Examples with AstSelectList com.developmentontheedge.sql.model.AstSelectList used on opensource projects

Example 6 with AstSelectList

use of com.developmentontheedge.sql.model.AstSelectList in project be5 by DevelopmentOnTheEdge.

the class OrderByFilter method apply.

public void apply(AstQuery query, Map<String, String> columns) {
    AstOrderBy orderBy = new AstOrderBy();
    apply(columns, query, orderBy);
    query.children().select(AstSelect.class).forEach(AstSelect::dropOrder);
    AstSelect select;
    if (query.jjtGetNumChildren() == 1)
        select = (AstSelect) query.child(0);
    else {
        AstTableRef tableRef = new AstTableRef(new AstParenthesis(query.clone()), new AstIdentifierConstant("tmp"));
        select = new AstSelect(new AstSelectList(), new AstFrom(tableRef));
        query.replaceWith(new AstQuery(select));
    }
    select.addChild(orderBy);
}

Example 7 with AstSelectList

use of com.developmentontheedge.sql.model.AstSelectList in project be5 by DevelopmentOnTheEdge.

the class SqlServerTransformer method transformSelect.

@Override
protected void transformSelect(AstSelect select) {
    AstLimit limit = select.getLimit();
    if (limit != null) {
        if (limit.getOffset() == 0) {
            limit.setShape("TOP", null);
            select.moveToFront(limit);
        } else {
            if (select.getOrderBy() == null)
                throw new IllegalStateException("The ranking function \"ROW_NUMBER\" must have an ORDER BY clause");
            select.dropLimit();
            SimpleNode parent = select.jjtGetParent();
            int idx = parent.indexOf(select);
            AstIdentifierConstant tmp = new AstIdentifierConstant("tmp");
            AstIdentifierConstant rn = new AstIdentifierConstant("rn");
            AstSelectList list = select.getSelectList();
            AstTableRef tableRef = new AstTableRef(select);
            tableRef.setAsToken(true);
            tableRef.addChild(tmp);
            AstFrom from = new AstFrom(tableRef);
            AstWhere where = new AstWhere();
            AstBetweenPredicate between = new AstBetweenPredicate(new AstFieldReference(tmp, rn), AstNumericConstant.of(limit.getOffset()), AstNumericConstant.of(limit.getOffset() + limit.getLimit()));
            where.addChild(between);
            AstSelect newSelect = new AstSelect((AstSelectList) list.clone(), from, where);
            AstFunNode func = parserContext.getFunction("row_number").node();
            AstDerivedColumn derCol = new AstDerivedColumn(new AstWindowFunction(func, new AstWindowSpecification(select.getOrderBy())));
            select.dropOrder();
            derCol.setPrefixComma(true);
            derCol.setAsToken(true);
            derCol.addChild(rn);
            if (list.isAllColumns()) {
                for (AstTableRef tr : select.getFrom().tableRefs()) {
                    String tableName = tr.getAlias() == null ? tr.getTable() : tr.getAlias();
                    list.addChild(new AstFieldReference(new AstIdentifierConstant(tableName), new AstIdentifierConstant("*")));
                }
            }
            list.addChild(derCol);
            parent.jjtAddChild(newSelect, idx);
        }
    }
    super.transformSelect(select);
}

Example 8 with AstSelectList

use of com.developmentontheedge.sql.model.AstSelectList in project be5 by DevelopmentOnTheEdge.

the class CountApplier method transform.

public void transform(ParserContext ctx, AstStart ast) {
    AstQuery query = ast.getQuery();
    query.children().select(AstSelect.class).forEach(AstSelect::dropOrder);
    if (query.jjtGetNumChildren() > 1)
        throw new UnsupportedOperationException("UNION queries are not supported for COUNT");
    AstSelect select = query.children().select(AstSelect.class).findFirst().get();
    AstSelectList selectList = select.getSelectList();
    selectList.removeChildren();
    AstCount countFn = new AstCount();
    AstDerivedColumn countNode = new AstDerivedColumn(countFn, "CNT");
    countNode.setAsToken(true);
    selectList.addChild(countNode);
}

Example 9 with AstSelectList

use of com.developmentontheedge.sql.model.AstSelectList in project be5 by DevelopmentOnTheEdge.

the class DB2Transformer method transformSelect.

@Override
protected void transformSelect(AstSelect select) {
    AstLimit limit = select.getLimit();
    if (limit != null) {
        if (limit.getOffset() == 0)
            limit.setShape("FETCH FIRST", "ROWS ONLY");
        else {
            if (select.getOrderBy() == null)
                throw new IllegalStateException("The ranking function \"ROW_NUMBER\" must have an ORDER BY clause");
            select.dropLimit();
            SimpleNode parent = select.jjtGetParent();
            int idx = parent.indexOf(select);
            AstIdentifierConstant tmp = new AstIdentifierConstant("tmp");
            AstIdentifierConstant rn = new AstIdentifierConstant("rn");
            AstSelectList list = select.getSelectList();
            AstTableRef tableRef = new AstTableRef(select);
            tableRef.setAsToken(true);
            tableRef.addChild(tmp);
            AstFrom from = new AstFrom(tableRef);
            AstWhere where = new AstWhere();
            AstBetweenPredicate between = new AstBetweenPredicate(new AstFieldReference(tmp, rn), AstNumericConstant.of(limit.getOffset()), AstNumericConstant.of(limit.getOffset() + limit.getLimit()));
            where.addChild(between);
            AstSelect newSelect = new AstSelect((AstSelectList) list.clone(), from, where);
            AstFunNode func = parserContext.getFunction("row_number").node();
            AstDerivedColumn derCol = new AstDerivedColumn(new AstWindowFunction(func, new AstWindowSpecification(select.getOrderBy())));
            select.dropOrder();
            derCol.setPrefixComma(true);
            derCol.setAsToken(true);
            derCol.addChild(rn);
            if (list.isAllColumns()) {
                for (AstTableRef tr : select.getFrom().tableRefs()) {
                    String tableName = tr.getAlias() == null ? tr.getTable() : tr.getAlias();
                    list.addChild(new AstFieldReference(new AstIdentifierConstant(tableName), new AstIdentifierConstant("*")));
                }
            }
            list.addChild(derCol);
            parent.jjtAddChild(newSelect, idx);
        }
    }
    super.transformSelect(select);
}

Example 10 with AstSelectList

use of com.developmentontheedge.sql.model.AstSelectList in project be5 by DevelopmentOnTheEdge.

the class ColumnAdder method processSelect.

private void processSelect(AstSelect select, String tableName, String columnName, String alias) {
    AstSelectList list = select.getSelectList();
    if (list.isAllColumns())
        throw new IllegalArgumentException("Cannot modify the 'SELECT *' statement");
    String tableAlias = getTableAlias(select.getFrom(), tableName);
    AstDerivedColumn col = new AstDerivedColumn(new AstFieldReference(tableAlias, columnName), alias).setSuffixComma(true).setAsToken(true);
    list.addChild(col);
    list.moveToFront(col);
}