New remsql version (standalone queries only) that runs over cdb2api.

[dorinhogea]

The latest version of remsql, available for standalone queries, runs the latter over cdb2api instead of the remsql custom protocol.
There are a few additions to cdb2api, which are done using SET instructions (to minimize impact);

• passing protocol version (this lets live cross-cluster connections between different fdb versions)
• passing table version (required by distributed schema change versioning)
• passing cursor id (for tracking)
• passing schema morphing (specific for remote sql, simulates covering indexes for remote schemas)
  Three new tunables:
• fdb_remsql_cdb2api: switches standalone queries to cdb2api protocol
• fdb_default_version: testing only, configure a node to speak a specific remsql version by default (a remote node can downgrade this to a lower version, for backward compatibility)
• fdb_version_emulate_precdbapi: testing only, configure a remote remsql node to fail to parse new SET options and behave like 8.0

NOTE: this relies on the cdb2api ability to pass rows in sqlite format, which was developed initially to support fdb push (forwarding full sql to remote nodes).

[roborivers]

Coding style check: Error. ⚠.
Smoke testing: Success ✓.
Cbuild submission: Error ⚠.
Regression testing: 10/574 tests failed ⚠.

The first 10 failing tests are:
sc_inserts_logicalsc_generated [setup failure]
comdb2sys_queueodh_generated [setup failure]
fdb_push [setup failure]
biginplace [setup failure]
sc_resume_logicalsc_generated
sc_resume
tunables
auth_dba
truncatesc_ufid_on_generated
auth

[roborivers]

Coding style check: Error. ⚠.
Smoke testing: Success ✓.
Cbuild submission: Error ⚠.
Regression testing: 8/574 tests failed ⚠.

The first 10 failing tests are:
writes_remsql [setup failure]
misstable_remsql [setup failure]
basic_sslnoproto_generated [setup failure]
sc_resume
timepart_trunc_serialsc_generated
timepart_trunc
op_makerecord
dbcreate

[dorinhogea]

/plugin-branch remsqlcdb2api

[roborivers]

Coding style check: Error. ⚠.
Smoke testing: Success ✓.
Cbuild submission: Success ✓.
Regression testing: 6/575 tests failed ⚠.

The first 10 failing tests are:
timepart_retention1 [setup failure]
verify_error_partial_index_off_generated [setup failure]
basic_rowlocks_generated [setup failure]
basic_nogenid48_generated [setup failure]
analyze_exit_immediately
truncatesc_ufid_on_generated

[dorinhogea]

db2test Aug 26 14:02:30 2024 in-comdb2db remsqlcdb2api.R20240826.1