Update raw-template BBE to remove external dependency

examples/raw-templates/raw_templates.bal

@@ -1,31 +1,15 @@
-import ballerina/io;
-import ballerinax/java.jdbc;
-import ballerina/sql;
-
-jdbc:Client dbClient = check new (url = "jdbc:h2:file:./master/orderdb",
-                           user = "test", password = "test");
 
-public function main() returns error? {
-    // Uses a raw template to create the `Orders` table.
-    _ = check dbClient->execute(`CREATE TABLE IF NOT EXISTS Orders
-                                (orderId INTEGER NOT NULL, customerId INTEGER, noOfItems INTEGER,
-                                PRIMARY KEY (orderId))`);
-    // Uses a raw template to insert values to the `Orders` table.
-    _ = check dbClient->execute(`INSERT INTO Orders (orderId, customerId, noOfItems)
-                                 VALUES (1, 1, 20)`);
-    _ = check dbClient->execute(`INSERT INTO Orders (orderId, customerId, noOfItems)
-                                 VALUES (2, 1, 15)`);
+import ballerina/io;
+import ballerina/lang.'object as 'object;
 
-    stream<record {| anydata...; |}, sql:Error?> strm = getOrders(1);
-    record {|record {} value;|}|sql:Error? v = strm.next();
-    while (v is record {|record {} value;|}) {
-        record {} value = v.value;
-        io:println(value);
-        v = strm.next();
-    }
+function foo() returns boolean {
+    return false;
 }
 
-function getOrders(int customerId) returns stream<record {| anydata...; |}, sql:Error?> {
-    // In this raw template, the `customerId` variable is interpolated in the literal.
-    return dbClient->query(`SELECT * FROM orders WHERE customerId = ${customerId}`);
+public function main() {
+    int x = 5;
+    error y = error("foo");
+    'object:RawTemplate rawTemplate = `x is ${x}. y is ${y}. result of calling foo is ${foo()}`;
+    io:println(rawTemplate.strings);
+    io:println(rawTemplate.insertions);
 }

examples/raw-templates/raw_templates.md

@@ -1,22 +1,7 @@
 # Raw templates
 
-A raw template is a backtick template without a tag. Exposes result of phase 1 without further processing. Raw template is evaluated by evaluating each expression and creating an object containing.
-
-- an `array` of the `strings` separated by insertions
-- an `array` of the results of expression evaluation and an `array` of `strings` separating
-
->**Important use case:** SQL parameters.
-
->**Note:** The relevant database driver JAR should be defined in the `Ballerina.toml` file as a dependency. This sample is based on an H2 database and the H2 database driver JAR need to be added to `Ballerina.toml` file. This sample is written using H2 2.1.210 and it is recommended to use H2 JAR with versions higher than 2.1.210.
-
-For a sample configuration and more information on the underlying module, see the [`jdbc` module](https://lib.ballerina.io/ballerinax/java.jdbc/latest/).
+Raw template is a backtick string without a tag (such as `string` or `xml`). Backtick string is a sequence of characters interleaved with interpolations (`${expression}`), wrapped by a pair of backticks. The result of evaluating such a raw template is a `RawTemplate` object that has two fields `(readonly & string[]) strings` and `(any|error)[] insertions`.  `strings` array will have string literals in the backtick string broken at interpolations and `insertions` array will have the resultant value of evaluating each interpolation.
 
 ::: code raw_templates.bal :::
 
-Add the relevant database driver JAR details to the `Ballerina.toml` file.
-
-::: code Ballerina.toml :::
-
-Build and run the project using the `bal run` command.
-
-::: out raw_templates.out :::
+::: out raw_templates.out :::

examples/raw-templates/raw_templates.out

@@ -1,3 +1,3 @@
 $ bal run
-{"ORDERID":1,"CUSTOMERID":1,"NOOFITEMS":20}
-{"ORDERID":2,"CUSTOMERID":1,"NOOFITEMS":15}
+["x is ",". y is ",". result of calling foo is ",""]
+[5,error("foo"),false]