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/*------------------------------------------------------------------------- * * tupconvert.h * Tuple conversion support. * * * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/access/tupconvert.h * *------------------------------------------------------------------------- */ #ifndef TUPCONVERT_H #define TUPCONVERT_H #include "access/htup.h" #include "access/tupdesc.h" typedef struct TupleConversionMap { TupleDesc indesc; /* tupdesc for source rowtype */ TupleDesc outdesc; /* tupdesc for result rowtype */ AttrNumber *attrMap; /* indexes of input fields, or 0 for null */ Datum *invalues; /* workspace for deconstructing source */ bool *inisnull; Datum *outvalues; /* workspace for constructing result */ bool *outisnull; } TupleConversionMap; extern TupleConversionMap *convert_tuples_by_position(TupleDesc indesc, TupleDesc outdesc, const char *msg); extern TupleConversionMap *convert_tuples_by_name(TupleDesc indesc, TupleDesc outdesc, const char *msg); extern AttrNumber *convert_tuples_by_name_map(TupleDesc indesc, TupleDesc outdesc, const char *msg); extern HeapTuple do_convert_tuple(HeapTuple tuple, TupleConversionMap *map); extern void free_conversion_map(TupleConversionMap *map); #endif /* TUPCONVERT_H */