forked from TrueCloudLab/frostfs-sdk-go
19 lines
805 B
Go
19 lines
805 B
Go
// Package policy provides facilities for creating policy from SQL-like language.
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// ANTLRv4 grammar is provided in `parser/Query.g4` and `parser/QueryLexer.g4`.
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//
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// Current limitations:
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// 1. Filters must be defined before they are used.
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// This requirement may be relaxed in future.
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// 2. Keywords are key-sensitive. This can be changed if necessary
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// https://github.com/antlr/antlr4/blob/master/doc/case-insensitive-lexing.md .
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//
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// Example query:
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// REP 1 IN SPB
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// REP 2 IN Americas
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// CBF 4
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// SELECT 1 IN City FROM SPBSSD AS SPB
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// SELECT 2 IN SAME City FROM Americas AS Americas
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// FILTER SSD EQ true AS IsSSD
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// FILTER @IsSSD AND Country EQ "RU" AND City EQ "St.Petersburg" AS SPBSSD
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// FILTER 'Continent' EQ 'North America' OR Continent EQ 'South America' AS Americas
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package policy
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