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Posted to commits@flink.apache.org by tw...@apache.org on 2016/08/31 08:45:53 UTC
flink git commit: [hotfix] [table] Add docs about SQL's lexical policy
Repository: flink
Updated Branches:
refs/heads/master b7d83899a -> db919a585
[hotfix] [table] Add docs about SQL's lexical policy
Project: http://git-wip-us.apache.org/repos/asf/flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/db919a58
Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/db919a58
Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/db919a58
Branch: refs/heads/master
Commit: db919a58584e9aafe0d3b8b738a9bd17361b05b5
Parents: b7d8389
Author: twalthr <tw...@apache.org>
Authored: Wed Aug 31 10:45:26 2016 +0200
Committer: twalthr <tw...@apache.org>
Committed: Wed Aug 31 10:45:26 2016 +0200
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docs/dev/table_api.md | 6 ++++++
1 file changed, 6 insertions(+)
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http://git-wip-us.apache.org/repos/asf/flink/blob/db919a58/docs/dev/table_api.md
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diff --git a/docs/dev/table_api.md b/docs/dev/table_api.md
index 8ca602d..543945c 100644
--- a/docs/dev/table_api.md
+++ b/docs/dev/table_api.md
@@ -1165,6 +1165,12 @@ groupItem:
```
+For a better definition of SQL queries within a Java String, Flink SQL uses a lexical policy similar to Java:
+
+- The case of identifiers is preserved whether or not they are quoted.
+- After which, identifiers are matched case-sensitively.
+- Unlike Java, back-ticks allow identifiers to contain non-alphanumeric characters (e.g. <code>"SELECT a AS `my field` FROM t"</code>).
+
{% top %}