use original string to detect duplicate

Signed-off-by: AilinKid <314806019@qq.com>
pingcap · May 25, 2022 · 52ef358 · 52ef358
1 parent db2b48c
commit 52ef358
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diff --git a/planner/core/logical_plan_builder.go b/planner/core/logical_plan_builder.go
@@ -3844,6 +3844,10 @@ func (b *PlanBuilder) buildSelect(ctx context.Context, sel *ast.SelectStmt) (p L
 		}
 	}
 
+	if strings.HasPrefix(b.ctx.GetSessionVars().StmtCtx.OriginalSQL, "SELECT LAST_VALUE((SELECT upper.j FROM t LIMIT 1)) OVER (PARTITION BY i)  FROM t AS upper") {
+		fmt.Println(1)
+	}
+
 	hasWindowFuncField := b.detectSelectWindow(sel)
 	// Some SQL statements define WINDOW but do not use them. But we also need to check the window specification list.
 	// For example: select id from t group by id WINDOW w AS (ORDER BY uids DESC) ORDER BY id;

diff --git a/planner/core/preprocess.go b/planner/core/preprocess.go
@@ -1037,7 +1037,7 @@ func isTableAliasDuplicate(ctx sessionctx.Context, node ast.ResultSetNode, table
 				}
 			}
 		}
-		_, exists := tableAliases[tabName.L]
+		_, exists := tableAliases[tabName.O]
 		if len(tabName.L) != 0 && exists {
 			names := strings.Split(tabName.O, ".")
 			return ErrNonUniqTable.GenWithStackByArgs(names[len(names)-1])