mysqltest vector_index.sparse_vector_index_vsag_offline_ddl fails with 'Invalid argument (1210)' on INSERT for VSAG+SINDI sparse vector index table

Environment

• Version: Server version: 5.7.25 OceanBase seekdb (r) (Built 1-6006e21fa93bdfcf5496d13de61fe94aacaebaa4 Apr 6 2026)

Reproduction Environment

• Machine: Android Studio Android Virtual Device
• Device: emulator-5554
• Platform: arm64
• Startup Command: ./data/local/tmp/seekdb --nodaemon --base-dir /data/local/tmp/seekdb_data --port 5881
• Listening Port: 5881

Actual Result

Steps to Reproduce

1. Navigate to the directory /obdata/data/AndroidTest/ob_opensource_test/tools/deploy on the machine.
2. Execute the following commands:

export OCEANBASE_HOME=/obdata/data/AndroidTest/ob_opensource_test/
cd ${OCEANBASE_HOME}/tools/deploy
source activate_obd.sh
export OBD_SEEKDB_STATUS_FALLBACK_TCP=1

obd test mysqltest test_env --mysqltest-bin=${OCEANBASE_HOME}/deps/3rd/u01/obclient/bin/mysqltest --obclient-bin=${OCEANBASE_HOME}/deps/3rd/u01/obclient/bin/obclient --init-only --init-sql-dir=${OCEANBASE_HOME}/tools/deploy --init-sql-files='init.sql,init_user.sql|root@sys|test'
obd test mysqltest test_env --mysqltest-bin=${OCEANBASE_HOME}/deps/3rd/u01/obclient/bin/mysqltest --obclient-bin=${OCEANBASE_HOME}/deps/3rd/u01/obclient/bin/obclient --disable-reboot --test-set=vector_index.sparse_vector_index_vsag_offline_ddl

Execution Output:

SQL to Reproduce

CREATE DATABASE IF NOT EXISTS sparse_offline_ddl;
USE sparse_offline_ddl;

ALTER SYSTEM SET ob_vector_memory_limit_percentage = 20;

DROP TABLE IF EXISTS t1;

CREATE TABLE t1(
  c1 INT,
  c2 SPARSEVECTOR,
  PRIMARY KEY(c1),
  VECTOR INDEX idx1(c2)
    WITH (distance=inner_product, type=sindi, lib=vsag)
);

-- Optional: Confirm table creation succeeded
SHOW CREATE TABLE t1;

-- 【Failure】Expected to succeed, actual error 1210
INSERT INTO t1 VALUES (1, '{1:0.1, 2:0.2, 3:0.3}');

Start by running the mysqltest set vector_index.sparse_vector_index_vsag_offline_ddl with the provided deployment commands, then reproduce the INSERT from the SQL example. Trace the sparse-vector table path for the VSAG+SINDI offline DDL configuration and determine why the INSERT returns error 1210. Done means the INSERT succeeds and the named mysqltest passes with regression coverage for this case.