diff options
Diffstat (limited to 'contrib/btree_gist/btree_text.c')
| -rw-r--r-- | contrib/btree_gist/btree_text.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_text.c b/contrib/btree_gist/btree_text.c new file mode 100644 index 0000000..8019d11 --- /dev/null +++ b/contrib/btree_gist/btree_text.c @@ -0,0 +1,241 @@ +/* + * contrib/btree_gist/btree_text.c + */ +#include "postgres.h" + +#include "btree_gist.h" +#include "btree_utils_var.h" +#include "utils/builtins.h" + +/* +** Text ops +*/ +PG_FUNCTION_INFO_V1(gbt_text_compress); +PG_FUNCTION_INFO_V1(gbt_bpchar_compress); +PG_FUNCTION_INFO_V1(gbt_text_union); +PG_FUNCTION_INFO_V1(gbt_text_picksplit); +PG_FUNCTION_INFO_V1(gbt_text_consistent); +PG_FUNCTION_INFO_V1(gbt_bpchar_consistent); +PG_FUNCTION_INFO_V1(gbt_text_penalty); +PG_FUNCTION_INFO_V1(gbt_text_same); + + +/* define for comparison */ + +static bool +gbt_textgt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo) +{ + return DatumGetBool(DirectFunctionCall2Coll(text_gt, + collation, + PointerGetDatum(a), + PointerGetDatum(b))); +} + +static bool +gbt_textge(const void *a, const void *b, Oid collation, FmgrInfo *flinfo) +{ + return DatumGetBool(DirectFunctionCall2Coll(text_ge, + collation, + PointerGetDatum(a), + PointerGetDatum(b))); +} + +static bool +gbt_texteq(const void *a, const void *b, Oid collation, FmgrInfo *flinfo) +{ + return DatumGetBool(DirectFunctionCall2Coll(texteq, + collation, + PointerGetDatum(a), + PointerGetDatum(b))); +} + +static bool +gbt_textle(const void *a, const void *b, Oid collation, FmgrInfo *flinfo) +{ + return DatumGetBool(DirectFunctionCall2Coll(text_le, + collation, + PointerGetDatum(a), + PointerGetDatum(b))); +} + +static bool +gbt_textlt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo) +{ + return DatumGetBool(DirectFunctionCall2Coll(text_lt, + collation, + PointerGetDatum(a), + PointerGetDatum(b))); +} + +static int32 +gbt_textcmp(const void *a, const void *b, Oid collation, FmgrInfo *flinfo) +{ + return DatumGetInt32(DirectFunctionCall2Coll(bttextcmp, + collation, + PointerGetDatum(a), + PointerGetDatum(b))); +} + +static gbtree_vinfo tinfo = +{ + gbt_t_text, + 0, + false, + gbt_textgt, + gbt_textge, + gbt_texteq, + gbt_textle, + gbt_textlt, + gbt_textcmp, + NULL +}; + + +/************************************************** + * Text ops + **************************************************/ + + +Datum +gbt_text_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + if (tinfo.eml == 0) + { + tinfo.eml = pg_database_encoding_max_length(); + } + + PG_RETURN_POINTER(gbt_var_compress(entry, &tinfo)); +} + +Datum +gbt_bpchar_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + GISTENTRY *retval; + + if (tinfo.eml == 0) + { + tinfo.eml = pg_database_encoding_max_length(); + } + + if (entry->leafkey) + { + + Datum d = DirectFunctionCall1(rtrim1, entry->key); + GISTENTRY trim; + + gistentryinit(trim, d, + entry->rel, entry->page, + entry->offset, true); + retval = gbt_var_compress(&trim, &tinfo); + } + else + retval = entry; + + PG_RETURN_POINTER(retval); +} + + + +Datum +gbt_text_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + void *query = (void *) DatumGetTextP(PG_GETARG_DATUM(1)); + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + + /* Oid subtype = PG_GETARG_OID(3); */ + bool *recheck = (bool *) PG_GETARG_POINTER(4); + bool retval; + GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key); + GBT_VARKEY_R r = gbt_var_key_readable(key); + + /* All cases served by this function are exact */ + *recheck = false; + + if (tinfo.eml == 0) + { + tinfo.eml = pg_database_encoding_max_length(); + } + + retval = gbt_var_consistent(&r, query, strategy, PG_GET_COLLATION(), + GIST_LEAF(entry), &tinfo, fcinfo->flinfo); + + PG_RETURN_BOOL(retval); +} + + +Datum +gbt_bpchar_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + void *query = (void *) DatumGetTextP(PG_GETARG_DATUM(1)); + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + + /* Oid subtype = PG_GETARG_OID(3); */ + bool *recheck = (bool *) PG_GETARG_POINTER(4); + bool retval; + GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key); + GBT_VARKEY_R r = gbt_var_key_readable(key); + void *trim = (void *) DatumGetPointer(DirectFunctionCall1(rtrim1, PointerGetDatum(query))); + + /* All cases served by this function are exact */ + *recheck = false; + + if (tinfo.eml == 0) + { + tinfo.eml = pg_database_encoding_max_length(); + } + + retval = gbt_var_consistent(&r, trim, strategy, PG_GET_COLLATION(), + GIST_LEAF(entry), &tinfo, fcinfo->flinfo); + PG_RETURN_BOOL(retval); +} + + +Datum +gbt_text_union(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + int32 *size = (int *) PG_GETARG_POINTER(1); + + PG_RETURN_POINTER(gbt_var_union(entryvec, size, PG_GET_COLLATION(), + &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_text_picksplit(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1); + + gbt_var_picksplit(entryvec, v, PG_GET_COLLATION(), + &tinfo, fcinfo->flinfo); + PG_RETURN_POINTER(v); +} + +Datum +gbt_text_same(PG_FUNCTION_ARGS) +{ + Datum d1 = PG_GETARG_DATUM(0); + Datum d2 = PG_GETARG_DATUM(1); + bool *result = (bool *) PG_GETARG_POINTER(2); + + *result = gbt_var_same(d1, d2, PG_GET_COLLATION(), &tinfo, fcinfo->flinfo); + PG_RETURN_POINTER(result); +} + + +Datum +gbt_text_penalty(PG_FUNCTION_ARGS) +{ + GISTENTRY *o = (GISTENTRY *) PG_GETARG_POINTER(0); + GISTENTRY *n = (GISTENTRY *) PG_GETARG_POINTER(1); + float *result = (float *) PG_GETARG_POINTER(2); + + PG_RETURN_POINTER(gbt_var_penalty(result, o, n, PG_GET_COLLATION(), + &tinfo, fcinfo->flinfo)); +} |