In addition to actually moving to using the prepared statements the changes also include:
- Kill the cache_xxx() methods - the schema is going to be checked during the
prepared statement creation and during its execution.
- Move the caching of table ID and the prepared statement to the get_schema_ptr_or_create().
- Rename: get_schema_ptr_or_create() -> cache_table_info().
After these changes we are less strict in our demands to system_traces tables schemas, e.g.
if some column's type is not exactly as we expect but rather only "compatible" in the CQL sense
we will tolerate this and will continue to write into that table.
Signed-off-by: Vlad Zolotarov <vladz@scylladb.com>
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