Examples of org.datanucleus.store.mapped.expression.QueryExpression.selectScalarExpression()

Package org.datanucleus.store.mapped.expression

Class org.datanucleus.store.mapped.expression.QueryExpression

Examples of org.datanucleus.store.mapped.expression.QueryExpression.selectScalarExpression()

org.datanucleus.store.mapped.expression.QueryExpression.selectScalarExpression()
select an expression; eg: "'Text' as alias" @param expr The expression to add to the select statement @return The index of the expression in the select


        // Select COUNT(*)
        JavaTypeMapping m = storeMgr.getMappingManager().getMapping(String.class);
        StringLiteral lit = (StringLiteral)m.newLiteral(stmt, "COUNT(*)");
        lit.generateStatementWithoutQuotes();
        stmt.selectScalarExpression(lit);


        // TODO This needs to restrict the discriminator also where it is present (see sizeStmt)


        return stmt;
    }

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            discrimTableExpr = stmt.getTableExpression(candidateTableIdentifier);


            if (hasDiscriminator && selectDiscriminator)
            {
                // Select the discriminator column so we can process the ResultSet
                stmt.selectScalarExpression(candidateTable.getDiscriminatorMapping(true).newScalarExpression(stmt, candidateTableExpression));
            }
        }
        else
        {
            // Select the candidate table

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        // Select COUNT(*)
        JavaTypeMapping m = storeMgr.getMappingManager().getMapping(String.class);
        StringLiteral lit = (StringLiteral)m.newLiteral(stmt, "COUNT(*)");
        lit.generateStatementWithoutQuotes();
        stmt.selectScalarExpression(lit);


        return stmt;
    }


    /**

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        // Select COUNT(*)
        JavaTypeMapping m = storeMgr.getMappingManager().getMapping(String.class);
        StringLiteral lit = (StringLiteral)m.newLiteral(stmt, "COUNT(*)");
        lit.generateStatementWithoutQuotes();
        stmt.selectScalarExpression(lit);


        return stmt;
    }
}

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