SPI_getargtypeid — return the data type OID for an argument of a
statement prepared by
SPI_getargtypeid returns the OID
representing the type for the
argIndex'th argument of a statement
argument is at index zero.
prepared statement (returned by
zero based index of the argument
The type OID of the argument at the given index. If the
NULL or invalid, or
argIndex is less than 0 or not less
than the number of arguments declared for the
SPI_result is set to
InvalidOid is returned.
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