change default value for cte parameters

Author: shizy818

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java

@@ -422,10 +422,10 @@ public class IoTDBConfig {
   private long sortBufferSize = 32 * 1024 * 1024L;
 
   /** The buffer for cte scan operation */
-  private long cteBufferSize = 32 * 1024 * 1024L;
+  private long cteBufferSize = 128 * 1024L;
 
   /** Max number of rows for cte materialization */
-  private int maxRowsInCteBuffer = 10000;
+  private int maxRowsInCteBuffer = 1000;
 
   /** Mods cache size limit per fi */
   private long modsCacheSizeLimitPerFI = 32 * 1024 * 1024;

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBDescriptor.java

@@ -1051,13 +1051,22 @@ public void loadProperties(TrimProperties properties) throws BadNodeUrlException
     loadFixedSizeLimitForQuery(properties, "sort_buffer_size_in_bytes", conf::setSortBufferSize);
 
     // The buffer for cte materialization.
-    loadFixedSizeLimitForQuery(properties, "cte_buffer_size_in_bytes", conf::setCteBufferSize);
+    long cteBufferSizeInBytes =
+        Long.parseLong(
+            properties.getProperty(
+                "cte_buffer_size_in_bytes", Long.toString(conf.getCteBufferSize())));
+    if (cteBufferSizeInBytes > 0) {
+      conf.setCteBufferSize(cteBufferSizeInBytes);
+    }
 
     // max number of rows for cte materialization
-    conf.setMaxRowsInCteBuffer(
+    int maxRowsInCteBuffer =
         Integer.parseInt(
             properties.getProperty(
-                "max_rows_in_cte_buffer", Integer.toString(conf.getMaxRowsInCteBuffer()))));
+                "max_rows_in_cte_buffer", Integer.toString(conf.getMaxRowsInCteBuffer())));
+    if (maxRowsInCteBuffer > 0) {
+      conf.setMaxRowsInCteBuffer(maxRowsInCteBuffer);
+    }
 
     loadFixedSizeLimitForQuery(
         properties, "mods_cache_size_limit_per_fi_in_bytes", conf::setModsCacheSizeLimitPerFI);

iotdb-core/node-commons/src/assembly/resources/conf/iotdb-system.properties.template

@@ -1123,8 +1123,8 @@ batch_size=100000
 # Datatype: long
 sort_buffer_size_in_bytes=0
 
-# The buffer size for CTE materialization. If cte_buffer_size_in_bytes <= 0, default value will be used, default value =
-# min(32MB, memory for query operators / query_thread_count / 2). if cte_buffer_size_in_bytes > 0, the specified value will be used.
+# The buffer size for CTE materialization. If cte_buffer_size_in_bytes <= 0, a default value of 128 KB is used; otherwise the specified value
+# will be used.
 # effectiveMode: hot_reload
 # Datatype: long
 cte_buffer_size_in_bytes=0
@@ -1133,7 +1133,7 @@ cte_buffer_size_in_bytes=0
 # Max rows for CTE materialization
 # effectiveMode: hot_reload
 # Datatype: int
-max_rows_in_cte_buffer=10000
+max_rows_in_cte_buffer=1000
 
 # The maximum mod entries size that each FragmentInstance can cache.
 # if mods_cache_size_limit_per_fi_in_bytes <= 0, default value will be used, default value = min(32MB, memory for query operators / query_thread_count / 2)