feat(spanner): support for type UUID

Author: alkatrivedi

src/codec.ts

@@ -33,6 +33,7 @@ import {Big} from 'big.js';
 import {common as p} from 'protobufjs';
 import {google as spannerClient} from '../protos/protos';
 import {GoogleError} from 'google-gax';
+import * as uuid from 'uuid';
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type Value = any;
@@ -1034,6 +1035,7 @@ const TypeCode: {
   bool: 'BOOL',
   int64: 'INT64',
   pgOid: 'INT64',
+  uuid: 'UUID',
   float32: 'FLOAT32',
   float64: 'FLOAT64',
   numeric: 'NUMERIC',
@@ -1075,6 +1077,7 @@ interface FieldType extends Type {
 /**
  * @typedef {object} ParamType
  * @property {string} type The param type. Must be one of the following:
+ *     - uuid
  *     - float32
  *     - float64
  *     - int64
@@ -1157,6 +1160,10 @@ function getType(value: Value): Type {
     return {type: 'bool'};
   }
 
+  if (uuid.validate(value)) {
+    return {type: 'unspecified'};
+  }
+  
   if (isString(value)) {
     return {type: 'string'};
   }

src/transaction.ts

@@ -1728,7 +1728,15 @@ export class Snapshot extends EventEmitter {
     if (!isEmpty(typeMap)) {
       Object.keys(typeMap).forEach(param => {
         const type = typeMap[param];
-        paramTypes[param] = codec.createTypeObject(type);
+        const typeObject = codec.createTypeObject(type);
+        if (
+          (type.child &&
+            typeObject.code === 'ARRAY' &&
+            typeObject.arrayElementType?.code !== 'TYPE_CODE_UNSPECIFIED') ||
+          (!type.child && typeObject.code !== 'TYPE_CODE_UNSPECIFIED')
+        ) {
+          paramTypes[param] = codec.createTypeObject(type);
+        }
       });
     }