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Improve readability of SQL/JSON documentation.

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Per review from Justin Pryzby.

Discussion: https://postgr.es/m/f50aca87-6b35-a1b0-2286-f815a589dd83@dunslane.net
This commit is contained in:
Andrew Dunstan 2022-04-11 11:48:40 -04:00
parent c215cc7b61
commit b46bcf7a4b
1 changed files with 14 additions and 16 deletions
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doc/src/sgml/func.sgml
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@ -17764,7 +17764,7 @@ $.* ? (@ like_regex "^\\d+$")
<sect5>
<title>Examples</title>
<para>
Construct a JSON the provided strings:
Construct JSON using the provided strings:
</para>
<screen>
SELECT JSON('{ "a" : 123, "b": [ true, "foo" ], "a" : "bar" }');
@ -17819,7 +17819,7 @@ ERROR: duplicate JSON object key value
<acronym>JSON</acronym> value.
For null input, <acronym>SQL</acronym> null
(not a <acronym>JSON</acronym> null) value is returned.
For any scalar other than a number or a Boolean the text
For any scalar other than a number or a Boolean, the text
representation will be used, with escaping as necessary to make
it a valid <acronym>JSON</acronym> string value.
For details, see
@ -17855,7 +17855,7 @@ ERROR: duplicate JSON object key value
<sect5>
<title>Examples</title>
<para>
Construct a JSON from the provided values various types:
Construct JSON scalars from the provided values of various types:
</para>
<screen>
SELECT JSON_SCALAR(123.45);
@ -18113,9 +18113,7 @@ WHERE f.did = 103;
<para>
The <function>JSON_OBJECTAGG</function> function aggregates the provided data
into a <acronym>JSON</acronym> object. You can use this function to combine values
stored in different table columns into pairs. If you specify a <command>GROUP BY</command>
or an <command>ORDER BY</command> clause, this function returns a separate JSON object
for each table row.
stored in different table columns into pairs.
</para>
</sect5>
@ -18691,7 +18689,7 @@ INSERT INTO my_films VALUES (
<title>Description</title>
<para>
<function>JSON_EXISTS</function> function checks whether the provided
The <function>JSON_EXISTS</function> function checks whether the provided
<acronym>JSON</acronym> path expression can return any <acronym>SQL/JSON</acronym> items.
</para>
</sect5>
@ -18804,7 +18802,7 @@ SELECT JSON_EXISTS(jsonb '{"a": [1,2,3]}', 'strict $.a[5]');
<title>Description</title>
<para>
<function>JSON_VALUE</function> function extracts a value from the provided
The <function>JSON_VALUE</function> function extracts a value from the provided
<acronym>JSON</acronym> data and converts it to an <acronym>SQL</acronym> scalar.
If the specified JSON path expression returns more than one
<acronym>SQL/JSON</acronym> item, an error occurs. To extract
@ -18963,7 +18961,7 @@ SELECT JSON_VALUE(jsonb '[1,2]', 'strict $[*]' DEFAULT 1 ON ERROR);
<title>Description</title>
<para>
<function>JSON_QUERY</function> function extracts an <acronym>SQL/JSON</acronym>
The <function>JSON_QUERY</function> function extracts an <acronym>SQL/JSON</acronym>
array or object from <acronym>JSON</acronym> data. This function must return
a JSON string, so if the path expression returns a scalar or multiple SQL/JSON
items, you must wrap the result using the <literal>WITH WRAPPER</literal> clause.
@ -19366,7 +19364,7 @@ where <replaceable class="parameter">json_table_column</replaceable> is:
<title>Description</title>
<para>
<function>JSON_TABLE</function> function queries <acronym>JSON</acronym> data
The <function>JSON_TABLE</function> function queries <acronym>JSON</acronym> data
and presents the results as a relational view, which can be accessed as a
regular SQL table. You can only use <function>JSON_TABLE</function> inside the
<literal>FROM</literal> clause of the <literal>SELECT</literal> statement
@ -19620,7 +19618,7 @@ where <replaceable class="parameter">json_table_column</replaceable> is:
<para>
The optional <replaceable>json_path_name</replaceable> serves as an
identifier of the provided <replaceable>json_path_specification</replaceable>.
The path name must be unique and cannot coincide with column names.
The path name must be unique and distinct from the column names.
When using the <literal>PLAN</literal> clause, you must specify the names
for all the paths, including the row pattern. Each path name can appear in
the <literal>PLAN</literal> clause only once.
@ -19820,7 +19818,7 @@ JSON_SERIALIZE (
<title>Description</title>
<para>
<function>JSON_SERIALIZE</function> function transforms a SQL/JSON value
The <function>JSON_SERIALIZE</function> function transforms a SQL/JSON value
into a character or binary string.
</para>
</sect5>
@ -19872,7 +19870,7 @@ JSON_SERIALIZE (
<sect5>
<title>Examples</title>
<para>
Construct a JSON the provided strings:
Construct serialized JSON using the provided strings:
</para>
<screen>
SELECT JSON_SERIALIZE(JSON_SCALAR('foo'));
@ -19961,7 +19959,7 @@ SELECT JSON_SERIALIZE('{"foo": "bar", "baz": [1, 2]}' RETURNING bytea);
supports the following types: <type>json</type>, <type>jsonb</type>,
<type>bytea</type>, and character string types (<type>text</type>, <type>char</type>,
<type>varchar</type>, and <type>nchar</type>).
To use other types, you must create the <literal>CAST</literal> from <type>json</type> for this type.
To use another type, you must create a cast from <type>json</type> to that type.
By default, the <type>json</type> type is returned.
</para>
<para>
@ -22392,7 +22390,7 @@ SELECT NULLIF(value, '(none)') ...
Collects all the key/value pairs into a JSON object. Key arguments
are coerced to text; value arguments are converted as per
<function>to_json</function> or <function>to_jsonb</function>
Values can be null, but not keys.
Values can be null, but keys cannot.
</para></entry>
<entry>No</entry>
</row>
@ -22449,7 +22447,7 @@ SELECT NULLIF(value, '(none)') ...
Collects all the key/value pairs into a JSON object. Key arguments
are coerced to text; value arguments are converted as per
<function>to_json</function> or <function>to_jsonb</function>.
Values can be null, but not keys.
Values can be null, but keys cannot.
If there is a duplicate key an error is thrown.
</para></entry>
<entry>No</entry>