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Add support for restrictive RLS policies

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We have had support for restrictive RLS policies since 9.5, but they
were only available through extensions which use the appropriate hooks.
This adds support into the grammer, catalog, psql and pg_dump for
restrictive RLS policies, thus reducing the cases where an extension is
necessary.

In passing, also move away from using "AND"d and "OR"d in comments.
As pointed out by Alvaro, it's not really appropriate to attempt
to make verbs out of "AND" and "OR", so reword those comments which
attempted to.

Reviewed By: Jeevan Chalke, Dean Rasheed
Discussion: https://postgr.es/m/20160901063404.GY4028@tamriel.snowman.net
This commit is contained in:
Stephen Frost
2016-12-05 15:50:55 -05:00
parent 2bbdc6875d
commit 093129c9d9
21 changed files with 667 additions and 152 deletions
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29
src/bin/psql/tab-complete.c
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@@ -2162,9 +2162,15 @@ psql_completion(const char *text, int start, int end)
/* Complete "CREATE POLICY <name> ON <table>" */
else if (Matches4("CREATE", "POLICY", MatchAny, "ON"))
COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_tables, NULL);
/* Complete "CREATE POLICY <name> ON <table> FOR|TO|USING|WITH CHECK" */
/* Complete "CREATE POLICY <name> ON <table> AS|FOR|TO|USING|WITH CHECK" */
else if (Matches5("CREATE", "POLICY", MatchAny, "ON", MatchAny))
COMPLETE_WITH_LIST4("FOR", "TO", "USING (", "WITH CHECK (");
COMPLETE_WITH_LIST5("AS", "FOR", "TO", "USING (", "WITH CHECK (");
/* CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE */
else if (Matches6("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS"))
COMPLETE_WITH_LIST2("PERMISSIVE", "RESTRICTIVE");
/* CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE FOR|TO|USING|WITH CHECK */
else if (Matches7("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny))
COMPLETE_WITH_LIST4("FOR", "TO", "USING", "WITH CHECK");
/* CREATE POLICY <name> ON <table> FOR ALL|SELECT|INSERT|UPDATE|DELETE */
else if (Matches6("CREATE", "POLICY", MatchAny, "ON", MatchAny, "FOR"))
COMPLETE_WITH_LIST5("ALL", "SELECT", "INSERT", "UPDATE", "DELETE");
@@ -2183,6 +2189,25 @@ psql_completion(const char *text, int start, int end)
/* Complete "CREATE POLICY <name> ON <table> USING (" */
else if (Matches6("CREATE", "POLICY", MatchAny, "ON", MatchAny, "USING"))
COMPLETE_WITH_CONST("(");
/* CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE FOR ALL|SELECT|INSERT|UPDATE|DELETE */
else if (Matches8("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny, "FOR"))
COMPLETE_WITH_LIST5("ALL", "SELECT", "INSERT", "UPDATE", "DELETE");
/* Complete "CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE FOR INSERT TO|WITH CHECK" */
else if (Matches9("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny, "FOR", "INSERT"))
COMPLETE_WITH_LIST2("TO", "WITH CHECK (");
/* Complete "CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE FOR SELECT|DELETE TO|USING" */
else if (Matches9("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny, "FOR", "SELECT|DELETE"))
COMPLETE_WITH_LIST2("TO", "USING (");
/* CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE FOR ALL|UPDATE TO|USING|WITH CHECK */
else if (Matches9("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny, "FOR", "ALL|UPDATE"))
COMPLETE_WITH_LIST3("TO", "USING (", "WITH CHECK (");
/* Complete "CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE TO <role>" */
else if (Matches8("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny, "TO"))
COMPLETE_WITH_QUERY(Query_for_list_of_grant_roles);
/* Complete "CREATE POLICY <name> ON <table> AS PERMISSIVE|RESTRICTIVE USING (" */
else if (Matches8("CREATE", "POLICY", MatchAny, "ON", MatchAny, "AS", MatchAny, "USING"))
COMPLETE_WITH_CONST("(");
/* CREATE RULE */
/* Complete "CREATE RULE <sth>" with "AS ON" */