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--  Constraints for Table REFERENCE_SOURCE
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  ALTER TABLE "ENVX_OPER"."REFERENCE_SOURCE" MODIFY ("ID_REF_SOURCE" NOT NULL ENABLE);
  ALTER TABLE "ENVX_OPER"."REFERENCE_SOURCE" ADD CONSTRAINT "PK_REFERENCE_SOURCE" PRIMARY KEY ("ID_REF_SOURCE")
  USING INDEX "ENVX_OPER"."PK_REFERENCE_SOURCE"  ENABLE;