Package org.apache.derby.client.am

Examples of org.apache.derby.client.am.ColumnMetaData

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            // the sqlcagrp is most likely null for insert/update/deletes.  if it is null, then we can
            // peek ahead for the column number which most likely will be 0.  if it is 0, then we will
            // not new up a ColumnMetaData, and we can skip the rest of the bytes in sqldard.
            // if sqlcargrp is not null, (most likely for select's) then we will not peek ahead for the
            // column number since it will never be 0 in a select case.
            ColumnMetaData columnMetaData = null;
            NetSqlca netSqlca = null;
            boolean nullSqlca = peekForNullSqlcagrp();
            if (nullSqlca && peekNumOfColumns() == 0) {
                netSqlca = parseSQLDARD(columnMetaData, true); // true means to skip the rest of SQLDARD bytes
            } else {
                columnMetaData = new ColumnMetaData(netAgent_.logWriter_);
                netSqlca = parseSQLDARD(columnMetaData, false); // false means do not skip SQLDARD bytes.
            }

            statement.completePrepareDescribeOutput(columnMetaData,
                    netSqlca);
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                                     int metaDataType) // 0 is output, else input
            throws DisconnectException {
        int peekCP = parseTypdefsOrMgrlvlovrs();

        if (peekCP == CodePoint.SQLDARD) {
            ColumnMetaData columnMetaData = null;

            if (columnMetaData == null) {
                columnMetaData = new ColumnMetaData(netAgent_.logWriter_);
            }

            NetSqlca netSqlca = parseSQLDARD(columnMetaData, false);  // false means do not skip SQLDARD bytes
            if (columnMetaData.columns_ == 0) {
                columnMetaData = null;
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            netSqlca = parseSQLCARD(null);
            peekCP = parseTypdefsOrMgrlvlovrs();
        }

        // the SQLCINRD contains SQLDA like information for the result set.
        ColumnMetaData resultSetMetaData = null;
        if (peekCP == CodePoint.SQLCINRD) {
            resultSetMetaData = parseSQLCINRD();
            peekCP = parseTypdefsOrMgrlvlovrs();
        }
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        if (peekCP != CodePoint.QRYDSC) {

            peekCP = parseTypdefsOrMgrlvlovrs();

            if (peekCP == CodePoint.SQLDARD) {
                ColumnMetaData columnMetaData = new ColumnMetaData(netAgent_.logWriter_);
                NetSqlca netSqlca = parseSQLDARD(columnMetaData, false);  // false means do not skip SQLDARD bytes

                //For java stored procedure, we got the resultSetMetaData from server,
                //Do we need to save the resultSetMetaData and propagate netSqlca?
                //The following statement are doing the both, but it do more than
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    protected ColumnMetaData parseSQLCINRD() throws DisconnectException {
        parseLengthAndMatchCodePoint(CodePoint.SQLCINRD);
        int ddmLength = getDdmLength();
        ensureBLayerDataInBuffer(ddmLength);
        ColumnMetaData cm = parseSQLCINRDarray();
        adjustLengths(getDdmLength());
        return cm;
    }
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    // SQL Result Set Column Information Reply Data (SQLCINRD) is a byte string
    // that specifies information about columns for a result set returned as
    // reply data in the response to an EXCSQLSTT command that invodes a stored
    // procedure
    ColumnMetaData parseSQLCINRDarray() throws DisconnectException {
        ColumnMetaData columnMetaData = new ColumnMetaData(netAgent_.logWriter_);

        parseSQLDHROW(columnMetaData);

        // possibly change initializeCache to not new up arrays if
        // parseSQLNUMROW returns 0
        columnMetaData.initializeCache(parseFastSQLNUMROW());

        // is this correct for 0 SQLNUMROW,
        // does rest of code expect a null ColumnMetaData object
        // or does rest of code expect an non null object
        // with columns_ set to 0
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            // the sqlcagrp is most likely null for insert/update/deletes.  if it is null, then we can
            // peek ahead for the column number which most likely will be 0.  if it is 0, then we will
            // not new up a ColumnMetaData, and we can skip the rest of the bytes in sqldard.
            // if sqlcargrp is not null, (most likely for select's) then we will not peek ahead for the
            // column number since it will never be 0 in a select case.
            ColumnMetaData columnMetaData = null;
            NetSqlca netSqlca = null;
            boolean nullSqlca = peekForNullSqlcagrp();
            if (nullSqlca && peekNumOfColumns() == 0) {
                netSqlca = parseSQLDARD(columnMetaData, true); // true means to skip the rest of SQLDARD bytes
            } else {
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                                     int metaDataType) // 0 is output, else input
            throws DisconnectException {
        int peekCP = parseTypdefsOrMgrlvlovrs();

        if (peekCP == CodePoint.SQLDARD) {
            ColumnMetaData columnMetaData = null;

            if (columnMetaData == null) {
                columnMetaData = ClientDriver.getFactory().newColumnMetaData(netAgent_.logWriter_);
            }
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            netSqlca = parseSQLCARD(null);
            peekCP = parseTypdefsOrMgrlvlovrs();
        }

        // the SQLCINRD contains SQLDA like information for the result set.
        ColumnMetaData resultSetMetaData = null;
        if (peekCP == CodePoint.SQLCINRD) {
            resultSetMetaData = parseSQLCINRD();
            peekCP = parseTypdefsOrMgrlvlovrs();
        }
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        if (peekCP != CodePoint.QRYDSC) {

            peekCP = parseTypdefsOrMgrlvlovrs();

            if (peekCP == CodePoint.SQLDARD) {
                ColumnMetaData columnMetaData = ClientDriver.getFactory().newColumnMetaData(netAgent_.logWriter_);
                NetSqlca netSqlca = parseSQLDARD(columnMetaData, false);  // false means do not skip SQLDARD bytes

                //For java stored procedure, we got the resultSetMetaData from server,
                //Do we need to save the resultSetMetaData and propagate netSqlca?
                //The following statement are doing the both, but it do more than
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Related Classes of org.apache.derby.client.am.ColumnMetaData

  • org.apache.derby.client.net.ClientJDBCObjectFactoryImpl
  • org.apache.derby.client.net.NetStatementReply
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