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SQL/JSON: Miscellaneous fixes and improvements

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This addresses some post-commit review comments for commits 6185c973,
de3600452, and 9425c596a0, with the following changes:

* Fix JSON_TABLE() syntax documentation to use the term
  "path_expression" for JSON path expressions instead of
  "json_path_specification" to be consistent with the other SQL/JSON
  functions.

* Fix a typo in the example code in JSON_TABLE() documentation.

* Rewrite some newly added comments in jsonpath.h.

* In JsonPathQuery(), add missing cast to int before printing an enum
  value.

Reported-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxG_e0QLCgaELrr2ZNz7AxPeGCNKAORe3fHtFCQLsH4J4Q@mail.gmail.com
This commit is contained in:
Amit Langote
2024-04-18 14:38:12 +09:00
parent c0fc075186
commit ef744ebb73
3 changed files with 9 additions and 10 deletions
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9
doc/src/sgml/func.sgml
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@ -18942,7 +18942,7 @@ where <replaceable class="parameter">json_table_column</replaceable> is:
<optional> { ERROR | NULL | EMPTY { ARRAY | OBJECT } | DEFAULT <replaceable>expression</replaceable> } ON ERROR </optional>
| <replaceable>name</replaceable> <replaceable>type</replaceable> EXISTS <optional> PATH <replaceable>path_expression</replaceable> </optional>
<optional> { ERROR | TRUE | FALSE | UNKNOWN } ON ERROR </optional>
| NESTED <optional> PATH </optional> <replaceable>json_path_specification</replaceable> <optional> AS <replaceable>json_path_name</replaceable> </optional> COLUMNS ( <replaceable>json_table_column</replaceable> <optional>, ...</optional> )
| NESTED <optional> PATH </optional> <replaceable>path_expression</replaceable> <optional> AS <replaceable>json_path_name</replaceable> </optional> COLUMNS ( <replaceable>json_table_column</replaceable> <optional>, ...</optional> )
</synopsis>
<para>
@ -19083,7 +19083,7 @@ where <replaceable class="parameter">json_table_column</replaceable> is:
<varlistentry>
<term>
<literal>NESTED <optional> PATH </optional></literal> <replaceable>json_path_specification</replaceable> <optional> <literal>AS</literal> <replaceable>json_path_name</replaceable> </optional>
<literal>NESTED <optional> PATH </optional></literal> <replaceable>path_expression</replaceable> <optional> <literal>AS</literal> <replaceable>json_path_name</replaceable> </optional>
<literal>COLUMNS</literal> ( <replaceable>json_table_column</replaceable> <optional>, ...</optional> )
</term>
<listitem>
@ -19315,8 +19315,9 @@ SELECT * FROM JSON_TABLE (
"books":
[{"name": "Mystery", "authors": [{"name": "Brown Dan"}]},
{"name": "Wonder", "authors": [{"name": "Jun Murakami"}, {"name":"Craig Doe"}]}]
}}'::json, '$.favs[*]'
COLUMNS (user_id FOR ORDINALITY,
}}'::json, '$.favorites[*]'
COLUMNS (
user_id FOR ORDINALITY,
NESTED '$.movies[*]'
COLUMNS (
movie_id FOR ORDINALITY,