Package com.alibaba.druid.sql.ast.statement

Examples of com.alibaba.druid.sql.ast.statement.SQLSelectQuery

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    }

    public boolean visit(SQLSubqueryTableSource x) {
        x.getSelect().accept(this);

        SQLSelectQuery query = x.getSelect().getQuery();

        Map<String, String> aliasMap = getAliasMap();
        if (aliasMap != null && x.getAlias() != null) {
            aliasMap.put(x.getAlias(), null);
            subQueryMap.put(x.getAlias(), query);
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    }

    public boolean visit(SQLSubqueryTableSource x) {
        x.getSelect().accept(this);

        SQLSelectQuery query = x.getSelect().getQuery();

        Map<String, String> aliasMap = getAliasMap();
        if (aliasMap != null && x.getAlias() != null) {
            aliasMap.put(x.getAlias(), null);
            subQueryMap.put(x.getAlias(), query);
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        return isSimpleCountTableSource(subQuery.getSelect());
    }

    public static boolean isSimpleCountTableSource(SQLSelect select) {
        SQLSelectQuery query = select.getQuery();

        if (query instanceof SQLSelectQueryBlock) {
            SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) query;

            boolean allawTrueWhere = false;
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            }

            if (queryBlock.getSelectList().size() == 1
                && queryBlock.getSelectList().get(0).getExpr() instanceof SQLAllColumnExpr) {
                if (from instanceof SQLSubqueryTableSource) {
                    SQLSelectQuery subQuery = ((SQLSubqueryTableSource) from).getSelect().getQuery();
                    if (queryBlockFromIsNull(subQuery)) {
                        return true;
                    }
                }
            }
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    }

    public boolean visit(SQLSubqueryTableSource x) {
        x.getSelect().accept(this);

        SQLSelectQuery query = x.getSelect().getQuery();

        Map<String, String> aliasMap = getAliasMap();
        if (aliasMap != null) {
            if (x.getAlias() != null) {
                aliasMap.put(x.getAlias(), null);
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    public SQLSelectQuery query() throws ParserException {
        if (lexer.token() == Token.LPAREN) {
            lexer.nextToken();

            SQLSelectQuery select = query();
            accept(Token.RPAREN);

            return queryRest(select);
        }
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        return isSimpleCountTableSource(subQuery.getSelect());
    }

    public static boolean isSimpleCountTableSource(SQLSelect select) {
        SQLSelectQuery query = select.getQuery();

        if (query instanceof SQLSelectQueryBlock) {
            SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) query;

            boolean allawTrueWhere = false;
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            }

            if (queryBlock.getSelectList().size() == 1
                && queryBlock.getSelectList().get(0).getExpr() instanceof SQLAllColumnExpr) {
                if (from instanceof SQLSubqueryTableSource) {
                    SQLSelectQuery subQuery = ((SQLSubqueryTableSource) from).getSelect().getQuery();
                    if (queryBlockFromIsNull(subQuery)) {
                        return true;
                    }
                }
            }
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            if (lexer.token() == Token.ALL) {
                union.setOperator(SQLUnionOperator.UNION_ALL);
                lexer.nextToken();
            }

            SQLSelectQuery right = this.query();
            union.setRight(right);

            return union;
        }

        if (lexer.token() == Token.INTERSECT) {
            lexer.nextToken();

            SQLUnionQuery union = new SQLUnionQuery();
            union.setLeft(selectQuery);

            union.setOperator(SQLUnionOperator.INTERSECT);

            SQLSelectQuery right = this.query();
            union.setRight(right);

            return union;
        }

        if (lexer.token() == Token.MINUS) {
            lexer.nextToken();

            SQLUnionQuery union = new SQLUnionQuery();
            union.setLeft(selectQuery);

            union.setOperator(SQLUnionOperator.MINUS);

            SQLSelectQuery right = this.query();
            union.setRight(right);

            return union;
        }
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    public SQLSelectQuery query() throws ParserException {
        if (lexer.token() == Token.LPAREN) {
            lexer.nextToken();

            SQLSelectQuery select = query();
            accept(Token.RPAREN);

            return queryRest(select);
        }
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