asc_tolower asc_toupper datum_lower datum_textcat datum_upper pg_lower pg_upper pnstrdup text_catenate textfunc_ttext textfunc_ttext_text textfunc_ttext_ttext

textfunc_ttext() Temporal * textfunc_ttext ( const Temporal *  temp, Datum(*)(Datum value)  func  ) Apply the function to transform the temporal text value.