Mercurial > gemma
annotate pkg/imports/sec.go @ 4306:2336f75637d1
sections: Use blown up axis as geometry. (Nicked from current stretches)
As using the waterway area geometry just imposes another sources of
errors (and failed on me repeatedly) this change eliminates these
potential problems.
author | Sascha Wilde <wilde@intevation.de> |
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date | Mon, 02 Sep 2019 18:26:12 +0200 |
parents | 91cb4a7b1b13 |
children | ca6a5f722471 |
rev | line source |
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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 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 |
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14 package imports |
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15 |
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16 import ( |
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17 "context" |
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18 "database/sql" |
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19 "time" |
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20 |
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21 "gemma.intevation.de/gemma/pkg/models" |
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22 ) |
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23 |
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24 // Section is a Job to create a section in the database. |
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25 type Section struct { |
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26 Name string `json:"name"` |
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27 From models.Isrs `json:"from"` |
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28 To models.Isrs `json:"to"` |
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29 Tolerance float32 `json:"tolerance"` |
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30 ObjNam string `json:"objnam"` |
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31 NObjNam *string `json:"nobjnam"` |
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32 Source string `json:"source-organization"` |
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33 Date models.Date `json:"date-info"` |
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34 } |
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35 |
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36 // SECJobKind is the import queue type identifier. |
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37 const SECJobKind JobKind = "sec" |
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38 |
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39 type secJobCreator struct{} |
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40 |
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41 func init() { RegisterJobCreator(SECJobKind, secJobCreator{}) } |
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42 |
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43 func (secJobCreator) Description() string { return "section" } |
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44 |
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45 func (secJobCreator) AutoAccept() bool { return false } |
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46 |
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47 func (secJobCreator) Create() Job { return new(Section) } |
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48 |
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49 func (secJobCreator) Depends() [2][]string { |
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50 return [2][]string{ |
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51 {"sections"}, |
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52 {"distance_marks_virtual", "waterway_axis", "waterway_area"}, |
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53 } |
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54 } |
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55 |
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56 const ( |
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57 secDeleteSQL = ` |
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58 DELETE FROM waterway.sections WHERE |
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59 staging_done AND name = ( |
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60 SELECT name |
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61 FROM waterway.sections WHERE |
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62 id = ( |
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63 SELECT key from import.track_imports |
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64 WHERE import_id = $1 AND |
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65 relation = 'waterway.sections'::regclass) |
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66 AND NOT staging_done |
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67 )` |
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68 |
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69 secStageDoneSQL = ` |
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70 UPDATE waterway.sections SET staging_done = true |
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71 WHERE id IN ( |
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72 SELECT key from import.track_imports |
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73 WHERE import_id = $1 AND |
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74 relation = 'waterway.sections'::regclass)` |
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75 |
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76 secInsertSQL = ` |
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77 WITH |
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78 bounds (b) AS (VALUES ( |
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79 ($1::char(2), |
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80 $2::char(3), |
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81 $3::char(5), |
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82 $4::char(5), |
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83 $5::int)::isrs |
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84 ), ( |
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85 ($6::char(2), |
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86 $7::char(3), |
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87 $8::char(5), |
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88 $9::char(5), |
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89 $10::int)::isrs)), |
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90 r AS (SELECT isrsrange( |
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91 (SELECT b FROM bounds ORDER BY b USING <~ FETCH FIRST ROW ONLY), |
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92 (SELECT b FROM bounds ORDER BY b USING >~ FETCH FIRST ROW ONLY)) AS r), |
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93 axs AS ( |
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94 SELECT ISRSrange_axis((SELECT r FROM r), $16::double precision) AS axs) |
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95 INSERT INTO waterway.sections ( |
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96 name, |
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97 section, |
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98 area, |
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99 objnam, |
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100 nobjnam, |
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101 date_info, |
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102 source_organization |
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103 ) VALUES ( |
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104 $11, |
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105 (SELECT r FROM r), |
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106 ST_Transform(ISRSrange_area( |
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107 (SELECT axs FROM axs), |
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108 (SELECT ST_Buffer(axs, 150) FROM axs)), |
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109 4326), |
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110 $12, |
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111 $13, |
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112 $14, |
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113 $15) |
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114 RETURNING id` |
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115 ) |
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116 |
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117 // StageDone moves the imported section out of the staging area. |
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118 func (secJobCreator) StageDone( |
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119 ctx context.Context, |
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120 tx *sql.Tx, |
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121 id int64, |
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122 ) error { |
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123 if _, err := tx.ExecContext(ctx, secDeleteSQL, id); err != nil { |
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124 return err |
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125 } |
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126 _, err := tx.ExecContext(ctx, secStageDoneSQL, id) |
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127 return err |
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128 } |
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129 |
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130 // CleanUp of a section import is a NOP. |
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131 func (*Section) CleanUp() error { return nil } |
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132 |
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133 // Do executes the actual section import. |
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134 func (sec *Section) Do( |
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135 ctx context.Context, |
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136 importID int64, |
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137 conn *sql.Conn, |
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138 feedback Feedback, |
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139 ) (interface{}, error) { |
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140 |
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141 start := time.Now() |
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142 |
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143 if sec.Date.Time.IsZero() { |
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144 sec.Date = models.Date{Time: start} |
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145 } |
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146 |
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147 feedback.Info("Storing section '%s'", sec.Name) |
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148 |
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149 tx, err := conn.BeginTx(ctx, nil) |
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150 if err != nil { |
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151 return nil, err |
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152 } |
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153 defer tx.Rollback() |
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154 |
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155 var nobjnm sql.NullString |
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156 if sec.NObjNam != nil { |
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157 nobjnm = sql.NullString{String: *sec.NObjNam, Valid: true} |
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158 } |
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159 |
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160 feedback.Info("Section from %s to %s.", sec.From.String(), sec.To.String()) |
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161 feedback.Info("Tolerance used to snap waterway axis: %g", sec.Tolerance) |
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162 |
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163 var id int64 |
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164 if err := tx.QueryRowContext( |
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165 ctx, |
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166 secInsertSQL, |
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167 sec.From.CountryCode, |
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168 sec.From.LoCode, |
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169 sec.From.FairwaySection, |
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170 sec.From.Orc, |
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171 sec.From.Hectometre, |
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172 sec.To.CountryCode, |
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173 sec.To.LoCode, |
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174 sec.To.FairwaySection, |
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175 sec.To.Orc, |
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176 sec.To.Hectometre, |
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177 sec.Name, |
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178 sec.ObjNam, |
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179 nobjnm, |
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180 sec.Date.Time, |
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181 sec.Source, |
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182 sec.Tolerance, |
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183 ).Scan(&id); err != nil { |
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184 return nil, err |
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185 } |
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186 |
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187 if err := track(ctx, tx, importID, "waterway.sections", id); err != nil { |
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188 return nil, err |
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189 } |
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190 |
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191 feedback.Info("Storing section '%s' took %s", sec.Name, time.Since(start)) |
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192 if err := tx.Commit(); err != nil { |
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193 return nil, err |
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194 } |
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195 feedback.Info("Import of section was successful") |
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196 |
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197 summary := sec // to provide full data for review |
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198 |
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199 return summary, nil |
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200 } |