Issue Description

• Description of the issue:
  When import data into target table, unexpected column name found which cause import failure
  issue1: No such column a1 in stream default.gj_rtdc_oms_order_statistics
  issue2: provided field 'securityid1' not found in table default.gj_i_futurePositionAmount_fix3

• Sling version (sling --version):
  1.2.20-rc10-timeplus
  1.2.20-rc8-timeplus

• Operating System (linux, mac, windows):
  linux