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Merge pull request #897 from astroidex/master
new help texts for operators
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- +13 −0 resources/function_help/AND
- +13 −0 resources/function_help/ILIKE
- +18 −0 resources/function_help/IS
- +13 −0 resources/function_help/LIKE
- +14 −0 resources/function_help/NOT
- +13 −0 resources/function_help/OR
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| <h3>AND logical operator</h3> | ||
| Returns 1 when condition a and b are true. | ||
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| <h4>Syntax</h4> | ||
| <pre> condition a AND condition b </pre> | ||
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| <h4>Arguments</h4> | ||
| None | ||
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| <h4>Example</h4> | ||
| <pre> 4 = 2+2 AND 1 = 1 → returns 1 </pre> | ||
| <pre> 4 = 2+2 AND 1 = 2 → returns 0 </pre> | ||
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| <h3>LIKE expression</h3> | ||
| Returns 1 if the first parameter matches case-insensitive the supplied pattern. ILIKE can be used instead of LIKE to make the match case-insensitive. Works with numbers also. | ||
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| <h4>Syntax</h4> | ||
| <pre>string/number LIKE pattern</pre> | ||
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| <h4>Arguments</h4> | ||
| None | ||
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| <h4>Example</h4> | ||
| <pre> 'A' ILIKE 'A' → returns 1 </pre> | ||
| <pre> 'A' ILIKE 'a' → returns 1 </pre> | ||
| <pre> 'A' ILIKE 'B' → returns 0 </pre> |
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| <h3>IS expression</h3> | ||
| Returns 1 if a is the same as b. | ||
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| <h4>Syntax</h4> | ||
| <pre>a is b</pre> | ||
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| <h4>Arguments</h4> | ||
| None | ||
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| <h4>Example</h4> | ||
| <pre> 'A' IS 'A' → returns 1 </pre> | ||
| <pre> 'A' IS 'a' → returns 0 </pre> | ||
| <pre> 4 IS 4 → returns 1 </pre> | ||
| <pre> 4 IS 2+2 → returns 1 </pre> | ||
| <pre> 4 IS 2 → returns 0 </pre> | ||
| <pre> 4 IS 2 → returns 0 </pre> | ||
| <pre> $geometry IS NULL → returns 0, if your geometry is not NULL</pre> | ||
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| <h3>LIKE expression</h3> | ||
| Returns 1 if the first parameter matches the supplied pattern. Works with numbers also. | ||
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| <h4>Syntax</h4> | ||
| <pre>string/number LIKE pattern</pre> | ||
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| <h4>Arguments</h4> | ||
| None | ||
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| <h4>Example</h4> | ||
| <pre> 'A' LIKE 'A' → returns 1 </pre> | ||
| <pre> 'A' LIKE 'a' → returns 0 </pre> | ||
| <pre> 'A' LIKE 'B' → returns 0 </pre> |
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| <h3>NOT</h3> | ||
| Returns 1 if a is not the same as b. | ||
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| <h4>Syntax</h4> | ||
| <pre> a NOT b </pre> | ||
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| <h4>Arguments</h4> | ||
| None | ||
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| <h4>Example</h4> | ||
| <pre> 'a' IS NOT 'b' → returns 1 </pre> | ||
| <pre> 'a' IS NOT 'a' → returns 0 </pre> | ||
| <pre> 4 IS NOT 2+2 → returns 0 </pre> | ||
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| <h3>OR logical operator</h3> | ||
| Returns 1 when condition a or b is true. | ||
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| <h4>Syntax</h4> | ||
| <pre> condition a OR condition b </pre> | ||
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| <h4>Arguments</h4> | ||
| None | ||
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| <h4>Example</h4> | ||
| <pre> 4 = 2+2 OR 1 = 1 → returns 1 </pre> | ||
| <pre> 4 = 2+2 OR 1 = 2 → returns 1 </pre> | ||
| <pre> 4 = 2 OR 1 = 2 → returns 0 </pre> |