diff --git a/plugin/trino-oracle/src/main/java/io/trino/plugin/oracle/OracleClient.java b/plugin/trino-oracle/src/main/java/io/trino/plugin/oracle/OracleClient.java
index b12517ce8460..c1eae8e38b59 100644
--- a/plugin/trino-oracle/src/main/java/io/trino/plugin/oracle/OracleClient.java
+++ b/plugin/trino-oracle/src/main/java/io/trino/plugin/oracle/OracleClient.java
@@ -46,6 +46,7 @@
 import javax.inject.Inject;
 
 import java.math.RoundingMode;
+import java.security.SecureRandom;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
@@ -107,8 +108,10 @@
 import static io.trino.spi.type.VarbinaryType.VARBINARY;
 import static io.trino.spi.type.VarcharType.createUnboundedVarcharType;
 import static io.trino.spi.type.VarcharType.createVarcharType;
+import static java.lang.Character.MAX_RADIX;
 import static java.lang.Float.floatToRawIntBits;
 import static java.lang.Float.intBitsToFloat;
+import static java.lang.Math.abs;
 import static java.lang.Math.floorDiv;
 import static java.lang.Math.floorMod;
 import static java.lang.Math.max;
@@ -124,6 +127,10 @@ public class OracleClient
 {
     public static final int ORACLE_MAX_LIST_EXPRESSIONS = 1000;
 
+    // Oracle before 12.2 doesn't allow identifiers over 30 characters
+    private static final int ORACLE_MAX_IDENTIFIER_LENGTH = 30;
+    private static final SecureRandom RANDOM = new SecureRandom();
+
     private static final int MAX_BYTES_PER_CHAR = 4;
 
     private static final int ORACLE_VARCHAR2_MAX_BYTES = 4000;
@@ -213,7 +220,8 @@ public PreparedStatement getPreparedStatement(Connection connection, String sql)
     @Override
     protected String generateTemporaryTableName()
     {
-        return "tmp_trino_" + System.nanoTime();
+        String tableName = "tmp_trino_" + System.nanoTime() + Long.toString(abs(RANDOM.nextLong()), MAX_RADIX);
+        return tableName.substring(0, min(ORACLE_MAX_IDENTIFIER_LENGTH, tableName.length()));
     }
 
     @Override