#include "postgres.h"
#include "executor/executor.h"
#include "utils/fmgrprotos.h"
#include "utils/geo_decls.h"
#include "varatt.h"

Include dependency graph for funcs.c:

Variables
	PG_MODULE_MAGIC

Function Documentation

◆ add_one()

Datum add_one ( PG_FUNCTION_ARGS )

Definition at line 26 of file funcs.c.

{
    int32       arg = PG_GETARG_INT32(0);
 
    PG_RETURN_INT32(arg + 1);
}

References arg, PG_GETARG_INT32, and PG_RETURN_INT32.

◆ add_one_float8()

Datum add_one_float8 ( PG_FUNCTION_ARGS )

Definition at line 38 of file funcs.c.

{
    /* The macros for FLOAT8 hide its pass-by-reference nature */
    float8      arg = PG_GETARG_FLOAT8(0);
 
    PG_RETURN_FLOAT8(arg + 1.0);
}

References arg, PG_GETARG_FLOAT8, and PG_RETURN_FLOAT8.

◆ c_overpaid()

Datum c_overpaid ( PG_FUNCTION_ARGS )

Definition at line 131 of file funcs.c.

{
    HeapTupleHeader t = PG_GETARG_HEAPTUPLEHEADER(0);
    int32       limit = PG_GETARG_INT32(1);
    bool        isnull;
    int32       salary;
 
    salary = DatumGetInt32(GetAttributeByName(t, "salary", &isnull));
    if (isnull)
        PG_RETURN_BOOL(false);
 
    /*
     * Alternatively, we might prefer to do PG_RETURN_NULL() for null salary
     */
 
    PG_RETURN_BOOL(salary > limit);
}

References DatumGetInt32(), GetAttributeByName(), PG_GETARG_HEAPTUPLEHEADER, PG_GETARG_INT32, and PG_RETURN_BOOL.

◆ concat_text()

Datum concat_text ( PG_FUNCTION_ARGS )

Definition at line 92 of file funcs.c.

{
    text       *arg1 = PG_GETARG_TEXT_PP(0);
    text       *arg2 = PG_GETARG_TEXT_PP(1);
    int32       arg1_size = VARSIZE_ANY_EXHDR(arg1);
    int32       arg2_size = VARSIZE_ANY_EXHDR(arg2);
    int32       new_text_size = arg1_size + arg2_size + VARHDRSZ;
    text       *new_text = (text *) palloc(new_text_size);
 
    SET_VARSIZE(new_text, new_text_size);
    memcpy(VARDATA(new_text), VARDATA_ANY(arg1), arg1_size);
    memcpy(VARDATA(new_text) + arg1_size, VARDATA_ANY(arg2), arg2_size);
    PG_RETURN_TEXT_P(new_text);
}

References palloc(), PG_GETARG_TEXT_PP, PG_RETURN_TEXT_P, SET_VARSIZE(), VARDATA(), VARDATA_ANY(), VARHDRSZ, and VARSIZE_ANY_EXHDR().

◆ copytext()

Datum copytext ( PG_FUNCTION_ARGS )

Definition at line 66 of file funcs.c.

{
    text       *t = PG_GETARG_TEXT_PP(0);
 
    /*
     * VARSIZE_ANY_EXHDR is the size of the struct in bytes, minus the
     * VARHDRSZ or VARHDRSZ_SHORT of its header.  Construct the copy with a
     * full-length header.
     */
    text       *new_t = (text *) palloc(VARSIZE_ANY_EXHDR(t) + VARHDRSZ);
 
    SET_VARSIZE(new_t, VARSIZE_ANY_EXHDR(t) + VARHDRSZ);
 
    /*
     * VARDATA is a pointer to the data region of the new struct.  The source
     * could be a short datum, so retrieve its data through VARDATA_ANY.
     */
    memcpy(VARDATA(new_t),      /* destination */
           VARDATA_ANY(t),      /* source */
           VARSIZE_ANY_EXHDR(t));   /* how many bytes */
    PG_RETURN_TEXT_P(new_t);
}

References palloc(), PG_GETARG_TEXT_PP, PG_RETURN_TEXT_P, SET_VARSIZE(), VARDATA(), VARDATA_ANY(), VARHDRSZ, and VARSIZE_ANY_EXHDR().

◆ makepoint()

Datum makepoint ( PG_FUNCTION_ARGS )

Definition at line 49 of file funcs.c.

{
    Point      *pointx = PG_GETARG_POINT_P(0);
    Point      *pointy = PG_GETARG_POINT_P(1);
    Point      *new_point = (Point *) palloc(sizeof(Point));
 
    new_point->x = pointx->x;
    new_point->y = pointy->y;
 
    PG_RETURN_POINT_P(new_point);
}

References palloc(), PG_GETARG_POINT_P, PG_RETURN_POINT_P, Point::x, and Point::y.

◆ PG_FUNCTION_INFO_V1() [1/7]

PG_FUNCTION_INFO_V1 ( add_one )

◆ PG_FUNCTION_INFO_V1() [2/7]

PG_FUNCTION_INFO_V1 ( add_one_float8 )

◆ PG_FUNCTION_INFO_V1() [3/7]

PG_FUNCTION_INFO_V1 ( c_overpaid )

◆ PG_FUNCTION_INFO_V1() [4/7]

PG_FUNCTION_INFO_V1 ( concat_text )

◆ PG_FUNCTION_INFO_V1() [5/7]

PG_FUNCTION_INFO_V1 ( copytext )

◆ PG_FUNCTION_INFO_V1() [6/7]

PG_FUNCTION_INFO_V1 ( makepoint )

◆ PG_FUNCTION_INFO_V1() [7/7]

PG_FUNCTION_INFO_V1 ( t_starts_with )

◆ t_starts_with()

Datum t_starts_with ( PG_FUNCTION_ARGS )

Definition at line 112 of file funcs.c.

{
    text       *t1 = PG_GETARG_TEXT_PP(0);
    text       *t2 = PG_GETARG_TEXT_PP(1);
    Oid         collid = PG_GET_COLLATION();
    bool        result;
 
    result = DatumGetBool(DirectFunctionCall2Coll(text_starts_with,
                                                  collid,
                                                  PointerGetDatum(t1),
                                                  PointerGetDatum(t2)));
    PG_RETURN_BOOL(result);
}

References collid, DatumGetBool(), DirectFunctionCall2Coll(), PG_GET_COLLATION, PG_GETARG_TEXT_PP, PG_RETURN_BOOL, PointerGetDatum(), and text_starts_with().

Variable Documentation

◆ PG_MODULE_MAGIC

PG_MODULE_MAGIC

Definition at line 18 of file funcs.c.

Functions
	PG_FUNCTION_INFO_V1 (add_one)

Datum	add_one (PG_FUNCTION_ARGS)

	PG_FUNCTION_INFO_V1 (add_one_float8)

Datum	add_one_float8 (PG_FUNCTION_ARGS)

	PG_FUNCTION_INFO_V1 (makepoint)

Datum	makepoint (PG_FUNCTION_ARGS)

	PG_FUNCTION_INFO_V1 (copytext)

Datum	copytext (PG_FUNCTION_ARGS)

	PG_FUNCTION_INFO_V1 (concat_text)

Datum	concat_text (PG_FUNCTION_ARGS)

	PG_FUNCTION_INFO_V1 (t_starts_with)

Datum	t_starts_with (PG_FUNCTION_ARGS)

	PG_FUNCTION_INFO_V1 (c_overpaid)

Datum	c_overpaid (PG_FUNCTION_ARGS)

Functions

Variables