doriswriter/src/main/java/com/alibaba/datax/plugin/writer/doriswriter/Keys.java [165:176]:
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    private void validateRequired() {
        final String[] requiredOptionKeys = new String[]{
                USERNAME,
                DATABASE,
                TABLE,
                COLUMN,
                LOAD_URL
        };
        for (String optionKey : requiredOptionKeys) {
            options.getNecessaryValue(optionKey, DBUtilErrorCode.REQUIRED_VALUE);
        }
    }
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selectdbwriter/src/main/java/com/alibaba/datax/plugin/writer/selectdbwriter/Keys.java [174:185]:
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    private void validateRequired() {
        final String[] requiredOptionKeys = new String[]{
                USERNAME,
                DATABASE,
                TABLE,
                COLUMN,
                LOAD_URL
        };
        for (String optionKey : requiredOptionKeys) {
            options.getNecessaryValue(optionKey, DBUtilErrorCode.REQUIRED_VALUE);
        }
    }
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