datum_lower datum_textcat datum_upper textcat_base_ttext textcat_ttext_base textcat_ttext_ttext textfunc_ttext textfunc_ttext_text textfunc_ttext_ttext ttext_lower ttext_upper

ttext_lower() PGDLLEXPORT Datum ttext_lower ( PG_FUNCTION_ARGS  ) Transform the temporal text value into lowercase.