Allow node-oracledb Thin mode to use DRCP Purity settings

Author: sharadraju

doc/src/release_notes.rst

@@ -20,7 +20,11 @@ Thin Mode Changes
 #)  Improve error message when an internal error handler fails and a connection
     is no longer usable.
 
-#)  Fixed bug where NJS-112 is thrown intermittently with some connections. 
+#)  Fixed bug where NJS-112 is thrown intermittently with some connections.
+
+#)  Fixed bug where DRCP connections from pool result in NUM_MISSES values to
+    increase instead of NUM_HITS in v$cpool_stats view by default. This fix
+    optimizes the use of DRCP connections.
 
 node-oracledb `v6.0.2 <https://github.com/oracle/node-oracledb/compare/v6.0.1...v6.0.2>`__ (27 Jun 2023)
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lib/thin/protocol/constants.js

@@ -41,6 +41,9 @@ module.exports = {
     constants.VERSION_MINOR << 20 |
     constants.VERSION_PATCH << 12,
   DRIVER_NAME: constants.DEFAULT_DRIVER_NAME + ' thn',
+  PURITY_DEFAULT: constants.PURITY_DEFAULT,
+  PURITY_NEW: constants.PURITY_NEW,
+  PURITY_SELF: constants.PURITY_SELF,
   SYSASM: constants.SYSASM,
   SYSBKP: constants.SYSBKP,
   SYSDBA: constants.SYSDBA,