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more debugging on mysql nodestore fetch

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This commit is contained in:
Richard Holland
2025-02-14 15:37:16 +11:00
parent e8c52ce49a
commit 046cbdbe76
1 changed files with 13 additions and 9 deletions
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22
src/ripple/nodestore/backend/MySQLFactory.cpp
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@@ -351,6 +351,7 @@ public:
return dataCorrupt;
}
// After binding the result...
if (mysql_stmt_store_result(stmt))
{
std::cout << "fetch: Failed to store result. Error: "
@@ -365,23 +366,26 @@ public:
return notFound;
}
if (mysql_stmt_fetch(stmt))
// Get the metadata to find out the length of the BLOB column
MYSQL_RES* metadata = mysql_stmt_result_metadata(stmt);
if (!metadata)
{
std::cout << "fetch: Failed to fetch row. Error: "
<< mysql_stmt_error(stmt) << "\n";
std::cout << "fetch: Failed to get result metadata\n";
mysql_stmt_close(stmt);
return dataCorrupt;
}
unsigned long max_length = mysql_fetch_field(metadata)->max_length;
mysql_free_result(metadata);
std::cout << "fetch: Retrieved data length: " << length << "\n";
std::vector<uint8_t> buffer(length);
// Allocate buffer with the max length
std::vector<uint8_t> buffer(max_length);
bindResult.buffer = buffer.data();
bindResult.buffer_length = length;
bindResult.buffer_length = max_length;
if (mysql_stmt_fetch_column(stmt, &bindResult, 0, 0))
// Single fetch for the row
if (mysql_stmt_fetch(stmt))
{
std::cout << "fetch: Failed to fetch column. Error: "
std::cout << "fetch: Failed to fetch row. Error: "
<< mysql_stmt_error(stmt) << "\n";
mysql_stmt_close(stmt);
return dataCorrupt;