Package com.alibaba.druid.sql.dialect.postgresql.ast.stmt

Examples of com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGSelectQueryBlock

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        return new PGExprParser(lexer);
    }

    @Override
    public SQLSelectQuery query() throws ParserException {
        PGSelectQueryBlock queryBlock = new PGSelectQueryBlock();

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

            if (lexer.token() == Token.DISTINCT) {
                queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
                lexer.nextToken();

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

                    for (;;) {
                        SQLExpr expr = this.createExprParser().expr();
                        queryBlock.getDistinctOn().add(expr);
                        if (lexer.token() == Token.COMMA) {
                            lexer.nextToken();
                            continue;
                        } else {
                            break;
                        }
                    }
                }
            } else if (lexer.token() == Token.ALL) {
                queryBlock.setDistionOption(SQLSetQuantifier.ALL);
                lexer.nextToken();
            }

            parseSelectList(queryBlock);

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

                if (lexer.token() == Token.TEMPORARY) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMPORARY);
                } else if (lexer.token() == Token.TEMP) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMP);
                } else if (lexer.token() == Token.UNLOGGED) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.UNLOGGED);
                }

                if (lexer.token() == Token.TABLE) {
                    lexer.nextToken();
                }

                SQLExpr name = this.createExprParser().name();

                queryBlock.setInto(new SQLExprTableSource(name));
            }
        }

        parseFrom(queryBlock);

        parseWhere(queryBlock);

        parseGroupBy(queryBlock);

        if (lexer.token() == Token.WINDOW) {
            lexer.nextToken();
            PGSelectQueryBlock.WindowClause window = new PGSelectQueryBlock.WindowClause();
            window.setName(this.expr());
            accept(Token.AS);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                window.getDefinition().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }
            queryBlock.setWindow(window);
        }

        queryBlock.setOrderBy(this.createExprParser().parseOrderBy());

        if (lexer.token() == Token.LIMIT) {
            lexer.nextToken();
            if (lexer.token() == Token.ALL) {
                queryBlock.setLimit(new SQLIdentifierExpr("ALL"));
                lexer.nextToken();
            } else {
                SQLExpr limit = expr();
                queryBlock.setLimit(limit);
            }
        }

        if (lexer.token() == Token.OFFSET) {
            lexer.nextToken();
            SQLExpr offset = expr();
            queryBlock.setOffset(offset);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
              //TODO
                //throw new ParserException("expect 'ROW' or 'ROWS'");
            }
        }

        if (lexer.token() == Token.FETCH) {
            lexer.nextToken();
            PGSelectQueryBlock.FetchClause fetch = new PGSelectQueryBlock.FetchClause();

            if (lexer.token() == Token.FIRST) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.FIRST);
            } else if (lexer.token() == Token.NEXT) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.NEXT);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            SQLExpr count = expr();
            fetch.setCount(count);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }

            if (lexer.token() == Token.ONLY) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ONLY'");
            }

            queryBlock.setFetch(fetch);
        }

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

            PGSelectQueryBlock.ForClause forClause = new PGSelectQueryBlock.ForClause();

            if (lexer.token() == Token.UPDATE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.UPDATE);
            } else if (lexer.token() == Token.SHARE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.SHARE);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            accept(Token.OF);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                forClause.getOf().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }

            if (lexer.token() == Token.NOWAIT) {
                lexer.nextToken();
                forClause.setNoWait(true);
            }

            queryBlock.setForClause(forClause);
        }

        return queryRest(queryBlock);
    }
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        if (JdbcConstants.ORACLE.equals(dbType)) {
            return new OracleSelectQueryBlock();
        }

        if (JdbcConstants.POSTGRESQL.equals(dbType)) {
            return new PGSelectQueryBlock();
        }

        if (JdbcConstants.SQL_SERVER.equals(dbType) || JdbcUtils.JTDS.equals(dbType)) {
            return new SQLServerSelectQueryBlock();
        }
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                MySqlSelectQueryBlock mysqlQueryBlock = (MySqlSelectQueryBlock) queryBlock;
                if (mysqlQueryBlock.getOrderBy() != null) {
                    mysqlQueryBlock.setOrderBy(null);
                }
            } else if (queryBlock instanceof PGSelectQueryBlock) {
                PGSelectQueryBlock pgQueryBlock = (PGSelectQueryBlock) queryBlock;
                if (pgQueryBlock.getOrderBy() != null) {
                    pgQueryBlock.setOrderBy(null);
                }
            }
            return;
        }
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        this.lexer.nextToken();
    }

    @Override
    public SQLSelectQuery query() throws ParserException {
        PGSelectQueryBlock queryBlock = new PGSelectQueryBlock();

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

            if (lexer.token() == Token.DISTINCT) {
                queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
                lexer.nextToken();

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

                    for (;;) {
                        SQLExpr expr = this.createExprParser().expr();
                        queryBlock.getDistinctOn().add(expr);
                        if (lexer.token() == Token.COMMA) {
                            lexer.nextToken();
                            continue;
                        } else {
                            break;
                        }
                    }
                }
            } else if (lexer.token() == Token.ALL) {
                queryBlock.setDistionOption(SQLSetQuantifier.ALL);
                lexer.nextToken();
            }

            parseSelectList(queryBlock);

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

                if (lexer.token() == Token.TEMPORARY) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMPORARY);
                } else if (lexer.token() == Token.TEMP) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMP);
                } else if (lexer.token() == Token.UNLOGGED) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.UNLOGGED);
                }

                if (lexer.token() == Token.TABLE) {
                    lexer.nextToken();
                }

                SQLExpr name = this.createExprParser().name();

                queryBlock.setInto(new SQLExprTableSource(name));
            }
        }

        parseFrom(queryBlock);

        parseWhere(queryBlock);

        parseGroupBy(queryBlock);

        if (lexer.token() == Token.WINDOW) {
            lexer.nextToken();
            PGSelectQueryBlock.WindowClause window = new PGSelectQueryBlock.WindowClause();
            window.setName(this.expr());
            accept(Token.AS);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                window.getDefinition().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }
            queryBlock.setWindow(window);
        }

        queryBlock.setOrderBy(this.createExprParser().parseOrderBy());

        if (lexer.token() == Token.LIMIT) {
            lexer.nextToken();
            if (lexer.token() == Token.ALL) {
                queryBlock.setLimit(new SQLIdentifierExpr("ALL"));
                lexer.nextToken();
            } else {
                SQLExpr limit = expr();
                queryBlock.setLimit(limit);
            }
        }

        if (lexer.token() == Token.OFFSET) {
            lexer.nextToken();
            SQLExpr offset = expr();
            queryBlock.setOffset(offset);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }
        }

        if (lexer.token() == Token.FETCH) {
            lexer.nextToken();
            PGSelectQueryBlock.FetchClause fetch = new PGSelectQueryBlock.FetchClause();

            if (lexer.token() == Token.FIRST) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.FIRST);
            } else if (lexer.token() == Token.NEXT) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.NEXT);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            SQLExpr count = expr();
            fetch.setCount(count);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }

            if (lexer.token() == Token.ONLY) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ONLY'");
            }

            queryBlock.setFetch(fetch);
        }

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

            PGSelectQueryBlock.ForClause forClause = new PGSelectQueryBlock.ForClause();

            if (lexer.token() == Token.UPDATE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.UPDATE);
            } else if (lexer.token() == Token.SHARE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.SHARE);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            accept(Token.OF);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                forClause.getOf().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }

            if (lexer.token() == Token.NOWAIT) {
                lexer.nextToken();
                forClause.setNoWait(true);
            }

            queryBlock.setForClause(forClause);
        }

        return queryRest(queryBlock);
    }
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        return new PGExprParser(lexer);
    }

    @Override
    public SQLSelectQuery query() {
        PGSelectQueryBlock queryBlock = new PGSelectQueryBlock();

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

            if (lexer.token() == Token.DISTINCT) {
                queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
                lexer.nextToken();

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

                    for (;;) {
                        SQLExpr expr = this.createExprParser().expr();
                        queryBlock.getDistinctOn().add(expr);
                        if (lexer.token() == Token.COMMA) {
                            lexer.nextToken();
                            continue;
                        } else {
                            break;
                        }
                    }
                }
            } else if (lexer.token() == Token.ALL) {
                queryBlock.setDistionOption(SQLSetQuantifier.ALL);
                lexer.nextToken();
            }

            parseSelectList(queryBlock);

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

                if (lexer.token() == Token.TEMPORARY) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMPORARY);
                } else if (lexer.token() == Token.TEMP) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMP);
                } else if (lexer.token() == Token.UNLOGGED) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.UNLOGGED);
                }

                if (lexer.token() == Token.TABLE) {
                    lexer.nextToken();
                }

                SQLExpr name = this.createExprParser().name();

                queryBlock.setInto(new SQLExprTableSource(name));
            }
        }

        parseFrom(queryBlock);

        parseWhere(queryBlock);

        parseGroupBy(queryBlock);

        if (lexer.token() == Token.WINDOW) {
            lexer.nextToken();
            PGSelectQueryBlock.WindowClause window = new PGSelectQueryBlock.WindowClause();
            window.setName(this.expr());
            accept(Token.AS);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                window.getDefinition().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }
            queryBlock.setWindow(window);
        }

        queryBlock.setOrderBy(this.createExprParser().parseOrderBy());

        for (;;) {
            if (lexer.token() == Token.LIMIT) {
                lexer.nextToken();
                if (lexer.token() == Token.ALL) {
                    queryBlock.setLimit(new SQLIdentifierExpr("ALL"));
                    lexer.nextToken();
                } else {
                    SQLExpr limit = expr();
                    queryBlock.setLimit(limit);
                }
            } else if (lexer.token() == Token.OFFSET) {
                lexer.nextToken();
                SQLExpr offset = expr();
                queryBlock.setOffset(offset);

                if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                    lexer.nextToken();
                }
            } else {
                break;
            }
        }

        if (lexer.token() == Token.FETCH) {
            lexer.nextToken();
            PGSelectQueryBlock.FetchClause fetch = new PGSelectQueryBlock.FetchClause();

            if (lexer.token() == Token.FIRST) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.FIRST);
            } else if (lexer.token() == Token.NEXT) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.NEXT);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            SQLExpr count = expr();
            fetch.setCount(count);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }

            if (lexer.token() == Token.ONLY) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ONLY'");
            }

            queryBlock.setFetch(fetch);
        }

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

            PGSelectQueryBlock.ForClause forClause = new PGSelectQueryBlock.ForClause();

            if (lexer.token() == Token.UPDATE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.UPDATE);
                lexer.nextToken();
            } else if (lexer.token() == Token.SHARE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.SHARE);
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            if (lexer.token() == Token.OF) {
                for (;;) {
                    SQLExpr expr = this.createExprParser().expr();
                    forClause.getOf().add(expr);
                    if (lexer.token() == Token.COMMA) {
                        lexer.nextToken();
                        continue;
                    } else {
                        break;
                    }
                }
            }

            if (lexer.token() == Token.NOWAIT) {
                lexer.nextToken();
                forClause.setNoWait(true);
            }

            queryBlock.setForClause(forClause);
        }

        return queryRest(queryBlock);
    }
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        this.lexer.nextToken();
    }

    @Override
    public SQLSelectQuery query() throws ParserException {
        PGSelectQueryBlock queryBlock = new PGSelectQueryBlock();

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

            if (lexer.token() == Token.DISTINCT) {
                queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
                lexer.nextToken();

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

                    for (;;) {
                        SQLExpr expr = this.createExprParser().expr();
                        queryBlock.getDistinctOn().add(expr);
                        if (lexer.token() == Token.COMMA) {
                            lexer.nextToken();
                            continue;
                        } else {
                            break;
                        }
                    }
                }
            } else if (lexer.token() == Token.ALL) {
                queryBlock.setDistionOption(SQLSetQuantifier.ALL);
                lexer.nextToken();
            }

            parseSelectList(queryBlock);

            if (lexer.token() == Token.INTO) {
                IntoClause into = new IntoClause();
                lexer.nextToken();

                if (lexer.token() == Token.TEMPORARY) {
                    lexer.nextToken();
                    into.setOption(IntoClause.Option.TEMPORARY);
                } else if (lexer.token() == Token.TEMP) {
                    lexer.nextToken();
                    into.setOption(IntoClause.Option.TEMP);
                } else if (lexer.token() == Token.UNLOGGED) {
                    lexer.nextToken();
                    into.setOption(IntoClause.Option.UNLOGGED);
                }

                if (lexer.token() == Token.TABLE) {
                    lexer.nextToken();
                }

                SQLExpr name = this.createExprParser().name();
                into.setTable(name);

                queryBlock.setInto(into);
            }
        }

        parseFrom(queryBlock);

        parseWhere(queryBlock);

        parseGroupBy(queryBlock);

        if (lexer.token() == Token.WINDOW) {
            lexer.nextToken();
            PGSelectQueryBlock.WindowClause window = new PGSelectQueryBlock.WindowClause();
            window.setName(this.expr());
            accept(Token.AS);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                window.getDefinition().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }
            queryBlock.setWindow(window);
        }

        queryBlock.setOrderBy(this.createExprParser().parseOrderBy());

        if (lexer.token() == Token.LIMIT) {
            lexer.nextToken();
            if (lexer.token() == Token.ALL) {
                queryBlock.setLimit(new SQLIdentifierExpr("ALL"));
                lexer.nextToken();
            } else {
                SQLExpr limit = expr();
                queryBlock.setLimit(limit);
            }
        }

        if (lexer.token() == Token.OFFSET) {
            lexer.nextToken();
            SQLExpr offset = expr();
            queryBlock.setOffset(offset);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }
        }

        if (lexer.token() == Token.FETCH) {
            lexer.nextToken();
            PGSelectQueryBlock.FetchClause fetch = new PGSelectQueryBlock.FetchClause();

            if (lexer.token() == Token.FIRST) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.FIRST);
            } else if (lexer.token() == Token.NEXT) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.NEXT);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            SQLExpr count = expr();
            fetch.setCount(count);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }

            if (lexer.token() == Token.ONLY) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ONLY'");
            }

            queryBlock.setFetch(fetch);
        }

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

            PGSelectQueryBlock.ForClause forClause = new PGSelectQueryBlock.ForClause();

            if (lexer.token() == Token.UPDATE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.UPDATE);
            } else if (lexer.token() == Token.SHARE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.SHARE);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            accept(Token.OF);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                forClause.getOf().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }

            if (lexer.token() == Token.NOWAIT) {
                lexer.nextToken();
                forClause.setNoWait(true);
            }

            queryBlock.setForClause(forClause);
        }

        return queryRest(queryBlock);
    }
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        if (JdbcConstants.ORACLE.equals(dbType)) {
            return new OracleSelectQueryBlock();
        }

        if (JdbcConstants.POSTGRESQL.equals(dbType)) {
            return new PGSelectQueryBlock();
        }

        if (JdbcConstants.SQL_SERVER.equals(dbType)) {
            return new SQLServerSelectQueryBlock();
        }
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                MySqlSelectQueryBlock mysqlQueryBlock = (MySqlSelectQueryBlock) queryBlock;
                if (mysqlQueryBlock.getOrderBy() != null) {
                    mysqlQueryBlock.setOrderBy(null);
                }
            } else if (queryBlock instanceof PGSelectQueryBlock) {
                PGSelectQueryBlock pgQueryBlock = (PGSelectQueryBlock) queryBlock;
                if (pgQueryBlock.getOrderBy() != null) {
                    pgQueryBlock.setOrderBy(null);
                }
            }
            return;
        }
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        return new PGExprParser(lexer);
    }

    @Override
    public SQLSelectQuery query() throws ParserException {
        PGSelectQueryBlock queryBlock = new PGSelectQueryBlock();

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

            if (lexer.token() == Token.DISTINCT) {
                queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
                lexer.nextToken();

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

                    for (;;) {
                        SQLExpr expr = this.createExprParser().expr();
                        queryBlock.getDistinctOn().add(expr);
                        if (lexer.token() == Token.COMMA) {
                            lexer.nextToken();
                            continue;
                        } else {
                            break;
                        }
                    }
                }
            } else if (lexer.token() == Token.ALL) {
                queryBlock.setDistionOption(SQLSetQuantifier.ALL);
                lexer.nextToken();
            }

            parseSelectList(queryBlock);

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

                if (lexer.token() == Token.TEMPORARY) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMPORARY);
                } else if (lexer.token() == Token.TEMP) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMP);
                } else if (lexer.token() == Token.UNLOGGED) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.UNLOGGED);
                }

                if (lexer.token() == Token.TABLE) {
                    lexer.nextToken();
                }

                SQLExpr name = this.createExprParser().name();

                queryBlock.setInto(new SQLExprTableSource(name));
            }
        }

        parseFrom(queryBlock);

        parseWhere(queryBlock);

        parseGroupBy(queryBlock);

        if (lexer.token() == Token.WINDOW) {
            lexer.nextToken();
            PGSelectQueryBlock.WindowClause window = new PGSelectQueryBlock.WindowClause();
            window.setName(this.expr());
            accept(Token.AS);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                window.getDefinition().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }
            queryBlock.setWindow(window);
        }

        queryBlock.setOrderBy(this.createExprParser().parseOrderBy());

        if (lexer.token() == Token.LIMIT) {
            lexer.nextToken();
            if (lexer.token() == Token.ALL) {
                queryBlock.setLimit(new SQLIdentifierExpr("ALL"));
                lexer.nextToken();
            } else {
                SQLExpr limit = expr();
                queryBlock.setLimit(limit);
            }
        }

        if (lexer.token() == Token.OFFSET) {
            lexer.nextToken();
            SQLExpr offset = expr();
            queryBlock.setOffset(offset);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
              //TODO
                //throw new ParserException("expect 'ROW' or 'ROWS'");
            }
        }

        if (lexer.token() == Token.FETCH) {
            lexer.nextToken();
            PGSelectQueryBlock.FetchClause fetch = new PGSelectQueryBlock.FetchClause();

            if (lexer.token() == Token.FIRST) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.FIRST);
            } else if (lexer.token() == Token.NEXT) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.NEXT);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            SQLExpr count = expr();
            fetch.setCount(count);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }

            if (lexer.token() == Token.ONLY) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ONLY'");
            }

            queryBlock.setFetch(fetch);
        }

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

            PGSelectQueryBlock.ForClause forClause = new PGSelectQueryBlock.ForClause();

            if (lexer.token() == Token.UPDATE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.UPDATE);
            } else if (lexer.token() == Token.SHARE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.SHARE);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            accept(Token.OF);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                forClause.getOf().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }

            if (lexer.token() == Token.NOWAIT) {
                lexer.nextToken();
                forClause.setNoWait(true);
            }

            queryBlock.setForClause(forClause);
        }

        return queryRest(queryBlock);
    }
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        return new PGExprParser(lexer);
    }

    @Override
    public SQLSelectQuery query() {
        PGSelectQueryBlock queryBlock = new PGSelectQueryBlock();

        if (lexer.token() == Token.SELECT) {
            lexer.nextToken();
           
            if (lexer.token() == Token.COMMENT) {
                lexer.nextToken();
            }

            if (lexer.token() == Token.DISTINCT) {
                queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
                lexer.nextToken();

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

                    for (;;) {
                        SQLExpr expr = this.createExprParser().expr();
                        queryBlock.getDistinctOn().add(expr);
                        if (lexer.token() == Token.COMMA) {
                            lexer.nextToken();
                            continue;
                        } else {
                            break;
                        }
                    }
                }
            } else if (lexer.token() == Token.ALL) {
                queryBlock.setDistionOption(SQLSetQuantifier.ALL);
                lexer.nextToken();
            }

            parseSelectList(queryBlock);

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

                if (lexer.token() == Token.TEMPORARY) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMPORARY);
                } else if (lexer.token() == Token.TEMP) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.TEMP);
                } else if (lexer.token() == Token.UNLOGGED) {
                    lexer.nextToken();
                    queryBlock.setIntoOption(IntoOption.UNLOGGED);
                }

                if (lexer.token() == Token.TABLE) {
                    lexer.nextToken();
                }

                SQLExpr name = this.createExprParser().name();

                queryBlock.setInto(new SQLExprTableSource(name));
            }
        }

        parseFrom(queryBlock);

        parseWhere(queryBlock);

        parseGroupBy(queryBlock);

        if (lexer.token() == Token.WINDOW) {
            lexer.nextToken();
            PGSelectQueryBlock.WindowClause window = new PGSelectQueryBlock.WindowClause();
            window.setName(this.expr());
            accept(Token.AS);

            for (;;) {
                SQLExpr expr = this.createExprParser().expr();
                window.getDefinition().add(expr);
                if (lexer.token() == Token.COMMA) {
                    lexer.nextToken();
                    continue;
                } else {
                    break;
                }
            }
            queryBlock.setWindow(window);
        }

        queryBlock.setOrderBy(this.createExprParser().parseOrderBy());

        for (;;) {
            if (lexer.token() == Token.LIMIT) {
                lexer.nextToken();
                if (lexer.token() == Token.ALL) {
                    queryBlock.setLimit(new SQLIdentifierExpr("ALL"));
                    lexer.nextToken();
                } else {
                    SQLExpr limit = expr();
                    queryBlock.setLimit(limit);
                }
            } else if (lexer.token() == Token.OFFSET) {
                lexer.nextToken();
                SQLExpr offset = expr();
                queryBlock.setOffset(offset);

                if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                    lexer.nextToken();
                }
            } else {
                break;
            }
        }

        if (lexer.token() == Token.FETCH) {
            lexer.nextToken();
            PGSelectQueryBlock.FetchClause fetch = new PGSelectQueryBlock.FetchClause();

            if (lexer.token() == Token.FIRST) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.FIRST);
            } else if (lexer.token() == Token.NEXT) {
                fetch.setOption(PGSelectQueryBlock.FetchClause.Option.NEXT);
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            SQLExpr count = expr();
            fetch.setCount(count);

            if (lexer.token() == Token.ROW || lexer.token() == Token.ROWS) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ROW' or 'ROWS'");
            }

            if (lexer.token() == Token.ONLY) {
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'ONLY'");
            }

            queryBlock.setFetch(fetch);
        }

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

            PGSelectQueryBlock.ForClause forClause = new PGSelectQueryBlock.ForClause();

            if (lexer.token() == Token.UPDATE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.UPDATE);
                lexer.nextToken();
            } else if (lexer.token() == Token.SHARE) {
                forClause.setOption(PGSelectQueryBlock.ForClause.Option.SHARE);
                lexer.nextToken();
            } else {
                throw new ParserException("expect 'FIRST' or 'NEXT'");
            }

            if (lexer.token() == Token.OF) {
                for (;;) {
                    SQLExpr expr = this.createExprParser().expr();
                    forClause.getOf().add(expr);
                    if (lexer.token() == Token.COMMA) {
                        lexer.nextToken();
                        continue;
                    } else {
                        break;
                    }
                }
            }

            if (lexer.token() == Token.NOWAIT) {
                lexer.nextToken();
                forClause.setNoWait(true);
            }

            queryBlock.setForClause(forClause);
        }

        return queryRest(queryBlock);
    }
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Related Classes of com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGSelectQueryBlock

  • com.alibaba.druid.sql.dialect.postgresql.parser.PGSelectParser
  • com.alibaba.druid.sql.dialect.postgresql.visitor.PGASTVisitor
  • com.alibaba.druid.sql.dialect.postgresql.visitor.PGOutputVisitor
  • com.alibaba.druid.sql.PagerUtils
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