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Add array_to_json and row_to_json functions.

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Also move the escape_json function from explain.c to json.c where it
seems to belong.

Andrew Dunstan, Reviewd by Abhijit Menon-Sen.
This commit is contained in:
Andrew Dunstan
2012-02-03 12:11:16 -05:00
parent 69e9768e7b
commit 39909d1d39
7 changed files with 579 additions and 48 deletions
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59
doc/src/sgml/func.sgml
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@ -9617,6 +9617,65 @@ table2-mapping
</sect2>
</sect1>
<sect1 id="functions-json">
<title>JSON functions</title>
<indexterm zone="datatype-json">
<primary>JSON</primary>
<secondary>Functions and operators</secondary>
</indexterm>
<para>
This section descripbes the functions that are available for creating
JSON (see <xref linkend="datatype-json">) data.
</para>
<table id="functions-json-table">
<title>JSON Support Functions</title>
<tgroup cols="4">
<thead>
<row>
<entry>Function</entry>
<entry>Description</entry>
<entry>Example</entry>
<entry>Example Result</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<indexterm>
<primary>array_to_json</primary>
</indexterm>
<literal>array_to_json(anyarray [, pretty_bool])</literal>
</entry>
<entry>
Returns the array as JSON. A Postgres multi-dimensional array
becomes a JSON array of arrays. Line feeds will be added between
dimension 1 elements if pretty_bool is true.
</entry>
<entry><literal>array_to_json('{{1,5},{99,100}}'::int[])</literal></entry>
<entry><literal>[[1,5],[99,100]]</literal></entry>
</row>
<row>
<entry>
<indexterm>
<primary>row_to_json</primary>
</indexterm>
<literal>row_to_json(record [, pretty_bool])</literal>
</entry>
<entry>
Returns the row as JSON. Line feeds will be added between level
1 elements if pretty_bool is true.
</entry>
<entry><literal>row_to_json(row(1,'foo'))</literal></entry>
<entry><literal>{"f1":1,"f2":"foo"}</literal></entry>
</row>
</tbody>
</tgroup>
</table>
</sect1>
<sect1 id="functions-sequence">
<title>Sequence Manipulation Functions</title>