解决issue -- 列存加唯一索引插100万数据慢问题

src/gausskernel/storage/cstore/cstore_allocspace.cpp

@@ -383,49 +383,7 @@ bool CStoreAllocator::ColSpaceCacheExist(const CFileNode* cnodes, int nColumn)
 
     LWLockRelease(CStoreColspaceCacheLock);
     return found;
-}
-
-/**
- * science we loose lock after get max cuid we will doubt the max cuid system 
- * here we recheck max cuid located in index
- * we want to make sure if there is on another larger cuid in index 
- */
-uint32 CStoreAllocator::recheck_max_cuid(Relation m_rel, uint32 max_cuid, int index_num, Relation* m_idxRelation)
-{
-    bool find = false;
-    List* index_rel_list = NIL;
-
-    for (int i = 0; i < index_num; ++i) {
-        Oid am_oid = m_idxRelation[i]->rd_rel->relam;
-        if (am_oid == CBTREE_AM_OID || am_oid == CGIN_AM_OID) {
-            index_rel_list = lappend(index_rel_list, m_idxRelation[i]);
-        }
-    }
-
-    if (list_length(index_rel_list) == 0) {
-        return max_cuid;
-    }
-    uint32 max_idx_cuid = CStore::GetMaxIndexCUID(m_rel, index_rel_list) + 1;
-    list_free_ext(index_rel_list);
-    
-    if (max_idx_cuid == MaxCUID) {
-        ereport(ERROR, (errcode(ERRCODE_INSUFFICIENT_RESOURCES),
-        errmsg("No CUID is left for new CU in relation \"%u\".", m_rel->rd_id)));
-    }
-    
-    if (max_idx_cuid > max_cuid) {
-        CStoreColFileDesc* entry = NULL;
-        CStoreColumnFileTag tag(m_rel->rd_node, VirtualSpaceCacheColID, MAIN_FORKNUM);
-        (void)LWLockAcquire(CStoreColspaceCacheLock, LW_EXCLUSIVE);
-        entry = (CStoreColFileDesc*)hash_search(CStoreColspaceCache, (void*)&tag, HASH_FIND, &find);
-        Assert(find);
-        entry->maxCuid = max_idx_cuid + 1;
-        LWLockRelease(CStoreColspaceCacheLock);
-        return max_idx_cuid;
-    }
-    return max_cuid;
-}
-    
+}   
 
 void CStoreFreeSpace::Initialize(int maxSize)
 {

src/gausskernel/storage/cstore/cstore_insert.cpp

@@ -1341,10 +1341,7 @@ void CStoreInsert::SaveAll(int options, _in_ const char* delBitmap)
     /* step 1: Lock relation for extension */
     LockRelationForExtension(m_relation, ExclusiveLock);
     uint32 curCUID = CStoreAllocator::GetNextCUID(m_relation);
-    if (m_resultRelInfo != NULL && m_resultRelInfo->ri_NumIndices > 0) {
-        curCUID = CStoreAllocator::recheck_max_cuid(
-            m_relation, curCUID, m_resultRelInfo->ri_NumIndices, m_idxRelation);
-    }
+    
     for (col = 0; col < attno; ++col) {
         if (m_relation->rd_att->attrs[col]->attisdropped)
             continue;

src/include/storage/cstore/cstorealloc.h

@@ -133,7 +133,6 @@ public:
 
     static uint64 GetExtendOffset(uint64 max_offset);
     static uint32 CalcExtendSize(uint64 cu_offset, uint32 cu_size, uint64 extend_offset);
-    static uint32 recheck_max_cuid(Relation m_rel, uint32 max_cuid, int index_num, Relation* m_idxRelation);
 };
 
 #endif