Note: At present, this section is just taken from PostgreSQL documentation and is subject to revision for Postgres-XC.
SPI_getvalue returns the string representation
of the value of the specified column.
The result is returned in memory allocated using
palloc. (You can use
pfree to release the memory when you don't
need it anymore.)
Note: At present, this section is just taken from PostgreSQL documentation and is subject to revision for Postgres-XC.
input row to be examined
input row description
column number (count starts at 1)
Note: At present, this section is just taken from PostgreSQL documentation and is subject to revision for Postgres-XC.
Column value, or NULL if the column is null, colnumber is out of range (SPI_result is set to SPI_ERROR_NOATTRIBUTE), or no output function is available (SPI_result is set to SPI_ERROR_NOOUTFUNC).