = (java.util.Vector <Object>)null;
if (statementType.endsWith("tinySQLPreparedStatement"))
{
pstmt = (TinySQLPreparedStatement)s;
pstmt.updateActions(actions);
actions = pstmt.getActions();
byteString = pstmt.getSQLString();
bStream = (byte[])null;
if (pstmt.getSQLString() != (String)null)
{
bStream = pstmt.getSQLString().getBytes();
}
}
else if (statementType.endsWith("tinySQLStatement"))
{
bStream = ((TinySQLStatement)s).getSQLString().getBytes();
}
else
{
throw new TinySQLException("Unknown statement type"
+ statementType);
}
if (actions == (java.util.Vector <Object>)null)
{
st = new java.io.ByteArrayInputStream(bStream);
SQLStream = (java.io.InputStream)st;
TinySQLParser tinyp = new TinySQLParser(SQLStream, this);
TinySQLGlobals.writeLongNames();
actions = tinyp.getActions();
if (statementType.endsWith("tinySQLPreparedStatement"))
{
pstmt.updateActions(actions);
}
}
/*
* The actions Vector consists of a list of Hashtables. Each of these
* action Hashtables contains elements required for a particular SQL
* statement. The following elements are used for various actions;
*
* Type Name Description
*
* String tableName The name of the affected table for
* CREATE,INSERT,UPDATE,DELETE actions.
*
* Hashtable selectTables Hashtable of tables in a SELECT action.
*
* Vector columns A list of column names used by the
* the action.
*
* Vector columnContexts A list of Strings indicating the context
* for the elements in the columns Vector.
* Values can be SELECT,ORDER,GROUP.
*
* Vector columnDefs A list of column objects used by the
* CREATE TABLE and ALTER TABLE ADD actions.
*
* Vector values A list of String values used in INSERT
* and UPDATE actions.
*
* String oldColumnName Old column name for the
* ALTER TABLE RENAME action.
*
* String newColumnName New column name for the
* ALTER TABLE RENAME action.
*
* String orderType Type or ORDER BY - ASC or DESC.
*
* String distinct Distinct rows only - TRUE or NULL
*
* tinySQLWhere whereClause An object containing the where clause
* which can be updated and queried.
*/
for (i = 0; i < actions.size(); i++)
{
h = (java.util.Hashtable <Object, Object>)actions.elementAt(i);
actionType = (String)h.get("TYPE");
if (TinySQLGlobals.DEBUG)
{
java.lang.SystemJ.outJ.println("Action: " + actionType);
}
/*
* Many actions have a table specification. If this one, build
* a table object to update the where clause if there is one.
*/
tableName = (String)h.get("TABLE");
wc = (TinySQLWhere)h.get("WHERE");
if (tableName != (String)null & !actionType.equals("DROP_TABLE") &
!actionType.equals("CREATE_TABLE") & !actionType.equals("INSERT")
& !actionType.startsWith("ALTER"))
{
jtbl = getTable(tableName);
/*
* For prepared statements, store any table objects that
* are created so that they can be explicitly closed when
* the statement processing is complete.
*/
if (statementType.endsWith("tinySQLPreparedStatement"))
{
pstmt.addTable(jtbl);
}
}
actionString = UtilString.actionToString(h);
if (debug)
{
java.lang.SystemJ.outJ.println("ACTION: " + actionString);
}
if (actionType.equals("UPDATE"))
{
/*
* SQL UPDATE
*/
columns = (java.util.Vector <Object>)h.get("COLUMNS");
values = (java.util.Vector <Object>)h.get("VALUES");
UpdateStatement(tableName, columns, values, wc);
}
else if (actionType.equals("DELETE"))
{
/*
* SQL DELETE
*/
DeleteStatement(tableName, wc);
}
else if (actionType.equals("SELECT"))
{
/*
* SQL SELECT
*/
selectTables = (java.util.Hashtable <Object, Object>)h.get("TABLES");
columns = (java.util.Vector <Object>)h.get("COLUMNS");
orderType = (String)h.get("ORDER_TYPE");
if ((String)h.get("DISTINCT") != (String)null)
{
distinct = true;
}
rs = SelectStatement(selectTables, columns,
wc, orderType, distinct, s);
}
else if (actionType.equals("INSERT"))
{
/*
* SQL INSERT
*/
columns = (java.util.Vector <Object>)h.get("COLUMNS");
values = (java.util.Vector <Object>)h.get("VALUES");
InsertStatement(statementType, tableName, columns, values);
}
else if (actionType.equals("CREATE_TABLE"))
{
/*
* SQL CREATE TABLE
*
* CREATE TABLE User(user_oid NUMBER(8) NOT NULL,
* userType VARCHAR(80) DEFAULT '-' NOT NULL,
* PRIMARY KEY (user_oid))
*
* -> DEFAULT / NOT NULL / PRIMARY KEY is not supported
*
*/
columnDefs = (java.util.Vector <Object>)h.get("COLUMN_DEF");
CreateTable(tableName, columnDefs);
}
else if (actionType.equals("ALTER_ADD"))
{
/*
* SQL ALTER TABLE ADD
*/
columnDefs = (java.util.Vector <Object>)h.get("COLUMN_DEF");
AlterTableAddCol(tableName, columnDefs);
}
else if (actionType.equals("ALTER_DROP"))
{
/*
* SQL ALTER TABLE DROP
*/
columns = (java.util.Vector <Object>)h.get("COLUMNS");
AlterTableDropCol(tableName, columns);
}
else if (actionType.equals("ALTER_RENAME"))
{
/*
* SQL ALTER TABLE RENAME
*/
String oldColumnName = (String)h.get("OLD_COLUMN");
String newColumnName = (String)h.get("NEW_COLUMN");
AlterTableRenameCol(tableName, oldColumnName, newColumnName);
}
else if (actionType.equals("DROP_TABLE"))
{
/*
* SQL DROP TABLE
*/
DropTable(tableName);
}
else
{
java.lang.SystemJ.outJ.println("Unrecognized action " + actionType);
}
}
}
catch (java.lang.Throwable e)
{
if (TinySQLGlobals.EX_DEBUG)
{
e.printStackTrace(java.lang.SystemJ.outJ);
}
throw new TinySQLException(e.getMessage());
}
return(rs);
}
/**
* Gets a description of table columns available in
* the specified catalog.
*
* <P>Only column descriptions matching the catalog, schema, table
* and column name criteria are returned. They are ordered by
* TABLE_SCHEM, TABLE_NAME and ORDINAL_POSITION.
*
* <P>Each column description has the following columns:
* <OL>
* <LI><B>TABLE_CAT</B> String => table catalog (may be null)
* <LI><B>TABLE_SCHEM</B> String => table schema (may be null)sRow record = new TsRow();
*
* <LI><B>TABLE_NAME</B> String => table name
* <LI><B>COLUMN_NAME</B> String => column name
* <LI><B>DATA_TYPE</B> short => SQL type from java.sql.Types
* <LI><B>TYPE_NAME</B> String => Data source dependent type name,
* for a UDT the type name is fully qualified
* <LI><B>COLUMN_SIZE</B> int => column size. For char or date
* types this is the maximum number of characters, for numeric or
* decimal types this is precision.
* <LI><B>BUFFER_LENGTH</B> is not used.
* <LI><B>DECIMAL_DIGITS</B> int => the number of fractional digits
* <LI><B>NUM_PREC_RADIX</B> int => Radix (typically either 10 or 2)
* <LI><B>NULLABLE</B> int => is NULL allowed?
* <UL>
* <LI> columnNoNulls - might not allow NULL values
* <LI> columnNullable - definitely allows NULL values
* <LI> columnNullableUnknown - nullability unknown
* </UL>
* <LI><B>REMARKS</B> String => comment describing column (may be null)
* <LI><B>COLUMN_DEF</B> String => default value (may be null)
* <LI><B>SQL_DATA_TYPE</B> int => unused
* <LI><B>SQL_DATETIME_SUB</B> int => unused
* <LI><B>CHAR_OCTET_LENGTH</B> int => for char types the
* maximum number of bytes in the column
* <LI><B>ORDINAL_POSITION</B> int => index of column in table
* (starting at 1)
* <LI><B>IS_NULLABLE</B> String => "NO" means column definitely
* does not allow NULL values; "YES" means the column might
* allow NULL values. An empty string means nobody knows.
* </OL>
*
* @param catalog a catalog name; "" retrieves those without a
* catalog; null means drop catalog name from the selection criteria
* @param schemaPattern a schema name pattern; "" retrieves those
* without a schema
* @param tableNamePattern a table name pattern
* @param columnNamePattern a column name pattern
* @return ResultSet - each row is a column description
* @exception SQLException if a database access error occurs
* @see #getSearchStringEscape
*/
public override java.sql.ResultSet getColumns(String catalog, String schemaPattern,
String tableNamePattern, String columnNamePattern)
{
int i;
String columnNameKey;
try
{
String dataDir = getDataDir();
Utils.log("Entering getColumns(tableNamePattern='" + tableNamePattern + "')");
if (dataDir == null)
{
return(null);
}
java.sql.ResultSet tableRs = getTables(catalog, schemaPattern, tableNamePattern, null);
TsResultSet jrs = new TsResultSet();
TsColumn jsc = new TsColumn("TABLE_CAT");
jsc.type = java.sql.Types.CHAR;
jsc.size = 9;
jrs.addColumn(jsc);
jsc = new TsColumn("TABLE_SCHEM");
jsc.type = java.sql.Types.CHAR;
jsc.size = 11;
jrs.addColumn(jsc);
jsc = new TsColumn("TABLE_NAME");
jsc.type = java.sql.Types.CHAR;
jsc.size = 10;
jrs.addColumn(jsc);
jsc = new TsColumn("COLUMN_NAME");
jsc.type = java.sql.Types.CHAR;
jsc.size = 11;
jrs.addColumn(jsc);
jsc = new TsColumn("DATA_TYPE");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 6;
jrs.addColumn(jsc);
jsc = new TsColumn("TYPE_NAME");
jsc.type = java.sql.Types.CHAR;
jsc.size = 9;
jrs.addColumn(jsc);
jsc = new TsColumn("COLUMN_SIZE");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 8;
jrs.addColumn(jsc);
jsc = new TsColumn("BUFFER_LENGTH");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 8;
jrs.addColumn(jsc);
jsc = new TsColumn("DECIMAL_DIGITS");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 8;
jrs.addColumn(jsc);
jsc = new TsColumn("NUM_PREC_RADIX");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 8;
jrs.addColumn(jsc);
jsc = new TsColumn("NULLABLE");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 8;
jrs.addColumn(jsc);
jsc = new TsColumn("REMARKS");
jsc.type = java.sql.Types.CHAR;
jsc.size = 128;
jrs.addColumn(jsc);
jsc = new TsColumn("COLUMN_DEF");
jsc.type = java.sql.Types.CHAR;
jsc.size = 128;
jrs.addColumn(jsc);
jsc = new TsColumn("SQL_DATA_TYPE");
jsc.type = java.sql.Types.INTEGER;
jsc.size = 128;
jrs.addColumn(jsc);
// Several parameters missing.
jsc = new TsColumn("IS_NULLABLE");
jsc.type = java.sql.Types.CHAR;
jsc.size = 3;
jrs.addColumn(jsc);
while (tableRs.next())
{ // process each DBF file and extract column info ...
String tableName = tableRs.getString("TABLE_NAME");
DBFFileTable tbl;
try
{
tbl = new DBFFileTable(dataDir, tableName);
}
catch (Exception)
{
continue; // ignore buggy and empty (zero byte size) DBF files
}
Utils.log("Accessing column info for table " + tableName);
java.util.Hashtable <Object, Object> column_info = tbl.column_info;
for (i = 0; i < tbl.columnNameKeys.size(); i++)
{
columnNameKey = (String)tbl.columnNameKeys.elementAt(i);
TsColumn tsc = (TsColumn)column_info.get(columnNameKey);
// process each column of the current table ...
TsRow record = new TsRow();
record.put("TABLE_CAT", "");
record.put("TABLE_SCHEM", "");
record.put("TABLE_NAME", tableName);
record.put("COLUMN_NAME", TinySQLGlobals.getLongName(tsc.name));
record.put("DATA_TYPE", new java.lang.Integer(tsc.type).toString());
record.put("TYPE_NAME", DBFFile.typeToLiteral(tsc.type).toString());
record.put("COLUMN_SIZE", new java.lang.Integer(tsc.size).toString());
record.put("DECIMAL_DIGITS", new java.lang.Integer(tsc.decimalPlaces).toString());
int nullable = columnNoNulls;
if (tsc.notNull == true)
{
nullable = columnNullable;
}
record.put("NULLABLE", new java.lang.Integer(nullable).toString());
record.put("REMARKS", "noRemarks");
String defaultVal = tsc.defaultVal;
if (defaultVal == null)
{
defaultVal = "";
}
record.put("COLUMN_DEF", defaultVal);
String isNullable = "NO";
if (tsc.notNull == true)
{
isNullable = "YES";
}
record.put("IS_NULLABLE", isNullable);
/*
* Suppress any sorting of the ResultSet. Column Metadata should
* be presented in the order the columns exist in the dBase header.
*/
jrs.addRow(record, false);
}
tbl.close();
tbl = null;
}
return(new TinySQLResultSet(jrs, (TinySQLStatement)null));
}
catch (Exception)
{
return(null);
}
}
internal TsColumn(String s, java.util.Hashtable <Object, Object> tableDefs, String inputContext)
//throws tinySQLException
{
FieldTokenizer ft, ftArgs;
int j, numericType, nameLength, dotAt, argIndex;
String upperName, checkName, nextArg;
TinySQLTable jtbl;
TsColumn tcol;
java.util.Vector <Object> t;
java.util.Enumeration <Object> col_keys;
name = s;
longName = name;
nameLength = name.length();
contextList = new java.util.Vector <Object>();
contextList.addElement(inputContext);
ft = new FieldTokenizer(name, '(', false);
if (ft.countFields() == 2)
{
/*
* This is a function rather than a simple column or constant
*/
functionName = ft.getField(0).toUpperCase();
if (functionName.equals("COUNT"))
{
type = java.sql.Types.INTEGER;
size = 10;
intValue = java.lang.Integer.MIN_VALUE;
groupedColumn = true;
}
else if (functionName.equals("SUM"))
{
type = java.sql.Types.FLOAT;
size = 10;
groupedColumn = true;
}
else if (functionName.equals("TO_DATE"))
{
type = java.sql.Types.DATE;
size = 10;
}
else if (functionName.equals("CONCAT") |
functionName.equals("UPPER") |
functionName.equals("SUBSTR") |
functionName.equals("TRIM"))
{
type = java.sql.Types.CHAR;
}
functionArgString = ft.getField(1);
ftArgs = new FieldTokenizer(functionArgString, ',', false);
functionArgs = new java.util.Vector <Object>();
argIndex = 0;
while (ftArgs.hasMoreFields())
{
nextArg = ftArgs.nextField();
tcol = new TsColumn(nextArg, tableDefs, inputContext);
if (tcol.isGroupedColumn())
{
groupedColumn = true;
}
/*
* MAX and MIN functions can be either FLOAT or CHAR types
* depending upon the type of the argument.
*/
if (functionName.equals("MAX") | functionName.equals("MIN"))
{
if (argIndex > 0)
{
throw new TinySQLException("Function can only have 1 argument");
}
groupedColumn = true;
type = tcol.type;
size = tcol.size;
}
else if (functionName.equals("CONCAT"))
{
type = java.sql.Types.CHAR;
size += tcol.size;
}
else if (functionName.equals("UPPER"))
{
type = java.sql.Types.CHAR;
size = tcol.size;
}
else if (functionName.equals("TO_DATE"))
{
type = java.sql.Types.DATE;
size = 10;
}
else if (functionName.equals("TRIM"))
{
type = java.sql.Types.CHAR;
size = tcol.size;
}
else if (functionName.equals("SUBSTR"))
{
type = java.sql.Types.CHAR;
if (argIndex == 0 & tcol.type != java.sql.Types.CHAR)
{
throw new TinySQLException("SUBSTR first argument must be character");
}
else if (argIndex == 1)
{
if (tcol.type != java.sql.Types.INTEGER | tcol.intValue < 1)
{
throw new TinySQLException("SUBSTR second argument "
+ tcol.getString() + " must be integer > 0");
}
}
else if (argIndex == 2)
{
if (tcol.type != java.sql.Types.INTEGER | tcol.intValue < 1)
{
throw new TinySQLException("SUBSTR third argument "
+ tcol.getString() + " must be integer > 0");
}
size = tcol.intValue;
}
}
argIndex++;
functionArgs.addElement(tcol);
}
}
else
{
/*
* Check for SYSDATE
*/
if (name.toUpperCase().equals("SYSDATE"))
{
isConstant = true;
type = java.sql.Types.DATE;
size = 10;
notNull = true;
valueSet = true;
//Basties mote: not really SimpleDateFormat needed... - need yyyy-MM-dd
// stringValue = fmtyyyyMMdd.format(today.getTime());
stringValue = System.DateTime.Today.ToString("yyyy-MM-dd");
/*
* Check for a quoted string
*/
}
else if (UtilString.isQuotedString(name))
{
isConstant = true;
type = java.sql.Types.CHAR;
stringValue = UtilString.removeQuotes(name);
if (stringValue != (String)null)
{
size = stringValue.length();
notNull = true;
valueSet = true;
}
}
else
{
/*
* Check for a numeric constant
*/
numericType = UtilString.getValueType(name);
if (numericType == java.sql.Types.INTEGER)
{
intValue = java.lang.Integer.valueOf(name).intValue();
size = 10;
type = numericType;
isConstant = true;
notNull = true;
valueSet = true;
}
else if (numericType == java.sql.Types.FLOAT)
{
floatValue = java.lang.Float.valueOf(name).floatValue();
size = 10;
type = numericType;
isConstant = true;
notNull = true;
valueSet = true;
}
else
{
/*
* This should be a column name.
*/
columnTable = (TinySQLTable)null;
upperName = name.toUpperCase();
if (TinySQLGlobals.DEBUG)
{
java.lang.SystemJ.outJ.println("Trying to find table for " + upperName);
}
dotAt = upperName.indexOf(".");
if (dotAt > -1)
{
tableName = upperName.substring(0, dotAt);
if (tableDefs != (java.util.Hashtable <Object, Object>)null &
tableName.indexOf("->") < 0)
{
t = (java.util.Vector <Object>)tableDefs.get("TABLE_SELECT_ORDER");
tableName = UtilString.findTableAlias(tableName, t);
}
upperName = upperName.substring(dotAt + 1);
/*
* Check to see if this column name has a short equivalent.
*/
if (upperName.length() > 11)
{
longName = name;
upperName = TinySQLGlobals.getShortName(upperName);
}
columnTable = (TinySQLTable)tableDefs.get(tableName);
}
else if (tableDefs != (java.util.Hashtable <Object, Object>)null)
{
/*
* Check to see if this column name has a short equivalent.
*/
if (upperName.length() > 11)
{
longName = name;
upperName = TinySQLGlobals.getShortName(upperName);
}
/*
* Use an enumeration to go through all of the tables to find
* this column.
*/
t = (java.util.Vector <Object>)tableDefs.get("TABLE_SELECT_ORDER");
for (j = 0; j < t.size(); j++)
{
tableName = (String)t.elementAt(j);
jtbl = (TinySQLTable)tableDefs.get(tableName);
col_keys = jtbl.column_info.keys();
/*
* Check all columns.
*/
while (col_keys.hasMoreElements())
{
checkName = (String)col_keys.nextElement();
if (checkName.equals(upperName))
{
upperName = checkName;
columnTable = jtbl;
break;
}
}
if (columnTable != (TinySQLTable)null)
{
break;
}
}
}
else
{
if (TinySQLGlobals.DEBUG)
{
java.lang.SystemJ.outJ.println("No table definitions.");
}
}
if (columnTable != (TinySQLTable)null)
{
name = columnTable.table + "->" + columnTable.tableAlias
+ "." + upperName;
type = columnTable.ColType(upperName);
size = columnTable.ColSize(upperName);
decimalPlaces = columnTable.ColDec(upperName);
tableName = columnTable.table + "->" + columnTable.tableAlias;
}
}
}
}
}
