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164 A tool that drops records (does restriction) according to their match to given regular expression. |
164 A tool that drops records (does restriction) according to their match to given regular expression. |
165 Relation and attribute name are also specified as a regular expression. |
165 Relation and attribute name are also specified as a regular expression. |
166 Thus single <code>relpipe-tr-grep</code> run may modify multiple relations or do match on multiple attributes. |
166 Thus single <code>relpipe-tr-grep</code> run may modify multiple relations or do match on multiple attributes. |
167 </p> |
167 </p> |
168 |
168 |
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169 <h3>relpipe-tr-cut</h3> |
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170 |
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171 <p> |
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172 A tool that drops or multiplies attributes or changes their order (does projection) according to their name match to given regular expression. |
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173 Relation name is also specified as a regular expression and there might be multiple regexes specifying desired attributes. |
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174 Thus single <code>relpipe-tr-cut</code> run may modify multiple relations or pick multiple attributes from them. |
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175 </p> |
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176 |
169 </text> |
177 </text> |
170 |
178 |
171 </stránka> |
179 </stránka> |