Mercurial > gemma
view pkg/misc/encode.go @ 2130:f3aabc05f9b2
Fix constraints on waterway profiles
staging_done in the UNIQUE constraint had no effect, because the
exclusion constraint prevented two rows with equal location and
validity anyhow. Adding staging_done to the exclusion constraint
makes the UNIQUE constraint checking only a corner case of what
the exclusion constraint checks. Thus, remove the UNIQUE constraint.
Casting staging_done to int is needed because there is no appropriate
operator class for booleans. Casting to smallint or even bit would have
been better (i.e. should result in smaller index size), but that would
have required creating such a CAST, in addition.
author | Tom Gottfried <tom@intevation.de> |
---|---|
date | Wed, 06 Feb 2019 15:42:32 +0100 |
parents | 5b9b8eabcd01 |
children |
line wrap: on
line source
// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package misc import ( "encoding/binary" "io" ) // BinReader is a io.Reader to support an error tolerant way // to read big endian encoded binary data. type BinReader struct { io.Reader // Err is the first encountered error. Err error } // Read implements io.Reader without any endian awareness. func (r *BinReader) Read(buf []byte) (int, error) { if r.Err != nil { return 0, r.Err } var n int n, r.Err = r.Read(buf) return n, r.Err } // ReadBin reads big endian encodes binary data into x. // If an error was encountered before no data is read. func (r *BinReader) ReadBin(x interface{}) { if r.Err == nil { r.Err = binary.Read(r.Reader, binary.BigEndian, x) } } // ReadString reads a big endian encoded string from // the underlying io.Reader into *s. // If an error was encountered before no data is read // and *s is unmodified. func (r *BinReader) ReadString(s *string) { if r.Err != nil { return } var l uint32 if r.Err = binary.Read(r.Reader, binary.BigEndian, &l); r.Err != nil { return } b := make([]byte, l) if r.Err = binary.Read(r.Reader, binary.BigEndian, b); r.Err != nil { return } *s = string(b) } // BinWriter is a io.Writer to support an error tolerant way // to write big endian encoded binary data. type BinWriter struct { io.Writer // Err is the first encountered error. Err error } // Write implements io.Writer without any endian awareness. func (w *BinWriter) Write(buf []byte) (int, error) { if w.Err != nil { return 0, w.Err } var n int n, w.Err = w.Writer.Write(buf) return n, w.Err } // WriteBin writes x big endian encoded to the underlying io.Writer. // If an error was encountered before no data is written. func (w *BinWriter) WriteBin(x interface{}) { if w.Err == nil { w.Err = binary.Write(w.Writer, binary.BigEndian, x) } } // WriteString writes a big endian encoded string to // the underlying io.Writer. // If an error was encountered before no data is written. func (w *BinWriter) WriteString(s string) { if w.Err == nil { w.Err = binary.Write(w.Writer, binary.BigEndian, uint32(len(s))) } if w.Err == nil { w.Err = binary.Write(w.Writer, binary.BigEndian, []byte(s)) } }