Examples with MySqlHelpStatement com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlHelpStatement used on opensource projects

Example 1 with MySqlHelpStatement

use of com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlHelpStatement in project druid by alibaba.

the class MySqlStatementParser method parseStatementListDialect.

public boolean parseStatementListDialect(List<SQLStatement> statementList) {
    if (lexer.token() == Token.KILL) {
        SQLStatement stmt = parseKill();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("PREPARE")) {
        MySqlPrepareStatement stmt = parsePrepare();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("EXECUTE")) {
        MySqlExecuteStatement stmt = parseExecute();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("DEALLOCATE")) {
        MysqlDeallocatePrepareStatement stmt = parseDeallocatePrepare();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("LOAD")) {
        SQLStatement stmt = parseLoad();
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.REPLACE) {
        MySqlReplaceStatement stmt = parseReplicate();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("START")) {
        SQLStartTransactionStatement stmt = parseStart();
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.SHOW) {
        SQLStatement stmt = parseShow();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals(BINLOG)) {
        SQLStatement stmt = parseBinlog();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals(RESET)) {
        SQLStatement stmt = parseReset();
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.ANALYZE) {
        SQLStatement stmt = parseAnalyze();
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.OPTIMIZE) {
        SQLStatement stmt = parseOptimize();
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("HELP")) {
        lexer.nextToken();
        MySqlHelpStatement stmt = new MySqlHelpStatement();
        stmt.setContent(this.exprParser.primary());
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.DESC || identifierEquals(DESCRIBE)) {
        SQLStatement stmt = parseDescribe();
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.LOCK) {
        lexer.nextToken();
        String val = lexer.stringVal();
        boolean isLockTables = TABLES.equalsIgnoreCase(val) && lexer.token() == Token.IDENTIFIER;
        boolean isLockTable = "TABLE".equalsIgnoreCase(val) && lexer.token() == Token.TABLE;
        if (isLockTables || isLockTable) {
            lexer.nextToken();
        } else {
            setErrorEndPos(lexer.pos());
            throw new ParserException("syntax error, expect TABLES or TABLE, actual " + lexer.token());
        }
        MySqlLockTableStatement stmt = new MySqlLockTableStatement();
        stmt.setTableSource(this.exprParser.name());
        if (identifierEquals(READ)) {
            lexer.nextToken();
            if (identifierEquals(LOCAL)) {
                lexer.nextToken();
                stmt.setLockType(LockType.READ_LOCAL);
            } else {
                stmt.setLockType(LockType.READ);
            }
        } else if (identifierEquals(WRITE)) {
            stmt.setLockType(LockType.WRITE);
        } else if (identifierEquals(LOW_PRIORITY)) {
            lexer.nextToken();
            acceptIdentifier(WRITE);
            stmt.setLockType(LockType.LOW_PRIORITY_WRITE);
        } else {
            throw new ParserException("syntax error, expect READ or WRITE, actual " + lexer.token());
        }
        if (lexer.token() == Token.HINT) {
            stmt.setHints(this.exprParser.parseHints());
        }
        statementList.add(stmt);
        return true;
    }
    if (identifierEquals("UNLOCK")) {
        lexer.nextToken();
        String val = lexer.stringVal();
        boolean isUnLockTables = TABLES.equalsIgnoreCase(val) && lexer.token() == Token.IDENTIFIER;
        boolean isUnLockTable = "TABLE".equalsIgnoreCase(val) && lexer.token() == Token.TABLE;
        statementList.add(new MySqlUnlockTablesStatement());
        if (isUnLockTables || isUnLockTable) {
            lexer.nextToken();
        } else {
            setErrorEndPos(lexer.pos());
            throw new ParserException("syntax error, expect TABLES or TABLE, actual " + lexer.token());
        }
        return true;
    }
    if (lexer.token() == Token.HINT) {
        List<SQLCommentHint> hints = this.exprParser.parseHints();
        boolean tddlSelectHints = false;
        if (hints.size() == 1 && statementList.size() == 0 && lexer.token() == Token.SELECT) {
            SQLCommentHint hint = hints.get(0);
            String hintText = hint.getText();
            if (hintText.startsWith("+TDDL")) {
                tddlSelectHints = true;
            }
        }
        if (tddlSelectHints) {
            SQLSelectStatement stmt = (SQLSelectStatement) this.parseStatement();
            stmt.setHeadHints(hints);
            statementList.add(stmt);
            return true;
        }
        MySqlHintStatement stmt = new MySqlHintStatement();
        stmt.setHints(hints);
        statementList.add(stmt);
        return true;
    }
    if (lexer.token() == Token.BEGIN) {
        statementList.add(this.parseBlock());
        return true;
    }
    return false;
}