Update index_advisor.cpp

src/gausskernel/dbmind/kernel/index_advisor.cpp

@@ -485,6 +485,14 @@ void get_join_condition_from_plan(Node* node, List* rtable)
     }
 }
 
+/*/*Add_index function:
+
+Parameter: (table cell * table, char * index _ name)
+
+Return value: None.
+
+Function: Add nodes to the table.*/
+
 void add_index(TableCell *table, char *index_name)
 {
     IndexCell *index = (IndexCell *)palloc0(sizeof(*index));
@@ -521,6 +529,8 @@ void add_index(TableCell *table, char *index_name)
     }
 }
 
+
+
 void get_order_condition_from_plan(Node* node)
 {
     Sort *sortopt = (Sort *)node;
@@ -564,6 +574,14 @@ void get_order_condition_from_plan(Node* node)
     }
 }
 
+/*Free_global_resource function
+
+Formal parameter: none
+
+Return value: None
+
+Role: release global resources.*/
+
 void free_global_resource()
 {
     list_free(g_drived_tables);
@@ -577,7 +595,14 @@ void free_global_resource()
     g_driver_table = NULL;
 }
 
-/* Search the oid of all indexes created on the table through the oid of the table, 
+/* 
+Get_table_indexes function:
+
+Parameter: oid
+
+Back to: list
+
+Search the oid of all indexes created on the table through the oid of the table, 
  * and return the index oid list. 
  */
 List *get_table_indexes(Oid oid)
@@ -650,7 +675,11 @@ List *get_index_attname(Oid index_oid)
     return attnames;
 }
 
-// Execute an SQL statement and return its result.
+/*
+Execute_ Stmt function:
+Formal parameters: (const char * query_string, bool need_result)
+Return: StmtResult
+Execute an SQL statement and return the result.*/
 StmtResult *execute_stmt(const char *query_string, bool need_result)
 {
     int16 format = 0;
@@ -757,7 +786,14 @@ void shutdown(DestReceiver *self) {
     /* nothing */ 
 }
 
-/* Release resources */
+/* 
+Destroy function:
+
+Parameter: (DestReceiver *self)
+
+Return: None
+
+The function frees all allocated memory.Release resources */
 void destroy(DestReceiver *self)
 {
     StmtResult *result = (StmtResult *)self;
@@ -772,6 +808,15 @@ void destroy(DestReceiver *self)
 }
 
 /*
+
+Find_select_stmt function:
+
+Parameter: (Node *parsetree)
+
+Return: None
+
+Recursively search the SelectStmt structure in the parse tree.
+
  * find_select_stmt
  *     Recursively search for SelectStmt structures within a parse tree.
  *
@@ -927,6 +972,12 @@ void get_partition_index_type(IndexPrint *suggested_index, TableCell *table)
 }
 
 /*
+Generate_ Index_ Print function:
+Formal parameters: (TableCell * table, char * index_print)
+Return: IndexPrint*
+Generate Index Printing
+
+
  * generat_index_print
  *     Generate index type, normal table is '' by default
  *     partition table is divided into local and global.
@@ -972,6 +1023,15 @@ IndexPrint *generat_index_print(TableCell *table, char *index_print)
     return suggested_index;
 }
 
+
+/*Find_table function:
+
+Parameter: (TableCell *table)
+
+Return: TableCell*
+
+Find index table*/
+
 TableCell *find_table(TableCell *table)
 {
     ListCell *item = NULL;
@@ -1528,6 +1588,11 @@ uint4 calculate_field_cardinality(char *schema_name, char *table_name, const cha
     return cardinality;
 }
 
+/*Split_ Field_ List function:
+Formal parameters: (List * fields, char * * schema_name_ptr, char * * table_name_ptr, char * * col_name_ptr)
+Return: None
+Split the specified area index table*/
+
 void split_field_list(List *fields, char **schema_name_ptr, char **table_name_ptr, char **col_name_ptr)
 {
     if (fields == NULL) {