oracle - 动态 Oracle 语句

Question

为什么我总是收到以下错误？

Fehlerbericht: ORA-00933: SQL-Befehl wurde nicht korrekt beendet
ORA-06512: in Zeile 13
00933. 00000 -  "SQL command not properly ended"
*Cause:    
*Action:

我的代码：

DECLARE
  match_count INTEGER;
  v_owner VARCHAR2(255) :='XXX';
  v_data_type VARCHAR2(255) :='CHAR';
  sqlstr varchar(255) := '';

BEGIN
  FOR t IN (SELECT owner, table_name, column_name FROM all_tab_cols where owner=v_owner and data_type = v_data_type and column_name = 'TEST') LOOP
  match_count:=0;

  if length(t.table_name) > 0 then
    sqlstr := 'SELECT COUNT(*) FROM ' || t.table_name || ' WHERE TEST<> ''000''';
    EXECUTE IMMEDIATE sqlstr into match_count;
  end if;

    IF match_count > 0 THEN
        execute immediate 'insert into search_db_results values (' || '''' || t.table_name || '''' || ',' || '''' || match_count || '''' || ')';

    END IF;

  END LOOP;
END;