Use "C" collation in sys.sp_statistics_view

Signed-off-by: Sumit Jaiswal <[email protected]>

contrib/babelfishpg_tsql/sql/babelfishpg_tsql.sql

@@ -1199,7 +1199,7 @@ CAST(t1.relpages AS int) AS PAGES,
 CAST(NULL AS sys.varchar(128)) AS FILTER_CONDITION
 FROM pg_catalog.pg_class t1
     JOIN sys.schemas s1 ON s1.schema_id = t1.relnamespace
-    JOIN information_schema_tsql.columns t3 ON (t1.relname = t3."TABLE_NAME" COLLATE sys.database_default AND s1.name = t3."TABLE_SCHEMA")
+    JOIN information_schema_tsql.columns t3 ON (t1.relname = t3."TABLE_NAME" COLLATE C AND s1.name = t3."TABLE_SCHEMA")
     , generate_series(0,31) seq -- SQL server has max 32 columns per index
 UNION
 SELECT
@@ -1230,7 +1230,7 @@ CAST(NULL AS sys.varchar(128)) AS FILTER_CONDITION
 FROM pg_catalog.pg_class t1
     JOIN sys.schemas s1 ON s1.schema_id = t1.relnamespace
     JOIN pg_catalog.pg_roles t3 ON t1.relowner = t3.oid
-    JOIN information_schema_tsql.columns t4 ON (t1.relname = t4."TABLE_NAME" COLLATE sys.database_default AND s1.name = t4."TABLE_SCHEMA")
+    JOIN information_schema_tsql.columns t4 ON (t1.relname = t4."TABLE_NAME" COLLATE C AND s1.name = t4."TABLE_SCHEMA")
 	JOIN (pg_catalog.pg_index t5 JOIN
 		pg_catalog.pg_class t6 ON t5.indexrelid = t6.oid) ON t1.oid = t5.indrelid
 	JOIN pg_catalog.pg_namespace nsp ON (t1.relnamespace = nsp.oid)

contrib/babelfishpg_tsql/sql/upgrades/babelfishpg_tsql--3.3.0--3.4.0.sql

@@ -1188,6 +1188,64 @@ END;
 $body$
 LANGUAGE plpgsql IMMUTABLE;
 
+CREATE OR REPLACE VIEW sys.sp_statistics_view AS
+SELECT
+CAST(t3."TABLE_CATALOG" AS sys.sysname) AS TABLE_QUALIFIER,
+CAST(t3."TABLE_SCHEMA" AS sys.sysname) AS TABLE_OWNER,
+CAST(t3."TABLE_NAME" AS sys.sysname) AS TABLE_NAME,
+CAST(NULL AS smallint) AS NON_UNIQUE,
+CAST(NULL AS sys.sysname) AS INDEX_QUALIFIER,
+CAST(NULL AS sys.sysname) AS INDEX_NAME,
+CAST(0 AS smallint) AS TYPE,
+CAST(NULL AS smallint) AS SEQ_IN_INDEX,
+CAST(NULL AS sys.sysname) AS COLUMN_NAME,
+CAST(NULL AS sys.varchar(1)) AS COLLATION,
+CAST(t1.reltuples AS int) AS CARDINALITY,
+CAST(t1.relpages AS int) AS PAGES,
+CAST(NULL AS sys.varchar(128)) AS FILTER_CONDITION
+FROM pg_catalog.pg_class t1
+    JOIN sys.schemas s1 ON s1.schema_id = t1.relnamespace
+    JOIN information_schema_tsql.columns t3 ON (t1.relname = t3."TABLE_NAME" COLLATE C AND s1.name = t3."TABLE_SCHEMA")
+    , generate_series(0,31) seq -- SQL server has max 32 columns per index
+UNION
+SELECT
+CAST(t4."TABLE_CATALOG" AS sys.sysname) AS TABLE_QUALIFIER,
+CAST(t4."TABLE_SCHEMA" AS sys.sysname) AS TABLE_OWNER,
+CAST(t4."TABLE_NAME" AS sys.sysname) AS TABLE_NAME,
+CASE
+WHEN t5.indisunique = 't' THEN CAST(0 AS smallint)
+ELSE CAST(1 AS smallint)
+END AS NON_UNIQUE,
+CAST(t1.relname AS sys.sysname) AS INDEX_QUALIFIER,
+-- the index name created by CREATE INDEX is re-mapped, find it (by checking
+-- the ones not in pg_constraint) and restoring it back before display
+CASE 
+WHEN t8.oid > 0 THEN CAST(t6.relname AS sys.sysname)
+ELSE CAST(SUBSTRING(t6.relname,1,LENGTH(t6.relname)-32-LENGTH(t1.relname)) AS sys.sysname) 
+END AS INDEX_NAME,
+CASE
+WHEN t5.indisclustered = 't' THEN CAST(1 AS smallint)
+ELSE CAST(3 AS smallint)
+END AS TYPE,
+CAST(seq + 1 AS smallint) AS SEQ_IN_INDEX,
+CAST(t4."COLUMN_NAME" AS sys.sysname) AS COLUMN_NAME,
+CAST('A' AS sys.varchar(1)) AS COLLATION,
+CAST(t7.n_distinct AS int) AS CARDINALITY,
+CAST(0 AS int) AS PAGES, --not supported
+CAST(NULL AS sys.varchar(128)) AS FILTER_CONDITION
+FROM pg_catalog.pg_class t1
+    JOIN sys.schemas s1 ON s1.schema_id = t1.relnamespace
+    JOIN pg_catalog.pg_roles t3 ON t1.relowner = t3.oid
+    JOIN information_schema_tsql.columns t4 ON (t1.relname = t4."TABLE_NAME" COLLATE C AND s1.name = t4."TABLE_SCHEMA")
+	JOIN (pg_catalog.pg_index t5 JOIN
+		pg_catalog.pg_class t6 ON t5.indexrelid = t6.oid) ON t1.oid = t5.indrelid
+	JOIN pg_catalog.pg_namespace nsp ON (t1.relnamespace = nsp.oid)
+	LEFT JOIN pg_catalog.pg_stats t7 ON (t1.relname = t7.tablename AND t7.schemaname = nsp.nspname)
+	LEFT JOIN pg_catalog.pg_constraint t8 ON t5.indexrelid = t8.conindid
+    , generate_series(0,31) seq -- SQL server has max 32 columns per index
+WHERE CAST(t4."ORDINAL_POSITION" AS smallint) = ANY (t5.indkey)
+    AND CAST(t4."ORDINAL_POSITION" AS smallint) = t5.indkey[seq];
+GRANT SELECT on sys.sp_statistics_view TO PUBLIC;
 
 -- This is a temporary procedure which is called during upgrade to update guest schema
 -- for the guest users in the already existing databases