feat: implement JSON_EXTRACT for mssql, mysql, pg

packages/nocodb/src/db/functionMappings/mssql.ts

@@ -209,6 +209,17 @@ const mssql = {
       ),
     };
   },
+  JSON_EXTRACT: async ({ fn, knex, pt, colAlias }: MapFnArgs) => {
+    return {
+      builder: knex.raw(
+        `CASE WHEN ISJSON(${
+          (await fn(pt.arguments[0])).builder
+        }) = 1 THEN JSON_VALUE(${(await fn(pt.arguments[0])).builder}, ${
+          (await fn(pt.arguments[1])).builder
+        }) ELSE NULL END${colAlias}`,
+      ),
+    };
+  },
 };
 
 export default mssql;

packages/nocodb/src/db/functionMappings/mysql.ts

@@ -171,6 +171,17 @@ END) ${colAlias}`,
       ),
     };
   },
+  JSON_EXTRACT: async ({ fn, knex, pt, colAlias }: MapFnArgs) => {
+    return {
+      builder: knex.raw(
+        `CASE WHEN JSON_VALID(${
+          (await fn(pt.arguments[0])).builder
+        }) = 1 THEN JSON_EXTRACT(${(await fn(pt.arguments[0])).builder}, ${
+          (await fn(pt.arguments[1])).builder
+        }) ELSE NULL END${colAlias}`,
+      ),
+    };
+  },
 };
 
 export default mysql2;

packages/nocodb/src/db/functionMappings/pg.ts

@@ -359,6 +359,19 @@ END ${colAlias}`,
       ),
     };
   },
+  JSON_EXTRACT: async ({ fn, knex, pt, colAlias }: MapFnArgs) => {
+    return {
+      builder: knex.raw(
+        `CASE WHEN (${
+          (await fn(pt.arguments[0])).builder
+        })::jsonb IS NOT NULL THEN (${
+          (await fn(pt.arguments[0])).builder
+        })::jsonb #> ${
+          (await fn(pt.arguments[1])).builder
+        } ELSE NULL END${colAlias}`,
+      ),
+    };
+  },
 };
 
 export default pg;