feat: Implement isnumeric function

AmrDeveloper · Oct 25, 2023 · 0e7df1c · 0e7df1c
1 parent 150083a
commit 0e7df1c
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Showing 2 changed files with 18 additions and 3 deletions.
diff --git a/crates/gitql-ast/src/function.rs b/crates/gitql-ast/src/function.rs
@@ -48,6 +48,7 @@ lazy_static! {
 
         // Other Functions
         map.insert("isnull", general_is_null);
+        map.insert("isnumeric", general_is_numeric);
         map
     };
 }
@@ -255,6 +256,13 @@ lazy_static! {
                 result: DataType::Boolean,
             },
         );
+        map.insert(
+            "isnumeric",
+            Prototype {
+                parameters: vec![DataType::Any],
+                result: DataType::Boolean,
+            },
+        );
         map
     };
 }
@@ -511,3 +519,8 @@ fn date_make_date(inputs: Vec<Value>) -> Value {
 fn general_is_null(inputs: Vec<Value>) -> Value {
     return Value::Boolean(inputs[0].data_type() == DataType::Null);
 }
+
+fn general_is_numeric(inputs: Vec<Value>) -> Value {
+    let input_type = inputs[0].data_type();
+    return Value::Boolean(input_type.is_number());
+}
diff --git a/docs/function/functions.md b/docs/function/functions.md
@@ -73,10 +73,12 @@ SELECT NOW()
 
 ### General functions
 
-| Name   | Paramters | Return  | Description                               |
-| ------ | --------- | ------- | ----------------------------------------- |
-| ISNULL | ANY       | BOOLEAN | Return TRUE if the argument type is null. |
+| Name      | Paramters | Return  | Description                                 |
+| --------- | --------- | ------- | ------------------------------------------- |
+| ISNULL    | ANY       | BOOLEAN | Return TRUE if the argument type is null.   |
+| ISNUMERIC | ANY       | BOOLEAN | Return TRUE if the argument type is number. |
 
 ```sql
 SELECT ISNULL(null), ISNULL(1)
+SELECT ISNUMERIC(null), ISNUMERIC(1), ISNUMERIC(1.1), ISNUMERIC(false)
 ```