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-rw-r--r--contrib/btree_gist/btree_utils_var.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_utils_var.h b/contrib/btree_gist/btree_utils_var.h
new file mode 100644
index 0000000..2f8def6
--- /dev/null
+++ b/contrib/btree_gist/btree_utils_var.h
@@ -0,0 +1,72 @@
+/*
+ * contrib/btree_gist/btree_utils_var.h
+ */
+#ifndef __BTREE_UTILS_VAR_H__
+#define __BTREE_UTILS_VAR_H__
+
+#include "access/gist.h"
+#include "btree_gist.h"
+#include "mb/pg_wchar.h"
+
+/* Variable length key */
+typedef bytea GBT_VARKEY;
+
+/* Better readable key */
+typedef struct
+{
+ bytea *lower,
+ *upper;
+} GBT_VARKEY_R;
+
+/*
+ * type description
+ */
+typedef struct
+{
+
+ /* Attribs */
+
+ enum gbtree_type t; /* data type */
+ int32 eml; /* cached pg_database_encoding_max_length (0:
+ * undefined) */
+ bool trnc; /* truncate (=compress) key */
+
+ /* Methods */
+
+ bool (*f_gt) (const void *, const void *, Oid, FmgrInfo *); /* greater than */
+ bool (*f_ge) (const void *, const void *, Oid, FmgrInfo *); /* greater equal */
+ bool (*f_eq) (const void *, const void *, Oid, FmgrInfo *); /* equal */
+ bool (*f_le) (const void *, const void *, Oid, FmgrInfo *); /* less equal */
+ bool (*f_lt) (const void *, const void *, Oid, FmgrInfo *); /* less than */
+ int32 (*f_cmp) (const void *, const void *, Oid, FmgrInfo *); /* compare */
+ GBT_VARKEY *(*f_l2n) (GBT_VARKEY *, FmgrInfo *flinfo); /* convert leaf to node */
+} gbtree_vinfo;
+
+
+
+extern GBT_VARKEY_R gbt_var_key_readable(const GBT_VARKEY *k);
+
+extern GBT_VARKEY *gbt_var_key_copy(const GBT_VARKEY_R *u);
+
+extern GISTENTRY *gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo *tinfo);
+
+extern GBT_VARKEY *gbt_var_union(const GistEntryVector *entryvec, int32 *size,
+ Oid collation, const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
+
+extern bool gbt_var_same(Datum d1, Datum d2, Oid collation,
+ const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
+
+extern float *gbt_var_penalty(float *res, const GISTENTRY *o, const GISTENTRY *n,
+ Oid collation, const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
+
+extern bool gbt_var_consistent(GBT_VARKEY_R *key, const void *query,
+ StrategyNumber strategy, Oid collation, bool is_leaf,
+ const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
+
+extern GIST_SPLITVEC *gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
+ Oid collation, const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
+
+extern void gbt_var_bin_union(Datum *u, GBT_VARKEY *e, Oid collation,
+ const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
+
+#endif