Examples of com.foundationdb.sql.parser.ResultColumn

com.foundationdb.sql.parser.ResultColumn

A ResultColumn represents a result column in a SELECT, INSERT, or UPDATE statement. In a SELECT statement, the result column just represents an expression in a row being returned to the client. For INSERT and UPDATE statements, the result column represents an column in a stored table. So, a ResultColumn has to be bound differently depending on the type of statement it appears in.

The type of the ResultColumn can differ from its underlying expression, for example in certain joins the ResultColumn can be nullable even if its underlying column is not. In an INSERT or UPDATE the ResultColumn will represent the type of the column in the table, the type of the underlying expresion will be the type of the source of the value to be insert or updated. The method columnTypeAndLengthMatch() can be used to detect when normalization is required between the expression and the tyoe of ResultColumn. This class does not implement any type normalization (conversion), this is typically handled by a NormalizeResultSetNode.

        Table table = builder.akibanInformationSchema().getTable(schemaName, tableName);
        ResultColumnList resultColumns = null;
        if(createTable != null)
            resultColumns = createTable.getResultColumns();
        String newColumnName;
        ResultColumn resultColumn;
        if(resultColumns != null && resultColumns.size() > descriptors.size())
            throw new InvalidCreateAsException("More columns names in create than in select query");
        int colpos = 0;
        for (DataTypeDescriptor descriptor : descriptors) {
            if ((resultColumns != null) && (resultColumns.size() > colpos)){
                    resultColumn = resultColumns.getResultColumn(colpos+ 1);
                    if(resultColumn != null) {
                        newColumnName = resultColumn.getName();
                    }else {
                        newColumnName = columnNames.get(colpos);
                     }


            } else {

Examples of com.foundationdb.sql.parser.ResultColumn

Related Classes of com.foundationdb.sql.parser.ResultColumn