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

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

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    public SQLSelectQuery query() {
        if (lexer.token() == (Token.LPAREN)) {
            lexer.nextToken();

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

            return queryRest(select);
        }
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            if (lexer.token() == (Token.ALL)) {
                union.setOperator(SQLUnionOperator.UNION_ALL);
                lexer.nextToken();
            }

            SQLSelectQuery right = query();

            union.setRight(right);

            return queryRest(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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    @Override
    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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        SQLStatement stmt = stmtList.get(0);
        if (!(stmt instanceof SQLSelectStatement)) {
            return;
        }

        SQLSelectQuery query = ((SQLSelectStatement) stmt).getSelect().getQuery();
        if (query instanceof SQLSelectQueryBlock) {
            if (((SQLSelectQueryBlock) query).getFrom() == null) {
                LOG.error("invalid oracle validationQuery. " + validationQuery + ", may should be : " + validationQuery
                          + " FROM DUAL");
            }
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        SQLStatement stmt = stmtList.get(0);
        if (!(stmt instanceof SQLSelectStatement)) {
            return;
        }

        SQLSelectQuery query = ((SQLSelectStatement) stmt).getSelect().getQuery();
        if (query instanceof SQLSelectQueryBlock) {
            if (((SQLSelectQueryBlock) query).getFrom() == null) {
                LOG.error("invalid db2 validationQuery. " + validationQuery + ", may should be : " + validationQuery
                          + " FROM SYSDUMMY");
            }
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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() {
        if (lexer.token() == (Token.LPAREN)) {
            lexer.nextToken();

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

            return queryRest(select);
        }
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            } else if (lexer.token() == (Token.DISTINCT)) {
                union.setOperator(SQLUnionOperator.DISTINCT);
                lexer.nextToken();
            }

            SQLSelectQuery right = query();

            union.setRight(right);

            return queryRest(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 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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        List<SQLSelectQueryBlock> groupList = new ArrayList<SQLSelectQueryBlock>();
        Stack<SQLSelectQuery> stack = new Stack<SQLSelectQuery>();

        stack.push(x);
        do {
            SQLSelectQuery query = stack.pop();
            if (query instanceof SQLSelectQueryBlock) {
                groupList.add((SQLSelectQueryBlock) query);
            } else if (query instanceof SQLUnionQuery) {
                SQLUnionQuery unionQuery = (SQLUnionQuery) query;
                stack.push(unionQuery.getLeft());
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  • com.alibaba.druid.sql.dialect.mysql.parser.MySqlSelectParser
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  • com.alibaba.druid.sql.visitor.SchemaStatVisitor
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