feat: tsdb cache support row format cache.

lastTest/README.md

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+# TDengine Query Test Tool
+
+A C program to test TDengine's query functionality with multi-threading and performance analysis.
+
+## Features
+
+- Multi-threaded query execution using `taos_query_a`
+- Performance testing with QPS statistics
+- Support for different query patterns
+- Thread-safe result collection
+- Configurable test parameters
+
+## Usage
+
+### Compilation
+
+```bash
+make all
+```
+
+### Basic Usage
+
+```bash
+./taos_query_a_simple <test_mode>
+```
+
+### Test Modes
+
+#### Mode 1: Table Name IN Query Test
+
+```bash
+./taos_query_a_simple 1
+```
+
+**SQL Query:**
+
+```sql
+SELECT tbname, last(*) 
+FROM test.meters 
+WHERE tbname IN ('d1','d2','d3','d4','d5','d6','d7','d8','d9','d10',
+                 'd11','d12','d13','d14','d15','d16','d17','d18','d19','d20',
+                 'd21','d22','d23','d24','d25','d26','d27','d28','d29','d30',
+                 'd31','d32','d33','d34','d35','d36','d37','d38','d39','d40',
+                 'd41','d42','d43','d44','d45','d46','d47','d48','d49','d50',
+                 'd51','d52','d53','d54','d55','d56','d57','d58','d59','d60',
+                 'd61','d62','d63','d64','d65','d66','d67','d68','d69','d70',
+                 'd71','d72','d73','d74','d75','d76','d77','d78','d79','d80',
+                 'd81','d82','d83','d84','d85','d86','d87','d88','d89','d90',
+                 'd91','d92','d93','d94','d95','d96','d97','d98','d99','d100') 
+PARTITION BY tbname;
+```
+
+**Parameters:**
+
+- **Thread Count**: 16 threads
+- **Queries per Thread**: 100 queries
+- **Max Concurrent Queries**: 5 per thread
+- **QPS Rate Multiplier**: 100x
+- **Purpose**: Tests query performance with `tbname IN` condition filtering multiple tables
+
+#### Mode 2: Sub-table Query Test
+
+```bash
+./taos_query_a_simple 2
+```
+
+**SQL Query:**
+
+```sql
+SELECT last(ts, r32) FROM test.d1;
+```
+
+**Parameters:**
+
+- **Thread Count**: 16 threads
+- **Queries per Thread**: 10,000 queries
+- **Max Concurrent Queries**: 5 per thread
+- **QPS Rate Multiplier**: 1x
+- **Purpose**: Tests query performance on a single sub-table
+
+## Connection Parameters
+
+Both modes use the same connection settings:
+
+- **Library Path**: `../../debug/build/lib/libtaos.so`
+- **Host**: `127.0.0.1`
+- **User**: `root`
+- **Password**: `taosdata`
+- **Database**: `test`
+
+## Performance Metrics
+
+The program measures and reports:
+
+- **Individual Thread QPS**: Performance of each thread
+- **Total QPS**: Sum of all threads' QPS (multiplied by rate factor)
+- **Query Execution Time**: Duration for completing all queries
+- **Concurrent Query Management**: Controls max concurrent queries per thread
+
+## Examples
+
+```bash
+# Run table name IN query test (Mode 1)
+./taos_query_a_simple 1
+
+# Run sub-table query test (Mode 2)
+./taos_query_a_simple 2
+```
+
+## Test Scenarios
+
+### Mode 1: Table Name IN Query Testing
+
+Tests query performance with `tbname IN` conditions:
+
+- Queries 100 specific tables using `tbname IN` clause
+- Uses `PARTITION BY tbname` for grouping
+- Tests filtering performance on multiple tables
+
+### Mode 2: Sub-table Query Testing
+
+Tests standard query performance on sub-tables:
+
+- Simple aggregation query on a single sub-table (`test.d1`)
+- High query volume (10,000 queries per thread)
+- Baseline performance measurement for sub-table queries
+
+## Output
+
+The program displays:
+
+- Individual thread performance metrics
+- Overall system performance statistics
+- Query execution status and timing
+- Error messages if any issues occur
+
+## Requirements
+
+- GCC compiler
+- TDengine client library
+- Linux system with pthread support
+- Running TDengine server
+- Proper database connection configuration
+
+## Configuration
+
+Make sure your TDengine server is running and accessible before executing the test program. The program will connect to the default TDengine instance unless modified in the source code.