Mercurial > gemma
annotate schema/isrs.sql @ 3368:70605404f37d
fa_lnwl: prototypical diagram added
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Wed, 22 May 2019 11:00:25 +0200 |
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1 -- This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 -- without warranty, see README.md and license for details. |
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3 |
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4 -- SPDX-License-Identifier: AGPL-3.0-or-later |
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5 -- License-Filename: LICENSES/AGPL-3.0.txt |
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6 |
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7 -- Copyright (C) 2018, 2019 by via donau |
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8 -- – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 -- Software engineering by Intevation GmbH |
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10 |
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11 -- Author(s): |
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12 -- * Tom Gottfried <tom@intevation.de> |
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13 |
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14 -- |
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15 -- Types and functions for ISRS location codes |
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16 -- |
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17 |
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18 BEGIN; |
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19 |
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20 CREATE TABLE countries ( |
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21 country_code char(2) PRIMARY KEY -- ISO 3166 ALPHA-2 code |
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22 ); |
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23 |
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24 CREATE OR REPLACE FUNCTION is_country(code char) RETURNS boolean |
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25 AS $$ |
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26 SELECT EXISTS(SELECT 1 FROM countries WHERE country_code = code) |
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27 $$ |
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28 LANGUAGE sql |
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29 STABLE PARALLEL SAFE; |
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30 |
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31 -- |
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32 -- Types |
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33 -- |
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34 |
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35 -- Composite type: UN/LOCODE, fairway section, object reference, hectometre. |
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36 -- See RIS-Index Encoding Guide |
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37 CREATE TYPE isrs_base AS ( |
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38 country_code char(2), -- ISO 3166 country code |
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39 locode char(3), -- without the country code: |
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40 -- http://www.unece.org/cefact/locode/welcome.html |
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41 fairway_section char(5), |
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42 orc char(5), -- Object Reference Code |
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43 hectometre int |
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44 ); |
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45 |
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46 CREATE DOMAIN isrs AS isrs_base |
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47 CHECK (is_country((VALUE).country_code)) |
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48 CHECK ((VALUE).hectometre BETWEEN 0 AND 99999); |
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49 |
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50 CREATE TYPE isrsrange AS RANGE ( |
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51 subtype = isrs |
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52 ); |
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53 |
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54 -- |
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55 -- Functions |
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56 -- |
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57 |
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58 CREATE OR REPLACE FUNCTION isrs_fromText( |
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59 isrs_text varchar |
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60 ) |
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61 RETURNS isrs |
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62 AS $$ |
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63 DECLARE |
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64 isrs_len CONSTANT int = 20; |
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65 BEGIN |
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66 IF char_length(isrs_text) <> isrs_len |
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67 THEN |
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68 RAISE 'ISRS location code must be % characters long', isrs_len |
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69 USING ERRCODE = 'invalid_parameter_value', |
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70 DETAIL = 'Failing value: ' || isrs_text; |
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71 ELSE |
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72 RETURN CAST(( |
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73 substring(isrs_text from 1 for 2), |
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74 substring(isrs_text from 3 for 3), |
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75 substring(isrs_text from 6 for 5), |
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76 substring(isrs_text from 11 for 5), |
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77 CAST(substring(isrs_text from 16 for 5) AS int)) |
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78 AS isrs); |
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79 END IF; |
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80 END; |
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81 $$ |
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82 LANGUAGE plpgsql; |
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83 |
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84 CREATE OR REPLACE FUNCTION isrs_asText( |
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85 code isrs |
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86 ) |
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87 RETURNS text |
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88 AS $$ |
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89 SELECT code.country_code |
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90 || code.locode |
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91 || code.fairway_section |
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92 || code.orc |
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93 || lpad(CAST(code.hectometre AS text), 5, '0'); |
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94 $$ |
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95 LANGUAGE sql |
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96 IMMUTABLE PARALLEL SAFE; |
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97 |
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98 COMMIT; |