dbschema 0.1.2

Define database schema's as HCL files, and generate idempotent SQL migrations
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137

// Built-in HCL functions organized by category

pub mod base64;
pub mod collection;
pub mod conversion;
pub mod crypto;
pub mod datetime;
pub mod numeric;
pub mod string;
pub mod utility;

use hcl::eval::Context;

/// Create a context with all built-in functions
pub fn create_context() -> Context<'static> {
    let mut ctx = Context::new();

    // String functions
    ctx.declare_func("upper", string::create_upper_func());
    ctx.declare_func("lower", string::create_lower_func());
    ctx.declare_func("length", string::create_length_func());
    ctx.declare_func("substr", string::create_substr_func());
    ctx.declare_func("contains", string::create_contains_func());
    ctx.declare_func("startswith", string::create_startswith_func());
    ctx.declare_func("endswith", string::create_endswith_func());
    ctx.declare_func("trim", string::create_trim_func());
    ctx.declare_func("replace", string::create_replace_func());

    // Numeric functions
    ctx.declare_func("min", numeric::create_min_func());
    ctx.declare_func("max", numeric::create_max_func());
    ctx.declare_func("abs", numeric::create_abs_func());

    // Collection functions
    ctx.declare_func("concat", collection::create_concat_func());
    ctx.declare_func("flatten", collection::create_flatten_func());
    ctx.declare_func("distinct", collection::create_distinct_func());
    ctx.declare_func("slice", collection::create_slice_func());
    ctx.declare_func("sort", collection::create_sort_func());
    ctx.declare_func("reverse", collection::create_reverse_func());
    ctx.declare_func("index", collection::create_index_func());

    // Utility functions
    ctx.declare_func("coalesce", utility::create_coalesce_func());
    ctx.declare_func("join", utility::create_join_func());
    ctx.declare_func("split", utility::create_split_func());

    // Conversion functions
    ctx.declare_func("tostring", conversion::create_tostring_func());
    ctx.declare_func("tonumber", conversion::create_tonumber_func());
    ctx.declare_func("tobool", conversion::create_tobool_func());
    ctx.declare_func("tolist", conversion::create_tolist_func());
    ctx.declare_func("tomap", conversion::create_tomap_func());

    // Cryptographic functions
    ctx.declare_func("md5", crypto::create_md5_func());
    ctx.declare_func("sha256", crypto::create_sha256_func());
    ctx.declare_func("sha512", crypto::create_sha512_func());

    // Base64 functions
    ctx.declare_func("base64encode", base64::create_base64encode_func());
    ctx.declare_func("base64decode", base64::create_base64decode_func());

    // Datetime functions
    ctx.declare_func("timestamp", datetime::create_timestamp_func());
    ctx.declare_func("formatdate", datetime::create_formatdate_func());
    ctx.declare_func("timeadd", datetime::create_timeadd_func());
    ctx.declare_func("timecmp", datetime::create_timecmp_func());

    ctx
}

#[cfg(test)]
mod tests {
    use super::*;
    use hcl::eval::Evaluate;

    #[test]
    fn test_all_functions_registered() {
        let ctx = create_context();

        // Test that all functions are properly registered
        let functions = [
            "upper",
            "lower",
            "length",
            "substr",
            "contains",
            "startswith",
            "endswith",
            "trim",
            "replace",
            "min",
            "max",
            "abs",
            "concat",
            "flatten",
            "distinct",
            "slice",
            "sort",
            "reverse",
            "index",
            "coalesce",
            "join",
            "split",
            "tostring",
            "tonumber",
            "tobool",
            "tolist",
            "tomap",
            "md5",
            "sha256",
            "sha512",
            "base64encode",
            "base64decode",
            "timestamp",
            "formatdate",
            "timeadd",
            "timecmp",
        ];

        for func_name in functions {
            // Try to evaluate a simple call to each function to ensure it's registered
            let expr_str = format!("{}(\"test\")", func_name);
            let body: hcl::Body = hcl::from_str(&format!("test = {}", expr_str)).unwrap();
            let expr = body
                .attributes()
                .find(|a| a.key() == "test")
                .unwrap()
                .expr();

            // This will fail if the function is not registered, but that's expected for some functions
            // The important thing is that it doesn't panic due to unknown function
            let _ = expr.evaluate(&ctx);
        }
    }
}