add GUCs

cstore.c

@@ -17,10 +17,65 @@
 #include <unistd.h>
 
 #include "miscadmin.h"
+#include "utils/guc.h"
 #include "utils/rel.h"
 
 #include "cstore.h"
 
+int cstore_compression = DEFAULT_COMPRESSION_TYPE;
+int cstore_stripe_row_count = DEFAULT_STRIPE_ROW_COUNT;
+int cstore_block_row_count = DEFAULT_BLOCK_ROW_COUNT;
+
+static const struct config_enum_entry cstore_compression_options[] =
+{
+	{"none", COMPRESSION_NONE, false},
+	{"pglz", COMPRESSION_PG_LZ, false},
+	{NULL, 0, false}
+};
+
+void
+cstore_init()
+{
+	DefineCustomEnumVariable("cstore.compression",
+							 "Sets the maximum number of statements tracked by pg_stat_statements.",
+							 NULL,
+							 &cstore_compression,
+							 DEFAULT_COMPRESSION_TYPE,
+							 cstore_compression_options,
+							 PGC_POSTMASTER,
+							 0,
+							 NULL,
+							 NULL,
+							 NULL);
+
+	DefineCustomIntVariable("cstore.stripe_row_count",
+							"Sets the maximum number of statements tracked by pg_stat_statements.",
+							NULL,
+							&cstore_stripe_row_count,
+							DEFAULT_STRIPE_ROW_COUNT,
+							STRIPE_ROW_COUNT_MINIMUM,
+							STRIPE_ROW_COUNT_MAXIMUM,
+							PGC_USERSET,
+							0,
+							NULL,
+							NULL,
+							NULL);
+
+	DefineCustomIntVariable("cstore.block_row_count",
+							"Sets the maximum number of statements tracked by pg_stat_statements.",
+							NULL,
+							&cstore_block_row_count,
+							DEFAULT_BLOCK_ROW_COUNT,
+							BLOCK_ROW_COUNT_MINIMUM,
+							BLOCK_ROW_COUNT_MAXIMUM,
+							PGC_USERSET,
+							0,
+							NULL,
+							NULL,
+							NULL);
+}
+
+
 /* ParseCompressionType converts a string to a compression type. */
 CompressionType
 ParseCompressionType(const char *compressionTypeString)

cstore.h

@@ -249,6 +249,12 @@ typedef struct TableWriteState
 	StringInfo compressionBuffer;
 } TableWriteState;
 
+extern int cstore_compression;
+extern int cstore_stripe_row_count;
+extern int cstore_block_row_count;
+
+extern void cstore_init(void);
+
 extern CompressionType ParseCompressionType(const char *compressionTypeString);
 extern void InitializeCStoreTableFile(Oid relationId, Relation relation,
 									  CStoreOptions *cstoreOptions);

mod.c

@@ -15,6 +15,7 @@
 
 #include "fmgr.h"
 
+#include "cstore.h"
 #include "mod.h"
 
 #ifdef USE_TABLEAM
@@ -30,6 +31,8 @@ PG_MODULE_MAGIC;
 void
 _PG_init(void)
 {
+	cstore_init();
+
 #ifdef USE_TABLEAM
 	cstore_tableam_init();
 #endif