!2950 支持兼容lock tables语法和功能

Merge pull request !2950 from 王修强/lock_table

src/gausskernel/optimizer/commands/lockcmds.cpp

@@ -38,6 +38,10 @@ static void RangeVarCallbackForLockTable(
  */
 void LockTableCommand(LockStmt* lockstmt)
 {
+    if (DB_IS_CMPT(B_FORMAT) && lockstmt->isLockTables) {
+        TransactionState s = GetCurrentTransactionState();
+        s->blockState = TBLOCK_INPROGRESS;
+    }
     ListCell* p = NULL;
 
     /*

src/include/nodes/parsenodes.h

@@ -2160,6 +2160,7 @@ typedef struct LockStmt {
     bool nowait;     /* no wait mode */
     bool cancelable; /* send term to lock holder */
     int waitSec;      /* WAIT time Sec */
+    bool isLockTables; /* lock tables flag */
 } LockStmt;
 
 /* ----------------------