fastmodel-transform/fastmodel-transform-adbpg/src/main/java/com/aliyun/fastmodel/transform/adbpg/parser/AdbPostgreSQLAstBuilder.java [1005:1014]:
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    private BaseExpression toDefaultValue(List<BaseConstraint> inlineConstraint) {
        Optional<BaseConstraint> first = inlineConstraint.stream().filter(c -> {
            return c.getConstraintType() == ConstraintType.DEFAULT_VALUE;
        }).findFirst();
        if (first.isEmpty()) {
            return null;
        }
        DefaultValueConstraint defaultValueConstraint = (DefaultValueConstraint)first.get();
        return defaultValueConstraint.getValue();
    }
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fastmodel-transform/fastmodel-transform-hologres/src/main/java/com/aliyun/fastmodel/transform/hologres/parser/HologresAstBuilder.java [976:985]:
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    private BaseExpression toDefaultValue(List<BaseConstraint> inlineConstraint) {
        Optional<BaseConstraint> first = inlineConstraint.stream().filter(c -> {
            return c.getConstraintType() == ConstraintType.DEFAULT_VALUE;
        }).findFirst();
        if (first.isEmpty()) {
            return null;
        }
        DefaultValueConstraint defaultValueConstraint = (DefaultValueConstraint)first.get();
        return defaultValueConstraint.getValue();
    }
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