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author | Tom Lane | 2008-01-13 17:58:54 +0000 |
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committer | Tom Lane | 2008-01-13 17:58:54 +0000 |
commit | 72a0333c7898fdbcdb13317ad6c8a05810b45d87 (patch) | |
tree | c42f26ffab007bfa12809b1ab68bc72a8a55fd8e | |
parent | 4315ba43d70540368fec5b44da82a000ab300de4 (diff) |
Add note pointing out that read-only commands no longer consume
command IDs.
-rw-r--r-- | doc/src/sgml/ddl.sgml | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index 8ed0e48dfd..00aac8d3c9 100644 --- a/doc/src/sgml/ddl.sgml +++ b/doc/src/sgml/ddl.sgml @@ -1034,12 +1034,14 @@ CREATE TABLE order_items ( </para> <para> - Command - identifiers are also 32-bit quantities. This creates a hard limit + Command identifiers are also 32-bit quantities. This creates a hard limit of 2<superscript>32</> (4 billion) <acronym>SQL</acronym> commands within a single transaction. In practice this limit is not a problem — note that the limit is on number of <acronym>SQL</acronym> commands, not number of rows processed. + Also, as of <productname>PostgreSQL</productname> 8.3, only commands + that actually modify the database contents will consume a command + identifier. </para> </sect1> |