Rename Statement::getExpandedSQL() from #201 and fix #203 #205 memory leak

CHANGELOG.md

@@ -136,3 +136,4 @@ Version ?
 - #192 Add wrapper for bind parameter count
 - #197 Add tuple_bind and execute_many
 - #199 Fix #156 misleading error message in exception from Statement::exec
+- #201 Add Statement::getExpandedSQL() to get the SQL text of prepared statement with bound parameters expanded

include/SQLiteCpp/Statement.h

@@ -610,7 +610,7 @@ public:
     }
 
     // Return a UTF-8 string containing the SQL text of prepared statement with bound parameters expanded.
-    std::string getExtendedSQL();
+    std::string getExpandedSQL();
 
     /// Return the number of columns in the result set returned by the prepared statement
     inline int getColumnCount() const

src/Statement.cpp

@@ -426,8 +426,11 @@ const char* Statement::getErrorMsg() const noexcept // nothrow
 }
 
 // Return a UTF-8 string containing the SQL text of prepared statement with bound parameters expanded.
-std::string Statement::getExtendedSQL() {
-    return sqlite3_expanded_sql(mStmtPtr);
+std::string Statement::getExpandedSQL() {
+    char* expanded = sqlite3_expanded_sql(mStmtPtr);
+    std::string expandedString(expanded);
+    sqlite3_free(expanded);
+    return expandedString;
 }
 
 ////////////////////////////////////////////////////////////////////////////////

tests/Statement_test.cpp

@@ -257,7 +257,7 @@ TEST(Statement, bindings)
         insert.bind(1, text);
         insert.bind(2, integer);
         insert.bind(3, dbl);
-        EXPECT_EQ(insert.getExtendedSQL(), "INSERT INTO test VALUES (NULL, 'first', -123, 0.123)");
+        EXPECT_EQ(insert.getExpandedSQL(), "INSERT INTO test VALUES (NULL, 'first', -123, 0.123)");
         EXPECT_EQ(1, insert.exec());
         EXPECT_EQ(SQLITE_DONE, db.getErrorCode());