Avoid getParameterType use with Oracle 12c driver by default

Issue: SPR-14629
Issue: SPR-14574
Issue: SPR-14191
(cherry picked from commit 52447ef)

Author: jhoeller

spring-jdbc/src/main/java/org/springframework/jdbc/core/StatementCreatorUtils.java

@@ -79,7 +79,7 @@ public abstract class StatementCreatorUtils {
 	public static final String IGNORE_GETPARAMETERTYPE_PROPERTY_NAME = "spring.jdbc.getParameterType.ignore";
 
 
-	static final boolean shouldIgnoreGetParameterType = SpringProperties.getFlag(IGNORE_GETPARAMETERTYPE_PROPERTY_NAME);
+	static final Boolean shouldIgnoreGetParameterType;
 
 	static final Set<String> driversWithNoSupportForGetParameterType =
 			Collections.newSetFromMap(new ConcurrentHashMap<String, Boolean>(1));
@@ -89,6 +89,9 @@ public abstract class StatementCreatorUtils {
 	private static final Map<Class<?>, Integer> javaTypeToSqlTypeMap = new HashMap<Class<?>, Integer>(32);
 
 	static {
+		String propVal = SpringProperties.getProperty(IGNORE_GETPARAMETERTYPE_PROPERTY_NAME);
+		shouldIgnoreGetParameterType = (propVal != null ? Boolean.valueOf(propVal) : null);
+
 		javaTypeToSqlTypeMap.put(boolean.class, Types.BOOLEAN);
 		javaTypeToSqlTypeMap.put(Boolean.class, Types.BOOLEAN);
 		javaTypeToSqlTypeMap.put(byte.class, Types.TINYINT);
@@ -246,18 +249,29 @@ private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, S
 			Integer sqlTypeToUse = null;
 			DatabaseMetaData dbmd = null;
 			String jdbcDriverName = null;
-			boolean checkGetParameterType = !shouldIgnoreGetParameterType;
-			if (checkGetParameterType && !driversWithNoSupportForGetParameterType.isEmpty()) {
+			boolean tryGetParameterType = true;
+
+			if (shouldIgnoreGetParameterType == null) {
 				try {
 					dbmd = ps.getConnection().getMetaData();
 					jdbcDriverName = dbmd.getDriverName();
-					checkGetParameterType = !driversWithNoSupportForGetParameterType.contains(jdbcDriverName);
+					tryGetParameterType = !driversWithNoSupportForGetParameterType.contains(jdbcDriverName);
+					if (tryGetParameterType && jdbcDriverName.startsWith("Oracle")) {
+						// Avoid getParameterType use with Oracle 12c driver by default:
+						// needs to be explicitly activated through spring.jdbc.getParameterType.ignore=false
+						tryGetParameterType = false;
+						driversWithNoSupportForGetParameterType.add(jdbcDriverName);
+					}
 				}
 				catch (Throwable ex) {
 					logger.debug("Could not check connection metadata", ex);
 				}
 			}
-			if (checkGetParameterType) {
+			else {
+				tryGetParameterType = !shouldIgnoreGetParameterType;
+			}
+
+			if (tryGetParameterType) {
 				try {
 					sqlTypeToUse = ps.getParameterMetaData().getParameterType(paramIndex);
 				}
@@ -267,6 +281,7 @@ private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, S
 					}
 				}
 			}
+
 			if (sqlTypeToUse == null) {
 				// JDBC driver not compliant with JDBC 3.0 -> proceed with database-specific checks
 				sqlTypeToUse = Types.NULL;
@@ -277,8 +292,7 @@ private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, S
 					if (jdbcDriverName == null) {
 						jdbcDriverName = dbmd.getDriverName();
 					}
-					if (checkGetParameterType &&
-							!(jdbcDriverName.startsWith("Oracle") && dbmd.getDriverMajorVersion() >= 12)) {
+					if (shouldIgnoreGetParameterType == null) {
 						// Register JDBC driver with no support for getParameterType, except for the
 						// Oracle 12c driver where getParameterType fails for specific statements only
 						// (so an exception thrown above does not indicate general lack of support).

spring-jdbc/src/test/java/org/springframework/jdbc/core/StatementCreatorUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -103,7 +103,6 @@ public void testSetParameterValueWithNullAndGetParameterTypeWorking() throws SQL
 		given(pmd.getParameterType(1)).willReturn(Types.SMALLINT);
 		StatementCreatorUtils.setParameterValue(preparedStatement, 1, SqlTypeValue.TYPE_UNKNOWN, null, null);
 		verify(pmd).getParameterType(1);
-		verify(preparedStatement, never()).getConnection();
 		verify(preparedStatement).setNull(1, Types.SMALLINT);
 		assertTrue(StatementCreatorUtils.driversWithNoSupportForGetParameterType.isEmpty());
 	}