mirror of
https://github.com/postgres/postgres.git
synced 2025-11-22 12:22:45 +03:00
Allow TIMESTAMP, VARCHAR, et al to be used as unquoted column names,
though alas not as unquoted function names. De-reserve a bunch of keywords that could have been in ColId rather than ColLabel all along. Per recent proposal in pgsql-patches.
This commit is contained in:
Tom Lane
@@ -88,7 +88,7 @@ cat_str(int count, ...)
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char *
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make_str(const char *str)
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{
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char * res_str = (char *)mm_alloc(strlen(str) + 1);
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char * res_str = (char *)mm_alloc(strlen(str) + 1);
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strcpy(res_str, str);
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return res_str;
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@@ -279,7 +279,7 @@ make_name(void)
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%type <str> key_match ColLabel SpecialRuleRelation ColId columnDef
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%type <str> ColConstraint ColConstraintElem drop_type Bitconst
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%type <str> OptTableElementList OptTableElement TableConstraint
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%type <str> ConstraintElem key_actions ColQualList TokenId DropSchemaStmt
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%type <str> ConstraintElem key_actions ColQualList TypeFuncId DropSchemaStmt
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%type <str> target_list target_el update_target_list alias_clause
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%type <str> update_target_el opt_id relation_name database_name
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%type <str> access_method attr_name class index_name name func_name
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@@ -288,9 +288,9 @@ make_name(void)
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%type <str> opt_indirection expr_list extract_list extract_arg
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%type <str> position_list substr_list substr_from alter_column_default
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%type <str> trim_list in_expr substr_for attr attrs drop_behavior
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%type <str> Typename SimpleTypename Generic Numeric generic opt_float opt_numeric
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%type <str> Typename SimpleTypename Generic Numeric opt_float opt_numeric
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%type <str> opt_decimal Character character opt_varying opt_charset
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%type <str> opt_collate datetime opt_timezone opt_interval table_ref
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%type <str> opt_collate opt_timezone opt_interval table_ref
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%type <str> row_expr row_descriptor row_list ConstDatetime opt_chain
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%type <str> SelectStmt into_clause OptTemp ConstraintAttributeSpec
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%type <str> opt_table opt_all sort_clause sortby_list ConstraintAttr
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@@ -324,7 +324,7 @@ make_name(void)
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%type <str> TriggerActionTime CreateTrigStmt DropPLangStmt
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%type <str> CreatePLangStmt TriggerFuncArgs TriggerFuncArg simple_select
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%type <str> ViewStmt LoadStmt CreatedbStmt createdb_opt_item
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%type <str> createdb_opt_list opt_encoding OptInherit Geometric
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%type <str> createdb_opt_list opt_encoding OptInherit
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%type <str> DropdbStmt ClusterStmt grantee RevokeStmt Bit bit
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%type <str> GrantStmt privileges operation_commalist operation PosAllConst
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%type <str> opt_with_grant opt_cursor ConstraintsSetStmt AllConst
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@@ -357,12 +357,12 @@ make_name(void)
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%type <str> struct_type s_struct declaration declarations variable_declarations
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%type <str> s_union union_type ECPGSetAutocommit on_off
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%type <str> ECPGAllocateDescr ECPGDeallocateDescr symbol opt_symbol
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%type <str> ECPGGetDescriptorHeader ECPGColLabel ECPGTypeName
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%type <str> ECPGLabelTypeName ECPGColId variablelist cvariable
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%type <str> ECPGGetDescriptorHeader ECPGTypeFuncId ECPGColId ECPGColLabel
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%type <str> ECPGTypeName variablelist cvariable
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%type <descriptor> ECPGGetDescriptor
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%type <type_enum> simple_type signed_type unsigned_type varchar_type
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%type <type_enum> simple_type signed_type unsigned_type
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%type <dtype_enum> descriptor_item desc_header_item
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@@ -913,11 +913,11 @@ constraints_set_list: ALL
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;
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constraints_set_namelist: IDENT
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constraints_set_namelist: ColId
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{
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$$ = $1;
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}
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| constraints_set_namelist ',' IDENT
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| constraints_set_namelist ',' ColId
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{
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$$ = cat_str(3, $1, make_str(","), $3);
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}
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@@ -1529,8 +1529,8 @@ def_elem: ColLabel '=' def_arg {
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}
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;
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/* Note: any simple identifier will be returned as a type name! */
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def_arg: func_return { $$ = $1; }
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| TokenId { $$ = $1; }
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| all_Op { $$ = $1; }
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| AllConst { $$ = $1; }
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;
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@@ -1964,7 +1964,7 @@ func_type: Typename
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{
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$$ = $1;
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}
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| IDENT '.' ColId '%' TYPE_P
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| TypeFuncId '.' ColId '%' TYPE_P
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{
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$$ = cat_str(4, $1, make_str("."), $3, make_str("% type"));
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}
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@@ -2974,20 +2974,11 @@ SimpleTypename: ConstTypename { $$ = $1; }
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ConstTypename: Generic { $$ = $1; }
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| ConstDatetime { $$ = $1; }
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| Numeric { $$ = $1; }
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| Geometric { $$ = $1; }
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| Bit { $$ = $1; }
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| Character { $$ = $1; }
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;
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Generic: generic
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{
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$$ = $1;
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}
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;
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generic: ident { $$ = $1; }
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| TYPE_P { $$ = make_str("type"); }
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| ECPGKeywords { $$ = $1; }
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Generic: TypeFuncId { $$ = $1; }
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| ECPGTypeName { $$ = $1; }
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;
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@@ -3018,8 +3009,6 @@ Numeric: FLOAT opt_float
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}
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;
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Geometric: PATH_P { $$ = make_str("path"); };
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opt_float: '(' PosIntConst ')'
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{
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$$ = cat_str(3, make_str("("), $2, make_str(")"));
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@@ -3115,11 +3104,7 @@ opt_collate: COLLATE ColId { $$ = cat2_str(make_str("collate"), $2); }
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| /*EMPTY*/ { $$ = EMPTY; }
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;
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ConstDatetime: datetime
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{
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$$ = $1;
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}
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| TIMESTAMP '(' PosIntConst ')' opt_timezone
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ConstDatetime: TIMESTAMP '(' PosIntConst ')' opt_timezone
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{
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$$ = cat_str(4, make_str("timestamp("), $3, make_str(")"), $5);
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}
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@@ -3143,14 +3128,6 @@ ConstInterval: INTERVAL
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}
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;
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datetime: YEAR_P { $$ = make_str("year"); }
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| MONTH_P { $$ = make_str("month"); }
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| DAY_P { $$ = make_str("day"); }
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| HOUR_P { $$ = make_str("hour"); }
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| MINUTE_P { $$ = make_str("minute"); }
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| SECOND_P { $$ = make_str("second"); }
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;
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opt_timezone: WITH TIME ZONE { $$ = make_str("with time zone"); }
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| WITHOUT TIME ZONE { $$ = make_str("without time zone"); }
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| /*EMPTY*/ { $$ = EMPTY; }
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@@ -3544,9 +3521,14 @@ extract_list: extract_arg FROM a_expr
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* - thomas 2001-04-12
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*/
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extract_arg: datetime { $$ = $1; }
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| StringConst { $$ = $1; }
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| IDENT { $$ = $1; }
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extract_arg: IDENT { $$ = $1; }
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| YEAR_P { $$ = make_str("year"); }
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| MONTH_P { $$ = make_str("month"); }
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| DAY_P { $$ = make_str("day"); }
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| HOUR_P { $$ = make_str("hour"); }
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| MINUTE_P { $$ = make_str("minute"); }
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| SECOND_P { $$ = make_str("second"); }
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| StringConst { $$ = $1; }
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;
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/* position_list uses b_expr not a_expr to avoid conflict with general IN */
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@@ -3750,22 +3732,6 @@ attr_name: ColId { $$ = $1; };
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class: ColId { $$ = $1; };
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index_name: ColId { $$ = $1; };
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/* Functions
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* Include date/time keywords as SQL92 extension.
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* Include TYPE as a SQL92 unreserved keyword. - thomas 1997-10-05
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*/
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func_name: ColId { $$ = $1; };
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| BETWEEN { $$ = make_str("between");}
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| ILIKE { $$ = make_str("ilike");}
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| IN { $$ = make_str("in");}
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| IS { $$ = make_str("is");}
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| ISNULL { $$ = make_str("isnull");}
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| LIKE { $$ = make_str("like");}
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| NOTNULL { $$ = make_str("notnull");}
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| OVERLAPS { $$ = make_str("overlaps");}
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;
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file_name: StringConst { $$ = $1; };
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/* Constants
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@@ -3859,26 +3825,6 @@ PosAllConst: Sconst { $$ = $1; }
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UserId: ColId { $$ = $1;};
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/* Column identifier
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*/
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ColId: ECPGColId { $$ = $1; }
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/* | ECPGTypeName { $$ = $1; }*/
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;
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/* Column label
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* Allowed labels in "AS" clauses.
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* Include TRUE/FALSE SQL3 reserved words for Postgres backward
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* compatibility. Cannot allow this for column names since the
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* syntax would not distinguish between the constant value and
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* a column name. - thomas 1997-10-24
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* Add other keywords to this list. Note that they appear here
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* rather than in ColId if there was a shift/reduce conflict
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* when used as a full identifier. - thomas 1997-11-06
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*/
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ColLabel: ECPGLabelTypeName { $$ = $1; }
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| ECPGColLabel { $$ = $1; }
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;
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SpecialRuleRelation: OLD
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{
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if (!QueryIsRule)
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@@ -4220,13 +4166,6 @@ type: simple_type
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$$.type_dimension = -1;
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$$.type_index = -1;
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}
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| varchar_type
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{
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$$.type_enum = ECPGt_varchar;
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$$.type_str = make_str("varchar");;
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$$.type_dimension = -1;
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$$.type_index = -1;
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}
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| struct_type
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{
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$$.type_enum = ECPGt_struct;
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@@ -4250,14 +4189,42 @@ type: simple_type
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}
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| ECPGColLabel
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{
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/* this is for typedef'ed types */
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struct typedefs *this = get_typedef($1);
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/*
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* Check for type names that the SQL grammar treats as
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* unreserved keywords
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*/
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if (strcmp($1, "varchar") == 0)
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{
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$$.type_enum = ECPGt_varchar;
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$$.type_str = make_str("varchar");
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$$.type_dimension = -1;
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$$.type_index = -1;
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}
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else if (strcmp($1, "float") == 0)
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{
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$$.type_enum = ECPGt_float;
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$$.type_str = make_str("float");
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$$.type_dimension = -1;
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$$.type_index = -1;
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}
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else if (strcmp($1, "double") == 0)
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{
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$$.type_enum = ECPGt_double;
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$$.type_str = make_str("double");
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$$.type_dimension = -1;
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$$.type_index = -1;
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}
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else
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{
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/* this is for typedef'ed types */
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struct typedefs *this = get_typedef($1);
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$$.type_str = (this->type->type_enum == ECPGt_varchar) ? EMPTY : mm_strdup(this->name);
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$$.type_enum = this->type->type_enum;
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$$.type_dimension = this->type->type_dimension;
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$$.type_index = this->type->type_index;
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struct_member_list[struct_level] = ECPGstruct_member_dup(this->struct_member_list);
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$$.type_str = (this->type->type_enum == ECPGt_varchar) ? EMPTY : mm_strdup(this->name);
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$$.type_enum = this->type->type_enum;
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$$.type_dimension = this->type->type_dimension;
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$$.type_index = this->type->type_index;
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struct_member_list[struct_level] = ECPGstruct_member_dup(this->struct_member_list);
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}
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}
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;
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@@ -4359,9 +4326,7 @@ signed_type: SQL_SHORT { $$ = ECPGt_short; }
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$$ = ECPGt_long;
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#endif
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}
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| SQL_BOOL { $$ = ECPGt_bool; };
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| FLOAT { $$ = ECPGt_float; }
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| DOUBLE { $$ = ECPGt_double; }
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| SQL_BOOL { $$ = ECPGt_bool; }
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| CHAR { $$ = ECPGt_char; }
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;
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@@ -4369,8 +4334,6 @@ opt_signed: SQL_SIGNED
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| /* EMPTY */
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;
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varchar_type: VARCHAR { $$ = ECPGt_varchar; };
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variable_list: variable
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{
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$$ = $1;
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@@ -4686,7 +4649,7 @@ ECPGSetConnection: SET SQL_CONNECTION to_equal connection_object
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/*
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* define a new type for embedded SQL
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*/
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ECPGTypedef: TYPE_P ECPGColLabel IS type opt_type_array_bounds opt_reference
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ECPGTypedef: TYPE_P ColLabel IS type opt_type_array_bounds opt_reference
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{
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/* add entry to list */
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struct typedefs *ptr, *this;
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@@ -4779,7 +4742,7 @@ opt_reference: SQL_REFERENCE { $$ = make_str("reference"); }
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/*
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* define the type of one variable for embedded SQL
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*/
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ECPGVar: SQL_VAR ECPGColLabel IS type opt_type_array_bounds opt_reference
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ECPGVar: SQL_VAR ColLabel IS type opt_type_array_bounds opt_reference
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{
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struct variable *p = find_variable($2);
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int dimension = $5.index1;
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@@ -4956,16 +4919,6 @@ ECPGTypeName: SQL_BOOL { $$ = make_str("bool"); }
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| SQL_STRUCT { $$ = make_str("struct"); }
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| SQL_SIGNED { $$ = make_str("signed"); }
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| SQL_UNSIGNED { $$ = make_str("unsigned"); }
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| DOUBLE { $$ = make_str("double"); }
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;
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/* not needed at the moment
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* | UNION { $$ = make_str("union"); }
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*/
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ECPGLabelTypeName: CHAR { $$ = make_str("char"); }
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| FLOAT { $$ = make_str("float"); }
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| VARCHAR { $$ = make_str("varchar"); }
|
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/* | ECPGTypeName { $$ = $1; }*/
|
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;
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opt_symbol: symbol { $$ = $1; }
|
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@@ -4974,258 +4927,352 @@ opt_symbol: symbol { $$ = $1; }
|
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symbol: ColLabel { $$ = $1; };
|
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/* Parser tokens to be used as identifiers.
|
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* Tokens involving data types should appear in ColId only,
|
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* since they will conflict with real TypeName productions.
|
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/*
|
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* Keyword classification lists. Generally, every keyword present in
|
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* the Postgres grammar should be in one of these lists. (Presently,
|
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* "AS" is the sole exception: it is our only completely-reserved word.)
|
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*
|
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* Put a new keyword into the earliest list (of TypeFuncId, ColId, ColLabel)
|
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* that it can go into without creating shift or reduce conflicts. The
|
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* earlier lists define "less reserved" categories of keywords. Notice that
|
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* each list includes by reference the ones before it.
|
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*/
|
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TokenId: ABSOLUTE { $$ = make_str("absolute"); }
|
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| ACCESS { $$ = make_str("access"); }
|
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| ACTION { $$ = make_str("action"); }
|
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| ADD { $$ = make_str("add"); }
|
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| AFTER { $$ = make_str("after"); }
|
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| AGGREGATE { $$ = make_str("aggregate"); }
|
||||
| ALTER { $$ = make_str("alter"); }
|
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| AT { $$ = make_str("at"); }
|
||||
| AUTHORIZATION { $$ = make_str("authorization"); }
|
||||
| BACKWARD { $$ = make_str("backward"); }
|
||||
| BEFORE { $$ = make_str("before"); }
|
||||
| BEGIN_TRANS { $$ = make_str("begin"); }
|
||||
| CACHE { $$ = make_str("cache"); }
|
||||
| CASCADE { $$ = make_str("cascade"); }
|
||||
| CHAIN { $$ = make_str("chain"); }
|
||||
| CHARACTERISTICS { $$ = make_str("characteristics"); }
|
||||
| CHECKPOINT { $$ = make_str("checkpoint"); }
|
||||
| CLOSE { $$ = make_str("close"); }
|
||||
| COMMENT { $$ = make_str("comment"); }
|
||||
| COMMIT { $$ = make_str("commit"); }
|
||||
| COMMITTED { $$ = make_str("committed"); }
|
||||
| CONSTRAINTS { $$ = make_str("constraints"); }
|
||||
| CREATEDB { $$ = make_str("createdb"); }
|
||||
| CREATEUSER { $$ = make_str("createuser"); }
|
||||
| CYCLE { $$ = make_str("cycle"); }
|
||||
| DATABASE { $$ = make_str("database"); }
|
||||
| DECLARE { $$ = make_str("declare"); }
|
||||
| DEFERRED { $$ = make_str("deferred"); }
|
||||
| DELETE { $$ = make_str("delete"); }
|
||||
| DELIMITERS { $$ = make_str("delimiters"); }
|
||||
| DROP { $$ = make_str("drop"); }
|
||||
| EACH { $$ = make_str("each"); }
|
||||
| ENCODING { $$ = make_str("encoding"); }
|
||||
| ENCRYPTED { $$ = make_str("encrypted"); }
|
||||
| ESCAPE { $$ = make_str("escape"); }
|
||||
| EXCLUSIVE { $$ = make_str("exclusive"); }
|
||||
| EXECUTE { $$ = make_str("execute"); }
|
||||
| FETCH { $$ = make_str("fetch"); }
|
||||
| FORCE { $$ = make_str("force"); }
|
||||
| FORWARD { $$ = make_str("forward"); }
|
||||
| FUNCTION { $$ = make_str("function"); }
|
||||
| GRANT { $$ = make_str("grant"); }
|
||||
| HANDLER { $$ = make_str("handler"); }
|
||||
| IMMEDIATE { $$ = make_str("immediate"); }
|
||||
| INCREMENT { $$ = make_str("increment"); }
|
||||
| INDEX { $$ = make_str("index"); }
|
||||
| INHERITS { $$ = make_str("inherits"); }
|
||||
| INSENSITIVE { $$ = make_str("insensitive"); }
|
||||
| INSERT { $$ = make_str("insert"); }
|
||||
| INSTEAD { $$ = make_str("instead"); }
|
||||
| ISOLATION { $$ = make_str("isolation"); }
|
||||
| KEY { $$ = make_str("key"); }
|
||||
| LANGUAGE { $$ = make_str("language"); }
|
||||
| LANCOMPILER { $$ = make_str("lancompiler"); }
|
||||
| LEVEL { $$ = make_str("level"); }
|
||||
| LOCATION { $$ = make_str("location"); }
|
||||
| MATCH { $$ = make_str("match"); }
|
||||
| MAXVALUE { $$ = make_str("maxvalue"); }
|
||||
| MINVALUE { $$ = make_str("minvalue"); }
|
||||
| MODE { $$ = make_str("mode"); }
|
||||
| NAMES { $$ = make_str("names"); }
|
||||
| NEXT { $$ = make_str("next"); }
|
||||
| NO { $$ = make_str("no"); }
|
||||
| NOCREATEDB { $$ = make_str("nocreatedb"); }
|
||||
| NOCREATEUSER { $$ = make_str("nocreateuser"); }
|
||||
| NOTHING { $$ = make_str("nothing"); }
|
||||
| NOTIFY { $$ = make_str("notify"); }
|
||||
| OF { $$ = make_str("of"); }
|
||||
| OIDS { $$ = make_str("oids"); }
|
||||
| OPERATOR { $$ = make_str("operator"); }
|
||||
| OPTION { $$ = make_str("option"); }
|
||||
| OWNER { $$ = make_str("owner"); }
|
||||
| PARTIAL { $$ = make_str("partial"); }
|
||||
| PASSWORD { $$ = make_str("password"); }
|
||||
| PENDANT { $$ = make_str("pendant"); }
|
||||
| PRIOR { $$ = make_str("prior"); }
|
||||
| PRIVILEGES { $$ = make_str("privileges"); }
|
||||
| PROCEDURAL { $$ = make_str("procedural"); }
|
||||
| PROCEDURE { $$ = make_str("procedure"); }
|
||||
| READ { $$ = make_str("read"); }
|
||||
| REINDEX { $$ = make_str("reindex"); }
|
||||
| RELATIVE { $$ = make_str("relative"); }
|
||||
| RENAME { $$ = make_str("rename"); }
|
||||
| REPLACE { $$ = make_str("replace"); }
|
||||
| RESTRICT { $$ = make_str("restrict"); }
|
||||
| RETURNS { $$ = make_str("returns"); }
|
||||
| REVOKE { $$ = make_str("revoke"); }
|
||||
| ROLLBACK { $$ = make_str("rollback"); }
|
||||
| ROW { $$ = make_str("row"); }
|
||||
| RULE { $$ = make_str("rule"); }
|
||||
| SCHEMA { $$ = make_str("schema"); }
|
||||
| SCROLL { $$ = make_str("scroll"); }
|
||||
| SESSION { $$ = make_str("session"); }
|
||||
| SEQUENCE { $$ = make_str("sequence"); }
|
||||
| SERIALIZABLE { $$ = make_str("serializable"); }
|
||||
| SET { $$ = make_str("set"); }
|
||||
| SHARE { $$ = make_str("share"); }
|
||||
| START { $$ = make_str("start"); }
|
||||
| STATEMENT { $$ = make_str("statement"); }
|
||||
| STATISTICS { $$ = make_str("statistics"); }
|
||||
| STDIN { $$ = make_str("stdin"); }
|
||||
| STDOUT { $$ = make_str("stdout"); }
|
||||
| SYSID { $$ = make_str("sysid"); }
|
||||
| TEMP { $$ = make_str("temp"); }
|
||||
| TEMPLATE { $$ = make_str("template"); }
|
||||
| TEMPORARY { $$ = make_str("temporary"); }
|
||||
| TOAST { $$ = make_str("toast"); }
|
||||
| TRIGGER { $$ = make_str("trigger"); }
|
||||
| TRUNCATE { $$ = make_str("truncate"); }
|
||||
| TRUSTED { $$ = make_str("trusted"); }
|
||||
| UNENCRYPTED { $$ = make_str("unencrypted"); }
|
||||
| UNLISTEN { $$ = make_str("unlisten"); }
|
||||
| UNTIL { $$ = make_str("until"); }
|
||||
| UPDATE { $$ = make_str("update"); }
|
||||
| VALID { $$ = make_str("valid"); }
|
||||
| VALUES { $$ = make_str("values"); }
|
||||
| VARYING { $$ = make_str("varying"); }
|
||||
| VERSION { $$ = make_str("version"); }
|
||||
| VIEW { $$ = make_str("view"); }
|
||||
| WITH { $$ = make_str("with"); }
|
||||
| WITHOUT { $$ = make_str("without"); }
|
||||
| WORK { $$ = make_str("work"); }
|
||||
| ZONE { $$ = make_str("zone"); }
|
||||
;
|
||||
|
||||
ECPGColId: ident { $$ = $1; }
|
||||
| TYPE_P { $$ = make_str("type"); }
|
||||
| datetime { $$ = $1; }
|
||||
| TokenId { $$ = $1; }
|
||||
| NATIONAL { $$ = make_str("national"); }
|
||||
| NONE { $$ = make_str("none"); }
|
||||
| PATH_P { $$ = make_str("path_p"); }
|
||||
| ECPGKeywords { $$ = $1; }
|
||||
;
|
||||
/* Type/func identifier --- names that can be type and function names
|
||||
* (as well as ColIds --- ie, these are completely unreserved keywords).
|
||||
*/
|
||||
TypeFuncId: ECPGTypeFuncId { $$ = $1; }
|
||||
| ECPGKeywords { $$ = $1; }
|
||||
;
|
||||
|
||||
ECPGColLabel: ECPGColId { $$ = $1; }
|
||||
| ABORT_TRANS { $$ = make_str("abort"); }
|
||||
| ALL { $$ = make_str("all"); }
|
||||
| ANALYSE { $$ = make_str("analyse"); }
|
||||
| ANALYZE { $$ = make_str("analyze"); }
|
||||
| ANY { $$ = make_str("any"); }
|
||||
| ASC { $$ = make_str("asc"); }
|
||||
| BETWEEN { $$ = make_str("between"); }
|
||||
| BINARY { $$ = make_str("binary"); }
|
||||
| BIT { $$ = make_str("bit"); }
|
||||
| BOTH { $$ = make_str("both"); }
|
||||
| CASE { $$ = make_str("case"); }
|
||||
| CAST { $$ = make_str("cast"); }
|
||||
| CHARACTER { $$ = make_str("character"); }
|
||||
| CHECK { $$ = make_str("check"); }
|
||||
| CLUSTER { $$ = make_str("cluster"); }
|
||||
| COALESCE { $$ = make_str("coalesce"); }
|
||||
| COLLATE { $$ = make_str("collate"); }
|
||||
| COLUMN { $$ = make_str("column"); }
|
||||
| CONSTRAINT { $$ = make_str("constraint"); }
|
||||
| COPY { $$ = make_str("copy"); }
|
||||
| CROSS { $$ = make_str("cross"); }
|
||||
| CURRENT_DATE { $$ = make_str("current_date"); }
|
||||
| CURRENT_TIME { $$ = make_str("current_time"); }
|
||||
| CURRENT_TIMESTAMP { $$ = make_str("current_timestamp"); }
|
||||
| CURRENT_USER { $$ = make_str("current_user"); }
|
||||
| DEC { $$ = make_str("dec"); }
|
||||
| DECIMAL { $$ = make_str("decimal"); }
|
||||
| DEFAULT { $$ = make_str("default"); }
|
||||
| DEFERRABLE { $$ = make_str("deferrable"); }
|
||||
| DESC { $$ = make_str("desc"); }
|
||||
| DISTINCT { $$ = make_str("distinct"); }
|
||||
| DO { $$ = make_str("do"); }
|
||||
| ELSE { $$ = make_str("else"); }
|
||||
| END_TRANS { $$ = make_str("end"); }
|
||||
| EXCEPT { $$ = make_str("except"); }
|
||||
| EXISTS { $$ = make_str("exists"); }
|
||||
| EXPLAIN { $$ = make_str("explain"); }
|
||||
| EXTRACT { $$ = make_str("extract"); }
|
||||
| FALSE_P { $$ = make_str("false"); }
|
||||
| FOR { $$ = make_str("for"); }
|
||||
| FOREIGN { $$ = make_str("foreign"); }
|
||||
| FREEZE { $$ = make_str("freeze"); }
|
||||
| FROM { $$ = make_str("from"); }
|
||||
| FULL { $$ = make_str("full"); }
|
||||
| GLOBAL { $$ = make_str("global"); }
|
||||
| GROUP { $$ = make_str("group"); }
|
||||
| HAVING { $$ = make_str("having"); }
|
||||
| ILIKE { $$ = make_str("ilike"); }
|
||||
| IN { $$ = make_str("in"); }
|
||||
| INITIALLY { $$ = make_str("initially"); }
|
||||
| INNER_P { $$ = make_str("inner"); }
|
||||
| INOUT { $$ = make_str("inout"); }
|
||||
| INTERSECT { $$ = make_str("intersect"); }
|
||||
| INTERVAL { $$ = make_str("interval"); }
|
||||
| INTO { $$ = make_str("into"); }
|
||||
| IS { $$ = make_str("is"); }
|
||||
| ISNULL { $$ = make_str("isnull"); }
|
||||
| JOIN { $$ = make_str("join"); }
|
||||
| LEADING { $$ = make_str("leading"); }
|
||||
| LEFT { $$ = make_str("left"); }
|
||||
| LIKE { $$ = make_str("like"); }
|
||||
| LIMIT { $$ = make_str("limit"); }
|
||||
| LISTEN { $$ = make_str("listen"); }
|
||||
| LOAD { $$ = make_str("load"); }
|
||||
| LOCK_P { $$ = make_str("lock"); }
|
||||
| MOVE { $$ = make_str("move"); }
|
||||
| NATURAL { $$ = make_str("natural"); }
|
||||
| NCHAR { $$ = make_str("nchar"); }
|
||||
| NEW { $$ = make_str("new"); }
|
||||
| NOT { $$ = make_str("not"); }
|
||||
| NOTNULL { $$ = make_str("notnull"); }
|
||||
| NULLIF { $$ = make_str("nullif"); }
|
||||
| NULL_P { $$ = make_str("null"); }
|
||||
| NUMERIC { $$ = make_str("numeric"); }
|
||||
| OFF { $$ = make_str("off"); }
|
||||
| OFFSET { $$ = make_str("offset"); }
|
||||
| OLD { $$ = make_str("old"); }
|
||||
| ON { $$ = make_str("on"); }
|
||||
| ONLY { $$ = make_str("only"); }
|
||||
| OR { $$ = make_str("or"); }
|
||||
| ORDER { $$ = make_str("order"); }
|
||||
| OUT { $$ = make_str("out"); }
|
||||
| OUTER_P { $$ = make_str("outer"); }
|
||||
| OVERLAPS { $$ = make_str("overlaps"); }
|
||||
| POSITION { $$ = make_str("position"); }
|
||||
| PRECISION { $$ = make_str("precision"); }
|
||||
| PRIMARY { $$ = make_str("primary"); }
|
||||
| PUBLIC { $$ = make_str("public"); }
|
||||
| REFERENCES { $$ = make_str("references"); }
|
||||
| RESET { $$ = make_str("reset"); }
|
||||
| RIGHT { $$ = make_str("right"); }
|
||||
| SELECT { $$ = make_str("select"); }
|
||||
| SESSION_USER { $$ = make_str("session_user"); }
|
||||
| SETOF { $$ = make_str("setof"); }
|
||||
| SHOW { $$ = make_str("show"); }
|
||||
| SUBSTRING { $$ = make_str("substring"); }
|
||||
| TABLE { $$ = make_str("table"); }
|
||||
| THEN { $$ = make_str("then"); }
|
||||
| TIME { $$ = make_str("time"); }
|
||||
| TIMESTAMP { $$ = make_str("timestamp"); }
|
||||
| TO { $$ = make_str("to"); }
|
||||
| TRANSACTION { $$ = make_str("transaction"); }
|
||||
| TRIM { $$ = make_str("trim"); }
|
||||
| TRUE_P { $$ = make_str("true"); }
|
||||
| UNIQUE { $$ = make_str("unique"); }
|
||||
| UNKNOWN { $$ = make_str("unknown"); }
|
||||
| USER { $$ = make_str("user"); }
|
||||
| USING { $$ = make_str("using"); }
|
||||
| VACUUM { $$ = make_str("vacuum"); }
|
||||
| VERBOSE { $$ = make_str("verbose"); }
|
||||
| WHEN { $$ = make_str("when"); }
|
||||
| WHERE { $$ = make_str("where"); }
|
||||
ECPGTypeFuncId: ident { $$ = $1; }
|
||||
| ABORT_TRANS { $$ = make_str("abort"); }
|
||||
| ABSOLUTE { $$ = make_str("absolute"); }
|
||||
| ACCESS { $$ = make_str("access"); }
|
||||
| ACTION { $$ = make_str("action"); }
|
||||
| ADD { $$ = make_str("add"); }
|
||||
| AFTER { $$ = make_str("after"); }
|
||||
| AGGREGATE { $$ = make_str("aggregate"); }
|
||||
| ALTER { $$ = make_str("alter"); }
|
||||
| AT { $$ = make_str("at"); }
|
||||
| AUTHORIZATION { $$ = make_str("authorization"); }
|
||||
| BACKWARD { $$ = make_str("backward"); }
|
||||
| BEFORE { $$ = make_str("before"); }
|
||||
| BEGIN_TRANS { $$ = make_str("begin"); }
|
||||
| BY { $$ = make_str("by"); }
|
||||
| CACHE { $$ = make_str("cache"); }
|
||||
| CASCADE { $$ = make_str("cascade"); }
|
||||
| CHAIN { $$ = make_str("chain"); }
|
||||
| CHARACTERISTICS { $$ = make_str("characteristics"); }
|
||||
| CHECKPOINT { $$ = make_str("checkpoint"); }
|
||||
| CLOSE { $$ = make_str("close"); }
|
||||
| CLUSTER { $$ = make_str("cluster"); }
|
||||
| COMMENT { $$ = make_str("comment"); }
|
||||
| COMMIT { $$ = make_str("commit"); }
|
||||
| COMMITTED { $$ = make_str("committed"); }
|
||||
| CONSTRAINTS { $$ = make_str("constraints"); }
|
||||
| COPY { $$ = make_str("copy"); }
|
||||
| CREATE { $$ = make_str("create"); }
|
||||
| CREATEDB { $$ = make_str("createdb"); }
|
||||
| CREATEUSER { $$ = make_str("createuser"); }
|
||||
| CURSOR { $$ = make_str("cursor"); }
|
||||
| CYCLE { $$ = make_str("cycle"); }
|
||||
| DATABASE { $$ = make_str("database"); }
|
||||
| DAY_P { $$ = make_str("day"); }
|
||||
| DECLARE { $$ = make_str("declare"); }
|
||||
| DEFERRED { $$ = make_str("deferred"); }
|
||||
| DELETE { $$ = make_str("delete"); }
|
||||
| DELIMITERS { $$ = make_str("delimiters"); }
|
||||
| DOUBLE { $$ = make_str("double"); }
|
||||
| DROP { $$ = make_str("drop"); }
|
||||
| EACH { $$ = make_str("each"); }
|
||||
| ENCODING { $$ = make_str("encoding"); }
|
||||
| ENCRYPTED { $$ = make_str("encrypted"); }
|
||||
| ESCAPE { $$ = make_str("escape"); }
|
||||
| EXCLUSIVE { $$ = make_str("exclusive"); }
|
||||
| EXECUTE { $$ = make_str("execute"); }
|
||||
| EXPLAIN { $$ = make_str("explain"); }
|
||||
| FETCH { $$ = make_str("fetch"); }
|
||||
| FORCE { $$ = make_str("force"); }
|
||||
| FORWARD { $$ = make_str("forward"); }
|
||||
| FUNCTION { $$ = make_str("function"); }
|
||||
| GLOBAL { $$ = make_str("global"); }
|
||||
| GRANT { $$ = make_str("grant"); }
|
||||
| HANDLER { $$ = make_str("handler"); }
|
||||
| HOUR_P { $$ = make_str("hour"); }
|
||||
| IMMEDIATE { $$ = make_str("immediate"); }
|
||||
| INCREMENT { $$ = make_str("increment"); }
|
||||
| INDEX { $$ = make_str("index"); }
|
||||
| INHERITS { $$ = make_str("inherits"); }
|
||||
| INOUT { $$ = make_str("inout"); }
|
||||
| INSENSITIVE { $$ = make_str("insensitive"); }
|
||||
| INSERT { $$ = make_str("insert"); }
|
||||
| INSTEAD { $$ = make_str("instead"); }
|
||||
| ISOLATION { $$ = make_str("isolation"); }
|
||||
| KEY { $$ = make_str("key"); }
|
||||
| LANGUAGE { $$ = make_str("language"); }
|
||||
| LANCOMPILER { $$ = make_str("lancompiler"); }
|
||||
| LEVEL { $$ = make_str("level"); }
|
||||
| LISTEN { $$ = make_str("listen"); }
|
||||
| LOAD { $$ = make_str("load"); }
|
||||
| LOCAL { $$ = make_str("local"); }
|
||||
| LOCATION { $$ = make_str("location"); }
|
||||
| LOCK_P { $$ = make_str("lock"); }
|
||||
| MATCH { $$ = make_str("match"); }
|
||||
| MAXVALUE { $$ = make_str("maxvalue"); }
|
||||
| MINUTE_P { $$ = make_str("minute"); }
|
||||
| MINVALUE { $$ = make_str("minvalue"); }
|
||||
| MODE { $$ = make_str("mode"); }
|
||||
| MONTH_P { $$ = make_str("month"); }
|
||||
| MOVE { $$ = make_str("move"); }
|
||||
| NAMES { $$ = make_str("names"); }
|
||||
| NATIONAL { $$ = make_str("national"); }
|
||||
| NEXT { $$ = make_str("next"); }
|
||||
| NO { $$ = make_str("no"); }
|
||||
| NOCREATEDB { $$ = make_str("nocreatedb"); }
|
||||
| NOCREATEUSER { $$ = make_str("nocreateuser"); }
|
||||
| NOTHING { $$ = make_str("nothing"); }
|
||||
| NOTIFY { $$ = make_str("notify"); }
|
||||
| OF { $$ = make_str("of"); }
|
||||
| OIDS { $$ = make_str("oids"); }
|
||||
| OPERATOR { $$ = make_str("operator"); }
|
||||
| OPTION { $$ = make_str("option"); }
|
||||
| OUT { $$ = make_str("out"); }
|
||||
| OWNER { $$ = make_str("owner"); }
|
||||
| PARTIAL { $$ = make_str("partial"); }
|
||||
| PASSWORD { $$ = make_str("password"); }
|
||||
| PATH_P { $$ = make_str("path"); }
|
||||
| PENDANT { $$ = make_str("pendant"); }
|
||||
| PRECISION { $$ = make_str("precision"); }
|
||||
| PRIOR { $$ = make_str("prior"); }
|
||||
| PRIVILEGES { $$ = make_str("privileges"); }
|
||||
| PROCEDURAL { $$ = make_str("procedural"); }
|
||||
| PROCEDURE { $$ = make_str("procedure"); }
|
||||
| READ { $$ = make_str("read"); }
|
||||
| REINDEX { $$ = make_str("reindex"); }
|
||||
| RELATIVE { $$ = make_str("relative"); }
|
||||
| RENAME { $$ = make_str("rename"); }
|
||||
| REPLACE { $$ = make_str("replace"); }
|
||||
| RESET { $$ = make_str("reset"); }
|
||||
| RESTRICT { $$ = make_str("restrict"); }
|
||||
| RETURNS { $$ = make_str("returns"); }
|
||||
| REVOKE { $$ = make_str("revoke"); }
|
||||
| ROLLBACK { $$ = make_str("rollback"); }
|
||||
| ROW { $$ = make_str("row"); }
|
||||
| RULE { $$ = make_str("rule"); }
|
||||
| SCHEMA { $$ = make_str("schema"); }
|
||||
| SCROLL { $$ = make_str("scroll"); }
|
||||
| SECOND_P { $$ = make_str("second"); }
|
||||
| SESSION { $$ = make_str("session"); }
|
||||
| SEQUENCE { $$ = make_str("sequence"); }
|
||||
| SERIALIZABLE { $$ = make_str("serializable"); }
|
||||
| SET { $$ = make_str("set"); }
|
||||
| SHARE { $$ = make_str("share"); }
|
||||
| SHOW { $$ = make_str("show"); }
|
||||
| START { $$ = make_str("start"); }
|
||||
| STATEMENT { $$ = make_str("statement"); }
|
||||
| STATISTICS { $$ = make_str("statistics"); }
|
||||
| STDIN { $$ = make_str("stdin"); }
|
||||
| STDOUT { $$ = make_str("stdout"); }
|
||||
| SYSID { $$ = make_str("sysid"); }
|
||||
| TEMP { $$ = make_str("temp"); }
|
||||
| TEMPLATE { $$ = make_str("template"); }
|
||||
| TEMPORARY { $$ = make_str("temporary"); }
|
||||
| TOAST { $$ = make_str("toast"); }
|
||||
| TRANSACTION { $$ = make_str("transaction"); }
|
||||
| TRIGGER { $$ = make_str("trigger"); }
|
||||
| TRUNCATE { $$ = make_str("truncate"); }
|
||||
| TRUSTED { $$ = make_str("trusted"); }
|
||||
| TYPE_P { $$ = make_str("type"); }
|
||||
| UNENCRYPTED { $$ = make_str("unencrypted"); }
|
||||
| UNKNOWN { $$ = make_str("unknown"); }
|
||||
| UNLISTEN { $$ = make_str("unlisten"); }
|
||||
| UNTIL { $$ = make_str("until"); }
|
||||
| UPDATE { $$ = make_str("update"); }
|
||||
| VACUUM { $$ = make_str("vacuum"); }
|
||||
| VALID { $$ = make_str("valid"); }
|
||||
| VALUES { $$ = make_str("values"); }
|
||||
| VARYING { $$ = make_str("varying"); }
|
||||
| VERSION { $$ = make_str("version"); }
|
||||
| VIEW { $$ = make_str("view"); }
|
||||
| WITH { $$ = make_str("with"); }
|
||||
| WITHOUT { $$ = make_str("without"); }
|
||||
| WORK { $$ = make_str("work"); }
|
||||
| YEAR_P { $$ = make_str("year"); }
|
||||
| ZONE { $$ = make_str("zone"); }
|
||||
;
|
||||
|
||||
/* Column identifier --- names that can be column, table, etc names.
|
||||
*
|
||||
* This contains the TypeFuncId list plus those keywords that conflict
|
||||
* only with typename productions, not with other uses. Note that
|
||||
* most of these keywords will in fact be recognized as type names too;
|
||||
* they just have to have special productions for the purpose.
|
||||
*
|
||||
* Most of these cannot be in TypeFuncId (ie, are not also usable as function
|
||||
* names) because they can be followed by '(' in typename productions, which
|
||||
* looks too much like a function call for a LALR(1) parser.
|
||||
*/
|
||||
ColId: ECPGColId { $$ = $1; }
|
||||
| CHAR { $$ = make_str("char"); }
|
||||
;
|
||||
|
||||
ECPGColId: TypeFuncId { $$ = $1; }
|
||||
| BIT { $$ = make_str("bit"); }
|
||||
/* CHAR must be excluded from ECPGColLabel because of conflict with UNSIGNED
|
||||
| CHAR { $$ = make_str("char"); }
|
||||
*/
|
||||
| CHARACTER { $$ = make_str("character"); }
|
||||
| DEC { $$ = make_str("dec"); }
|
||||
| DECIMAL { $$ = make_str("decimal"); }
|
||||
| FLOAT { $$ = make_str("float"); }
|
||||
| INTERVAL { $$ = make_str("interval"); }
|
||||
| NCHAR { $$ = make_str("nchar"); }
|
||||
| NONE { $$ = make_str("none"); }
|
||||
| NUMERIC { $$ = make_str("numeric"); }
|
||||
| SETOF { $$ = make_str("setof"); }
|
||||
| TIME { $$ = make_str("time"); }
|
||||
| TIMESTAMP { $$ = make_str("timestamp"); }
|
||||
| VARCHAR { $$ = make_str("varchar"); }
|
||||
;
|
||||
|
||||
/* Column label --- allowed labels in "AS" clauses.
|
||||
*
|
||||
* Keywords appear here if they could not be distinguished from variable,
|
||||
* type, or function names in some contexts.
|
||||
* When adding a ColLabel, consider whether it can be added to func_name.
|
||||
*/
|
||||
ColLabel: ECPGColLabel { $$ = $1; }
|
||||
| CHAR { $$ = make_str("char"); }
|
||||
| UNION { $$ = make_str("union"); }
|
||||
;
|
||||
|
||||
ECPGColLabel: ECPGColId { $$ = $1; }
|
||||
| ALL { $$ = make_str("all"); }
|
||||
| ANALYSE { $$ = make_str("analyse"); } /* British */
|
||||
| ANALYZE { $$ = make_str("analyze"); }
|
||||
| AND { $$ = make_str("and"); }
|
||||
| ANY { $$ = make_str("any"); }
|
||||
| ASC { $$ = make_str("asc"); }
|
||||
| BETWEEN { $$ = make_str("between"); }
|
||||
| BINARY { $$ = make_str("binary"); }
|
||||
| BOTH { $$ = make_str("both"); }
|
||||
| CASE { $$ = make_str("case"); }
|
||||
| CAST { $$ = make_str("cast"); }
|
||||
| CHECK { $$ = make_str("check"); }
|
||||
| COALESCE { $$ = make_str("coalesce"); }
|
||||
| COLLATE { $$ = make_str("collate"); }
|
||||
| COLUMN { $$ = make_str("column"); }
|
||||
| CONSTRAINT { $$ = make_str("constraint"); }
|
||||
| CROSS { $$ = make_str("cross"); }
|
||||
| CURRENT_DATE { $$ = make_str("current_date"); }
|
||||
| CURRENT_TIME { $$ = make_str("current_time"); }
|
||||
| CURRENT_TIMESTAMP { $$ = make_str("current_timestamp"); }
|
||||
| CURRENT_USER { $$ = make_str("current_user"); }
|
||||
| DEFAULT { $$ = make_str("default"); }
|
||||
| DEFERRABLE { $$ = make_str("deferrable"); }
|
||||
| DESC { $$ = make_str("desc"); }
|
||||
| DISTINCT { $$ = make_str("distinct"); }
|
||||
| DO { $$ = make_str("do"); }
|
||||
| ELSE { $$ = make_str("else"); }
|
||||
| END_TRANS { $$ = make_str("end"); }
|
||||
| EXCEPT { $$ = make_str("except"); }
|
||||
| EXISTS { $$ = make_str("exists"); }
|
||||
| EXTRACT { $$ = make_str("extract"); }
|
||||
| FALSE_P { $$ = make_str("false"); }
|
||||
| FOR { $$ = make_str("for"); }
|
||||
| FOREIGN { $$ = make_str("foreign"); }
|
||||
| FREEZE { $$ = make_str("freeze"); }
|
||||
| FROM { $$ = make_str("from"); }
|
||||
| FULL { $$ = make_str("full"); }
|
||||
| GROUP { $$ = make_str("group"); }
|
||||
| HAVING { $$ = make_str("having"); }
|
||||
| ILIKE { $$ = make_str("ilike"); }
|
||||
| IN { $$ = make_str("in"); }
|
||||
| INITIALLY { $$ = make_str("initially"); }
|
||||
| INNER_P { $$ = make_str("inner"); }
|
||||
| INTERSECT { $$ = make_str("intersect"); }
|
||||
| INTO { $$ = make_str("into"); }
|
||||
| IS { $$ = make_str("is"); }
|
||||
| ISNULL { $$ = make_str("isnull"); }
|
||||
| JOIN { $$ = make_str("join"); }
|
||||
| LEADING { $$ = make_str("leading"); }
|
||||
| LEFT { $$ = make_str("left"); }
|
||||
| LIKE { $$ = make_str("like"); }
|
||||
| LIMIT { $$ = make_str("limit"); }
|
||||
| NATURAL { $$ = make_str("natural"); }
|
||||
| NEW { $$ = make_str("new"); }
|
||||
| NOT { $$ = make_str("not"); }
|
||||
| NOTNULL { $$ = make_str("notnull"); }
|
||||
| NULLIF { $$ = make_str("nullif"); }
|
||||
| NULL_P { $$ = make_str("null"); }
|
||||
| OFF { $$ = make_str("off"); }
|
||||
| OFFSET { $$ = make_str("offset"); }
|
||||
| OLD { $$ = make_str("old"); }
|
||||
| ON { $$ = make_str("on"); }
|
||||
| ONLY { $$ = make_str("only"); }
|
||||
| OR { $$ = make_str("or"); }
|
||||
| ORDER { $$ = make_str("order"); }
|
||||
| OUTER_P { $$ = make_str("outer"); }
|
||||
| OVERLAPS { $$ = make_str("overlaps"); }
|
||||
| POSITION { $$ = make_str("position"); }
|
||||
| PRIMARY { $$ = make_str("primary"); }
|
||||
| PUBLIC { $$ = make_str("public"); }
|
||||
| REFERENCES { $$ = make_str("references"); }
|
||||
| RIGHT { $$ = make_str("right"); }
|
||||
| SELECT { $$ = make_str("select"); }
|
||||
| SESSION_USER { $$ = make_str("session_user"); }
|
||||
| SOME { $$ = make_str("some"); }
|
||||
| SUBSTRING { $$ = make_str("substring"); }
|
||||
| TABLE { $$ = make_str("table"); }
|
||||
| THEN { $$ = make_str("then"); }
|
||||
| TO { $$ = make_str("to"); }
|
||||
| TRAILING { $$ = make_str("trailing"); }
|
||||
| TRIM { $$ = make_str("trim"); }
|
||||
| TRUE_P { $$ = make_str("true"); }
|
||||
/* UNION must be excluded from ECPGColLabel because of conflict with s_union
|
||||
| UNION { $$ = make_str("union"); }
|
||||
*/
|
||||
| UNIQUE { $$ = make_str("unique"); }
|
||||
| USER { $$ = make_str("user"); }
|
||||
| USING { $$ = make_str("using"); }
|
||||
| VERBOSE { $$ = make_str("verbose"); }
|
||||
| WHEN { $$ = make_str("when"); }
|
||||
| WHERE { $$ = make_str("where"); }
|
||||
;
|
||||
|
||||
/* Function identifier --- names that can be function names.
|
||||
*
|
||||
* This contains the TypeFuncId list plus some ColLabel keywords
|
||||
* that are used as operators in expressions; in general such keywords
|
||||
* can't be ColId because they would be ambiguous with variable names,
|
||||
* but they are unambiguous as function identifiers.
|
||||
*
|
||||
* Do not include POSITION, SUBSTRING, etc here since they have explicit
|
||||
* productions in a_expr to support the goofy SQL9x argument syntax.
|
||||
* - thomas 2000-11-28
|
||||
*/
|
||||
func_name: TypeFuncId { $$ = $1; }
|
||||
| BETWEEN { $$ = make_str("between"); }
|
||||
| BINARY { $$ = make_str("binary"); }
|
||||
| CROSS { $$ = make_str("cross"); }
|
||||
| FREEZE { $$ = make_str("freeze"); }
|
||||
| FULL { $$ = make_str("full"); }
|
||||
| ILIKE { $$ = make_str("ilike"); }
|
||||
| IN { $$ = make_str("in"); }
|
||||
| INNER_P { $$ = make_str("inner"); }
|
||||
| IS { $$ = make_str("is"); }
|
||||
| ISNULL { $$ = make_str("isnull"); }
|
||||
| JOIN { $$ = make_str("join"); }
|
||||
| LEFT { $$ = make_str("left"); }
|
||||
| LIKE { $$ = make_str("like"); }
|
||||
| NATURAL { $$ = make_str("natural"); }
|
||||
| NOTNULL { $$ = make_str("notnull"); }
|
||||
| OUTER_P { $$ = make_str("outer"); }
|
||||
| OVERLAPS { $$ = make_str("overlaps"); }
|
||||
| PUBLIC { $$ = make_str("public"); }
|
||||
| RIGHT { $$ = make_str("right"); }
|
||||
| VERBOSE { $$ = make_str("verbose"); }
|
||||
;
|
||||
|
||||
into_list : coutputvariable | into_list ',' coutputvariable;
|
||||
|
||||
Reference in New Issue
Block a user